Title:
Pressure fluid servomotor
United States Patent 2468943


Abstract:
1' This invention relates to -regulator mechanism1 for windows, of vehicles such', for example, as: automobiles, in- which the window is mounted: for-swinging movement; but-more particularly to ventilating wings-or vanes such as are. mounted on- automobile doors on an up and down axis to swing...



Inventors:
Parsons, John R.
Application Number:
US59457745A
Publication Date:
05/03/1949
Filing Date:
05/18/1945
Assignee:
Parsons, John R.
Primary Class:
Other Classes:
49/334, 92/107, 92/130R, 92/177, 188/152
International Classes:
E05F15/04; F15B15/08
View Patent Images:
US Patent References:
2338965Operating mechanism for ventilating wings1944-01-11
2240039Selector switch1941-04-29
1741871Automatic shade roller1929-12-31
1481568Valve grinder1924-01-22
1208115N/A1916-12-12
1072104N/A1913-09-02
0901550N/A1908-10-20
0853615N/A1907-05-14
0358977N/A1887-03-08



Description:

1' This invention relates to -regulator mechanism1 for windows, of vehicles such', for example, as: automobiles, in- which the window is mounted: for-swinging movement; but-more particularly to ventilating wings-or vanes such as are. mounted on- automobile doors on an up and down axis to swing between open .and. closed. positions so as either to deflect air inside of-the automobile; or to withdraw air from the inside of the automobile, and :an- object is to produce new andd.improved- mechanism for automatically actuating windowsiof the above type, the same constituting an improvement on the strtucture shown: and described:in ,my Patent 2;338,965 dated January 11, 1944, and-.entitled "Operating mechanism- for 15, ventilating- wings," to the end that the structure may be- manufactured more easily, the parts, being adapted for more efficient assembly;- the structure as a whole being more sturdy, positive. and reliable in performance. Other objects and advantages of the invention.: will hereinafter appear and.for purposes of illustration but not of limitation, an- embodiment of the invention- isshlown on the accompanying drawings in which: -5 Figure-i'is a fragmentary side elevation, ofthe front end portion -of an automobile showing'-the ventilating, wing, parts being broken away: to: show the regulator mechanism and the pump and connections being diagrammatically illustrated; Figure 2 'is a-.top.-plan view of the regulator mechanism. indicating by broken lines the posi-tionsto, which the ventilating vane or wing may be-adjusted:; Figure 3 isan enlarged vertical sectional eleva-tion iof.':the- regulator- and its associated electromagnetically -controlled valve; Figure .4 is a, transverse sectional. view on the lipe ; --.4 4f Figure .3; Figure 5 .is a: perspective, view, of the piston -40 body.portion; and, Figure-61is an enlarged 'fragmentary sectional view of the piston assembly and associated spring, taken on the line- 6--6ý.of Figure 4., The-illustrated, embodiment of the invention' comprises.an-automobile body 10M having a:sidedoor II provided with a window i opening 12 in which.the,-usual vertically movable window panel is.mounted. Forwardly of,:the .opening 12 and. separated therefrom by: a- vertically disposed guidebar 13 I.isa. ventilating wing orn vane- 14, which:is pivoted.-to swing about an up and downaxis,,, the.- upper- pivot- being- indicated' by,. thenumbertA 5Hand -theloower-pivot being indicated by , th'e numberA 6: Fixed to the vane-14 and·depend- 65 ing from the pivot 16 is a flat-sided post-:; whichextends between the-sides of .a yoke 18 apin-, or bolt 19 extending through registered' aperturesin the post 17 and yoke 18 for holding the parts' together. It will'be manifest that-by rotation' of the yoke 18,' the- ventilating;- wing 14 may- be swung-about its axis, as indicated by the broken· lines on Figure2.: The yoke 18 forms a part of the regulator. mechanism and as shown' on Figure: 3 is an' inr tegral part of the slotted'stub shaft 20tinto-which' the straight portion of a helical ribbon-shaft'i2-1 is securely positioned by a bolt 22. Thetrgradual": curve 23-of 'the helix is formed by twisting~ as - flat, elongate steel ribbon to the- desired- contour; the ribbon- being shown rectangular in crosssection.

