United States Patent 3852834

A modular, combination plumbing fixture having a unitary shower enclosure with a single entrance for the user(s) thereof, a shower head mounted on the hollow frame of the entrance, with means for detachably interconnecting therewith in a self-aligning fashion, a splash receptor for the user of the plumbing fixture to stand on while drying outside of the shower enclosure.

Application Number:
Publication Date:
Filing Date:
Primary Class:
Other Classes:
International Classes:
A47K3/28; E03C1/01; (IPC1-7): A47K3/22
Field of Search:
View Patent Images:
US Patent References:
2059614Shower construction1936-11-03Schooler
1684503Shower receptor1928-09-18Nilson
1684502Shower receptor1928-09-18Nilson
1684502Shower receptorSeptember 1928Nilson
1530983Shower stall1925-03-24Corthaus

Primary Examiner:
Huckert, John W.
Assistant Examiner:
Henry, Jon W.
Attorney, Agent or Firm:
Lofstedt, Ben E.
I claim

1. A combination plumbing fixture for connection to a source of fluid and to a fluid drain, comprising:

2. The combination plumbing fixture of claim 1, further comprising:

3. The combination plumbing fixture of claim 1, further comprising second anchoring means for removably securing said shower enclosure to a wall of a building wherein said second anchoring means is not removable from the side of said building wall facing said shower enclosure.

4. The combination plumbing fixture of claim 1, wherein said drain means includes a "P" trap detachably connected thereto.

5. The combination plumbing fixture of claim 1 where said drain means comprises:

6. The combination plumbing fixture of claim 1, further comprising vent means in said shower enclosure wall, said vent means being adjacently disposed to the upper portion of said shower enclosure for venting the fluid vapors generated during the showering process from the shower enclosure.

7. A combination plumbing fixture for connection to a source of fluid under pressure and to an external fluid drain, and adapted to be disposed within a building, comprising:

8. The combination plumbing fixture of claim 7, wherein said first anchoring means comprises:

9. The combination plumbing fixture of claim 7, wherein said drain means comprises:

10. The combination plumbing fixture of claim 5, further comprising:

11. The combination plumbing fixture of claim 10, further comprising:

12. The combination plumbing fixture of claim 11, wherein said anchoring means for achoring said splash receptor to the floor of said building, comprises:

13. The combination plumbing fixture of claim 7, further comprising:

14. The combination plumbing fixture of claim 7, further comprising:

15. The combination plumbing fixture of claim 5, further comprising vent means in said shower enclosure wall, said vent means being adjacently disposed to the upper portion of said shower enclosure for venting the fluid vapors generated during the showering process from the shower enclosure.

16. The combination plumbing fixture of claim 1, further comprising:

17. The combination plumbing fixture of claim 1, further comprising a second anchoring means for securing said enclosure to said building, said second anchoring means comprising;


Combination fixtures having unitary shower enclosures and splash receptors of varied construction and adaptability to various uses have been available for some time. Such combinations have been found to be particularly useful in public institutions, such as prisons, jails and lockups, and like facilities where there exists both a need for rugged, portable showering facilities.

Such shower enclosures are highly desirable for containing water vapor and spray so as to minimize water vapor contact with the iron, steel and other corrodable materials in widespread use in such facilities which are used for both structural and security purposes. The advantages of the portability of such shower enclosures and the like are well known and need not be discussed in detail here.

Where multiple showering facilities are desired, shower enclosures must be capable of being stacked or nested side by side in a space-saving manner. The cost of floor area in these public institutions is very great and all floor area must be conserved and utilized as much as possible. The plumbing fixture combinations found in the prior art which embodied shower enclosures having showerheads disposed on the sidewalls of the enclosures could not be nested in a direct, side by side, spacesaving relationship, because the fluid supplying piping connected to the showerhead was placed exteriorly of the sidewall(s) and, therefore, prevented the enclosures from being nested sidewall-to-sidewall. Instead, the sidewalls of such adjacently located enclosures were separated by the space occupied by the fluid supply piping. Not only did this arrangement prevent the enclosures from being nested in a space-saving fashion, but in order to prevent the users of such plumbing fixture combinations from tampering by the users thereof, the open spaced areas between the enclosures required that they be covered and rendered inaccessible by means of access panels secured to these enclosures by means of special, costly security fasteners which can only be installed or removed by means of special tools restricted to authorized persons.

