Push in-screw out fastening system
AssigneeSquare D Company
InventorsJeffery J. Buchanan, Terrance A. Cassity
Life of this patent
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Abstract
A fastening system comprises a push in-screw out fastener having a slotted head, threaded cylindrical shank with a plurality of resilient thread segments thereon and a tubular receptacle. The diameter of the receptacle is less than the diameter of the thread segments and greater than the shank diameter such that the thread segments are deformed by insertion of the fastener into the receptacle. The receptacle has an internal thread formed at its entry. The internal thread engages the resilient thread segments to impart a removal force to the fastener when its slotted head is rotated in a counterclockwise direction.
Claims7
A fastening system comprising:
- a fastener means having a drive head and a threaded shank means, said threaded shank means including a plurality of resilient thread segments;
- receptacle means defining an orifice that is smaller than the greatest distance across said thread segments such that said resilient thread segments are deformed when said fastening means is inserted in said receptacle means;
- and
- thread engaging means in said receptacle means for engaging said thread segments and imparting a removal force to said fastener means upon rotation thereof.
A push in-screw out fastening system comprising:
- a molded, threaded fastener including a slotted head and a threaded cylindrical shank having a plurality of resilient thread segments;
- a tubular receptacle, having a diameter smaller than the widest expanse of said resilient thread segments, but larger than the diameter of said cylindrical shank, and a thread engaging section adjacent the entry of said tubular receptacle for imparting a removal force to said threaded fastener upon rotation of said slotted head.
Dependencies are inferred from the claim text.