Fastener for securing and sealing sheet material in spaced relat

Details Fastener for securing and sealing sheet material in spaced relat Fastener for securing and sealing sheet material in spaced relat

1977-10-11

1980-02-26

Bonck, Rodney H.

85 1JP, F16B 1304, F16B 2900

Patent

active

041899792

ABSTRACT:
A fastener assembly including a screw threaded fastener which has a rigid expander positioned around its shank below the head. A resilient washer having an outwardly directed flange is then provided on the fastener shank and the assembly is completed by a rigid spacer. In use, the fastener is applied to secure a roofing sheet for example to a purlin with the spacer supporting the sheet away from the purlin so as to accommodate relatively soft insulation material disposed between. The expander is forced into the sealing washer during tightening of the fastener to form a water tight seal.

REFERENCES:
patent: 784845 (1905-03-01), Evans
patent: 2014451 (1935-09-01), Pfeifer
patent: 2203178 (1940-06-01), Peirle
patent: 2277885 (1942-03-01), Rodanet
patent: 2385126 (1945-09-01), Benton
patent: 3503584 (1970-03-01), Erhart et al.
patent: 3578506 (1971-05-01), Chassoux
patent: 3739684 (1973-06-01), Vitkevich
patent: 3889569 (1975-06-01), Fanciullo

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