Static structures (e.g. – buildings) – Disparate sheet lamina between exposed surfaces of wall,... – Tie crossing dividing lamina
Patent
1987-02-17
1988-07-19
Bell, J. Karl
Static structures (e.g., buildings)
Disparate sheet lamina between exposed surfaces of wall,...
Tie crossing dividing lamina
411533, 52512, E04D 336, F16J 1510
Patent
active
047576618
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. In an alternative embodiment sloping ribs guide a fastener head into snapping engagement with an inwardly projecting lip. In all embodiments a resilient rib is disposed on a shoulder formed in 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), Sandquist
patent: 4380413 (1983-04-01), Dewey
patent: 4630984 (1986-12-01), Reinwall et al.
patent: 4663910 (1987-05-01), Hasan
Bell J. Karl
Buckman T. W.
Illinois Tool Works Inc.
Roche D. I.
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