Wave seal to resist extrusion during equalization

Details Wave seal to resist extrusion during equalization Wave seal to resist extrusion during equalization

2005-05-31

2005-05-31

Look, Edward K. (Department: 3751)

Valves and valve actuation

Reciprocating valve

Piston

C251S344000, C166S316000

Reexamination Certificate

active

06899318

ABSTRACT:
The present invention provides for dynamic sealing in a flow control device. In an embodiment, the flow control device comprises a closure sleeve adapted to slide over the tubing hole. The closure sleeve has a front edge having a wave-like surface. One or more seals are mounted downstream of the tubing hole. The one or more seals cooperate in a fluid-tight manner with the closure sleeve. A protective sleeve is mounted in alignment with the closure sleeve and proximate to the one or more seals. The protective sleeve has a top edge adapted for mating engagement with the wave-like surface of the front edge of the closure sleeve. A return mechanism is provided for automatically returning the protective sleeve to a covering position in which the protective sleeve covers the first seal when the first seal is not covered by the closure sleeve.

REFERENCES:
patent: 3183009 (1965-05-01), Kunel
patent: 6056292 (2000-05-01), Gerigk
patent: 6325150 (2001-12-01), Rayssiguier

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