Composite washer

Claim 2

A composite washer comprising a dome-shaped metal member and a resilient member, said dome-shaped metal member having top and bottom surfaces and a central opening therethrough, said resilient member having two components, the first component being bonded to the metal member along the bottom surface thereof and extending from substantially adjacent the central opening to a point substantially inward of the outer periphery of the metal member, and the second component being in partially overlapping relationship with said first component, said second component also being bonded to the metal member along the bottom surface thereof and being positioned radially removed outward from the central opening and terminating short of the outer periphery of the metal member, said overlap being in a high portion of the dome.

Claim 3

The composite washer of claim 1 wherein the first component extends radially inward into the central opening.

Claim 4

The composite washer of claim 1 wherein the second component has an annular groove in its bottom surface.

Claim 5

The composite washer of claim 1 wherein the upper surface of the metal member is double bent in the area between the high portion of the dome and the outer periphery.

Claim 6

The composite washer of claim 1 wherein the inner surface of the metal member is inclined upwardly toward the central opening so that upon tightening of a fastener positioned within the central opening into a workpiece, the resilient member is urged toward the central opening and away from the outer periphery of the metal member.

Claim 7

The composite washer of claim 1 wherein the metal member terminates along its periphery in a downwardly extending annular lip so that, upon compression, the resilient member is prevented from deforming radially outward beyond the metal member.

Claim 8

The composite washer of claim 3 wherein the annular groove is positioned substantially midway between the ends of the second component.

Claim 9

In combination, a fastener and a washer, said washer including a dome-shaped metal member and a two component resilient member, said dome-shaped metal member having top and bottom surfaces and a central opening therethrough, the first component being bonded to the metal member along the bottom surface thereof and extending from radially within the central opening to a point substantially inward of the outer periphery of the metal member, and the second component being in partially overlapping relationship in the area of a high portion of the dome with said first component, said second component also being bonded to the metal member along the bottom surface thereof and being positioned radially removed outward from the central opening and terminating short of the outer periphery of the metal member, the fastener extending through the central opening and the washer being retained on the fastener by means of the portion of the first component extending radially into the central opening.

Claim 10

In combination, a fastener and a washer, said washer including a dome-shaped metal member and a two component resilient member, said dome-shaped metal member having top and bottom surfaces and a central opening therethrough, the first component being bonded to the metal member along the bottom surface thereof and extending from radially within the central opening to a point substantially inward of the outer periphery of the metal member, and the second component being in partially overlapping relationship in the area of a high portion of the dome with said first component, said second component also being bonded to the metal member along the bottom surface thereof and being positioned radially removed outward from the central opening and terminating short of the outer periphery of the metal member, the fastener extending through the central opening and the washer being retained on the fastener by means of the portion of the first component extending radially into the central opening.

Claim 11

The combination of claim 8 characterized by the resilient member completely filling the dome portion and the area adjacent the fastener in the central opening, including the area adjacent threads of the fastener when the combination is in a tightened position with respect to a workpiece.