Title:
Plumbing fixture
United States Patent 2344150


Abstract:
The present invention relates generally to improvements in the art of liquid distribution, and relates more specifically to improvements in the construction and operation of back-flow or backsiphonage preventers for plumbing systems or the like. An object of this invention is to provide an...



Inventors:
Judell, Julius S.
Application Number:
US40784741A
Publication Date:
03/14/1944
Filing Date:
08/22/1941
Assignee:
MILWAUKEE FLUSH VALVE COMPANY
Primary Class:
Other Classes:
137/533.11, 137/603, 236/93R, 239/571, 239/588
International Classes:
E03C1/10
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Description:

The present invention relates generally to improvements in the art of liquid distribution, and relates more specifically to improvements in the construction and operation of back-flow or backsiphonage preventers for plumbing systems or the like.

An object of this invention is to provide an improved plumbing fixture assemblage which is simple and compact in construction, and which is moreover safe, sanitary and efficient in operation.

Serious difficulty has heretofore been encountered in the plumbing art, due to so-called backflow or back siphonage through certain types of plumbing fixtures, whereby contaminated and impure liquid was permitted to enter fresh water distribution pipes or systems. Such action may take place in various types of liquid supply devices the outlet or delivery ends of which may at times be submerged, such as direct flushing valves, underrim water supply connections to a plumbing fixture or receptacles wherein the water surface is exposed to atmosphere, and hose and spray fittings. While it is a relatively simple matter to obviate back-flow or back-siphonage in fixtures having fixedly located liquid supply valves and dispensing nozzles, by merely providing a sufficient air gap between the discharge orifice of the delivery spout or nozzle and the flood level rim or overflow of the basin or receptor for the liquid; the problem becomes far more complicated when the position of either the supply valve or of the nozzle discharge orifice, is variable in vertical location so that this orifice may at times be immersed in the liquid of the receiving basin, as in the case of a hose and spray fitting. In such fixtures the spray nozzle or head may be permitted to lie in the bottom of the liquid filled receptacle, when the supply of fresh liquid from the control valve or valves is interrupted, and back-flow may then occur.

It is therefore a more specific object of the present invention to provide improved instrumentalities for positively preventing back-flow or back-siphonage in hose and spray nozzle plumbing fixtures wherein the liquid delivery orifice of the nozzle may at times be immersed in liquid.

Another specific object of the invention is to provide an improved back-flow preventer of the type whose performance depends upon the automatic mechanical operation of relatively simple movable parts disposed wholly within the fixture with which the device is associated.

A further object of my invention is to provide an automatically functioning back-flow prevention device, especially adapted for cooperation with a sink fixture having one or more stationarily mounted water supply valves for delivering liquid to a universally movable spray head or nozzle through a flexible tube associated with rigid conduit sections or portions of the valves and nozzle.

Still another specific object of the present invention is to provide various improvements in the construction and operation of liquid dispensing fixtures of the adjustable nozzle type, whereby the cost of construction is reduced to a minimum, while the utility and efficiency thereof are enhanced to a maximum.

These and other specific objects and advantages of the improvement will be apparent from the following detailed description.

A clear conception of an embodiment of the invention, and of the mode of constructing and of utilizing sink fixtures built in accordance with the improvement, may be had by referring to the drawing accompanying and forming a part of this specification wherein like reference characters designate the same or similar parts.

The single figure is a part sectional front elevation of a spray and hose sink fixture embodying one type of the improved back-flow preso venter, and showing the same applied to a fragment of a sink.

While the invention has been shown and described herein as having been specifically applied to a special type of sink fixture having two fixed liquid supply valves adapted to deliver liquid mixture through a hose to a universally movable spray-spout nozzle, it is not my intention to thereby unnecessarily restrict the scope or utility of the improvement; and the term "nozzle" as used herein is intended to define any kind of liquid dispensing means such as a discharge spout, adjustable or non-adjustable spray head, or the like.

Referring to the drawing, the improved plumbing fixture shown therein comprises in general, a pair of laterally spaced normally stationary and concealed liquid supply valves 7, 8 secured to the rear ledge of the sink 9 or other receptacle by means of clamping nuts 10 and each communicating with an independent inlet pipe 11 and with a common rigid J-shaped discharge conduit 12 firmly interconnecting the two valve casings 13; a universally movable spray-spout liquid dispensing nozzle 14 having one end proi5 vided with a manually adjustable disk 15 for converting the discharge orifice 16 from a spray to a jet deliverer, or vice versa, while its opposite depending end 17 is formed for pivotal and detachable association with a fixed pivot bushing 18, the nozzle orifice 16 and pivot end being connected by a rigid conduit 19 which is covered by an insulating handle 20; a flexible tube or elongated hose 21 extending through thgh he pivot bushing 18 and normally confined beneath the sink 9, and having its opposite ends connected 1 respectively to the conduits 12, 19; and a gravity actuated back-flow preventing non-return check valve 22 interposed in the rigid lower outlet portion 23 or shorter leg of the J-shaped conduit 12, between the valves 7, 8 and the hose 21. 1 The liquid supply valves 7, 8 have their casings 13 so interconnected by the rigid mixing conduit 12, that this conduit as well as the valves may be disposed beneath the ledge of the sink 9 and concealed thereby; and the valve casings 13, conduit 12, and lower central portion 23 may all be formed of an. integral casting. Each of the improved supply valves 7, 8 comprises a vertically adjustable valve body or plug 24 cooperable with an annular seat 25 secured within the casing 13, and having an actuating stem 2S coacting with a sealing device 27; and an actuating handle 28 detachably secured to the upper extremity of the stem 26 by means of a screw 29, and having an escutcheon cap 30 firmly attached thereto. Each valve plug 24 has external screw threads 3 coacting with internal threads of its casing 13, so that when the valve stem 26 is rotated with the aid of its handle 28, the corresponding plug 24 will move toward or away from its seat 25 depending upon the direction of rotation. The handles 28 may be marked as shown, in order to indicate the: character of the liquid controlled thereby; and the escutcheon cups 30 may be formed of the same material as the nozze hle handle 20, and serve to normally conceal the sealing device 27 while permitting convenient access thereto.

