Mechanical seal

Details Mechanical seal Mechanical seal

1979-08-13

1980-12-30

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 76, 277 93SD, F16J 1538

Patent

active

042419271

ABSTRACT:
An improved mechanical seal in which the elastomer U-cup has a controlled contact area with a rotating member and the cavity for receiving the U-cup is contoured without the conventional, relatively sharp axially extending lip. A low coefficient of friction exists between the U-cup and the rotating member, providing improved life to the seal assembly.
The cavity in one of the seal rings is formed with defining walls having portions normal to each other and to the intersected surfaces of the seal ring, one of the defining surfaces being normal to the rotatable shaft. The U-cup has a surface in full contact with the cavity defining wall; the controlled contact area being a cylindrical surface contacting the rotatable shaft.

REFERENCES:
patent: 2378095 (1945-06-01), Payne
patent: 2928685 (1960-03-01), Tracy
patent: 3042414 (1962-07-01), Tracy
patent: 3433489 (1969-03-01), Wiese
patent: 3486760 (1969-12-01), Tracy
patent: 3897957 (1975-08-01), Warner

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