The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2001
Filed:
Mar. 11, 1998
Kenneth R. Albertson, West Valley City, UT (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
Fluid sealing system for installation within an assembly including a stationary machine part having a generally annular surface, and a reciprocable machine part having a generally cylindrical surface disposed concentrically with the annular surface of the stationary machine part. The system includes annular primary and secondary seal members each configured to be received within a corresponding gland of the annular surface coaxially intermediate the cylindrical surface of the movable machine part and a peripheral wall of the glands. The primary seal member has axially spaced-apart upper and lower end faces, and radially spaced-apart inner and outer diameter faces. The inner diameter face is formed to contact the cylindrical surface of the movable machine part along at least one dynamic sealing surface, and the outer diameter face is formed to contact the peripheral side wall of the gland along at least one static sealing surface. In turn, the upper end face is axially bifurcated into an inner portion and an outwardly-directed valving portion having an outer surface which defines the static sealing surface of the primary seal member. The valving portion is actuable responsive to fluid pressure developed intermediate the primary and secondary seal members to open a fluid passageway between the valving portion outer surface and the gland peripheral wall admitting the fluid pressure to an upstream, high pressure side of the assembly. Fluid communication is provided between the fluid pressure developed intermediate the primary and secondary seal members and the fluid passageway.