Chairs and seats – Movable back
Patent
1985-02-12
1987-06-30
Aschenbrenner, Peter A.
Chairs and seats
Movable back
297283, A47C 740
Patent
active
046765506
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a seat for a vehicle, particularly motor vehicle, comprising a bottom and a back.
When a motor car, for example, moves along the road, the always-present unevenesses of the road cause oscillations of this car, and consequently of the seats thereof, along an up and down direction.
It has been noticed that this phenomenom is often the cause of acute pains in the passenger back, or even severe impairments to the integrity of some vertebrae or of the spinal cord included in the vertebral column.
SUMMARY OF THE INVENTION
One of the essential objects of the present invention is to provide a seat which may be suitable for any kind of car used for conveying passengers, such as motor car or railroad car, allowing to obviate said drawbacks and this without requiring to modify the known location or fastening of the standard seats.
For this purpose according to the invention, that portion of the seat back against which bears the back of an individual who is sitting in the seat, has a rest which is so mounted as to be swingable together with the back of this individual, substantially along the seat back plane and in an up and down direction relative to the seat.
Advantageously, this rest is mounted on a frame integral with th seat back and extending substantially along the plane thereof, through resilient return means letting this rest swing about a fixed point relative to the frame.
According to a preferred embodiment of the invention, a trim in the shape of an endless strip, is stretched about the seat back, the rest and two rollers with horizontal rotating axes mounted on the top and bottom of the seat back.
BRIEF DESCRIPTION OF THE DRAWING
Other details and features of the invention will stand out from the description, given hereinafter by way of non limitative example, of a particular embodiment of the invention, with reference to the accompanying drawing which shows diagrammatically and in vertical section, a seat from a motor car.
DESCRIPTION OF THE PREFERRED EMBODIMENT
This seat comprises a bottom 1 and a back 2, which is for example hinged to the bottom.
This bottom is mounted conventionally on the floor 3 of the car, in such a way that the fastening means thereof on this floor have not been shown.
According to the invention, that portion of the seat back against which bears the back 4 of an individual taking place in the seat, is provided with a rest 5 so mounted as to reciprocate together with the back 4 of this individual, substantially along the plane of the seat and in an up and down direction relative to the bottom, as shown by the double arrow 6.
This rest 5 is mounted on a frame 7 integral with the seat back 2 and extending substantially along the plane thereof, through resilient means 8 letting this rest 5 reciprocate along the direction of the arrows 6 relative to a fixed point 9 of the frame.
This frame may for example be comprised of metal sections as the frames used in the conventional seats of motor cars.
The base 10 of this frame lies in the back portion of bottom 1 and is hinged on a metal frame 11 integrated in a horizontal position inside the lower portion of the bottom. It may be a frame known per se, bearing the springs not shown, of bottom 1.
The frame 7 generally has a rectangular shape and is comprised of two uprights 12 and two horizontal cross-ties 13 and 14, respectively connecting the upper and lower portions of said uprights 12.
In the embodiment of the seat as shown in the FIGURE, these cross-ties 13 and 14 are comprised of rods or shafts on which are freely-rotatably mounted, respectively, two pulleys 15 and 16 lying on the inner side of frame 7, adjacent both uprights 12 thereof.
Flexible links such as belts 17 and 18, are trained over said pulleys and connect the rest 5 through resilient members 8 to the fixed point 9 lying on the opposite side of frame 7 relative to rest 5.
Thus on each side edge of the seat back, adjacent each one of the uprights 12, there is provided a pair of pulleys 15 and 16 with which
REFERENCES:
patent: 1007985 (1911-11-01), Smith
patent: 1265474 (1918-05-01), Mikulic
patent: 1273953 (1918-07-01), Torano
patent: 2075821 (1937-04-01), Meyers
patent: 2509102 (1950-05-01), Kuebler
patent: 2903043 (1959-09-01), Kenney
patent: 3337260 (1967-08-01), Proctor
patent: 3810263 (1974-05-01), Taylor
patent: 3917341 (1975-11-01), Albinson
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