Adjustable telescopic device

Details Adjustable telescopic device Adjustable telescopic device

1979-09-06

1982-03-09

Schultz, William H.

Supports

Stand

Standard type

F16M 1126

Patent

active

043185266

ABSTRACT:
In a vertical telescopic device having an inner tube which carries a load such as from the seat of a chair and is adjustably mounted in an outer tube and adapted to be locked to the same by rolling elements releasably spring loaded from below and wedged between the outer tube and downwardly tapering faces of the inner tube, the rolling elements are shaped as rollers with a surface generatrix matching the inner face of the outer tube. Even the said tapering faces have a corresponding cross-sectional shape. In a structure where the spring member loading the rollers also serves for elongating the device in released condition, additional locking rollers are wedged between the outer tube and upwardly tapering faces likewise subjected to the spring load.

REFERENCES:
patent: 478840 (1892-07-01), Briggs et al.
patent: 3467352 (1969-09-01), Bohler
patent: 3865341 (1975-02-01), Fortnam
patent: 4033543 (1977-07-01), Ponzellini

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