Annular valve

Details Annular valve Annular valve

2006-07-18

2006-07-18

Scherbel, David A. (Department: 3751)

Valves and valve actuation

Permanent or constantly energized magnet actuator

C251S129150

Reexamination Certificate

active

07077378

ABSTRACT:
A valve assembly (1) operable to allow or prevent the flow of fluid to or from a working chamber of a fluid-operated machine, comprising radially spaced apart inner and outer annular valve seats (8, 15) defining an annular passage therebetween, a valve member comprising a sealing ring (21), and means (3, 7, 26, 25) for moving the valve member axially between a first position in which the sealing ring (21) is in seating engagement with the annular valve seats to close the annular passage to fluid flow therethrough and a second position in which the sealing ring (21) is spaced from the annular valve seats (8, 15) so that the annular passage is open to fluid flow therethrough. The valve assembly further comprises axially spaced apart first and second valve guide means (6) for guiding the valve member during axial movement between its first and second positions.

REFERENCES:
patent: 1925464 (1933-09-01), Schoene
patent: 3438394 (1969-04-01), Nakib
patent: 3845782 (1974-11-01), Nicholls et al.
patent: 5273068 (1993-12-01), Durne
patent: 5441679 (1995-08-01), Chalich
patent: 5673656 (1997-10-01), Knob
patent: 503771 (1930-07-01), None
patent: 8425037 (1985-08-01), None
patent: 514546 (1921-03-01), None
patent: 251472 (1926-05-01), None
patent: 1104308 (1968-02-01), None
patent: 60448 (1947-08-01), None

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