Device for securing a cap screw to an element that is to be attached to another element
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United States of America Patent
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Nov 10, 2015
Grant Date -
Apr 3, 2014
app pub date -
Apr 2, 2012
filing date -
Apr 4, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The cap screw (1) has a threaded portion (1b) having a nominal diameter (D1) that is greater than the diameter (D3) of its shank. The device comprises an anti-creep ring (4) designed to receive screw (1), one end of which has features (4a-4b-4c-4d) suitable for delineating, before ring (4) is engaged in a recess (2a) of element (2) that is to be screw fastened, a circular area having a diameter (D) that is greater than the nominal diameter (D1) of threaded portion (1b) and, after said ring (4) has been engaged in said recess (2a), a circular area (D) having a diameter (D2) that is less than the nominal diameter (D1) of threaded portion (1b), but greater than the diameter (D3) of shank (1a), so as to act as a stop for said threaded portion and trap screw (1) in ring (4) while permitting limited movement of the screw.
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