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Publication numberUS3392412 A
Publication typeGrant
Publication dateJul 16, 1968
Filing dateJan 12, 1967
Priority dateJan 12, 1967
Publication numberUS 3392412 A, US 3392412A, US-A-3392412, US3392412 A, US3392412A
InventorsRobert Aymar Julian
Original AssigneeRobert Aymar Julian
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable bedrest
US 3392412 A
Abstract  available in
Images(4)
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Claims  available in
Description  (OCR text may contain errors)

July 16, 1968 J. R. AYMAR ADJUSTABLE BEDREST 4 Sheets-Sheet l Filed Jan. l2, 1967 mvENToR. JUL/AN ROBE'QT AYMAR f uwwn M l ATTORNEYS July 16, 1968 J. R. AYMAR 3,392,412

ADJUSTABLE BEDREST Filed Jan. l2, 1967 4 Sheets-Sheet 2 s INVENTOR. .S5 JUL /A /v Hoet-R7' AWWA/2 LE Wwww ATTORNEYS July 16, 196s J. R. Amm

ADJUSTABLE BEDREST 4 $heets-Sheet 5 Filed Jan. l2. 1967 INVENTOR. JUL/AN RBEQTAYMA BY 01A* J6 July 16, 1968 J. R. AYMAR ADJUSTABLE BEDREST 4 lSheets-Sheet 4 Filed Jan. l2, 1967 I N VEN TOR. JUL/AN ROBERTAYMAR BY @MJ/,5f @0M ATTORNEYS United States Patent() M 3,392,412 ADJUSTABLE BEDREST Julian Robert Aymar, 5124 Fort Hamilton Parkway, Brooklyn, N.Y. 11219 Filed Jan. 12, 1967, Ser. No. 608,798 4 Claims. (Cl. 5-327) ABSTRACT F THE DISCLGSURE A bedrest having bellows placed under a mattress and filled with compressed air by a motor located near the bed and switched on and olf by a switch which can be placed on the bed. The same switch serves to release the compressed air filling the bellows.

The present invention relates to a bedrest which may be conveniently placed under a mattress for raising and lowering a portion of the mattress, such as the portion constituting the head and backrest of the user, or the portion upon which his feet are located. Prior art bedrests of this type consist of metal or wood frames which must be set, raised and lowered by persons standing near the bed. The present invention is intended primarily for bedridden patients although, of course, it can be used by perfectly healthy persons. A characteristic feature of the invention is that a person lying on a bed, by pressing a switch and without moving outside of the bed, can raise a portion of the mattress and, by pressing the same switch, can lower it again. Thus a person lying on `a bed can change his or her position from a lying position to a sitting position and vice versa or raise and lower the legs without leaving the bed and without requiring any outside help. This is accomplished by bellows which receive compressed air from a motor located near the bed.

An object of the present invention is the provision of an adjustable rest for beds which can be conveniently operated by a person lying on a bed by means of a switch without it being necessary for the person to change his or her position.

Other objects of the present invention will become apparent in the course of the following specification.

In the accomplishment of the objectives of the present invention it was found desirable to employ specially constructed bellows which are placed between the mattress and the springs of a bed, either adjacent the top of the bed or at the bottom thereof depending on whether an adjustable backrest or an adjustable footrest is desired. The bellows are actuated by compressed air supplied by a motor which can be located close to the bed and which can be operated by the regular house current. A wiring connects the motor with a switch which can be conveniently placed upon the bed within reach of the person lying on the bed. The switch can be moved from an inoperative position to two operative positions. In the rst operative position the motor is actuated so that compressed air is supplied by the motor to the bellows, thereby expanding the bellows and raising the portion of the mattress under which the bellows are located. The switch moves automatically to the inoperative position as soon as pressure thereon is released. In the second operative position of the switch a valve is actuated to connect the interior of the bellows with the motor casing and thus with the outside atmosphere so that compressed air iiows out of the bellows, with the result that the mattress is lowered.

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings, showing by way of example, a preferred embodiment of the inventive idea.

3,392,412 Patented July 16, 1968 In the drawings:

FIGURE l shows a bed with a bedrest constructed in accordance with the present invention.

FIGURE 2 is a side view of the bellows when expanded.

FIGURE 3 is a section through a portion of the expanded bellows.

FIGURE 4 is another section through a portion of the bellows along the line IV-IV of FIG. 3.

FIGURE 5 is a top view of the actuating motor.

FIGURE 6 is a section through the motor along the line VI-VI of FIG. 5.

FIGURE 7 is a diagram illustrating the electrical connections.

FIGURE 8 is a section through the switch which actuates the motor.