In the event that the shower enclosures were not required to be nested together and the showerhead was desired to be mounted on the sidewall of the enclosure in order to maintain the fluid supply piping in the necessary tamperproof condition, the generally rectangularly shaped enclosures required installation in a corner area. When installed in a corner, the rear wall of the enclosure typically was used as a mounting surface for the control for the fluid supply to the shower head. The showerhead mounted on the enclosure's sidewall which is placed in intimate abuttment with the wall behind which the plumbing is typically located is used to conceal the fluid supply piping from the user's side of the combination plumbing fixture.

If, on the other hand, only the rear wall of the enclosure is placed against the building's wall the fluid supply piping would be exposed to the user's side of the shower. It would, in this configuration, be exposed to tampering by the persons on the exposed side of the plumbing fixture. To conceal this piping would require the use of additional panels which must also be removable in the event that the piping required replacement or servicing.

Some combination plumbing fixtures as found in the prior art ran the exposed piping vertically along the sidewall and over the roof portion thereof. This arrangement required that a second removable access panel be used to conceal the piping run over the roof portion of the enclosure. This configuration entailed even greater expense and required additional concealing panels to conceal the piping.

In addition, the entirety of such plumbing fixture combinations must be constructed so as to be tamper-proof. No exposed fasteners or fastener covering devices should be removable from the side of the plumbing fixture which is accessible to the users thereof. If such are accessible, they must be removable only by means of special tools which are not in general use nor can be easily fabricated by the inmates of such institutions. All plumbing piping should be concealed and serviceable from the pipe chase area located outside of the users facilities or cell area and therefore not accessible to the prisoner or cell user. Not only should the piping be inaccessible or hidden from the user, but it should be contained within the combination plumbing fixture so that in the event that a water leak develops the water will be contained within the fixture and directed into the pipe chase rather than into the cell or room area.

The spray of the shower head must be adjustable from within the shower enclosure yet must be vandal-proof, and constructed in such a manner so that it cannot be removed or disassembled from the users side of the enclosure. A highly desirable feature of such a fixture would be to locate the shower head within the enclosure so that it cannot direct the water spray towards the entrance to the shower enclosure. Frequently, in prior art combinations, the shower heads were mounted so as to direct water towards the entrance of the shower enclosure. This resulted in a significant amount of water being deposited outside of the shower enclosure. Adding a door to the shower enclosure in order to prevent this from occuring is not acceptable in penal institutions because the inmate is not visible to the guard with the shower door closed. Should a significant amount of water be deposited outside of the enclosure, it forms into pools or "puddles" of water on the floor thereby creating a safety hazard as well as oftentimes producing both cosmetic and structural damage to the facilities.

In the prior art, shower enclosure walls were used as mounting surfaces for shower heads. Frequently, the wall must be reinforced either directly by increasing the wall strength or indirectly, by abutting the wall of the enclosure against a wall of the cell area, to carry the weight of a mature human being in the event that he places his full weight thereon. In penal facilities, where portable shower enclosures, such as hereinbefore and hereinafterwards are described, find widespread use and application, it is not unusual for an inmate to place his full weight on the shower head by hanging thereon. It should be remembered that penal institutions have unique problems. These are the only institutions whose occupants spend most of their time figuring out how to destroy, damage or render inoperative, plumbing facilities, fixtures, accessories and the like.

Further, the distance between the floor and the shower receptor should be minimized both to reduce the weight and cost of the enclosure and to lower the center of gravity of the entire structure in order to increase its stability.

Generally, the anchoring bolts or threaded rods used in the prior art are formed of strong, but inexpensive, metals, such as non-stainless steel. Stainless steel, although more desirable due to its non-rusting qualities, is not generally used due to its high cost. Consequently, such removable anchoring devices must be "capped" with water-tight security caps which are incapable of being removed without special tools.

Drain pipe odors should be isolated from the users side of the shower enclosure by means of a water plug seal, such as effected by a "P" trap. In order to minimize the amount of drain pipe surface likely to harbor odorcausing bacteria which is exposed to the cell area, the "P" trap should be located immediately beneath the shower drain opening, and not in the pipe chase.