The improved spray-spout liquid dispensing nozzle 14 is adapted to be moved vertically and laterally in any direction, by virtue of its connection to the flexible hose 21, when the nozzle has been removed from the pivot bushing 18 as illustrated; and the jet regulating disk 15 has an integral adjusting stem 32: provided with screw threads 33 coacting with the nozzle casing 34, and provided with a manipulating cap 35, so that rotation of the. cap 35, stem 32 and disk 15 will convert the delivered liquid either from a spray into a solid annular jet, or vice versa, depending upon the direction of rotation.

The nozzle 14 is however, also adapted to be utilized as a swing spout when the cylindrical rear depending pivot end portion 17 thereof is inserted within the pivot bushing 18. The bushing 18 is fixedly secured to the sink 9 midway between the valves 7, 8, by means of a clamping ring 36; and the nozzle portion 17 may be provided with one or more notches 37 which are cooperable with a fixed pin 38 secured to the bushing 18 so as to positively prevent the nozzle 14 from swinging out of the sink basin 39 when the nozzle assemblage is being used as a fixed or swing spout. The notches 37 may be elongated so as to permit limited lateral swinging of the nozzle 14, or several notches 37 which snugly engage the pin 38 may be used in order to positively fix the nozzle in any one of several predetermined positions.

The improved back-flow preventer shown and which comprises the gravity actuated ball check valve 22, is disposed directly between the conduit portion 23 and the inlet end of the hose 21. This non-return check valve 22 may be confined within a fitting 40 to which the inlet end of the hose 21 may be attached by means of a union 41, and this fitting 40 may also be provided with a closure cap 42 having a stop pin 43 thereon for prevent0 ing the ball valve 22 from closing off communication to the hose 21 when the non-return check valve is lifted from its seat by liquid under pressure issuing from the conduit portion 23. The cap 42 is removable so as to permit ready access 5 to the ball valve 22, and the delivery end of the hose 21 may be connected to the nozzle portion 11 by means of another union 41.

The normal operation should be clearly apparent from the foregoing description, and it will Sbe noted that the non-return check valve 22 will permit liquid under pressure to flow freely from either or both valves 7, 8 to the nozzle orifice 16, but will positively prevent back-flow or backsiphonage of liquid from the orifice IG to either of the valves 7, 8.

The improved fixtures are obviously simple and compact in construction, and are also devoid of unsightly exposed parts. such as valve bodies, conduits and packing elements. The valve bodies 13 and fixed connecting-conduits are all permanently concealed beneath the sink 9; and when the convertible nozzle is being used as a spout, the flexible hose 21 is also concealed. The supply valves 7, 8 ae re extremely simple and compact in construction, yet highly effective in use, and the structure is also simplified and improved in appearance by attaching the escutcheon caps 30 directly to the handles -28. The appearance of these fixtures is also improved by. forming the escutcheon caps 30 of the same colored material used as an insulating handle, 20 for the nozzles, and these nozzles are readily convertible from a spout into a universally movable spray or rinser, and from a spraying fixture into a jet delivering device. The present improved fixtures can be manufactured and sold at moderate cost, may be quickly and conveniently installed, and the improved back-flow appliances can also- be readily applied thereto at little expense.

It should be understood that it is not desired to limit this invention to s the exact details of construction, or to the precise mode of use, herein shown and described, for various modifications within the scope of the claim may occur to persons skilled in the art.

I claim: In a plumbing fixture, a pair of liquid supply valves interconnected by a rigid conduit having a rigi sd J-shapedtube depending therefrom and G6 providing a single outlet between the valves, a universally movable rigid liquid mixture dispensing nozzle adapted to be positioned above and below said valves and having an inlet connected to the shorter leg of said J-shaped tube below G6 the upper extremity of said leg by, a flexible hose, a gravity actuated non-return bail check valve located in said shorter rigid tube leg below and in advance of the inlet end of said flexible hose for positively preventing back-flow of liquid from said nozzle and hose to either of said valves through said conduit,, and a removable cap normally closing said upper end and being cooperable with said check valve to prevent its sealing the adjacent end of said hose.

- - . .: .. JULIUS S. JUDELL.