Fitting, the helical -ribbon shaft 2 f is a- piston 24;' which is formed with- a slotted central -open..ing 25- conforming to the cross section- of'and" having a, sliding' fit with' the shaft' 2 so tkhatthe -piston -can move longitudinally of 'the: shaft; 21. The piston, 24-comprises a substantially rectangular-plate or body portion 24a from the under side of which depend fourintegral shouldP ered: pins- 21; A' rectangular resilient' rubber packing disc 28 'is aperturedi-to fit'over the pins 27 -and retaining the rubber disc 26rin place is -a' rectangular metallic plate 28 -which is also' apertured to fit bver the pins 2 ;the latter being upsetor-riveted :over as indicated on Figure 6 to hold' the rubber disc 26 and plate 28- in position. It will be observed-that the slot 25:in the plate 24t, is -of hour glass shape -in: cross section and' as shown in Figure: 6, registering slots are formed in-the disc 26-and plate 28: It should be noted' that the-rubber dise-26M-is so constructed andi arranged that it not:only effects a liquid tight seal' outwardly with the inner walls of the cylinder-butalso affords an- effective liquid tight seal inwardly'with the helical-shaft or ribbon 2'1.' On the-upper side -ofthe bbdy portion 248 oft the-piston-24-and at'each-corner thereof are upstanding -integral tfingers 27a, the outer surfacesof which are rounded.: Approximately midway of the length of each finger on the inside thereof is formed-'an inwardly extending shoulder 27b the: same being formed by reducing the thickness-of the metal- of the finger projecting outwardly: th'erefrom; It will be manifest, thatý the piston: 24 may be conveniently formed'by-die casting.

The piston 24 is longitudinally slidable in ann elongate sheet metal housing 29'which is-rectangular -in cross section- with the corners-thereof i rounded as indicated on Figutre 4'-and'confornxi to the curvature of the outer surfaces of the fingers 27a. The fingers 27a militate against the piston binding within the housing, insure a smooth sliding movement and also provide a mounting and enclosure for one end portion of a coil spring 30.

Manifestly the piston 24 is held against rotative movement but sliding movement thereof longitudinally of the elongate housing 29 is permitted. As a consequence, the longitudinal sliding movement of the piston 24 imparts rotative movement to the helical shaft 21 due to the cooperative engagement of these parts.

As will hereinafter more fully appear, fluid under pressure, such as a liquid, is introduced into the lower portion of the housing 29, thereby causing the piston 24 to travel upwardly within the housing 29 and impart rotational movement to the shaft 21 in one direction. It will be manifest that downward movement of the piston 24 causes rotational movement of the shaft 21 in the opposite direction. Such downward movement of the piston 24 is effected by the coil spring 30.

Integral with the stub shaft 21 and disposed a short distance below the yoke 18 is an annular collar 31 directly beneath which is another collar 3? of smaller diameter. The annular collars 3! and 32 are held between the cu-ped end plate 33 and a curved metallic plate 34 which acts as a bearing element and is backed by the end plate 33. The metallic end plate 33 serves to close the upper end of the elongate housing 29 and is securely positioned by fitting into the groove formed by crimnpng the upper end of the metallic housing 29 over the end plate .3. The upner annular coll.r 31 rides between a packing 36, which also snugly embraces the stub shaft 20 and contact the end plate 39, and a lower packing ring 3T, which embraces the lo-rer annillar collar 32 and contacts the metallic plate 34. It will be apparent that the shouldered portion of the collar 3! coonerating with the metallic end plate 33 and plate 34 provides a thrust bearing for the shaft 2 sand serves to retain the shaft in the desired position.

"'e lower nortion of the casing 2?. extenls downwardly below the lower end of the shaft 21, and rmounted therein is an electromag!etiaelly controlled valve assembly 38, which includes a solenoid 39 within which is disposed a valve member 40 which is normally urged upwardly to its seat by a coil spring 41, a portion of the latter being disposed within a sleeve 42. The arrangement is such that upon energizing the solenoid coil 39, the valve member 40 is moved downwardly, tensioning the spring 46 and enabling the fluid under pressure to flow therethrough to the piston 24. When the solenoid coil 39 is deenergized, the coil spring 41 moves the valve to its seat. thereby trapping the fluid within the casing 79 and retaining the shaft 21 in its adjusted position. Thus upward movement of the piston 24 is effected by the introduction of the fluid under pressure to the casing 29.

When it is desired to effect movement of the vane 14 in the opposite direction, the solenoid coil is energized but the source of pressure fluid is inoperative, thereby enabling the coil spring 30 to force the piston 24 downwardly and effecting a reverse rotation of the shaft 21. Thus, it will be manifest that the valve 40 serves both as an inlet valve to admit fluid under pressure for actuating the piston in an upward direction and also as an outlet valve through which fluid is expelled from the cylinder upon downward movement of the piston in response to the expanding force of the coil spring. A still further advantage of the valve 40 is that it serves automatically to relieve pressure in excess of a predetermined maximum within the cylinder. Thus, in the event of expansion of the pressure fluid within the cylinder and beneath the piston, for example when the wing or vane is in closed position, the pressure so built up will unseat the valve 40, thereby relieving the pressure and militating against injury or damage to the regulator parts.

