FR2747898A1 - Bed or seat with surface adjustable to shape of user - Google Patents

Abstract

The bed or seat has its surface made up of a series of separate mobile elements (1) arranged on top of an air-filled mattress (2) or cushion. The elements can be made e.g. from solid wood or plastics, measure 3-10 cm long by 1-5 cm wide and have a triangular, round, square, rectangular, hexagonal or octagonal cross-section. They are able to slide freely relative to one another by having clearances of a few tenths of a millimetre between them. The air cushion or mattress has an inflatable chamber with a pressure control valve (3) and is covered by a layer of a foam material (6) such as 'Bultex' (RTM).

Description

AIR COOLED PISTONS FOR REACTIVE BEDS AND SEATS
The present invention relates to a set of pistons placed vertically on an air cushion to produce reactive beds, armchairs or seats.

This set of pistons offers the possibility to mold to the body of
the user the surface of a bed or that of a seat. These pistons sink under the
weight of the round forms (for example Buttocks) and go up in the hollows
(example the hollow of the kidneys).

There are beds or seats of this type, but they have no
action by points.

 The present invention aims to overcome these disadvantages.

* 1st advantage it allows you to benefit from a bed or a seat which you can
adjust the sensitivity by inflating or deflating the air cushion.

* 2nd advantage it allows, by reaction of the air cushion, to raise
pistons in the hollows of a human body thanks to the insertion of other pistons
thus allowing to mold this body.

* 3rd advantage these pistons massage the body when the user
move.

* 4 th advantage the seated or propped up person will be supported in the hollow of their body (kidneys, cervical, inner knees..) With the same force as on the bumps (buttocks, shoulder blades, calves, head ..). The circulation of blood is improved which reduces the risk of bedsores for the sick and bedridden.

* 5th advantage air can circulate between the body and the pistons which reduces heat and therefore perspiration.

* 6th advantage: you go to bed and sit directly on the pistons, without mattress or padding, which avoids dust and mites. This is favorable for allergy sufferers.

* 7th advantage these pistons can be made of wood. Skin contact is therefore neither too cold in winter nor too hot in summer. This contact is healthy and natural.

* 8th advantage these pistons in treated wood or plastic can be disinfected (hospitals), disappearance of miasma of the mattresses.

* 9 same advantage. possibility to use urine recovery mattress covers by removing a plunger.

* 10th advantage no metal part, this is interesting there is an increasing number of users wanting a bed without metal part.

* 11 same advantage no complex parts, operation is safe. The pistons which slide by friction against each other over their entire surface make the risks of wear almost zero.

* 12th advantage these pistons can take very different square, rectangular, round, exagonal, triangular, octagonal shapes. The pistons can preferably be made of wood but also of plastic.

The means used to obtain this result are
A series of support points arranged on an air cushion. The invention will be better understood thanks to the drawings
Figure 1 shows the section of the device. Between the support points 1 (pistons) and a hard surface representing the bottom of the bed or seat 5 Fig 1, there is an air cushion 2 Fig 1. Foam sheets like "BULTEX" 6 Figl are interposed for protect the air cushion from drilling risks.

 An inflation nozzle 8 makes it possible to dose the pressure of the air cushion at will. A valve 3 ensures the closure. The air pressure is very low and should not stretch the cushion to the maximum.

 The body of the user of the bed or seat will compress the air cushion by means of the pistons which will descend under the pressure of the bumps and go back up into the hollows of the body of the user thanks to the reaction of the cushion. under inflated Fig 2.

 The air cushion is made of rubberized canvas or "P.V.C." allowing a good reaction.

 The bed or the seat is formed by juxtaposition of a large number of elements 1 arranged one beside the other, without links between them, but held together by a frame 4.

 By way of nonlimiting example we will describe prototypes which have been produced according to the invention.

The part 1 Fig 1 and 2 made of solid wood or plastic can
be 3 to 10 centimeters long and 1 to 5 centimeters wide.

Part 1 can take the form of a triangular, round, square base,
restangular, exagonal, octagonal Fig 3.

 The part 1 Fig 1 closely juxtaposed with other parts 1. can slide freely thanks to the play of a few tenths of a millimeter.

 The friction of the parts 1 between them is favored by a dry lubricating surface treatment.

 The frame 4 Fig 1 is made up of four segments without connection between them which contain the pistons 1. These segments are integrated in a rigid bed or seat frame 9 Fig 1.

 The frame segments 4 Fig 1 are movable. Springs or compressed foam permanently push the frame 4 towards the inside of the bed or seat.

This device is necessary to maintain a constant tightening of the pistons 1 against each other, in particular when they are made of solid wood which can dry or regain moisture and therefore vary in width.

 The reaction of the system, i.e. its possibility of sinking in one place and going up in other places is obtained thanks to the air cushion 2.

 FIG. 2 represents the effects of a body under pressure on the support points (pistons) 1.

 This reaction is obtained thanks to the incomplete inflation of the air cushion and the flexibility of its envelope.

 In dotted lines, we see that the pistons 1 Fig 2 sink into a bump and go back up in the hollows thanks to the air which is compressed at the locations of the bumps and move thanks to the flexibility of the envelope of the cushion. air to the troughs Fig 2.

Claims (6)

PISTONS ON AIR CUSHIONS CLAIMS FOR REACTIVE BEDS AND SEATS  1 - Suspension device on air cushion for reactive beds and seats characterized by the possibility of marrying the body of a person lying down or seated by exerting almost identical pressure on the anatomical parts in contact with the bed or the seat, composed of mobile elements (pistons) 1, autonomous resting on a flexible air cushion 2 deformable, the whole being contained in a box 4 and 9 fig l.  2 - Device according to claim 1 characterized by the possibility of dosing, at the choice of the user, the reaction of the system and therefore the support and the molding of the body by modifying at will the inflation of the air cushion 2. The adjustment is personalized - inflation tip 8 - closing valve 3.  3- Device according to claim 1 characterized by the possibility of having pistons 1 whose base shape (square, round, hexagonal, etc.) and the dimensions of width and length fig 3 are variable. This allows a perfect adaptation to all chassis shapes, even random shapes in a contemporary style fg 3.  4 - Device according to claim 1 characterized by the possibility of establishing a constant clamping of the pistons between them, if their width dimension comes to vary. A frame made of four elements, permanently pushed by foam or springs ensures constant pressure even if the solid wooden pistons work 4 fig 1.  5 - Device according to claim 1 characterized by the possibility of sleeping on a piston bed without using a traditional mattress, grnce g "very large number of support points (pistons) 1 and the flexibility and extent of the deformation made possible by the air bag (s) 2.  6 - Device according to claim 1 characterized by a great adaptation to solve the problems of pain, bedsores, heating, allergies to mites, asthma and circulatory problems.  - circulatory problems due to the massage effect with each movement of the sleeper.  - heating by ventilation between the pistons  - pressure sores due to the large number of pistons with identical pressure at all points  - pain when taking the ergonomic mold