Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Tie rod tensioner
Reexamination Certificate
2003-04-22
2009-06-30
Wilson, Lee D (Department: 3727)
Implements or apparatus for applying pushing or pulling force
Pipe or rod jack
Tie rod tensioner
C269S032000, C254S0930VA
Reexamination Certificate
active
07552912
ABSTRACT:
A fluid pressure nut16has a first load supporting member17disposed in a flange13aand a second load supporting member18axially movably attached to the first load supporting member17,wherein the second load supporting member18is screw-connected to a bolt15in a screw hole28.A pressure chamber is provided between the first load supporting member17and the second load supporting member18,and a seal ring44is attached to an end portion of a pressure chamber27.The seal ring44includes a first curve portion contacting with the first load supporting member17,a second curve portion contacting with the second load supporting member18,and a pressure receiving portion continuing into the first and second curve portions, wherein pressure applied to the pressure receiving portion is converted into axial-directional sealing forces of the curve portions.
REFERENCES:
patent: 4062254 (1977-12-01), Fredriksson
patent: 4708036 (1987-11-01), Vossbrinck
patent: 4840526 (1989-06-01), Bourdonné
patent: 4998453 (1991-03-01), Walton et al.
patent: 5527015 (1996-06-01), Percival-Smith
patent: 5690458 (1997-11-01), Junkers
patent: 5803436 (1998-09-01), Hohmann et al.
patent: 6736384 (2004-05-01), Yokota
patent: 2006/0202401 (2006-09-01), Shinozaki
patent: 2007/0051101 (2007-03-01), Imai et al.
patent: 2 263 739 (1993-08-01), None
patent: 51-8151 (1976-01-01), None
patent: 52-22654 (1977-02-01), None
patent: 54-108860 (1979-07-01), None
patent: 59-155315 (1984-10-01), None
patent: 59-180166 (1984-10-01), None
patent: 62-261705 (1987-11-01), None
patent: 63-106960 (1988-07-01), None
patent: 02-300508 (1990-12-01), None
patent: 6-264909 (1994-09-01), None
patent: 3012347 (1995-04-01), None
patent: 2000-504401 (2000-04-01), None
patent: 2002-538389 (2002-11-01), None
patent: 00/65243 (2000-11-01), None
European Search Report for Serial No. EP 03 72 5620 dated Mar. 7, 2006.
Goda Tatsuo
Imai Akira
Imai Atsushi
Imai Yutaka
Imai Akira
Imai Atsushi
Imai Satoshi
Imai Tooru
Imai Yutaka
LandOfFree
Fluid pressure device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid pressure device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid pressure device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4070496