The size of the shower enclosure is often reduced to minimize both the weight and the cost of the enclosure. Consequently, the enclosure volume is generally found to be too small to conveniently permit the user to towel dry within the enclosure. In addition, following a shower, a significant amount of water vapor is contained within the enclosure; in fact, this is one of the primary features of the shower enclosure; that is, to contain this water vapor. Consequently, to reduce the amount of time necessary to towel dry a splash receptor is placed on the floor adjacent to the entrance to the enclosure and is detachably connected thereto. A plumbing drain receptacle and pipe is provided to allow shower water which is drained from the user into the splash receptor to flow into the water drain system of the shower enclosure. Splash receptors found in the prior art were difficult to align with the drain connection to the lower portion of the shower because the drain connection utilized a threaded, rigid fluid connection thereto. Further, the drain outlet of the prior art splash receptors were plumbed so that the fluid drained onto the shower receptor. This not only is unsightly and unsanitary but also requires that the drain system of the splash receptor be disposed above the inlet of the drain in the shower receptor. This, of course, requires that the floor of the splash receptor be disposed at a higher elevation than the floor of the shower receptor, and sloped towards the shower receptor. Therefore, the user must step up to the splash receptor floor when moving from the shower receptor to the splash receptor and to step down when moving from the splash receptor to the shower receptor. On wet surfaces it is generally conceded that it is desirable to maintain the floors at the same height and with a minimumly sloped surface, or better yet, a non-unidirectional sloped surface, in order to reduce the chance of slipping and falling causing the user to be injured.

Therefore, it may be seen that the combinations found in the prior art offered little in the way of integration of these long-needed security features and/or elements into a combination plumbing fixture, and, in fact, in most cases it has heretofore not been feasible or practical, in view of the diversity of elements and/or features, to be combined.


The present invention represents a combination plumbing fixture comprising a tamper-proof shower enclosure with the provision of being detachably connected to a splash receptor. Basically, it is a combination plumbing fixture having a unitary shower enclosure with a single entrance thereinto for users thereof and a showerhead mounted on the hollow frame of the shower entrance. Provisions are made so as to make the shower enclosure, as desired, mateable with a removable, self-aligning interconnecting splash receptor for the user to stand on while drying outside of the shower enclosure. The shower head is located on the inside of the hollow frame entrance to the shower enclosure so that the shower spray is directed into the enclosure rather than towards the entrance. All plumbing, both drain and water supply piping, is hidden within the enclosure without the use of large, removable access panels which must be opened to the users side of the enclosure for servicing of the piping found therebehind. Both the enclosure and receptor are anchorable to the floor by means of threaded anchoring devices concealed therein by waterproof security caps which cannot be removed from the users side of the enclosure or receptor without the use of specially designed security tools. All plumbing pipes are run underneath the shower receptor into a single aperture in the pipe chase wall. A combination "P" trap and vertically adjustable support is disposed beneath the shower receptor for support thereof. When incorporated, the splash receptor drains directly into the "P" trap of the shower.

Shower controls, shower enclosure vent, a bar soap dish or liquid soap supply are mounted through the enclosure walls abutting the walls of the pipe chase.


FIG. 1 is a front elevational view of the shower enclosure with the detachably removable splash receptacle connected thereto.

FIG. 2 is a side elevational view of a section of FIG. 1 taken along plane 2--2 showing how the shower and splash receptor are detachably interconnected.

FIG. 3 is a bottom view of the shower enclosure.

FIG. 4 is an elevational view along plane 4--4 of FIG. 3 of the outlet end of the combination "P" trap and vertically adjustable receptor support, with a fragmentary section of the upper portion thereof.

FIG. 5 is an end elevational view of the detachable splash receptor taken along plane 5--5 of FIG. 4 showing the alignment and locating pins and the drain outlet thereof.

FIG. 6 is an isometric assembly view of the self-centering drain connection means for detachably connecting the drain outlet of the splash receptor to the drain of the shower enclosure.

FIG. 7 is a vertical section of security and fluid-sealing cap for the recessed threaded rods which anchor the bottoms of the shower enclosure and the splash receptor to the floor and of the special tool for removing the cap.

FIG. 8 is an enlarged fragmentary section of the hollow frame of the shower entrance with the shower head mounted thereon with the water supply piping connected thereto.

