Supports – Stand – Standard type
Patent
1988-10-07
1989-09-19
Foss, J. Franklin
Supports
Stand
Standard type
248125, F16M 1100
Patent
active
048674060
ABSTRACT:
A vertically adjustable seat support arrangement for a chair, stool or the like having a lower pedestal, and an upper seat, the seat support arrangement including a vertical elongated tubular member having a lower end fixed to and supported by the pedestal, an elongated support post formed as a symmetrical solid of revolution about a central axis, said support post telescopically received within and vertically movable relative to the tubular member, the support post having an upper end fixed to the seat, a locking mechanism including a locking pin selectively movable transversely between a post locking position where the pin extends through a sidewall of the tubular member and engages the post and a post releasing position where the post may be moved vertically relative to the tubular member, a sleeve through which the post passes, the sleeve fixed within the tubular member serving as a side thrust bearing and post stop for preventing post travel beyond a predetermined maximum seat elevation, spring bias means for urging the locking pin toward the post locking position, and a lever for moving the locking pin against the spring bias to free the post allowing vertical seat adjustment relative to the pedestal, means for limiting locking pin motion to rectilinear motion toward and away from the post.
REFERENCES:
patent: 1609246 (1926-11-01), Hamburger
patent: 2530877 (1950-11-01), Heck et al.
patent: 2659413 (1953-11-01), Cramer
patent: 3327985 (1967-06-01), Levit et al.
patent: 3770236 (1973-11-01), Marsh
Foss J. Franklin
Rickert Roger M.
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