Sealing washer for high torque spinning bolt-head outdoor uses

Claim 2

A weather resistant sealing washer for outer wall or roof uses, said sealing washer being of thermoplastic material having an opening therethrough for receiving the shank of a bolt, said washer being very slick for use in application beneath a bolthead which is spun while being tightened at a high torque, said washer material having a durometer range of 50 to 85 shore, said washer having an upper end and a lower end, said washer having an axis extending through a center of said washer opening, said washer having a lower section which has an outer surface tapering from a lower portion of lesser diameter to an upper portion of greater diameter so as to wedge into an opening in a work-piece, said washer having an upper section and having an intermediate flange section disposed between said upper and lower sections, the uppermost part of said upper section being of substantially consex configuration and of a lesser diameter than the maximum diameter of said intermediate section.

Claim 3

The sealing washer of claim 1 in which said thermoplastic material is high density linear polyethylene.

Claim 4

The combination of claim 1 in which said thermoplastic material is specifically high density linear polyethylene and the specific gravity is between 0.941 and 0.965.

Claim 5

The sealing washer of claim 1 in further combination with two pieces of lapping sheet metal having at least partially aligned holes respectively, a bolt having a head against which the upper end of said washer is disposed, and having a threaded shank receiving said washer thereon, said shank extending through said holes, and a nut around said bolt and on the opposite side of said sheet metal pieces from said washer and head, a lower portion of said washer extending at least partially into the hole of the respective adjacent piece of sheet metal, said shank threads having groove surfaces substantially spaced from the walls of the holes in both of said pieces.

Claim 6

The sealing washer of claim 4 in which said intermediate flange section extending radially outwardly beyond the head of the bolt.

Claim 7

The sealing washer of claim 1 in which said upper section is provided with an outer surface tapering from an uppermost portion of smaller diameter to a lowermost portion of larger diameter.

Claim 8

The sealing washer of claim 1 in which said intermediate section has a substantially planar annular upper surface projecting beyond said upper section and a substantially planar lower surface projecting beyond said annular lower surface, said substantially planar upper and lower surfaces of said intermediate section being disposed substantially in planes at right angles to the axis of said washer.

Claim 9

The sealing washer of claim 7 in which the exterior of said intermediate section has an outer cylindrical terminal edge symmetrical about said axis and extending between the upper and lower substantially planar surfaces of said intermediate section.

Claim 10

The sealing washer of claim 1 in further combination with a bolt having a substantially cylindrical threaded shank portion extending through said washer.

Claim 11

The sealing washer of claim 1 further comprising said washer having a protrusion means extending inwardly from the wall of said opening, said protrusion means being of a size to assist in holding said washer on a bolt of less size than the average in a group of bolts in an allowable shank diameter tolerance range, said range being at least three-thousandths of an inch, and said protrusion means also being of a size for having sufficient weakness that said protrusion means becomes sufficiently changed by a bolt passing through said washer past said protrusion means so as to permit said bolt to pass by said protrusion means, said washer being sufficiently free of any portion of said protrusion means in that portion of the inner wall of said washer opening which is disposed at one end of said opening as to permit a bolt to freely enter said one end of said opening for a distance of at least one and one-half sixty-fourths of an inch so as to substantially reduce misalignments of bolt shanks with openings in such washers during machine assembly.

Claim 12

The sealing washer of claim 1 in which said durometer range is 60 to 70 shore.

Claim 13

The sealing washer of claim 1 in which said outer surface of said lower section makes an angle with said axis of approximately 30*.

Claim 14

The sealing washer of claim 1 in which said tapering lower section has a vertical depth of approximately three-sixteenths of an inch.