FIG. 9 is a fragmentary plan view of the removable cap shown in the upper portion of FIG. 8, and more particularly in FIG. 1, along plane 9--9.


Referring now to the drawings, and particularly to FIG. 1, an improved plumbing fixture combination comprising a unitary, portable shower enclosure 12 and a detachably connectable splash receptor 83, according to this invention, is generally denoted by the reference numeral 10. While the shower enclosure 12, and in fact the entire combination plumbing fixture 10, can be readily constructed of any durable material depending on the application and use intended, it has been found that when the present invention is intended for use in a penal or public institution where a trouble-free, rugged combination plumbing fixture is required, that preferably such a fixture as the present invention be fabricated primarily of the stainless steel. The many fine characteristics of stainless steel and its inherent aesthetic qualities when textured or polished, lend themselves to its use in this regard. But the primary reason for its use in the fabrication of such fixtures is its non-corroding and/or non-rusting qualities.

Referring again to FIG. 1, and now also to FIG. 3, the unitary shower enclosure, which is generally identified at 12 and shown in this particular embodiment, has a pair of vertical walls 14, 16 oppositely disposed and which are rigidly disposed in a substantially parallel spaced relationship along the rear vertical edges thereof by yet another vertical wall 18 which forms the rear of the shower enclosure 12 and is disposed in a substantially perpendicular relationship to walls 14, 16.

The rear wall 18 is abutted against the pipe chase wall 81 and is secured thereto by means of threaded rods or bolts (not shown) which are passed through the wall 81 and threadably anchored to nuts (not shown) welded to the rear of wall 18. Generally, the nuts may be welded to any portion of the rear of the wall 18. However, it has been found that these are preferably four in number and are welded along a rectangular pattern near the four corners of the aperture in the wall through which the soap dish 20 is disposed and welded.

In placing the recessed soap dish 20 adjacent to the fluid control valve 22, only a single hole in the pipe chase wall 81 is required to accomodate both the soap dish 20 and the control valve 22. This, of course, reduces the cost of installation of the combination plumbing fixture 10.

Shown mounted on the rear wall 18 is a bar soap dish 20, a pushbutton control valve 22 for controlling the water supply to the shower enclosure 12, and vented area 24. The vented area 24 serves to vent the water vapors which accumulate during showering into the pipe chase area behind the mounting wall 81. In so doing, the water vapors which promote oxidation and/or corrosion of steel bars and security fixtures typically found in penal facilities are directed into a concealed area; namely the pipe chase area where the steel pipes are coated to prevent rusting or where such deterioration can be more easily controlled and contained.

The front of the shower enclosure is rimmed by a hollow frame, generally designated at 26, formed by a pair of pilasters 28, 30, a horizontal cross-member forming a brace 34 joining the top end portions of the pair of pilasters 28, 30. The tops of the pilasters 28, 30 are capped by detachable stainless steel plates similar to the cap 112 shown in FIG. 9 capping the top of pilaster 30. The cap 112 is removable only by authorized persons using a special security tool as hereinafterwards described. Having a removable cap such as 112 is necessary in order to install the showerhead and to permit maintenance and repair of the showerhead 57, shown in FIG. 8, and its associated piping.

The top of the shower enclosure 12 is capped by a roof member 36 which is welded or brazed to the inner periphery of the opening formed by the walls 14, 16, 18 and the cross brace member 34.

As shown in FIGS. 2 and 4, the bottom section of the shower enclosure 12 is enclosed by means of a water receptor 38, the surface of which slopes downwardly towards the central portion thereof. Substantially in the center of the receptor 38, a series of small aperatures are formed to serve as a strainer 40 to prevent the passage of solid objects into the P-trap 42 which might serve to block the passage of fluid therethrough. It should be noted that the small aperatures are formed by perforating the receptor 38, rather than by the use of the usual separate strainer which is detachably connected to the receptor 38. By forming the strainer 40 as an integral, non-removable part of the receptor 38, the strainer 40 is rendered tamper-proof; an important requirement in the use of the present invention in penal facilities.

On the underside of the receptor 38 and disposed directly beneath the strainer 40 portion thereof is a combination "P" trap and support member 42 for the receptor 38. The function of the "P" trap is well known in the art and operates to prevent odors from passing back through the drain piping 44 and into the shower enclosure 12 and thereafter into the area wherein the shower enclosure 12 is disposed.

