Fastener

Details Fastener Fastener

F - Mech Eng,Light,Heat,Weapons

16

J

85/11

F16J 15/06 (2006.01) F16B 33/00 (2006.01)

Patent

CA 1242599

FASTENER Abstract of the Disclosure A fastener includes a threaded shank with a driving head on one end and a washer of resiliently yieldable material encircling the shank and disposed beneath the head to be compressed between the latter and a workpiece as the shank is driven into the workpiece. The head includes a skirt engaging the washer, the underside of the skirt being concave and being formed with an annular rib. As the washer is compressed, the rib exerts a downward force and produces a sealing circle between the washer and the workpiece. At the same time, the inner side of the rib forces the washer downwardly and inwardly to form a seal around the shank. The outer side of the rib forces the washer downwardly and outwardly against a flange on the periphery of the skirt, the flange trapping and retaining the washer in the space defined by the underside of the skirt.

467048

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