Fluid sprinkling – spraying – and diffusing – With fixed support for or ground installed supply means – Embedded or buried sprinkler
Reexamination Certificate
2007-11-13
2007-11-13
Nguyen, Dinh Q. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
With fixed support for or ground installed supply means
Embedded or buried sprinkler
C239S203000, C239S205000, C239S570000, C239S579000, C137S071000, C251S149200
Reexamination Certificate
active
10973546
ABSTRACT:
A check valve assembly has a coupling sleeve with a first end for connection to a pop-up or fixed sprinkler head and a second end for connection to a water supply, the coupling sleeve incorporating a valve seat. A disc valve is retained below the valve seat, and a separate actuator is movably mounted above the seat for movement between an operative position extending through the valve seat to hold the valve in the open position, and an inoperative, retracted position. The disc valve is retained against the valve seat around its peripheral edge, and has a central portion which is moved by the actuator into the open position when the sprinkler head is properly connected to the coupling sleeve. Release or removal of the actuator as a result of removal of the sprinkler head will allow fluid pressure at the second end of the coupling sleeve to urge the valve into the closed position.
REFERENCES:
patent: 1432386 (1922-10-01), Curney
patent: 4064889 (1977-12-01), Gayle et al.
patent: 4143853 (1979-03-01), Abramson
patent: 4171775 (1979-10-01), Unruh
patent: 4316579 (1982-02-01), Ray et al.
patent: 4479611 (1984-10-01), Galvis
patent: 4562962 (1986-01-01), Hartman
patent: 4699321 (1987-10-01), Bivens et al.
patent: 4736889 (1988-04-01), Stephenson
patent: 4830046 (1989-05-01), Holt
patent: 4842198 (1989-06-01), Chang
patent: 4848661 (1989-07-01), Palmer et al.
patent: 4852602 (1989-08-01), McKinnon
patent: 4867603 (1989-09-01), Chang
patent: 4944327 (1990-07-01), Gyben
patent: 5174500 (1992-12-01), Yianilos
patent: 5335857 (1994-08-01), Hagon
patent: 5372306 (1994-12-01), Yianilos
patent: 5758682 (1998-06-01), Cain
patent: 5857487 (1999-01-01), Carson et al.
patent: 6000632 (1999-12-01), Wallace
patent: 6024175 (2000-02-01), Moore et al.
patent: 6029749 (2000-02-01), Reilly et al.
patent: 6138924 (2000-10-01), Hunter et al.
patent: 6158520 (2000-12-01), Reilly et al.
patent: 6178982 (2001-01-01), Longstreth
patent: 6179221 (2001-01-01), Goldberg et al.
patent: 6263912 (2001-07-01), Brown et al.
patent: 6536533 (2003-03-01), Reilly
patent: 6536534 (2003-03-01), Sundholm
patent: 6568608 (2003-05-01), Sirkiin
patent: 6682106 (2004-01-01), Parker
Gordon & Rees LLP
Nguyen Dinh Q.
LandOfFree
Check valve assembly for sprinkler head does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Check valve assembly for sprinkler head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Check valve assembly for sprinkler head will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3821693