Another important function of the "P" trap and support member 42 is to serve as a central support for the shower receptor 38. Generally, the receptor 38 is also formed from stainless steel sheet metal similar to the rest of the shower enclosure 12. The weight of a human being on the shower receptor 38 requires that the receptor be supported in order to prevent unwanted deformation of the preshaped self-draining receptor 38 surface. Such deformation could produce pooling of the water delivered to the shower enclosure and reduce or eliminate the self-draining feature of the shower receptor 38. Further, such support is virtually a necessity when such a shower enclosure is used in a penal institution as the inmates or occupants thereof are likely to jump up and down on the shower receptor 38 to attempt to damage it or to "test" its ability to withstand such abuse.

In addition to its new and useful purpose, the "P" trap 42 serves as a vertically adjustable device for varying the distance between the floor 48 and the underside of the receptor 38 in order to provide proper support therefor. This is accomplished by means of at least two horizontal fingers 46, 50 having at least one perforation in each of the fingers for receiving the threaded shanks of bolts 52, 54 which have nuts 56, 58 threaded thereon. By abutting the heads of the bolts 52, 54 to the floor 48 and adjusting the nuts 56, 58 upwardly until the fingers 46, 50 are contacted thereby, the fingers will then be supported thereon and, in turn, supported by the bolts whose heads are resting on the floor.

The upper portion of the "P" trap 42 designed to receive the water from the strainer 40 of the receptor 38 is generally designated at 60 and comprises a funnel-like receiving section 62, apertured finger members 64, 66, 68, 70, and a flange 72 with an annular groove 74 therein for receiving an annular fluid-sealing member 76, such as an O-ring.

Four nuts (only two of which are shown 78, 80) are welded to the underside of the shower receptor 38, the centers of which are substantially aligned with the centers of the aperture of fingers 64, 66, 68, 70. Bolts 79, 81 (the two other bolts are not shown) are received into the aperture of fingers 68, 70, respectively, and threadably engaged into the nuts 80, 78 welded to the receptor 38. As the bolts are tightened, the fingers of the "P" trap and support member 42 are urged towards the bottom of the shower receptor 38. In so doing, the flange 72 with the annular fluid sealing member 76 disposed within the annular groove 74 is, in turn, urged into intimate abutment about the perforations in the receptor 38 which form the strainer portion 40 therein, and effects a fluid seal therearound. Such a fluid seal is desired in order that during blockage of the drain system or in the event of fluid backing up in the drain, such fluid is not permitted to seep therebetween and out into the floor 48 area beneath the shower receptor 38. Since this floor area cannot be conveniently cleaned or sanitized without removing the shower enclosure from its wall attachment (as hereinafter described) and/or attachment to the plumbing without this fluid seal, if such spillage were to occur, it is highly likely that the end result would be the placement of odor-causing fluid mixture in an inaccessible area; a highly undesirable condition, and, in most cases, totally unacceptable. Three threaded bosses 82, 84, 86 are provided on the sidewalls of the "P" trap and generally disposed above the water line of the water plug-seal established on the "P" trap 42 to permit the connection of another source of draining effluent to the "P" trap 42. Generally, only one of the bosses will be used at any one time, and the others will be plugged, in fluid-sealing fashion by means of bolts threadably mated thereinto. The three bosses 82, 84, 86 are provided to conveniently permit the additional draining source to be routed directly into the "P" trap 42 from any quadrant, except, of course, the quadrant wherein the outlet of the "P" trap 42 resides.

Referring again to FIG. 2, the splash receptor 83 resides immediately outside of and adjacent to the front of the shower threshold 32 and is detachably connectable thereto. Similar to the shower receptor 38, the splash receptor 83 possesses a self-draining water receiving surface 85 comprising a generally rectangular surface which gently slopes downwardly from the vertical sides towards the central portion thereof, the central portion having a number of small perforations constituting an integral tamper-proof strainer 111.

A hollow support 88 is welded to the underside of the central portion of the splash receptor 83 in order to provide the necessary means for preventing the draining surface 85 from undergoing deformation under the weight of the user's body. A vertical slotted portion along the top of the support 88 is provided to permit the drain pipe 90 to pass through the hollow support 88 so that it can be connected to the drain receiving elbow 92. The drain elbow 92 is brazed or welded to the underside of the splash receptor 83 so that it circumferentially encompasses the strainer 111 in fluid sealing relationship thereof.

