A - Human Necessities
47
C
A47C 3/20 (2006.01) A47D 1/00 (2006.01) B62B 7/08 (2006.01)
Patent
CA 2145796
In a chair which can change the height of its seat by changing cross angles formed by a pair of first leg members and a pair of second leg members which are rotatably connected with each other at intermediate portions thereof respectively, a caster mounting member (26) is mounted on a lower end portion of each leg member (8) to be rotatable about a horizontally directed axis (25), and a rotary yoke (24) of a caster (23) is mounted on the caster mounting member (26) to be rotatable about a vertically directed axis (27). The caster mounting member (26) is connected with a leg mounting member (10) by a connecting link (28), thereby defining a parallel crank mechanism by the leg member (8), the leg mounting member (10), the caster mounting member (26) and the connecting link (28). Thus, the casters which are mounted on lower end portions of at least either the first or second leg members can regularly serve functions thereof properly regardless of change in inclination of the leg members.
Aprica Kassai Kabushikikaisha
G. Ronald Bell & Associates
LandOfFree
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