Annular support for a seal for a tilt piston

Details Annular support for a seal for a tilt piston Annular support for a seal for a tilt piston

1990-07-16

1991-11-12

Bertsch, Richard A.

Pumps

Expansible chamber type

Control by withdrawal or tilting of pump piston relative to...

277205, 277212C, 92240, 92241, 417553, F04B 0704

Patent

active

050643592

ABSTRACT:
An apparatus includes a tilt piston having a piston head. The piston head is reciprocally disposed within a cylindrical bore formed in a housing, the bore being oriented along an axis. A seal is mounted circumferentially about the piston head. The seal has an outer diameter that exceeds an inner diameter of the cylindrical bore. The seal extends radially in a first direction having an axial component. A support is mounted circumferentially of the piston head adjacent the seal. The support has an outer diameter less than the outer diameter of the seal. The seal is a continuous annular ring which may be of a circular or rectangular cross section. The seal and the support may be formed as a unitary member or may be two distinct elements. The support contacts the bore during a portion of travel of the piston within the bore.

REFERENCES:
patent: 145921 (1873-12-01), Wharton
patent: 3143934 (1964-08-01), Nelson
patent: 4027816 (1977-06-01), Slator et al.
patent: 4317408 (1982-03-01), Williams
patent: 4516481 (1985-05-01), Geffroy et al.
patent: 4618153 (1986-10-01), Nillson
patent: 4674754 (1987-06-01), Lair et al.

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