Stress plate for roof membrane fastener assembly
OwnerStuart H. Lemkeinventor
Life of this patent
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Abstract
A disc-shaped stress plate to be utilized with a fastener having an elongated shank integral with a disc-shaped head includes a disc having an upper and lower surface with an indentation in the upper surface and a protrusion on the lower surface. The disc can also be provided with a plurality of gripping teeth on its bottom surface and a plurality of friction enhancing protrusions on its upper surface.
Claims17
A stress plate adapted for use with a fastener, which fastener has an elongated shank and an enlarged diameter head at one end of said shank, for securing a roof membrane to a roof deck, said plate having:
- top and bottom surfaces,
- a central hole configured to allow the fastener shank to fit therethrough but of lesser diameter than the fastener head;
- a formation of upright, pointed teeth extending from said bottom surface;
- and
- a series of non radial ribs extending from said bottom surface, which ribs are shorter than said teeth.
A stress plate adapted for use with a fastener, which fastener has an elongated shank and an enlarged diameter head at one end of said shank, for securing a roof membrane to a roof deck, said stress plate having:
- generally flat, top and bottom surfaces;
- a central hole configured to allow the fastener shank to fit therethrough but having a lesser diameter than the fastener head;
- a formation of pointed teeth extending from said bottom surface disposed in at least two, inner and outer circles concentrically disposed about said central hole, said teeth being staggered in the radial direction of said disk;
- and
- a series of annular ribs shorter than said teeth and concentrically disposed about said central hole, said ribs extending from said bottom surface in radially spaced positions outwardly of said inner circle of teeth.
Dependencies are inferred from the claim text.