As is shown in FIG. 5, the splash receptor 82 is detachably connectable to the front bottom portion of the shower enclosure threshold 32 by means of two locating or guide pins 94, 96 fixed in their location on the splash receptor by means of angle braces 95, 97. A vertical bracket member 98 is provided for fixing the location of the drain outlet 99 with respect to the receiving drain pipe 100 of the shower receptor 38.

Two apertures (not shown) are located on the front vertical wall of the threshold 32 for receiving the locating pins 94, 96 so that the drain outlet 99 may be aligned with the inlet of the receiving drain pipe 100.

Due to the high cost of maintaining narrow tolerances for such manufactured items, alignment between the detachably connectable portions of the combination plumbing fixture 10, namely: the shower enclosure 12 and the splash receptor 83, is not, in production items, perfect. Consequently, the drain connection must be capable of coupling one to the other in spite of these relatively broad production tolerances.

Referring now to FIG. 6, a detachably connectable drain connection is shown, comprising two similar or identical receiving bodies 102, 104 having apertured radially-directed fingers 103, 105 and 106, 108 respectively at the receiving ends thereof. The apertures in fingers 106, 108 are adapted to receive threaded fasteners 15, 17 thereinto. The apertured fingers 103, 105 are similarly attached by means of similar threaded fasteners which are not shown. A pair of elongated vertical slots 19, 21 are disposed on the bracket 98 which are slightly larger in diameter than the shanks of the fasteners 15, 17. These permit the receiving body 104 to be secured to the bracket 98 and to be adjusted up or down along a vertical plane in order to properly align it with the other receiving body 102.

A pair of elongated horizontal slots 107, 109 are formed in the front wall 11 of the threshold 32 of the shower enclosure 12 and are similar to the vertical slots 19, 21 in the bracket 98 of the splash receptor 83. These slots 107, 109 permit the receiving body 102 to be adjusted either right or left along a horizontal plane in order to properly align it with the other receiving body 104.

A pipe 27 whose outer diameter is slightly smaller than the inner diameters of the ends 23, 25 of the receiving bodies 104, 102 which face each other, is provided to serve as a detachable interconnecting passageway between the receiving bodies 102, 104. In order to provide the requisite fluid seal and frictional connection between the outer surface of the pipe 27 and the inner pipe-receiving surfaces of the receiving bodies 102, 104, two annular grooves are provided around the pipe 27 adjacent to its outer ends wherein suitable fluid sealing O-rings 29, 31 may be disposed.

Referring now again specifically to FIG. 5, it should now be noted that an elastomeric cushion and fluid seal 33 is typically adhesively attached and disposed about the face of the open side portion of the splash receptor 83. This seal 33 not only provides a fluid seal provided between the splash receptor 82 and the front wall of the threshold 32 to prevent water from seeping therebetween and thereunder, but it acts to also prevent metal to metal contact therebetween. Should metal to metal contact exist therebetween, when the user's weight is shifted from the shower receptor 38 to the splash receptor 83, a vertical movement therebetween occurs which frequently produces not only an undesirable loud metallic sound but abrasive wearing as well, both of which are highly undesirable.

Typically, the bottoms of the shower 12 and the splash receptor 83 are firmly anchored to the floor 48 by means of four threaded rods, similar to that identified as 35 and shown in FIG. 2. In general, the combination plumbing fixture 10 is preferably fabricated from strong non-deteriorating stainless steel. However, threaded stainless steel rods are too expensive for anchoring purposes. Consequently, ordinary steel rods are used. In the prior art such steel rods were anchored through holes in the floors of the shower receptor 38 and the splash receptor 83. In this location the tops of such anchoring rods are virtually immersed or continually bathed in water. In addition, prior art security fasteners failed to incorporate a fluid seal to prevent the passage of water from the receptor into the area therebeneath. Should water come in contact with the steel anchoring rods, these rods would rust. In addition, an undesirable, odor-causing condition would exist in an area which is not normally accessible for cleaning and sanitation purposes. To prevent this and also the unauthorized removal thereof, the tops of these rods 35 are anchored to the shower enclosure 12 and the splash receptor 83 by means of a security cap 37. This cap 37 has a lower threaded receiving portion 39 and an annular groove 41 circumferentially disposed on the underside of the top of the cap 37 (illustrated in FIG. 7) which is adapted to receive an O-ring 43. Disposed between the periphery of the top of the cap and the groove 41 are at least two vertical bores 45, 47 extending therethrough to the underside thereof.

