Polymeric combination washer and nut
First Claim
1. A combination nut and washer which comprises:
- a generally cylindrical nut body having a cylindrical axial cavity including an open end and a closed end;
an open axial vent hole extending through said closed end;
said cavity being internally threaded;
the exterior of said cylindrical nut body having a surface adapted to be griped by a tool for rotating said nut body;
a transversely outwardly extending washer portion integral with said body and adjacent to the open end of said cavity;
said washer having a flat outer surface substantially perpendicular to said body axis; and
said integral nut body and washer portion being formed from a high strength synthetic polymer.
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Accused Products
Abstract
An integral nut and washer formed from a fiber reinforced polymeric material that is particularly useful for use in water tanks and the like that are bolted together from overlapping metal plates. The combination includes a generally cylindrical nut body having an internally threaded cavity, with a transversely extending washer portion around the opening. At least one pair of opposed flats are provided on the nut body for tightening the nut with a conventional wrench. An axial vent is provided at the closed end of the cavity to allow air or excess sealant, where sealant is used, to escape as the nut is tightened. The entrance into the threaded cavity is chamfered, and the washer portion is tapered back along the nut portion for maximum washer strength. Preferably, the integral nut and washer is formed from a glass fiber reinforced polyurethane material by injection molding. This nut is durable and does not corrode in use. It also eliminates rust streaks when used on the exterior of tanks and rust contamination when used on a tank interior.
44 Citations
19 Claims
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1. A combination nut and washer which comprises:
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a generally cylindrical nut body having a cylindrical axial cavity including an open end and a closed end; an open axial vent hole extending through said closed end; said cavity being internally threaded; the exterior of said cylindrical nut body having a surface adapted to be griped by a tool for rotating said nut body; a transversely outwardly extending washer portion integral with said body and adjacent to the open end of said cavity; said washer having a flat outer surface substantially perpendicular to said body axis; and said integral nut body and washer portion being formed from a high strength synthetic polymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A combination nut and washer which comprises:
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a generally cylindrical nut body having a cylindrical axial cavity having an open end and a closed end; said cavity being threaded and having a chamfered open end; the generally cylindrical nut body having a plurality of opposed flat areas parallel to the axis of said body; an open axial vent hole through the closed end of said cavity; a transversely outwardly extending washer portion integral with said body adjacent to the open end of said cavity; said washer having a flat outer surface substantially perpendicular to said body axis; and said integral nut body and washer portion being formed from a fiber reinforced high strength polymer. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification