Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Made up of plural expansible segments or sections
Patent
1987-02-24
1988-02-23
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Made up of plural expansible segments or sections
411508, 411908, 411 60, 24297, 174138D, F16B 1306
Patent
active
047267224
ABSTRACT:
A two-piece plastic fastener comprising a body and a screw releasably secures a pair of panels together in spaced apart relationship. The body, which has a bore therethrough, comprises a body shank having a body head, outwardly extending, inwardly depressible, flexible locking tabs spaced from the body head, an external shoulder spaced from the tabs, and outwardly expandable walls spaced from the shoulder. The body shank also comprises, inside the bore, flexible screw thread engaging means and ramp means on the inside of the walls. The screw, which is insertable into the bore, comprises a screw head and a screw shank having a threaded portion and an unthreaded end portion. In use, the body shank is inserted into a hole in the first panel so that the latter is entrapped between the body head and the locking tabs. The body shank is then inserted into the hole in the second panel. The screw is axially inserted into the bore so that its threaded portion engages the thread-engaging means in the bore. The screw is then rotatably advanced so that its unthreaded end portion engages the ramps and effects outward expansion of the body walls thereby entrapping the second panel between the shoulder and the expanded walls. With the screw fully inserted, the threaded portion of the screw shank prevents inward depression of the tabs to thereby lock the first panel in place. Axial withdrawal of the screw from the bore causes the expanded walls to retract and enables withdrawal of the body from the hole in the second panel and also allows the tabs to be depressed to enable withdrawal of the body from the first panel.
REFERENCES:
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patent: 4674910 (1987-06-01), Hayashi
Brueske Curtis B.
Kirby Thomas F.
Nilles James E.
Phillips Plastics Corporation
Smith Gary L.
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