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Class Information
Number: 251/327
Name: Valves and valve actuation > Reciprocating valve > Gate > Bifaced
Description: Devices wherein the valve head has two seating faces.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7448595 |
Shut-off fitting |
Nov. 11, 2008 |
| 7422653 |
Single-sided inflatable vertical slit valve |
Sep. 9, 2008 |
| 7377758 |
Fluid pump |
May. 27, 2008 |
| 7306201 |
Gate valve with tongue and groove or bridging seal to annular seat elements |
Dec. 11, 2007 |
| 7296783 |
Vacuum processing apparatus |
Nov. 20, 2007 |
| 7255329 |
Gate valve with offset valve stem |
Aug. 14, 2007 |
| 7225827 |
Insertion valve and installation method |
Jun. 5, 2007 |
| 7114702 |
Slide valve |
Oct. 3, 2006 |
| 7000899 |
Shutoff device |
Feb. 21, 2006 |
| 6978980 |
Slide valve closure for the casting of a metal melt and a refractory plate unit belonging to it |
Dec. 27, 2005 |
| 6966538 |
Gate valve |
Nov. 22, 2005 |
| 6959908 |
Gate valve flexible wedge |
Nov. 1, 2005 |
| 6959912 |
Injectable packing unit in a single knife gate body |
Nov. 1, 2005 |
| 6957659 |
Sliding disk valve for pneumatic conveyance of abrasive material |
Oct. 25, 2005 |
| 6957816 |
Loop seal for knife gate valve |
Oct. 25, 2005 |
| 6918574 |
Reduced torque gate valve with roller screw |
Jul. 19, 2005 |
| 6893002 |
Lockout valve |
May. 17, 2005 |
| 6854708 |
High-vacuum valve with retractable valve plate to eliminate abrasion |
Feb. 15, 2005 |
| 6845783 |
Sliding disk valve for pneumatic conveyance of abrasive material |
Jan. 25, 2005 |
| 6776184 |
Insertion valve and installation method |
Aug. 17, 2004 |
| 6745999 |
Gate valve for high-density slurries, and a valve body assembly, and a solids-containing wall lining means therefor |
Jun. 8, 2004 |
| 6726178 |
Gate valves |
Apr. 27, 2004 |
| 6688324 |
Valve for hydrate forming environments |
Feb. 10, 2004 |
| 6619619 |
Clamping device for a refractory-made plate of a sliding gate |
Sep. 16, 2003 |
| 6488263 |
Valve stem and method of manufacture; improved stem packing |
Dec. 3, 2002 |
| 6470907 |
Existing pipe cut-off method, existing pipe slitting method, piping structure, and valve insertion method for inserting a valve in a line without stopping passage of water or fluid |
Oct. 29, 2002 |
| 6422535 |
Knife gate valve |
Jul. 23, 2002 |
| 6401747 |
Gate valve |
Jun. 11, 2002 |
| 6375157 |
Slide valve |
Apr. 23, 2002 |
| 6367770 |
Vacuum valve for separating two vacuum chambers |
Apr. 9, 2002 |
| 6338469 |
Flexible wedge gate valve |
Jan. 15, 2002 |
| 6308726 |
Valve insertion method and cutting tool |
Oct. 30, 2001 |
| 6286307 |
Exhaust gas control device for an engine |
Sep. 11, 2001 |
| 6273053 |
Engine shutdown valves |
Aug. 14, 2001 |
| 6260490 |
Burner isolation valve for pulverized fuel systems |
Jul. 17, 2001 |
| 6250604 |
Valve stem and method of manufacturing, improved stem packing |
Jun. 26, 2001 |
| 6247679 |
Valve stem and method of manufacture; improved stem packing |
Jun. 19, 2001 |
| 6206338 |
Fail as-is hydraulic actuator |
Mar. 27, 2001 |
| 6131594 |
Gas cartridge actuated isolation valve |
Oct. 17, 2000 |
| 6125874 |
Gate valve having fail safe actuator |
Oct. 3, 2000 |
| 6116572 |
Valve |
Sep. 12, 2000 |
| 6016826 |
Automatic center cavity equalizing valve |
Jan. 25, 2000 |
| 6010115 |
Cavityless gate valve |
Jan. 4, 2000 |
| 5979874 |
Split knife gate valve having a uniformly compressed and constrained resilient gate seat and method for producing the same |
Nov. 9, 1999 |
| 5967168 |
Method of connecting branch pipe |
Oct. 19, 1999 |
| 5899438 |
Gate valve having a swingable-slidable valve plate |
May. 4, 1999 |
| 5890700 |
Gate valve |
Apr. 6, 1999 |
| 5875813 |
Automatic back water valve system |
Mar. 2, 1999 |
| 5836569 |
Guided gate valve |
Nov. 17, 1998 |
| 5803431 |
Shearing gate valve |
Sep. 8, 1998 |
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