Illinois Tool Works Inc.

Richard F Daubert

Brian R Peek

Paul M Sutenbach

Lisa E Chisholm

A one-piece plastic wing-nut fastener is constructed to push onto a threaded stud and be held in threaded engagement therewith through the use of a pair of opposing arcuate thin wall sections which are formed with internal threads and which flex radially outward whenever the fastener is pushed onto a threaded stud to provide a ratcheting action therebetween. The thin wall sections are supported on a base member by a U-shaped support having a head section and a pair of leg portions. The pair of leg portions are integrally formed with the base portion and extend between the base portion and head portion in a parallel relationship with the thin wall sections. The pair of thin wall sections are integrally formed between the base and the head portion with its axis in alignment with an enlarged aperture in the base portion and an enlarged central opening in the head portion.

Push-on plastic wing-nut fastener

A multi-part fastener assembly for attachment of a carpet-like member to a support. The fastener is designed to minimize snagging and/or scraping-type of engagement with objects that come in contact therewith. The exposed fastener part is an annular member which has a radiussed outer edge from which a plurality of rigid projections extend. The projections are designed to be able to penetrate the carpet-like member and a radially extending flange of another fastener part and be folded to fixedly position the fastener relative to the carpet-like member. The radially extending flange has areas of reduced thickness to ease the projections therethrough and is deflected to create an annular mounding of the carpet-like member around the annular member to cooperate therewith in increasing the resistance of the fastener to snagging type of engagement.

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Tinley Park, IL, United States of America

Richard F Daubert