Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2008-08-01
2011-10-25
Lee, Kevin (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625300, C137S883000, C251S127000, C175S048000
Reexamination Certificate
active
08042572
ABSTRACT:
A controllable pressure reducing valve has a housing which includes an inner chamber extending in the direction of a longitudinal axis and an inlet opening and an outlet opening. The inlet opening and the outlet opening open into the inner chamber at an axial relative distance. The inner chamber includes between the mouths of the inlet opening and the outlet opening at least one annular wall having a cylindrical valve bore. An axially movable valve body which is arranged in the inner chamber, extends through the valve bore and has a piston-type portion guided in the valve bore and adapted to close the valve bore. The piston-type portion includes at least one control recess bounded by a control step which extends in axial direction and in circumferential direction and combines with an edge of the valve bore to form a controllable valve opening.
REFERENCES:
patent: 3252480 (1966-05-01), Odendahl et al.
patent: 3880399 (1975-04-01), Luthe
patent: 4634095 (1987-01-01), Taylor
patent: 5615708 (1997-04-01), Barron
patent: 5673751 (1997-10-01), Head et al.
patent: 5947801 (1999-09-01), Weber
patent: 5963138 (1999-10-01), Gruenhagen
patent: 6615868 (2003-09-01), Ueki
patent: 7455115 (2008-11-01), Loretz et al.
patent: 1 107 471 (1961-05-01), None
patent: 1 147 450 (1963-04-01), None
patent: 32 15 224 (1983-11-01), None
patent: 37 44 730 (1989-04-01), None
patent: 0 744 527 (1996-11-01), None
patent: 2 087 951 (1982-06-01), None
patent: 2 213 286 (1989-08-01), None
patent: WO 2004/109171 (2004-12-01), None
British Search Report dated Dec. 9, 2008.
Draeger Uwe
Winnacker Helmut
Collard & Roe P.C.
Lee Kevin
Weatherford Energy Services GmbH
LandOfFree
Controllable pressure-reducing valve and device for the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Controllable pressure-reducing valve and device for the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controllable pressure-reducing valve and device for the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4260222