The extreme lower end of the casing 29 is closed by an end plate 43, which is held in place by crimping the end 44 of the casing 29 about the end plate 43, which at its inner section seats onto a shoulder in the sleeve 42. The sleeve 42 is drilled for fluid passage and pipe connections 45. Detailed description of the source of pressure fluid is not considered necessary. Suffice it to say that a motor pump unit 48 containing its own fluid reservoir forces fluid such as oil under pressure through a tube 47 to the sleeve 42, the tube 47 also serving as a return line to enable fluid from the casing 29 to return to the reservoir. A switch 48 is indicated, one lead 49 therefrom extending to the solenoid coil 39, another lead 50 extending to a relay for controlling the unit 46, and a third lead 5 extending to a battery B or source of electrical current. The switch may assume the form as shown and described in my Patent 2,344,452, dated March 14, 1944, and is such that either the solenoid 39 may be energized alone, or the solenoid 39 and the pump unit 46 simultaneously may be operated, depending on the manner in which the switch 48 is actuated.

It is to be understood that numerous changes in details of construction, arrangement and oneration may be effected without departing from the spirit of the invention especially as defined in the appended claims.

What I claim is: 1. A fluid pressure servo-motor comprising an elongate casing rectangular in cross section with the corner portions thereof rounded, a piston conforming substantially to the cross section of said casing and mounted therein for reciprocatory movements, said piston comprising a body portion shaped to fit within said casing, fingers extending from the corners of said body portion with the outer surfaces thereof rounded to conform to the rounded corners of said casing, pins projecting from the opposite side of said body portion, a resilient rubber disc apertured to fit said pins, means to hold said disc in place against said piston body portion, a shaft adapted to be operatively connected at its outer end to the work and projecting inside of said casing, an elongate helical actuating element on said shaft for rotation therewith, said piston having a slot fitting said actuating element whereby longitudinal movement of said piston imparts rotary movement to said shaft, a mounting within said casing for said shaft for holding same against axial movements, and means for effecting piston movement longitudinally of said casing.

2. A fluid pressure servo-motor comprising an elongate sheet metal casing rectangular in cross section with the corners thereof rounded, a piston conforming substantially to the cross section of said casing and mounted therein for reciprocatory movements, said piston having a body portion having a slot of hour glass shape in cross section, fingers rising from the corners of said body portion respectively and shaped on the outside thereof to conform to the curvature of the corners of said casing, pins depending from said body portion, a resilient rubber disc having a slot registering with the slot in said body portion, and apertured to fit said pins, a plate having a slot registering with the slots in said body portion and disc and apertured to fit said pins, the outer ends of said pins being upset to hold the parts in place, a stub shaft mounted at one end of said casing and having a portion projecting outwardly thereof for connection to the window panel, and a yoke portion projecting inside of the casing, an elongate ribbon-like helical actuating element fitting said registering apertures in the piston body portion, disc and plate, means for clamping one end portion of said actuating element between said shaft yoke, a thrust bearing for said shaft, and a coil spring within said casing and having one end portion bearing against said piston body and disposed within said fingers.

3. A fluid pressure servo-motor comprising an elongate casing polygonal in cross section, a piston conforming substantially to the cross section of said casing and mounted therein for reciprocatory movements, a shaft adapted to be operatively connected at its outer end to the window panel and projecting inside of said casing, an elongate helical actuating element on said shaft for rotation therewith, said piston including a rubber disc providing outwardly a liquid-tight seal with the casing walls and inwardly a liquid-tight seal with said actuating element, and means for effecting piston movement longitudinally of the casing.

JOHN B. PARSONS.

REFERENCES CITED The following references are of record in the file of this patent: 15 UNITED STATES PATENTS Number 358,977 853,615 901,550 1,072,104 1,208,115 1,481,568 1,741,871 2,240,039 2,338,965 Name Date Joyner ------------- Mar. 8, 1887 Ageron ------------ May 14, 1907 Nicholson ---------- Oct. 20, 1908 Ebersole -----------Sept. 2, 1913 Eynon -------------Dec. 12, 1916 Smith ------------- Jan. 22, 1924 Mitchell ----------- Dec. 31, 1929 Hickman ---------- Apr. 29, 1941 Parsons ----------- Jan. 11, 1944