Boron nitride seal and method of use

Details Boron nitride seal and method of use Boron nitride seal and method of use

1995-12-29

1997-10-21

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277DIG6, 501 96, F16J 1502, C04B 3564

Patent

active

056788320

ABSTRACT:
Boron nitride formed to an optimum density and composition of soluble borates and oxygen forms a material which deforms under pressure and reforms to make a very low permeability seal. The boron nitride seal is formed by precompacting a boron nitride powder having a soluble borate concentration of between 0.5 and 1.90% by weight, hot pressing the powder to a density of about 1.85 g/cc and machining the hot pressed powder into a seal of desired shape.

REFERENCES:
patent: 4634640 (1987-01-01), Hunold et al.
patent: 5010045 (1991-04-01), Maya
patent: 5116589 (1992-05-01), Hoenig
patent: 5328875 (1994-07-01), Ueda et al.
patent: 5462291 (1995-10-01), Maeda et al.

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