Closure fasteners – Bolts – Sliding and rotary
Patent
1992-12-01
1993-10-19
Moore, Richard E.
Closure fasteners
Bolts
Sliding and rotary
292DIG46, E05C 504
Patent
active
052539040
ABSTRACT:
A lock comprising a stationary sleeve, a hollow cylindrical member, a tubular member and a means for rotating the hollow cylindrical member. The stationary sleeve defines a spirally extending slot that extends its entire length. The spirally extending slot is formed between a first edge and a second edge of the stationary sleeve. The hollow cylindrical member defines an axially extending slot that extends its entire length. The hollow cylindrical member is movably positioned within the stationary sleeve. The tubular member has a projecting tab fixed thereto and is slidably disposed within the hollow cylindrical member wherein the projecting tab is slidingly engaged simultaneously within the spirally and axially extending slots. The rotating means causes the hollow cylindrical member to rotate in a first direction or in a second direction. When the hollow cylindrical member is rotated in a first direction, the projecting tab physically contacts the first edge of the stationary sleeve. This physical contact results in the exertion of a first displacing force upon the projecting tab thereby causing the tubular member to telescopically extend from the hollow cylindrical member. When the hollow cylindrical member is rotated in the second direction, the projecting tab physically contacts the second edge of the stationary sleeve. This physical contact results in the exertion of a second displacing force upon the projecting tab thereby causing the tubular member to telescopically retract into the hollow cylindrical member. The rotating means comprises a knob, which is typically controlled by a user. The displacement of the tubular member is coaxial with the knob.
REFERENCES:
patent: 550221 (1895-11-01), Euphrat
patent: 1517817 (1924-12-01), Aufderheide
patent: 1907625 (1933-05-01), Vogt
patent: 3501932 (1970-03-01), Bishop
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