Head gaskets and method of making same
AssigneeFelt Products Mfg. Co.
InventorsDaniel E. Czernik, John C. Moerk, Jr.
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a cylinder head gasket comprising the steps of preassembling a main gasket body and a fire ring and then precompressing the gasket to alter the characteristics of one of the gasket body and fire ring, so that a portion of the available design head load will be taken up by each of the gasket body and fire ring when the precompressed gasket is assembled in an engine at the available design head load. The precompressed gasket fire ring displays different thickness and compression characteristics resulting from the precompression of the preassembled gasket, enhancing the capacity of the gasket effectively and consistently to seal a head and block at the available design head load.
Claims20
A method of manufacturing a cylinder head gasket assembly for use in sealing the head and block of an internal combustion engine comprising the steps of:
- providing a completed self-supporting unused gasket assembly having an expansive main gasket body comprising a compressible heat-resistant facing sheet and defining at least one combustion opening therein, and a fire ring at said combustion opening;
- then, prior to installation of said gasket assembly in an engine, in a press means applying a precompression load to said unused gasket assembly to compress said fire ring to alter the characteristics of said fire ring;
- and
- relieving said gasket assembly of said precompression load;
- and then removing said unused precompressed gasket assembly from said press means, whereby upon recompression of said gasket assembly in an engine at the available design head load, a portion of the head load will be taken up by each of the gasket body and fire ring to assure proper sealing by the head gasket assembly.
A method of manufacturing a cylinder head gasket assembly for use in sealing the head and block of an internal combustion engine comprising the steps of:
- providing a completed self-supporting unused gasket assembly having an expansive main gasket body comprising a compressible heat-resistant facing sheet and defining at least one combustion opening therein, and a fire ring at said combustion opening;
- then, prior to installation of said gasket assembly in an engine, in a press means applying a precompression load to said unused gasket assembly to compress each of said body and said fire ring to alter the characteristics of each of said body and said fire ring;
- and
- relieving said gasket assembly of said precompression load;
- and then removing said unused precompressed gasket assembly from said press means, whereby upon recompression of said gasket assembly in an engine at the available design head load, a portion of the head load will be taken up by each of the gasket body and fire ring to assure proper sealing by the head gasket assembly.
An unused head gasket assembly comprising a self-supporting assembled head gasket assembly comprising an expansive main gasket body having an expensive core having a pair of major surfaces and at least one compressible heat resistant facing sheet secured to a said major surface and together defining a clear-through combustion opening and a fire ring at said combustion opening, said fire ring having been of first thickness and compression characteristics when initially assembled, the improvement comprising said fire ring displaying second different thickness and compression characteristics resulting from the precompression of said unused self-supporting assembled head gasket assembly at a precompression load at least sufficient to precompress said fire ring to a thickness less than the uncompressed thickness of said body.
An unused head gasket assembly comprising a self-supporting assembled head gasket assembly comprising an expansive main gasket body having an expansive core having a pair of major surfaces and at least one compressible heat resistant facing sheet secured to a said major surface and together defining a clear-through combustion opening and a fire ring suspended in said combustion opening, each of said main gasket body and said fire ring having had first thicknesses and compression characteristics when initially assembled, the improvement comprising said main gasket body and said fire ring each displaying second different compression characteristics and said fire ring having a different lesser thickness resulting from the precompression of said unused self-supporting assembled head gasket assembly at a precompression load at least sufficient to precompress said fire ring to a thickness less than the first thickness.
Dependencies are inferred from the claim text.