Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Industrial
Class Information
Number: 251/173
Name: Valves and valve actuation > With means to increase head and seat contact pressure > Seat pressed to valve > Fluid pressure > Butterfly valve
Description: Devices in which the valve is of the butterfly type.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8607815 Butterfly valves with undulating sealing surface Dec. 17, 2013
8607812 High temperature butterfly valves Dec. 17, 2013
8256450 Butterfly valves with undulating sealing surface Sep. 4, 2012
8256448 High temperature butterfly valves Sep. 4, 2012
8123195 Pressure control butterfly valve with opening/closing mechanism Feb. 28, 2012
7802424 Exhaust device in combustion engine, and motorcycle therewith Sep. 28, 2010
7478816 Seal stiffener Jan. 20, 2009
7007926 Flap valve having dual piston sealing rings Mar. 7, 2006
6840502 Flap valve for fuel aggregates Jan. 11, 2005
6722630 Shut-off device with a swivellable butterfly valve and an entropy-elastic annular seal held on a backup ring Apr. 20, 2004
6533241 Retaining piece of a ball valve Mar. 18, 2003
6412755 Door for changing over air passage Jul. 2, 2002
6149130 Butterfly valves Nov. 21, 2000
6123318 Throttle body module having improved blade to ledge sealing Sep. 26, 2000
6116575 Seat structure for ball valve Sep. 12, 2000
6045121 Bi-directional valve seal mechanism Apr. 4, 2000
5947445 Rotatable valve assembly Sep. 7, 1999
5865422 Bi-directional valve seal mechanism Feb. 2, 1999
5538029 Method for adjusting valve sealing engagement Jul. 23, 1996
5330156 Seal arrangement for valves Jul. 19, 1994
5295659 Shaft seal for butterfly valve Mar. 22, 1994
5294091 Stop cock for a liquid container Mar. 15, 1994
5203539 Pipeline valve apparatus Apr. 20, 1993
5160118 Pipeline valve apparatus Nov. 3, 1992
4905966 Seat structure of valves Mar. 6, 1990
4898363 Butterfly and ball valves Feb. 6, 1990
4872642 Seal mechanism for butterfly valve with press contacting seal effective in both inflow and outflow directions Oct. 10, 1989
4836499 Butterfly valves Jun. 6, 1989
4796857 Metallic seal for high performance butterfly valve Jan. 10, 1989
4712768 Quarter turn valve Dec. 15, 1987
4676481 Seal for high performance butterfly valve Jun. 30, 1987
4638976 Rotary gate valve gasket and process for its manufacture Jan. 27, 1987
4634097 Sealing device for throttle valves Jan. 6, 1987
4632360 Butterfly type valve seal Dec. 30, 1986
4582080 Bidirectional cryogenic valves Apr. 15, 1986
4540457 Butterfly valve with pressurized O-ring sale Sep. 10, 1985
4513765 Arrangement on a butterfly valve Apr. 30, 1985
4513946 Valve and valve sealing member Apr. 30, 1985
4508315 Bidirectional valve seal Apr. 2, 1985
4505290 Valve seat assembly and valve Mar. 19, 1985
4491298 Butterfly valve Jan. 1, 1985
4487216 Valve seal for fire safe or high temperature valves Dec. 11, 1984
4418889 Fire safe seat for a valve Dec. 6, 1983
4398695 Metal seal structure Aug. 16, 1983
4396199 Fluid pressure sealing member for a valve Aug. 2, 1983
4394003 Cryogenic butterfly valve with bi-directional sealing capability Jul. 19, 1983
4378104 Fluid-pressure-loaded seal for butterfly valves Mar. 29, 1983
4372530 Valve and seal Feb. 8, 1983
4344632 Fluid pressure sealing ring for a valve Aug. 17, 1982
4331319 Butterfly valve May. 25, 1982

1 2










 
 
  Recently Added Patents
Bipolar transistor with diffused layer between deep trench sidewall and collector diffused layer
Engineered enzymes with methionine-gamma-lyase enzymes and pharmacological preparations thereof
Transmission terminal, transmission system, transmission method, and recording medium storing transmission control program
Solid state lighting circuit and controls
Use of a high-oleic and high-tocol diet in combination with a non-tocol antioxidant for improving animal meat quality
Shallow trench media
Supplier capability methods, systems, and apparatuses for extended commerce
  Randomly Featured Patents
Method and apparatus for coding information by inserting codes in strongly featured image regions
Micro-welding electrode
Semiconductor devices having resistive memory elements
Hydraulic circuits for compression release engine brakes
Lighting device for fiber-optic systems
Method for blurred image judgment
Multiport semiconductor memory device
Method of forming oxidic high T.sub.c superconducting materials on substantially lattice matched monocrystalline substrates utilizing liquid phase epitaxy
Aluminum alkyls and linear 1-olefins from internal olefins
Method and system for inter-fabric routing