Preassembled fastener unit for clamping plastic workpieces

Details Preassembled fastener unit for clamping plastic workpieces Preassembled fastener unit for clamping plastic workpieces

F - Mech Eng,Light,Heat,Weapons

16

B

85/143, 85/8

F16B 39/24 (2006.01) F16B 39/26 (2006.01) F16B 43/00 (2006.01)

Patent

CA 1107098

PREASSEMBLED FASTENER UNIT FOR CLAMPING PLASTIC WORKPIECES Abstract of the Disclosure A preassembled bolt and washer-like device designed for use in securing an upper, plastic-like workpiece to a lower support struc- ture so that cold flow of the plastic is minimized while applying a relatively high clamp load to the joint. The washer includes a tubular sleeve having radially inwardly directed protuberances at the upper region of the inner wall designed to snap onto the shank of the bolt and be axially retained and free spinning therein. The upper extremity of the shank of the bolt includes a radial outward protuberance cooperating with the protuberance on the sleeve. The threaded region of the shank extends within the confines of the sleeve so the thread runout at the upper extremity of the shank will not prevent the sleeve from clamp- ingly engaging the lower support structure.

332055

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