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Class Information
Number: 251/214
Name: Valves and valve actuation > Mechanical movement actuator > Particularly packed or sealed
Description: Devices wherein the valve stem and/or actuator is particularly associated with means to pack or seal it to prevent leakage of fluid between the inside and outside of the valve body (e.g., as where the actuating screw threads are enveloped by the packing).










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
8702056 Plug valve and stem sealing assembly Apr. 22, 2014
8702057 Bellows seal assembly and bellows valve equipped therewith Apr. 22, 2014
8662099 Valve shaft apparatus for use with rotary valves Mar. 4, 2014
8632053 Movable valve apparatus having conditioned lubricating surfaces Jan. 21, 2014
8632050 Electromagnetic actuating unit Jan. 21, 2014
8622367 Low friction live-loaded packing Jan. 7, 2014
8613423 Methods and apparatus to load a valve packing Dec. 24, 2013
8609293 High pressure tank valve sealing by using the elastic properties of O-rings Dec. 17, 2013
8556233 Field removable bonnet assemblies for use with valves Oct. 15, 2013
8511640 Ball valve with detachable slide bearing bushes Aug. 20, 2013
8511334 Compressed gas system, manual valve assembly, and manual valve piston with isochoric thermal isolation zone Aug. 20, 2013
8500091 Opening and closing valve including a packing gland and a yolk sleeve Aug. 6, 2013
8496227 High vacuum ball valve Jul. 30, 2013
8469337 Faucet sealing Jun. 25, 2013
8469336 Valve assembly Jun. 25, 2013
8453676 Fugitive emission reducing valve arrangement Jun. 4, 2013
8448919 Flow control valve and method for rebuilding a flow control valve May. 28, 2013
8439330 Stem shoulder seal with double rings and an assembly of independent dual stem seals May. 14, 2013
8402996 Adjustable choke for oil and gas industry Mar. 26, 2013
8398055 Ball segment valve Mar. 19, 2013
8398053 Double piston trunnion mounted ball valves and methods of use Mar. 19, 2013
8382067 Stem seal Feb. 26, 2013
8366071 Sliding member, mechanical seal ring, mechanical seal and faucet valve Feb. 5, 2013
8356795 Shaft retaining assemblies for use with fluid valves Jan. 22, 2013
8347831 Sealed control valve for a fluid flow circuit Jan. 8, 2013
8308131 Ball valve stem retaining system Nov. 13, 2012
8302628 Handle shaft assemblies for bottom loading couplers Nov. 6, 2012
8291885 Valve having a sleeve to prevent contamination and condensation Oct. 23, 2012
8281797 Control valve having live loaded packing follower with leak-off and independent secondary seal Oct. 9, 2012
8272621 Longitudinal bulging seal for spray gun Sep. 25, 2012
8246006 Articulating guide seal Aug. 21, 2012
8235065 Control valve having live loaded packing follower with leak-off and independent secondary seal Aug. 7, 2012
8146885 Field removable bonnet assemblies for use with valves Apr. 3, 2012
8136792 Double containment valve system Mar. 20, 2012
8132785 Shaft seal packing and shaft seal structure for valve Mar. 13, 2012
8132784 Fixing system and joint, for fixing an actuator to a valve Mar. 13, 2012
8128062 Valve with self-aligning shaft seal Mar. 6, 2012
8113485 Leak-proof structure of oil pipe connector Feb. 14, 2012
8100383 Valve assembly Jan. 24, 2012
8088339 Drainage assembly with upward opening and flat seat without retention areas for enameled chemical reactor Jan. 3, 2012
8070130 Apparatus to bias valve closure members Dec. 6, 2011
7997557 Exhaust gas recirculation valve and method of producing exhaust gas recirculation valve Aug. 16, 2011
7980531 Valve having first and second fluid ports Jul. 19, 2011
7980530 Packing nut for control valve Jul. 19, 2011
7980219 Intake controller for internal combustion engine Jul. 19, 2011
7971852 Seal structure of high-pressure tank Jul. 5, 2011
7971854 Replaceable valve shaft sealing system Jul. 5, 2011
7963502 Low friction live-loaded packing Jun. 21, 2011
7891372 Contamination and flow control Feb. 22, 2011
7883073 Methods and apparatus for adjusting a spring load in an actuator Feb. 8, 2011

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