US2520849A

US2520849A - Variable position bed

Info

Publication number: US2520849A
Application number: US623613A
Authority: US
Inventors: Graham D Mcvicker
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-10-22
Filing date: 1945-10-22
Publication date: 1950-08-29
Anticipated expiration: 1967-08-29

Description

Aug. 29, 1950 G. D. M VICKER VARIABLE POSITION BED Filed 001;. 22, 1945 L It@ IN V EN TOR.

m K m c M D. M M m A T TORNE Y Patented Aug. 29, 1950 UNITED STATES PATENT OFFICE VARIABLE PQSITION BED Graham D. McVicker, San Diego, Calif. Application October 22, 1945, Serial No. 623,613

4 Claims.

My invention relates to a power control mechanism for variable position beds and the objects of my invention are:

-First,,' to provide a power control mechanism for variable positioned beds which will act smoothly, quietly and powerfully to adjust the bed as required by means of hydraulic mechanism;

Second, to provide a device of this character which will adjust the tiltable head rest and the adjustable knee rest independently;

Third, to provide a device of this character which can be arranged so that the patient may himself operate the device; and

Fourth, to provide a device which is simple to manufacture, easy to operate and which is sufficiently sturdy to give enduring service.

With these and other objects in view as will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of reference thereon which form a part of this application in which:

Figure 1 is a side elevational view of my invention and a variable position bed, the view being slightly diagrammatic, to show how my invention is combined with the bed and the principle of 3 operation; and Fig. 2 is a diagrammatic view of the main elements of my invention detached from the bed.

Similar characters of reference refer to similar or identical parts and portions throughout the views of the drawings.

The bed I, tiltable head rest 2, bell crank 3, link 4, adjustable knee rest 5, reservoir 6, pump 1, hydraulic cylinders 8 and 8a, swivel support 9, piston Ill and piston rod ll constitute the principal parts and portions of my invention.

The variable position bed is comprised essentially of the head upright l, foot upright la and a pair of horizontal side frame members lb which may be channelled or L- shaped in cross-section. A tiltable head rest represented at 2 is pivotally secured to the side frame members lb and a lever 2a integral with said head rest extends downwardly from the pivoted end of the head rest to a pivotal connection with the operating device hereinafter described. A bell crank 3 is pivotally secured to each of the horizontal frame members lb and a link 4 is pivotally secured to and between the bell crank 3 and the junction of the adjustable knee rest members 5 and 5 The member 5 is pivotally secured to the frame as at 50 and the free end of the member 5a is adapted to slide along the top or channel of the horizontal frame lb.

Referring now to Fig. 2, a reservoir 6, suitably vented as indicated at Go, communicates with'a pump l which will normally be electric and is connected by suitable electrical leads la to a usual source of current and conventional pump operating controls '(not shown) and this pump in turn communicates with a hydraulic cylinder 8 which is secured to the bed as at 9, Fig. l, by a swivel support 9a, the member 9a representing any suitable means of operatively mounting the reservoir, and pump adjacent said cylinder. The piston Ill and the piston rod ll complete this part of the assembly and this piston rod H is pivotally secured to the head rest lever 2a.

It will be noted that two cylinders have been shown in the drawings, the cylinder 8a and piston rod I la being operatively connected with the bell crank 3 so that the knee rest can be operated independently of the head rest.

Although not illustrated in the drawings it is obvious that if two cylinders and one pump is used a selector valve to route the hydraulic fluid to the cylinder concerned will be required. The control of the pump will also involve no invention if an electric pump is used. It is preferred, however, that the wiring of the pump control system be such that the patient himself may start, stop and reverse the pump.

Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to be limited to this particular construction, combination and arrangement but desire to include in the scope of my invention, the construction, combination and arran ement substantially as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a device of the character described, a head rest pivotally secured to a bed frame, a hydraulic cylinder havin a piston rod operatively connected to said head rest for individually op erating the same, an electric pump and a vented reservoir operatively connected to said hydraulic cylinder, a hinged knee rest, a second hydraulic cylinder and piston rod, and a bell crank pivotally mounted on said frame and operatively connected only to said knee rest and said last mentioned piston rod.

2. In a power controlled variable position bed,

pivoted to' said fraineat its bneend and having a fixed lever operating about the axis of the pivotal connection of said head rest With said frame and a second hydraulic cylinder having a plunger therein connected to said lever.

3. In a power controlled varia-ble 15csitioii-b 'f;, a bed frame, a knee rest including; two "nir iged members, one end of one of said'memb'ers being pivotally secured to said frame and the other-oi said members having its .free end in sliding contactavithsaid- "frame; a-hydraulie cylinder with a piston-'- an-d istcn rod, a bell crank pivotallymounted on said frame-andoperatively: connected to said knee rest and to said piston rod;an c1ec tric-pnmWand-a'vented reservoir operativelyrconnested tea said hydraulic cylinder, a headrest pivoted atrits one endto" said *f-rameand having afixed lever operating aboutthe: axis of -z the pivota-1-= connect-ien of said neadres-t -with said frame,- asecondhydrauliccylinderhavingr'la pls ten-rod' operatively connected tdsaidlevenandmeans mounting said'eylinders"onsaid bed-frame fonpivotakmovementabout a-common"airiss- 47 1a a pewen controlled variable position bed;-

a bed frame, a knee rest including two hinged members, one end of one of said members being pivotally secured to said frame and the other of said members having its free end in sliding contact with said frame, a hydraulic cylinder with a piston and piston rod, a bell crank pivotally mounted on said frame and operatively connected to said knee rest and torsaid piston rod, an electric pump and a vented reservoir operatively cdnireefiea ito said hydraiflic -bylinderia head rest pivotedatits' one 'end tffsaid frame and having a fixed lever operating about the axis of the pivotal connection of said head rest with said frames a second hydraulic cylinder having a piston rod operatively connected to said lever, lioth of said 'cylirfders pivoted on a common axis, bothof said cyli-nders having their piston rods extending in the same direction and a unitary mounting for both of said cylinders near one end of said bed frame.

' GRAHAM :3. M-eVIGKER:

REFERENCES" ciTED The:renoivmg rerererrees -are ofrecoi d ifi the