Supports – Stand – Understructure
Patent
1989-04-14
1990-06-12
Britts, Ramon S.
Supports
Stand
Understructure
248411, F16M 1126
Patent
active
049326228
ABSTRACT:
A leg locking device for a telescopically extensible leg of a tripod support which prevents deformation of an inner leg section so as to provide secure, long-lasting engagement of the locking device. Each telescopically extensible leg of the tripod supports includes at least one pair of outer and inner tubular leg sections telescopically slidable one within the other, wherein each tubular leg section has a six-sided polygonal cross-section. A leg locking device associated with each telescopically extensible leg has a locking lever mounted on the outer leg section for pivotal movement transverse to the longitudinal axis of the telescopically extensible leg. In the locking position, an eccentric cam element on the locking lever engages an angled wall of the inner leg section, so as to apply a locking force diagonally across the cross-section of the inner leg section, and thus urge the diagonally opposite corner of the inner leg section into frictional engagement with the corresponding corner of the outer leg section.
REFERENCES:
patent: 3941492 (1976-03-01), Meinunger
patent: 4029279 (1977-06-01), Nakatani
patent: 4185936 (1980-01-01), Takahashi
patent: 4596484 (1986-01-01), Nakatani
patent: 4725160 (1988-02-01), Wood
patent: 4761092 (1988-08-01), Nakatani
Britts Ramon S.
Hulseberg Daniel J.
Velbon International Corporation
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