Adjustable support

Details Adjustable support Adjustable support

1985-04-25

1987-03-17

Ramirez, Ramon O.

Supports

Stand

Understructure

108144, 248412, F16M 1124

Patent

active

046501436

ABSTRACT:
An adjustable support (10) for a tabletop (12) includes a base (14), a leg tube (16) rotatably mounted to the base (14), an adjustment tube (18) connected to the leg tube (16) and a spider (20) mounted to and between the adjustment tube (18) and the tabletop (12). A top cap (42) fixedly mounted to the leg tube (16) threadably engages the inside upper wall (56) of the adjustment tube (16) and is rigidly attached to a tension rod (48) secured to and between the base (14) and the top cap (42). In this manner, rotation of the leg tube (16) adjusts the height of the leg tube (16) relative to the adjustment tube (18) to adjust the tabletop (12) to the height desired relative to the floor. The support (10) also includes a wedge ring (90) circumscribing the leg tube (16) and threadably engaging the inside lower wall (58 ) of the adjustment tube (18); an outwardly-projecting key (92) integral with the wedge ring (90); and a split collet (94) engaging on its upper side (102) the wedge ring (90) and at its lower side (104) the spider (20) and adapted to contact radially around the leg tube (16). During assembly of the support (10), the adjustment tube (18) is rotated relative to the leg tube (16) to cause the wedge ring (90) to rotate until the key (92) interferes with a rib (88) of the spider (20) and thereafter cause the wedge ring (90) to thread downwardly relative to the adjustment tube (18) to thereby tighten the collet (94) against the leg tube (16) through forces exerted on the collet (94) by the wedge ring (90) and spider (20). The foregoing assembly step compensates for manufacturing tolerances between the spider and the leg tube and provides some degree of frictional resistance to rotational movement of the leg tube (16) after the same has been set in the desired adjusted position.

REFERENCES:
patent: 275413 (1883-04-01), Rich
patent: 474750 (1892-05-01), Little et al.
patent: 1342951 (1920-06-01), Gagne
patent: 1451999 (1923-04-01), Perry
patent: 1970624 (1934-08-01), Recker
patent: 2649345 (1953-08-01), Hubbard
patent: 3063765 (1962-11-01), Huff
patent: 4156391 (1979-05-01), Ubezio
patent: 4195578 (1980-04-01), Benoit et al.
patent: 4239169 (1980-12-01), DeSantis
patent: 4492354 (1985-01-01), Rice
patent: 4515087 (1985-05-01), Kurrasch
patent: 4526334 (1985-02-01), Rantakari

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