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Class Information
Number: 137/515.7
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > In couplings for coaxial conduits, e.g., drill pipe check valves > Valve seat clamped between coupling elements
Description: Devices in which the valve seat element is clamped between separable elements of the coupling means.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8668478 Compressor having a shutdown valve Mar. 11, 2014
8267162 Bi-directional pressure relief valve for a plate fin heat exchanger Sep. 18, 2012
8061381 Sucker rod pump with improved ball and seat Nov. 22, 2011
7959421 Compressor having a shutdown valve Jun. 14, 2011
7874307 Check valve and method of use Jan. 25, 2011
7600532 Check valve having integrally formed seat and seal body Oct. 13, 2009
7484526 Sanitary check valve Feb. 3, 2009
7287545 Sanitary check valve Oct. 30, 2007
6622795 Flow actuated valve for use in a wellbore Sep. 23, 2003
6192926 Safety valve especially for pneumatic circuits Feb. 27, 2001
6152171 Check valve Nov. 28, 2000
6123340 Modular flow devices Sep. 26, 2000
6105609 Filtered check valve assembly Aug. 22, 2000
6039073 Check valve Mar. 21, 2000
6024121 Check valve Feb. 15, 2000
6019127 Structure for connecting filler tube to fuel tank Feb. 1, 2000
5960822 Step valve Oct. 5, 1999
5950670 Vacuum cup safety device Sep. 14, 1999
5819792 Check ball valve seat Oct. 13, 1998
5713389 Check valve and check valve seat Feb. 3, 1998
5697382 Heart valve assembly method Dec. 16, 1997
5664602 Check valve for meter run Sep. 9, 1997
5522423 Forged body full port swing check valve Jun. 4, 1996
5522885 Assembly tooling for an autologous tissue heart valve Jun. 4, 1996
5469884 Check valve for meter run Nov. 28, 1995
5443091 Non-return valve with improved line connecting mechanism Aug. 22, 1995
5423887 Rapid assembly, concentric mating stent, tissue heart valve with enhanced clamping and tissue alignment Jun. 13, 1995
5411049 Valve May. 2, 1995
5368069 Conduit joint assembly Nov. 29, 1994
5297579 Ball and seat-type check valve for downhole rod pump Mar. 29, 1994
5240037 Gas line check valve Aug. 31, 1993
5232014 Check valve Aug. 3, 1993
5143117 Break away check valve Sep. 1, 1992
5117861 Ball and seat-type valve for downhole rod pump Jun. 2, 1992
5000223 Swing check valve with secured cage Mar. 19, 1991
4993452 Low pressure check valve Feb. 19, 1991
4982759 Swing check valve with secured cage Jan. 8, 1991
4977924 Swing check valve with secured cage Dec. 18, 1990
4971103 Swing check valve with secured cage Nov. 20, 1990
4905728 Swing check valve with hinge pin retainer Mar. 6, 1990
4896695 Check valve Jan. 30, 1990
4872479 Swing check valve Oct. 10, 1989
4872478 Swing check valve Oct. 10, 1989
4872480 Swing check valve Oct. 10, 1989
4867200 Unidirectional fluid flow check valve assembly Sep. 19, 1989
4860789 Swing check valve with hinge pin insert Aug. 29, 1989
4852607 Support for check valve disc Aug. 1, 1989
4852603 Swing check valve with secured cartridge Aug. 1, 1989
4832076 Swing check valve with hinge pin retainer May. 23, 1989
4813451 Swing check valve with removable cartridge Mar. 21, 1989

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