Joints and connections – Articulated members – Lockable at fixed position
Patent
1994-10-06
1996-04-02
Dorner, Kenneth J.
Joints and connections
Articulated members
Lockable at fixed position
16339, 16342, 24829213, 248921, 403103, E05D 1108
Patent
active
055034918
ABSTRACT:
A friction adjustable positioning pivot includes a first shaft including a tapering threaded rod which defines a hollow space therein and a slot along a periphery thereof. An urging tube is taperingly threaded therein for rotatably threading onto the tapering threaded rod of the first shaft. A spring received in the hollow space of the first shaft includes an outer periphery substantially in contact with an inner periphery of the hollow space of first shaft and an inner periphery. A second shaft includes a rod portion received in the spring and in contact with the inner periphery of the spring. The first shaft and the second shaft are rotatably retained in a relative angle due to a friction resulted from the spring against the inner periphery of the tapering rod of the first shaft and the rod portion of the second shaft, whereby the urging tube is allowed to be manually threaded onto the tapering rod of the first shaft thus tightening the tapering rod of the first shaft, which in turn tightens the spring from radial direction thereby increasing friction of the spring against the inner periphery of the tapering rod of the first shaft and the rod portion of the second shaft.
REFERENCES:
patent: 4639147 (1987-01-01), Schwarz
patent: 4712870 (1987-12-01), Robinson et al.
patent: 4982453 (1991-01-01), Matsumoto
patent: 5088156 (1992-02-01), Hosoi
patent: 5142738 (1992-09-01), Ojima
patent: 5211368 (1993-05-01), Kitamura
patent: 5231734 (1993-08-01), Rude
patent: 5333356 (1994-08-01), Katagiri
patent: 5340073 (1994-08-01), Masakazu
Chop Andrea
Dorner Kenneth J.
Pelton William E.
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