Washer with resilient head cripping means

Details Washer with resilient head cripping means Washer with resilient head cripping means

1987-03-30

1987-12-15

Bell, J. Karl

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Washer structure

Including means for retaining washer to fastener

52410, 52512, 411368, F16J 1510, E04D 336

Patent

active

047129590

ABSTRACT:
A washer for attaching insulation to a roof member over which roofing membrane is to be placed. The washer includes a laterally extending apertured flange and an upstanding hollow cylindrical protrusion adapted to snappingly engage the head of a fastener used with the washer. The protrusion has an inwardly extending lip on the inside surface of the free end of the protrusion. A resilient rib is disposed between the protrusion and the aperture in the washer. The rib resiliently urges the head of the fastener into engagement with the lip. The washer includes a downwardly extending hub, which may be equipped with means for retaining the washer in a batten strip.

REFERENCES:
patent: 4074501 (1978-02-01), Sandqvist
patent: 4361997 (1982-12-01), De Caro
patent: 4380413 (1983-04-01), Dewey
patent: 4545270 (1985-10-01), Dewey
patent: 4587377 (1986-05-01), Rodseth
patent: 4630984 (1986-12-01), Reinwall et al.
patent: 4663910 (1987-05-01), Hasan

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