Chairs and seats – Back movement resiliently opposed in operating position – Constantly oriented during up-and-down movement
Patent
1987-05-01
1989-05-16
Aschenbrenner, Peter A.
Chairs and seats
Back movement resiliently opposed in operating position
Constantly oriented during up-and-down movement
267131, 297306, 297DIG3, A47C 300
Patent
active
048304328
ABSTRACT:
A positioning device is used for the positioning of a chair seat as to its inclination, or for positioning a back-rest member of a chair. The positioning device is constructed such as usual hydropneumatic springs which can be locked by closing a passage connected to working chambers on both sides of a piston. The working chambers are filled with an operating liquid. In order to adapt the biasing force of such a positioning device, one of the working chambers is conneced with a force-measuring device, which force measuring device is provided within the force transmission path of the respective chair column. The force measuring device comprises a measuring space filled with operating liquid, and this operating liquid is in liquid connection with one of the working chambers.
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Fuhrmann Castor
Hosan Hans-Josef
Knopp Axel
Wurges Gerd
Aschenbrenner Peter A.
Rendos Thomas A.
Stabilus GmbH
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