Patents
Sitemap › F16 - Engineering elements or units; General measures for producing and maintaining effective functioning of machines or installations; Thermal insulation in general › F16K - Valves; Taps; Cocks; Actuating-floats; Devices for venting or aerating › F16K 15 - Check valves
Patents for F16K 15 - Check valves (18,131)
11/1991
11/20/1991CN2089106U Convenuent air valve
11/20/1991CN2089105U Check valve
11/20/1991CN2089104U Safety ball check valve
11/20/1991CN2089103U Mini-resistance valve with curve flow path
11/19/1991US5065790 Check valve
11/19/1991CA1292210C Valve assembly
11/13/1991CN2088627U Motive vehicles inflating valve tip
11/13/1991CN2088626U Sound self-damping check valve
11/13/1991CN2088625U Homodirection double float anti-back device
11/12/1991US5063958 Burst diaphragm sequence valve
11/06/1991CN2088188U Multi-function valve
11/06/1991CN2088187U Piston-type inner tube valve for manpower vehicles
11/06/1991CN1055988A Differential uniflow valve
11/06/1991CN1055910A Fluid purifying apparatus and method of purifying fluids
11/05/1991US5062779 Outlet valve for a rolling piston rotary compressor
11/05/1991US5062590 Venting and sealing mechanism
11/05/1991US5062452 Valve member and method of making such a member
11/05/1991US5062451 Maximum flow single plug retention valve
11/05/1991US5062450 Valve body for oilfield applications
10/1991
10/30/1991EP0454614A1 A fluid purifying apparatus and method of purifying fluids
10/30/1991CN2087718U Automatic-opening and slow-closing check butterfly valve
10/29/1991US5060689 Universal check valve assembly
10/29/1991CA1291393C Unidirectional fluid valve
10/28/1991CA2036801A1 Fluid purifying apparatus and method of purifying fluids
10/22/1991US5058623 Valve assembly
10/16/1991EP0452045A1 Normally closed duckbill valve assembly
10/16/1991CN2086836U Sliding-type high/middle/low pressure noise-reducing and slowly-closed check valve
10/15/1991US5056557 Butterfly-type check valve
10/15/1991US5056548 Check valve assembly with removable seat
10/15/1991CA1290648C Swing check valve with removable cartridge
10/15/1991CA1290647C Swing check valve with hinge pin retainer
10/15/1991CA1290646C Check valve seat and cage retainer
10/08/1991US5054517 One-way restrictor
10/02/1991EP0449749A1 Detachable tyre-inflating valve insert for a bicycle, motorcycle or automobile
10/02/1991EP0449483A1 A flap valve
10/02/1991CN2085888U Needle valve for air valve of bicycle
10/02/1991CN2085887U Backpressure air valve for tyre tube
10/02/1991CN2085886U Oppositely clamped one-way valve
10/01/1991US5052594 Container filling nozzle made of elastomeric material
10/01/1991US5052435 Pump valve
10/01/1991US5052434 Valve, especially for compressors
10/01/1991CA1289863C Single plunger valve for gas burning furnace
09/1991
09/24/1991CA1289372C Refrigeration valve
09/19/1991WO1991014120A1 Tyre valve assemblies
09/17/1991US5048578 Oil drainage coupler
09/12/1991DE4006897A1 Safety valve to prevent back-flow of liq. in vertical pipe - has floating disc and second disc with hole in it
09/11/1991EP0445122A1 Combined alarm and back-flow prevention arrangement for fire suppression sprinkler system
09/11/1991EP0288521A4 Check valve testing system
09/10/1991US5046527 Butterfly-type check valve
09/10/1991US5046526 One-way check valve
09/10/1991CA1288660C Poppet valve
09/04/1991CN2084141U Valve for inflating implement
09/04/1991CN2084140U Double purpose valve for tyre
09/04/1991CN2084139U Internal and external pressure sealing valve of tyre
09/03/1991US5044396 Check valve for fluids
09/03/1991US5044395 Minimum pressure drop composite plug retention valve
08/1991
08/28/1991CN2083667U Slide type slowly closing check valve
08/28/1991CN1054116A Valve discharge mechanism of refrigerant compressor
08/27/1991CA2018643A1 Multi-purpose valve
08/27/1991CA1288024C Swing check valve
08/24/1991WO1991013279A1 Subsea barrier valve
08/24/1991CA2035896A1 Subsea barrier valve
08/22/1991WO1991012450A1 Quiet check valve for pulsating flow
08/22/1991DE4004588A1 Releasable non-return valve - has slider in piston axial bore with pressure tap and control and calibration throttles increasing with slider stroke
08/13/1991CA1287549C Anti-stall ball-check valve
08/08/1991WO1991011641A1 Parenteral check valve
08/07/1991EP0440527A1 Check Valve with valve opening device
08/07/1991CN2082346U Tyre air valve inside keeping pressure for a long time
08/07/1991CN2082345U Air valve of tyres with a new type seal structure
08/07/1991CN2082344U Magnet check valve
08/07/1991CN1053660A Diagnostic system for evaluating performance of critical valves in steam turbine system
08/06/1991US5037062 Quick acting ball valve
08/06/1991US5036843 Breathing valve
07/1991
07/30/1991US5035261 Pump and valve apparatus
07/30/1991CA1286942C Exhalation valve assembly
07/26/1991CA2034844A1 Diagnostic system for evaluating the performance of critical valves in a steam turbine system
07/24/1991CN2081464U Adjustable magnetic entering right angle one-way valve
07/24/1991CN1013297B Hydraulic pressure opening check valve specially adapted for hydraulic support system
07/23/1991WO1991010853A1 Low pressure check valve
07/23/1991US5033506 Delivery valve
07/23/1991US5033504 Automatic relief valve
07/23/1991CA2071554A1 Low pressure check valve
07/23/1991CA1286568C Check valve
07/17/1991EP0437314A1 Valved discharge mechanism in a refrigerant compressor
07/17/1991CN2081019U Ball sealing air valve
07/16/1991US5031659 Sewer line relief valve
07/16/1991CA1286337C Quick disconnect for sewage system
07/16/1991CA1286196C Check valve
07/10/1991EP0436420A1 Heart valve with leaflets pivoted on balls
07/10/1991CN2080602U Air valve for tyre of bicycle
07/10/1991CN2080601U Backwater liquid control valve for heat supply system of non-pressure boiler
07/10/1991CN2080600U Magnetic angle check valve
07/10/1991CN2080599U Differential check valve
07/10/1991CN2080598U Exhaust valve for oil soot extractor
07/09/1991US5029604 Safety core for tire valve
07/09/1991US5029599 Butterfly valve method and apparatus
07/09/1991CA1285849C Valve component for a frictionless guided valve
07/02/1991US5027784 PCV system with a check valve device
07/02/1991US5027754 Non-return valve of the flap type for flow concentration
06/1991
06/26/1991CN2079694U Single tube type leakless air valve for tyre
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