Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 18, 2018
Patent Application Number
15343299
Date Filed
November 4, 2016
Patent Citations Received
Patent Primary Examiner
Patent abstract
A screw for use in joining workpieces, for example automotive body parts, is provided that includes a head portion, an externally threaded shank extending from the head portion, a flow-hole-forming tip disposed at a distal end portion of the externally threaded shank, and a recessed spring washer disposed under the head portion. The recessed spring washer is configured to apply a clamping load to joined workpieces as they expand and contract.
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