Joints and connections – Articulated members – Lockable at fixed position
Patent
1996-01-11
1996-12-31
Kim, Harry C.
Joints and connections
Articulated members
Lockable at fixed position
403107, 403104, 24829731, 29741136, F16B 714
Patent
active
055887660
ABSTRACT:
An ascending/descending structure including a pull bar, a locking pin, a resilient retaining member and a locking tube formed with saw teeth-like locking notches for reliably locking the locking pin. The pull bar can be pulled outward along the locking tube for adjustment of height without slipping off or displacement. When the pull bar is reversely pushed inward, by the guide slot of the retaining member, the locking pin temporarily kept in a fixed position, permitting the pull bar to be pushed inward to the bottom of the locking tube for further adjustment of height.
REFERENCES:
patent: 1831613 (1931-11-01), Symons
patent: 3161395 (1964-12-01), Carter
patent: 4190377 (1980-02-01), Pleuss
patent: 4639039 (1989-01-01), Donovan
patent: 4982981 (1991-01-01), Fourrey et al.
patent: 5138911 (1992-08-01), Lan
patent: 5265938 (1993-11-01), Melhuish
patent: 5324096 (1994-06-01), Schultz
patent: 5435626 (1995-07-01), Lai
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