| 摘要 |
A unitary protective stud bushing produced from a resilient plastic and including an elongated base having at least two distinct widths at either end and opposed longitudinal edges, and two rows of spaced apart teeth extending in splayed relationship from said longitudinal edges. Because of the distinct differences in the width of the base, the two rows of teeth are spaced apart different distances along the base such that when turned upon itself the teeth of the bushing along the narrower width nest within the teeth along the wider width. Because of the resilience of the plastic material, the bushing can be turned upon itself, inserted into a hole in steel structural member such that the teeth loosely engage either side of the periphery of the hole and the resilient plastic causes the base to spring open until the inside surface of the base contacts the periphery of the hole and the teeth engage opposing outer surfaces of the periphery of the hole. The bushing is then reliably engaged about the inner periphery by virtue of the teeth engaging the periphery of the hole and being held in place by the resilience of the base and wiring or cabling can be pulled through the hole without the danger of damage thereto.
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