US 2762422 A
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Description (OCR text may contain errors)
Sept 11, 1956 M. sTRATToN 2,762,422
HYDRAULIC OPERATED BED CHAIR Filed sept. 21, 1955 2 shees-sheet 1 ATTORNEYS Sept. l1, 1956 M. sTRATToN HYDRAULIC OPERATED BED CHAIR 2 Sheets-Sheet 2 Filed Sept. 21, 1955 Mary Siraan INVENTOR ATTORNEYS United States This invention relates to a hydraulically operated bed chair, and has as its primary object the provision of a device of this character which may be readily adjustable as to the body supporting members such as the foot and back rest, :and further wherein the seat member may be adjusted to various heights as desired.
A further object of this invention is the provision of such a device wherein the adjustments may be made with a minimum of effort and diiculty.
Still another object of the invention is the provision of such a device wherein the seat is operated by means of a hydraulic ram, so that the same may be adjusted while the weight of the patient rests thereon with a minimum of effort.
Still another object of this invention is the provision of such a device wherein the back rest may be moved to a horizontal position whereby the patient may rest in a reclining position.
Still other objects reside in the combinations of elements, arrangements of parts, .and features of construction, all as will be more fully pointed out hereinafter and shown in the accompanying drawings wherein there is disclosed a preferred embodiment of this inventive concept.
ln the drawings:
Fig. l is a side elevational view of the device, various positions of adjustment being indicated by dotted lines.
Fig. 2 is a top plan view of the device, certain concealed portions thereof being indicated by dotted lines, and
Fig. 3 is a front elevational View of the device, various positions of adjustment, and certain concealed portions thereof, being indicated by dotted lines.
Similar reference characters refer to similar parts throughout the several views of the drawings.
Having reference now to the drawings in detail, the device of the instant invention is comprised of two oppositely disposed side members generally indicated at 10, each of which consists of a horizontal side bar 11 4and front and rear legs 12 and 13 respectively, transverse bar members 14 connect the horizontal portions 11 at spaced intervals. Each of the side members is provided with a U-shaped arm rest member 15, integrally connected as by welding or the like to .the extremities of horizontal portion 11.
Centrally located between the side portions 10 is a hydraulic ram cylinder 18.
Cylinder 18 is connected to and supported by four diagonally disposed members 19, two of which are secured at their outer extremities to the lower portions of front legs 12, and the other two of which lare secured at their outer extremities to the lower portions of rear legs 13. Each of members 19 extends into a suitable sleeve 20 xed to the bottom of ram cylinder 18, and is held in position by a setscrew or cotter pin 21 or similar device as may be desired.
Hydraulic cylinder 18 contains a piston 22, which supports at its end a seat member 23, the latter being adapted arent to be raised from the full line position shown in Fig. 1 to the dotted line position 1shown therein in accordance with fluid pressure exerted on the piston within the cylinder 18. Fluid pressure for the hydraulic mechanism may be supplied from any desired source (not shown) through fluid tubes 24, one of which may serve as a supply line, and the other as an exhaust line.
The lower ends of rear legs 13 are vertical as indicated at 25, and are provided with fixed castor wheels 26 mounted in suitable ball bearing journals 27.
In a similar manner the lower portions of the front legs 12 are vertically positioned as indicated at 28, and have mounted therein rotatable castor brackets 29, which in turn support the castor wheels 30 in -ball bearing journals 31, the arrangement being such that the assembly may be moved from place to place with a minimum of effort and difficulty.
Control of the admission of hydraulic iluid to cylinder 18 is effected by means of any suitable control lever 32.
The device is provided with a foot rest member 35, the latter being carried by two oppositely disposed horizontal rods 36, which extend into tubular cylinders 37, which cylinders are mounted on the transverse crossbar 38 connecting the lower extremities of the front legs 12, Vand the adjacent diagonally disposed members 19. Suitable hand operated setscrew members dit .are provided for securing the rods 36, and hence the foot rest 35 in a desired position of adjustment relative to the main frame.
if desired the connection between the rods 36 and foot est 35 may take the form of pivot pins 41, although this may be a fixed connection if preferred.
An adjustable back rest is also provided, and takes the form of a tubular U-shaped bracket 45, between the legs of which is supported a back rest cushion 46. The ends of the legs of member 45 are pivotally connected as at 47 to oppositely disposed L-shaped brackets 48 which in turn are iixedly secured to the upper extremities of legs 49.
Adjustment of the back member 45 is secured by means of rods 50 each secured as by means of a pivotal connection 551 to an intermediate portion of the opposite legs of U-shaped member 45. The lower extremities of the rods 5t? extend into tubular members 52, which in turn are pivotally mounted at their opposite extremities 53 at points adjacent the lower extremities of the rear legs 13, and yadjacent the rear crossbar 54. The rods 5t? may be held in extended or retracted position as by means of setscrews 5S or the like.
From the foregoing the operation of the device should be readily understandable. When it is desired to raise or lower the seat 23 the hydraulic mechanism is actuated by means of the lever 32 to admit or release fluid from the cylinder 18 as desired.
The `angle of the back rest 45 may be readily adjusted by releasing setscrews 55, arranging the back rest at the desired angle, and retightening the screws. Similarly the spacing of the footrest 35 may 4be effected by the release of the setscrews 4i) adjustment of the device to the desired position, and retightening the setscrews.
From the foregoing it will now be seen that there is herein provided an improved hydraulically operated bed chair which may be readily adjusted to a desired position both as to height and angular inclination, and also provided with an adjustable footrest, which accomplishes all of the objects of this invention, and others, including many advantages of great practical utility and commercial importance.
As many embodiments may be made of this inventive concept, and as many modications may be made of the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.
In a hydraulically operated bed chair the combination of a wheeled base frame comprised of side members of inverted U-shapedconstruction connected Ibytop and bottom transverse members, caster wheels carried by the lower end of each leg of each side member, diagonal members extending from a lower portion of each leg toward a central point of intersection, a hydraulic ram cylinder carried by the inner ends of each diagonal member, a piston in said ram cylinder, a seat carried by said piston for vertical movement thereby, an adjustable back rest pivotally mounted on said frame, an adjustable foot rest mounted on said bottom transverse member, and
mechanism for adjusting said back rest comprising rods pivotally secured to an intermediate point on opposite sides of said back rest, tubular members pivotally connected to the lower portions of the rear legs of said side members into which said rods extend and setscrew means securing said rods in a desired position in said tubular members, wherein horizontal parallel tubular members are secured to the forward end of said frame, said foot rest being provided with rods slidably extending into said tubular members and setscrew means in said last mentioned tubular members to secure said rods and hence said foot rest in a desired position of longitudinal adjustment.
References Cited in the Ele of this patent UNITED STATES PATENTS 515,303 Rouze Feb. 20, 1894 961,715 Christiansen ..7 lune 14, 1910 1,608,848 GallOWitZ NOV. 30, 1926 1,756,756 Mitchell Apr, 29, 1930 2,609,862 Pratt Sept. 9, 1952