Chair height adjustment mechanism

Details Chair height adjustment mechanism Chair height adjustment mechanism

1983-11-10

1985-09-10

Britts, Ramon S.

Supports

Stand

Standard type

188 67, 248410, F16M 1100

Patent

active

045401489

ABSTRACT:
A chair height mechanism in which a threaded nut (30) is threaded onto a threaded spindle (16) and a hub tube (18) supports the spindle through a clutch comprising a locking tube (34) secured to the nut (30) and having lower tapered portion (36), and a cylindrical liner (46) secured to the hub tube and having an upper tapered outer surface (48) which mates with the cylindrical liner (46) inner surface. A compression spring (42) biases the tapered surfaces of the liner (46) and the locking tube (34) into engagement.

REFERENCES:
patent: 2058451 (1936-10-01), Herold
patent: 2137178 (1938-11-01), Merivaara
patent: 3727871 (1973-04-01), Harper
patent: 3799486 (1974-03-01), Mohr et al.
patent: 3870271 (1975-03-01), Bowman
patent: 3923280 (1975-12-01), Good
patent: 4261540 (1981-04-01), Baker et al.
patent: 4285488 (1981-08-01), Hancock
patent: 4324382 (1982-04-01), Beukema et al.
patent: 4440372 (1984-04-01), Wisniewski

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