The bedrest shown in the drawings includes bellows 11 and a motor 12. The bellows 11 when folded have a comparatively small thickness so that they can be conveniently .placed under a mattress 13 without changing to any substantial extent the normal horizontal position of the mattress. The bellows 11 are preferably attached to the frame 14 of the bed by straps 15. In FIG. 1 the bellows 11 are shown as being placed under the head portion of the mattress 13. Obviously, the bellows may be placed under the foot portion of a mattress or in any other desired location.

The motor 12 is connected with the bellows 11 by a tubing 16. The motor 12 is supplied with electrical current through a plug 17 which may be iixed in the usual outlet of house current. The motor 12 is actuated by a switch 18 which may be conveniently placed on top of the bed. Thus a person lying in bed by merely pressing the switch 18 can till the bellows 11 with compressed air from the motor 12 and thereby move the head portion of the mattress 13 to a raised position shown by broken lines in FIG. 1. This procedure will be described in greater detail hereinafter.

The bellows 11 are shown in greater detail in FIGS. 2, 3 and 4. They preferably consist of thin sheets of a foldable plastic material, although obviously, any other suitable material may be used. The bellows include a hard bottom plate 19 made preferably of cardboard or :a thin sheet of wood, and a similar hard top plate 20. The plates 19 and 20 are completely enclosed by sheets 21 of the foldable plastic material and the folds of the bellows are located between the two plates. In the example illustrated, these folds are formed by double sheets 22, single sheets 23 and connecting pieces 24. Another sheet Imay extend beyond the bellows and lit directly under the mattresses. A double sheet 22 is folded over at 25 and its two ends are rmly joined by an adhesive so as to form a rib 26, preventing any escape of compressed air. A single sheet 23 is connected by the same adhesive to the inner fold 25. The outer end of the sheet 23 is connected to a connecting piece or strip 24, again forming a rib 27. The other end 28 of the strip 24 is connected to the sheet 22 at a distance from the outer edges of the sheet 22 (FIG. 4) so as to provide a fold or a cushion effect. These connections of the folds of the bellows may be varied and repeated, depending upon the desired size of the bellows. As already stated, the adhesive used to establish these connections must provide a permanent firm air-tight structure. The inner sheets of the bellows have aligned holes 30 to provide access for compressed air t0 all compartments formed by the sheets. An end of the tube 16 extends into one of these compartments .and is firmly and air-tightly connected to the adjacent edges of the sheet so as to prevent any escape of compressed air flowing through the tube 16 into the interior of the bellows.

v The motor 12 shown in FIGS. 5 and 6 has a casing 31 mounted on legs 32. The bottom 33 of the casing has openings 34 for admission of air. Inside the casing 31 there is an electric air compressor 35 of the usual type having magnetic poles 36 and a rotor 37 having a shaft 38 with blades 39. A wire 40 connects the air compressor 35 with the house current through the plug 17. A transformer (not shown) may be used to transform the current supplied by the usual household connections for actuating the air compressor.

Air compressed within the casing 31 is introduced into the interior of a valve 41 through an opening 42 provided in the casing 43 of the valve 41. The casing 43 is suspended from the cover 44 of the motor casing 31 and is air-tightly connected with the cover.

The valve 41 includes a magnetic relay 45 connected by a wire 46 with the same plug 17 which supplies house current to the air compressor 35. The relay 45 actuates a rod 47 carrying a disc 48 lying upon a plate 49 within the valve casing 43. The disc 48 is provided with ribs 50 for guiding the current of compressed air. In the inoperative position shown in FIG. 6 the disc 48 separates the interior of the valve casing 43 from an upper chamber 51 communicating with the tube 16 supplying compressed air to the bellows.

The disc 48 carried by the rod 47 may be raised from the plate 49 by two independent means. In the rst place, compressed air provided by the air compressor 35 and filling the interior of the casing 31, wiil ow into the valve casing 43 through the opening 42 and will push the disc 48 upwardly, so that compressed air will liow into the chamber 51 and the tube 16, reaching the bellows 11. In the second place, the user lying on the bed may actuate the relay 45 by operating the switch 18. The relay 45 will move upwardly the rod 47 carrying the disc 48 so that the interior of the bellows 11 and of the chamber 51 will communicate with outside air through the valve casing 43, the opening 42, the motor casing 31 and the openings 34.

The cover 44 of the casing 31 also carries a safety valve 52 of the usual type which operates automatically when air pressure within the casing 31 becomes excessive.

