Mechanical seal using pore-dispersed material, and pore-disperse

Details Mechanical seal using pore-dispersed material, and pore-disperse Mechanical seal using pore-dispersed material, and pore-disperse

1990-03-19

1991-03-05

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 962, 277DIG6, F16J 1520, F16J 1534

Patent

active

049971921

ABSTRACT:
A mechanical seal is, at a sliding surface and at its vicinty, formed of a pore-dispersed cemented carbide, so that the lubricating characteristics can be improved and the strength maintained by strictly stipulating the magnitude, shape, and volumetric ratio of the pores, such that pores are contained in an amount of 0.5 to 20 volume %, formed in at least one shape selected from the group of a substantialy spherical shape and a substantially cylindrical shape, the pores in the substantially spherical shape having an average diameter of 3 to 20 .mu.m, the pores in the substantially cylindrical shape having an average diameter of 3 to 20 .mu.m and an average length in the range from the average diameter up to 300 .mu.m, and that the pores are prevented from linking to each other to give a length greater than 2 mm.

REFERENCES:
patent: 3122375 (1964-02-01), Greenwald
patent: 3822066 (1974-07-01), Keys
patent: 3903959 (1975-09-01), Fushimi et al.
patent: 3926443 (1975-12-01), Fenerty et al.
patent: 4000980 (1977-01-01), Morishita et al.
patent: 4416458 (1983-11-01), Takenaka et al.
"Seals and Sealing Handbook": pp. 382-386, published 1981.

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