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Class 297/307 - Constantly oriented during up-and-down movement


Subclass of Class 297 - Chairs and seats
Definition: Device wherein the back is adjustable vertically and wherein
No. of patents: 19
Last issue date: 01/05/1993


NumberTitleIssue Date
5176356Seat suspension with quick height adjustment
A seat suspension having a stationary support that can be mounted on a vehicle. An intermediate frame is mounted on the stationary support for vertical sliding movement relative thereto by a spring suspension. A seat support frame is mounted on the interm...
01/05/1993
4890810Seat suspension device
A seat suspension device which comprises an upper frame, a lower frame, a pair of linkage mechanisms provided between the upper and lower frames, and a torsion bar which elastically supports the seat upon the suspension device. The torsion bar is so arran...
01/02/1990
4832401Apparatus and method of a seat with a floating lumbar
The present invention provides an apparatus and method of utilization thereof of a vehicle seat wherein the position of a lumbar support on the seat back is adjusted automatically in response to the deflection of the femur seating surface of the seat cush...
05/23/1989
4728087Anchoring arrangement for heavy coil springs, primarily in coil spring carried playground devices
Adjacent the rigidly anchored end of a vertical coil spring, which carries out transverse oscillations, the spring is subjected to considerable breaking forces which limit the lifetime of the spring. At least one abutment is provided to cooperate with a s...
03/01/1988
4728149Seat for vehicle, notably motor vehicle
A seat for a vehicle, preferably a motor vehicle, includes a bottom and a back. The back of a passenger bears against the back of the seat. The back of the seat is mounted to swing together with the back of the passenger in a vertical direction. The seat ...
03/01/1988
4662597Suspension for vehicle seat
A seat suspension for resiliently attaching a seat assembly to a support frame on a vehicle so as to cushion the ride for the seat occupant comprises: main biasing springs operatively connected between the seat assembly and support frame to initially abso...
05/05/1987
4505513Suspension seats for vehicles
The invention relates to a suspension seat for a vehicle. The vehicle suspension seat has a back rest guided for vertical movement relative to a base part, a seat rest hinged to the back rest and guided for movement such that the body of the seat occupant swin...
03/19/1985
4494794Vehicle seats
This invention relates to a vehicle seat of the type in which a seat part is supported and guided for upward and downward movement relative to a base part by a spring suspension. In order to avoid loss of contact between the feet of the seat occupant and ...
01/22/1985
4484723Air-sprung seat
An air-sprung vehicle seat wherein adjustment in respect of weight is provided by a control cam and two spaced-apart switches actuable thereby upon relative movement thereof in dependence on a variation in the seat height. One of the switches controls the...
11/27/1984
4397501Vehicle seat, more specially for commercial vehicles
A commerical vehicle seat with a mechanism for adjusting the seat to the weight of the driver, wherein there is provided a support plate for the backrest of the seat capable generally of upright motion relative to a backrest support. Between the backrest ...
08/09/1983
4353594Vehicle seats
A suspension seat has a seat part, which includes a seat support frame and a back rest frame pivoted about a horizontal axis to the seat support frame, the seat part being mounted through a spring suspension on a base part, and a vibration damper of the p...
10/12/1982
4289351Low profile truck seat
A low profile seat for vehicles features structural geometry which enables the use of an air spring to control seat height and rate in vehicles whose interior dimensions does not provide for the placement of a more conventional air spring vehicle seat. A ...
09/15/1981
4211426Weight relieving ambulator
The walker includes a frame structure mounted on rear wheels and forward casters in turn supporting a parallelogram structure lying essentially in a vertical plane. The rear ends of the upper and lower horizontal members making up the parallelogram struct...
07/08/1980
4181353Vehicle seat
A resiliently-mounted vehicle seat has a resilient damped mounting between the seat frame and an underframe. The mounting seeks to avoid a construction which impedes up and down movement of the seat frame and tilting of a back rest pivotally connected to ...
01/01/1980
4181354Vehicle seat
A resiliently-mounted vehicle seat has a spring unit on the linkage between the seat frame and the underframe. The unit is interposed between the linkage and the seat frame and includes springs which extend between an extension of the linkage and the seat...
01/01/1980
4181355Vehicle seat
A resiliently-mounted vehicle seat is provided with means for adjusting its height. The seat is of the kind having a seat frame supported from an underframe by scissors linkages. A link of each scissor linkage has an extension piece which is engaged by a ...
01/01/1980
4153295Vehicle seat assembly
A seat assembly for an all-purpose vehicle such as a lorry or tractor comprises a frame carrying the seat. The frame is movably connected to a base secured to the vehicle....
05/08/1979
4087069Suspension system for wide seat
Suspension system for wide seats having a rigid occupant supporting member has a pair of parallel, rotatable drums mounted to a rigid portion of a vehicle at a fixed horizontal distance from each other. A plurality of flexible web or cable support members...
05/02/1978
3986748Tractor chair cushion device
The invention comprises a tractor cab having a drivers chair therein. A plurality of shock absorbing means are mounted between the tractor cabs and the chair and extend upward and downward from the chair to the cab to cushion the movement of the chair rel...
10/19/1976
 
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