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Class Information
Number: 251/316
Name: Valves and valve actuation > Rotary valves > Seat or interface seal > Replaceable
Description: Subject matter comprising seat or sealing elements so constructed or arranged in the casing as to be readily replaced by strictly manual operations.










Sub-classes under this class:

Class Number Class Name Patents
251/317.01 Carried by head 21
251/317 Deformable material 136


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8628058 Shut-off valve for plumbing applications Jan. 14, 2014
8448919 Flow control valve and method for rebuilding a flow control valve May. 28, 2013
8281798 Ball valve seal assembly and ball valve comprising same Oct. 9, 2012
8210500 Seat ring Jul. 3, 2012
7896312 Ball valve with removable means for retaining the axial seal Mar. 1, 2011
7887025 Ball valve housing seat and method of securing the same to a ball valve Feb. 15, 2011
7850143 Ball valve assembly Dec. 14, 2010
7472886 Fluid control valve Jan. 6, 2009
6948699 Retainer for a ball valve seat Sep. 27, 2005
6854710 Valve assembly Feb. 15, 2005
6722633 Throttle body with insert-molded member Apr. 20, 2004
6655659 One-piece sanitary seat ring Dec. 2, 2003
6554249 Plug valve having seal segments with booster springs Apr. 29, 2003
6315267 Electrically controlled servo operated engine coolant valve Nov. 13, 2001
6116575 Seat structure for ball valve Sep. 12, 2000
5941266 Angle entry rotary valve Aug. 24, 1999
5806563 Dual ball valve assembly Sep. 15, 1998
5799928 Ball valve with improved valve seat and bonnet assembly Sep. 1, 1998
5676348 Asymmetric seal segment configuration Oct. 14, 1997
5642754 Method of securing a valve seat member within a tubular housing and a ball valve assembly Jul. 1, 1997
5562116 Angle entry rotary valve Oct. 8, 1996
5531244 Hemispherical ball valve Jul. 2, 1996
5427354 Valve assembly Jun. 27, 1995
5377954 Valve with seal ring having edge-welded laminations Jan. 3, 1995
5313976 Top entry ball valve and method of assembly May. 24, 1994
5305986 Fluid control valve Apr. 26, 1994
5263685 Valve seat Nov. 23, 1993
5224829 Rotatable valve having upper and lower parts Jul. 6, 1993
5129417 Valve including a closing device and sealed connectors Jul. 14, 1992
5117858 Top entry ball valves with cam adjustable seats Jun. 2, 1992
5115833 Ground hydrant with ninety-degree water flow turn-off ball valve below frost line May. 26, 1992
5052657 Ball valve Oct. 1, 1991
4953587 Ball valves for pipelines Sep. 4, 1990
4936548 Rotary gate valve arrangement Jun. 26, 1990
4911413 Structure for fitting a valve seat support ring in a valve port Mar. 27, 1990
4881718 Ball control valve Nov. 21, 1989
4848724 Ball valve with handle locking mechanism Jul. 18, 1989
4813650 Valve seat retainer Mar. 21, 1989
4813649 Ball valve Mar. 21, 1989
4809949 Plug valve Mar. 7, 1989
4771803 Ball cock with sinter ceramic valve seat and valve ball Sep. 20, 1988
4718444 Valve seat retraction method and apparatus Jan. 12, 1988
4708158 Ball-type stop cocks having standard matching flanges Nov. 24, 1987
4684105 Ball valve Aug. 4, 1987
4667928 Shut-off valve with spherical plug May. 26, 1987
4665937 Ball valve and method for assembling same May. 19, 1987
4658847 Bimetallic C-ring seal Apr. 21, 1987
4658978 Top entry ball valve and a clamp therefor Apr. 21, 1987
4641685 Axially symmetric valve assembly Feb. 10, 1987
4606368 Ball valve for pipeline Aug. 19, 1986

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