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US 4,049,856 AGranted
Gaskets
AssigneeTBA Industrial Products Limited
InventorDavid John Adams
Life of this patent
Estimating the term…
Abstract
This invention relates to a metal-cored asbestos-rubber gasket wherein openings are formed in the gasket with the openings being defined by eyelets. The eyelets have flanges which engage the facing layers of the gasket and normal cracking of the eyelets incipient to incorporation thereof in the gasket is prevented by incorporating in the facing layer material microspheres in a sufficient amount to permit crushing thereof by the eyelet flanges under pressure.
Claims6
A metal-cored gasket comprising, in combination:
- a metal core;
- a facing layer bonded to each side of said core, at least one opening through said core and said facing layer, an eyelet in said opening, said eyelet having flanges seated in said facing layers in facing layer deforming relation, each facing layer consisting essentially of asbestos, rubber and microspheres, said rubber and asbestos being present in relative amounts so as to exhibit a compression set greater than 50% in the absence of said microspheres, said microspheres being present in amount up to 75% by volume and which amount is sufficient locally to modify said facing layer to permit crushing thereof by an associated eyelet flange at a pressure to protect said eyelet from incipient cracks incident to incorporation thereof in the gasket.
Dependencies are inferred from the claim text.