Dynamic sealing arrangement for movable shaft

Details Dynamic sealing arrangement for movable shaft Dynamic sealing arrangement for movable shaft

2006-10-06

2011-12-13

Patel, Vishal (Department: 3674)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S516000, C277S549000, C277S562000

Reexamination Certificate

active

08074999

ABSTRACT:
A dynamic sealing arrangement for preventing leakage of a fluid along a shaft includes multiple seals and pressurized barrier sealant is presented. According to one aspect, at least three seals are arranged along the shaft with pressurized barrier sealant between the first and second seals and a collection area is provided between the second and third seals to collect any leakage that might occur. Collected leakage, if any, is ported to an output port. According to another aspect, a unitary seal block member is provided that supports the dynamic sealing arrangement for the shaft and defines a piston chamber and a drilled passageway connecting the piston chamber and barrier sealant pressurization chamber between two seals. A substantial amount of plumbing is self contained in a single body minimizing the need for additional components or complexity.

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