Chairs and seats – Back movement resiliently opposed in operating position – Back adjusts independent of seat
Patent
1993-06-28
1995-03-14
Brown, Peter R.
Chairs and seats
Back movement resiliently opposed in operating position
Back adjusts independent of seat
297304, 297322, A47C 1032
Patent
active
053971655
ABSTRACT:
A seat support includes a base having a socket for receiving the end of a vertical support post. The base is not tiltable relative to the support post and extends toward the forward edge of a seat. A rearwardly downwardly inclined transverse crank slot is formed in the base adjacent the forward end of the base. Adjacent the post socket, the base includes a transverse slider pivot axis with an upwardly, rearwardly extending crank being connected to the base at the pivot axis. The crank includes a transverse pivot axis and a seat back support is fixed to the crank. Interconnecting the transverse slot of the base and the pivot axis of the crank is a slider. The slider is mounted to the underside of the seat and is pinned through the slot at its forward end. The rear end of the slider is connected to the slider pivot axis of the crank. When the seat is tilted rearwardly, the crank rotates rearwardly about the crank pivot axis and the angle of the. slider, hence the angle of the seat, inclines rearwardly. With the forward end of the slider connected to the slot, the forward end of the slider translates downwardly and rearwardly to compensate for increased elevation at the forward edge of the seat.
REFERENCES:
patent: 2859799 (1958-11-01), Moore
patent: 4062587 (1977-12-01), Wolters
patent: 4198094 (1980-04-01), Bjerknes
patent: 4438978 (1984-03-01), Arild
patent: 4502729 (1985-03-01), Locher
patent: 4537445 (1985-08-01), Neuhoff
patent: 4636004 (1987-01-01), Neumuller
patent: 4668012 (1987-05-01), Locher
patent: 5071189 (1991-12-01), Kratz
patent: 5308144 (1994-05-01), Korn
Grin Itzhak
Schmidt Markus
Brown Peter R.
Paltechnica Nitzanim
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