Contoured shaft seal for high pressure applications

Details Contoured shaft seal for high pressure applications Contoured shaft seal for high pressure applications

1984-08-09

1985-12-24

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277152, 277153, F16J 1532

Patent

active

045601771

ABSTRACT:
A fluid seal unit for high pressure sealing applications. The seal has a rigid casing and an annular elastomeric sealing lip body which includes a primary seal band contacting a shaft in sealing engagement when the fluid in the sealed region is under a first pressure. The air side surface of the lip body also has auxiliary sealing ribs and fluid retaining grooves of progressively increasing diameter. When the pressure in the sealed region increases, one or more additional ribs will contact the shaft to provide increased seal band contact area and to entrap additional fluid near the shaft.

REFERENCES:
patent: 2804325 (1957-08-01), Riesing
patent: 3913925 (1975-10-01), Gyory
patent: 3923315 (1975-12-01), Hadaway
patent: 4102538 (1978-07-01), Bertin
patent: 4126320 (1978-11-01), Pendleton
patent: 4254960 (1981-03-01), Jelinek
patent: 4432557 (1984-02-01), Drucktenhengst
patent: 4501431 (1985-02-01), Peisker et al.

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