It is apparent that the switch 18 has the double function of filling the bellows 11 with compressed air and of removing compressed air from the bellows. For that purpose, the switch 18 is provided with a plate 53 (FIG. 8) which is pivoted in the middle and which may be pressed downwardly from two opposite sides by a linger of the user. When the user presses downwardly one side of the plate 53, an electrical connection is established between contacts 54 and 55. These contacts will provide a connection of the air compressor 35 with the plug 17 supplying electric current through the wires 40, 56 and 57 (FIG. 7) so that the air compressor will be actuated. As long as the user continues his pressure upon this side of the plate 53, the electrical connection will be maintained and air compressed by the compressor 35 will flow through the casings 31 and 43, the chamber 51 and the tube 16 into the interior of the bellows 11 and will gradually expand these bellows. As soon as the user ceases his pressure upon the plate 53, a spring 58 (FIG. 8) will move the contact 54 and the plate 53 back into the inoperative position, thereby separating the contacts 54 and 55. The llow of the electrical current to the air compressor 35 will cease. Compressed air in the bellows 11, the tube 16 and the chamber 51 will press the disc 48 against the plate 49, so that no escape of compressed air is possible.

It is apparent that this arrangement will make it possible for the user to raise his back-or any other part of his body-to any desired extent, but at the same time will be lowered by the weight of the user or that of the mere raising of a inger is suicient to stop the supply of compressed air.

When the user decides that he wants to lower the raised portion of the mattress or to return to the horizontal position, he presses downwardly the opposite side of the plate 53. Then a connection is established between contacts 58 and 59 connected to wires 57 and 60, respectively, which along with the wire 46 supply electrical current to the relay 45. The relay 45 will raise the rod 47 with the disc 48, so that compressed air will How out through the casings 43 and 31 so that the bellows 11 will be lowered by the weight of the user or that the mattress. The switch 18 will remain in this position until the user actuates again the plate 53.

Thus the bedrest of the present invention makes it possible to raise or lower any section of the mattress by the use of only one linger of the person lying in the bed.

It is apparent that the described embodiment is capable of many variations and modifications. For example, the safety valve 52 constituting a by-pass may be used for the removal of compressed air from the bellows. A single motor may be used to actuate several bellows located in the same bed or in different beds. Those and other variations and modifications are to be included within the scope of the present invention.

What is claimed is:

1. A bedrest comprising expansible bellows, an electric air compressor, a valve connected with said bellows and said air compressor and opened by air compressed by said air compressor for transmitting said compressed air from said air compressor to said bellows, a relay connected with said valve for opening said valve, single switch means connected with said air compressor and said relay for selectively actuating said air compressor and said relay to open said valve, a casing having a cover, side walls and a bottom, said bottom having at least one hole for the admission of air, said electric air compressor being located within said casing, said valve having a casing located within the first-mentioned casing and suspended from the cover thereof, said relay being located within the second-mentioned casing, said valve further comprising a plate located within the second-mentioned casing, a rod extending through the second-mentioned casing, a disc fixed upon said rod and adapted to engage said plate, the second-mentioned casing having an opening located below said plate and and communicating with the interior of the first-mentioned casing, whereby compressed air penetrating through said opening into the second-mentioned casing raises said disc and said rod, said relay when actuated also raising said rod and said disc, means carried by said cover and forming a chamber enclosing said disc and a tube connected with said chamber and said bellows.

2. A bedrest in accordance with claim 1, further comprising a safety valve carried by the cover of the firstmentionedcasing.

3. A bedrest in accordance with claim 1, further comprising a plug for household current and wires connecting said air compressor and said relay with said plug, said single switch means comprising a switch member movable from an inoperative position to any one of two operative positions, two contacts actuated by said switch member, a wire connecting said two contacts with said plug, a third contact engaged by one of said two contacts when said switch member is in one of the two operative positions, a wire connecting said third contact with said air compressor, a fourth contact engaged by the other of said two contacts when said switch member is in the other of the two operative positions, and a wire connecting said fourth contact with said relay.

4. A bedrest in accordance with claim 3, wherein said single switch means further comprise a spring engaging said switch member and moving said switch member from said one operative position to said inoperative position when pressure upon said switch member is released.

(References on following page) References Cited UNITED lFOREIGN PATENTS STATES PATENTS 581,796 8/ 1933 Germany. Carbonari 84-376 1,422,606 11/ 1965 France. Nunlist ---h 5-68 5 McLeod '5-67 BOBBY R. GAY, Primary Examiner. Briggs et al. 5-68 t E Hazard In ID3-148 R D KRAUS Asszs ant xamzner

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Classifications
U.S. Classification5/660, 5/713, 5/634
International ClassificationA47C20/00, A47C20/04
Cooperative ClassificationA47C20/048
European ClassificationA47C20/04G