A special security cap installation and removal tool 51 as depicted in FIG. 7 comprising a nut-like vertical gripping surface 49 adapted to be gripped by a wrench and at least two cylindrical pins 53, 55 slightly smaller in diameter than the bores 45, 47 and set in the tool so as to be in alignment with the bores 45, 47. When the pins 53, 55 are slideably mated with the bores 45, 47, a wrench may be conveniently applied to the gripping surface 49 of the tool 51 and rotated in either direction so as to either secure or remove the security cap 37 as desired.

As clearly shown and depicted in FIGS. 1, 8 and 9, the showerhead 57 may be mounted within the shower enclosure anywhere on the hollow frame 26 but is preferably mounted to one of the pilasters 28, 30. By mounting the showerhead near the top of either pilasters 28, 30 the showerhead 57 can be secured thereto by means of two threaded fasteners 59, (the other fastener is not shown, but is located on the other side of the inlet to the showerhead 57 in substantial symmetrical relationship to fastener 59) from the backside thereof. The showerhead 57 is anchored preferably near the top of either hollow pilaster 28, 30 for numerous reasons. One reason is that this location places the showerhead 57 above, at least a substantial portion of, the user's body for showering purposes. Another important reason for this location is that in order to anchor the showerhead 57 to the hollow pilaster from the inside of the pilaster, access thereinto is provided by the opening 13, as shown in FIG. 9, and located on top of the pilaster. Following installation of the showerhead 57 to the pilaster, a cap member 112 is fastened thereto by means of security caps 113, 113a which are similar in construction to security cap 37, except that caps 113, 113a have threaded male shanks instead of the threaded female shank 39 of cap 37. The shanks of caps 113, 113a are passed through appropriate perforations, diagonally disposed, in cap member 112 and threadably secured to bracket members 114, 114a which are welded to the inside wall of the hollow pilaster. Or, if desired, the cap member 112 may be simply tack welded to enclose the top of the pilaster in a tamper-proof fashion and rendered removable only with the proper tools from the edges of the pilaster to provide access to the rear of the showerhead to effect maintenance and repair thereof.

Referring also now to FIG. 8, in order to ensure the tamper-proof quality of the structure, the water supply pipe 63 is routed inside of the hollow pilaster down to the underside of the shower receptor 38 and into the pipe chase area via the wall aperture 65 as clearly shown in FIGS. 2 and 3. Not only does this conceal the water supply piping 63 from the user of the shower enclosure, but in the event that a leak should develop the water from the leak will be channeled down the length of the pilaster and onto the floor underneath the shower receptor 38 and into the pipe chase via the wall apertures 65. Because of this possibility it is sometimes desirable to place a fluid sealing gasket (not shown) about the rim of the bottom portion of the shower which is defined by the bottom edges of the walls 14, 16 and 18 and the bottom edge of the threshold 32 which abutts the floor upon which the shower enclosure 12 is typically placed.

The nozzle 67 of the showerhead 57 is threadably secured to the showerhead body 69. An annular groove 71 about the nozzle body separates that portion of nozzle 67 which is exposed to the inside of the shower enclosure 12 from the threaded, non-exposed portion. When the nozzle 67 is threadably secured within the body 69, the groove 71 is aligned with and intersects the threaded bore 73 in the body 69 and exits only to the rear portion of the body 69. A set-screw 75 having a pointed end portion 77 is threadably mated with the bore 73 and secured so that the pointed portion 77 substantially protrudes into the groove 71. Not only does the set screw 75 tend to and/or prevent rotation of the nozzle 67 but in the event that such rotation should nevertheless occur, the threads of the nozzle 67 will be forced against the set screw 75 and thereby prevent the nozzle 67 from being withdrawn or detached from the body 69, thereby rendering said nozzle tamper-proof.

While it will be apparent that the embodiment of the invention herein disclosed is well calculated to fulfill the objects of the invention, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope or fair meaning of the subjoined claims.