Patent ID: 7357363
Filing Date: 2008-04-15
Classification: A63B,F16B,Y10S

Abstract:
1. An expansion bolt for releasably gripping a hole surface, comprising: a cable; a first chock connected to a first end of said cable; a second chock for cooperation with said first chock such that translation of said second chock relative to said first chock in a first direction causes said chocks to slidingly assume relative positions corresponding to an expanded configuration of the expansion bolt that grips the hole surface, and translation of said second chock relative to said first chock in a second direction opposite said first direction causes said chocks to slidingly assume relative positions corresponding to a contracted configuration of the expansion bolt that releases the grip on the hole surface; and a cleaning bushing slidably connected to said cable, said cleaning bushing in response to application of an impact force thereto transmitting a force to one of said first and second chocks that results in a translation of said second chock relative to said first chock in said second direction.