Patent ID: 7048266
Filing Date: 2006-05-23
Classification: B21J,B25B

Abstract:
1. A temporary fastener for urging a plurality of workpieces together through aligned apertures in the workpieces, said temporary fastener comprising: a housing having an axial bore therethrough; a spreader member connected to said housing transverse to said axial bore; a piston located within said housing and capable of movement therein in response to the introduction of pressurized fluid within said housing; at least one pair of expandable flexible fingers connected at one end to said piston and extending outside said housing, said spreader member located between said fingers, and wherein movement of said piston causes said fingers to partially retract within said housing and causes said fingers to wedgingly engage said aligned apertures; and a check valve that permits introduction of pressurized fluid into said housing and prevents fluid release therefrom, wherein said check valve is located within said piston.