High temperature low friction seal

Details High temperature low friction seal High temperature low friction seal

1989-08-23

1990-08-28

Thomas, Alexander S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277229, 277DIG6, 428 65, 428247, 428254, 428256, 264320, 264324, 264501, 264512, 264516, B32B 3106, B32B 528, F16J 1512

Patent

active

049519549

ABSTRACT:
A high temperature low friction dynamic seal includes a wire mesh base portion and a compressed shell portion on the base portion. The shell portion includes between approximately 2% and 30% of high aspect ratio vermiculite having a mean particle size of less than approximately 50 microns, between approximately 10% and 88% of high temperature resistant fibers and between approximately 10% and 88% of one or more a solid lubricants selected from a group consisting of barium fluoride, calcium fluoride, cerium fluoride and a eutectic of barium fluoride and calcium fluoride. The method of forming the seal includes the steps of forming a compressed wire mesh base portion, applying an aqueous paste-like mixture of the shell portion components to the base portion, evaporating the water from the shell portion and compressing the shell portion and the base portion.

REFERENCES:
patent: 2116000 (1938-05-01), Peterson
patent: 4271228 (1981-06-01), Foster et al.
patent: 4425465 (1984-01-01), Padget et al.
patent: 4477094 (1984-10-01), Yamamoto et al.
patent: 4559249 (1985-12-01), Arigaya et al.
patent: 4601476 (1986-07-01), Usher et al.

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