Fluid handling – With leakage or drip collecting
Reexamination Certificate
2008-09-23
2008-09-23
Hepperle, Stephen M. (Department: 3753)
Fluid handling
With leakage or drip collecting
C251S214000, C277S320000
Reexamination Certificate
active
11366299
ABSTRACT:
A redundant sealing system with secondary containment for preventing leakage of fluid along a valve shaft is provided. The system comprises a first set of dynamic seals, a second set of dynamic seals, an auxiliary barrier fluid chamber, and a barrier fluid indicator. The first and second set of dynamic seals are in spaced relation to each other a distance equal to or further than a maximum stroke length of an actuatable valve stem. The auxiliary barrier fluid chamber is interposed between the first and second sets of dynamic seals. The barrier fluid indicator has a piston in a primary barrier fluid chamber. A first face of the piston is exposed to the auxiliary barrier fluid chamber. A second face of the piston is exposed to a barrier fluid and inhibited from fluid communication with the auxiliary barrier fluid chamber by a dynamic seal in the first set of dynamic seals.
REFERENCES:
patent: 1593533 (1926-07-01), Joyce
patent: 1636752 (1927-04-01), Mitchell
patent: 1721737 (1929-07-01), Joyce
patent: 1779938 (1930-10-01), Joyce
patent: 1835887 (1931-12-01), Mackey
patent: 2427656 (1947-09-01), Blom
patent: 3176996 (1965-04-01), Barnett
patent: 3297329 (1967-01-01), Smith et al.
patent: 3334906 (1967-08-01), Arnold
patent: 3589737 (1971-06-01), Sedy
patent: 3648718 (1972-03-01), Curran
patent: 3770247 (1973-11-01), Nelson
patent: 3774877 (1973-11-01), Robertson
patent: 3830306 (1974-08-01), Brown
patent: 3869131 (1975-03-01), Derner
patent: 3887195 (1975-06-01), Vinciguerra
patent: 3954348 (1976-05-01), Renaud
patent: 3955822 (1976-05-01), Irby
patent: 3958592 (1976-05-01), Wells
patent: 4222575 (1980-09-01), Sekiguchi et al.
patent: 4289445 (1981-09-01), Sims
patent: 4290611 (1981-09-01), Sedy
patent: 4295653 (1981-10-01), Coles
patent: 4354664 (1982-10-01), Taylor et al.
patent: 4384820 (1983-05-01), Sims
patent: 4475735 (1984-10-01), Smuda et al.
patent: 4483141 (1984-11-01), Kobayashi et al.
patent: 4505115 (1985-03-01), Arbuckle
patent: 4509897 (1985-04-01), Sims
patent: 4552369 (1985-11-01), Stewart et al.
patent: 4623151 (1986-11-01), Kashiwamura et al.
patent: 4702269 (1987-10-01), Schuler
patent: 4819948 (1989-04-01), Merrifield
patent: 4858937 (1989-08-01), Fairlie-Clarke et al.
patent: 4915579 (1990-04-01), Whittier et al.
patent: 4922719 (1990-05-01), Arbuckle
patent: 4960039 (1990-10-01), Robertson
patent: 5052720 (1991-10-01), Yoda
patent: 5170659 (1992-12-01), Kemp
patent: 5178363 (1993-01-01), Icenhower et al.
patent: 5203370 (1993-04-01), Block et al.
patent: 5209495 (1993-05-01), Palmour
patent: 5211532 (1993-05-01), Thompson
patent: 5244183 (1993-09-01), Calvin et al.
patent: 5305854 (1994-04-01), Wheeler
patent: 5412977 (1995-05-01), Schmohl et al.
patent: 5474307 (1995-12-01), DeBiasse et al.
patent: 5519295 (1996-05-01), Jatnieks
patent: 5562406 (1996-10-01), Ooka et al.
patent: 5607165 (1997-03-01), Bredemeyer
patent: 5636847 (1997-06-01), Ostrowski
patent: 5643026 (1997-07-01), Pietsch et al.
patent: 5676382 (1997-10-01), Dahlheimer
patent: 5746435 (1998-05-01), Arbuckle
patent: 5772216 (1998-06-01), Bredemeyer
patent: 5823541 (1998-10-01), Dietle et al.
patent: 5906374 (1999-05-01), Arbuckle
patent: 5921554 (1999-07-01), Derian et al.
patent: 6062570 (2000-05-01), Erickson
patent: 6161835 (2000-12-01), Arbuckle
patent: 6161838 (2000-12-01), Balsells
patent: 6162031 (2000-12-01), Tremoulet, Jr.
patent: 6210107 (2001-04-01), Volden et al.
patent: 2004/0134665 (2004-07-01), Greeb
patent: 0308390 (1989-03-01), None
patent: 0499745 (1992-08-01), None
patent: 1012081 (2001-10-01), None
patent: 1231418 (2002-08-01), None
patent: 1239197 (2002-09-01), None
patent: 57116974 (1982-07-01), None
patent: 5001776 (1993-01-01), None
patent: 5106746 (1993-04-01), None
patent: WO 96/10707 (1996-04-01), None
patent: WO 97/13713 (1997-04-01), None
patent: WO 97/34095 (1997-09-01), None
patent: WO 03/021142 (2003-03-01), None
U.S. Appl. No. 60/096,877, filed Aug. 17, 1998, Arbuckle.
U.S. Appl. No. 60/096,738, filed Aug. 17, 1998, Arbuckle.
U.S. Appl. No. 10/440,507, filed May 15, 2003, Burdick et al.
U.S. Appl. No. 10/715, 708, filed Nov. 18, 2003, Greeb et al.
Burdick Wade A.
Gessaman Jeff A
Greeb Kevin E.
Stumbo Steven Charles
Hepperle Stephen M.
Reinhart Boerner Van Deuren P.C.
Rost Andrew J
Woodward Governor Company
LandOfFree
Fully independent, redundant fluid energized sealing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fully independent, redundant fluid energized sealing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fully independent, redundant fluid energized sealing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3958495