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)
08/1989
08/01/1989US4852605 Valve operating without friction
08/01/1989US4852602 Use in an irrigation system
07/1989
07/26/1989CN2041755U 单向阀 Check valve
07/25/1989US4850796 Centrifugal pump with splitter vane/shut-off valve system
07/25/1989US4850393 All-plastic check valve
07/19/1989EP0324519A2 Inflatable body with a valve and a packaging with such a body
07/19/1989CN2041383U Valve inside for motorless vehicles' wheel
07/18/1989US4849041 Method of forming a plunger for a check valve
07/18/1989US4848394 Gas cartridge
07/13/1989DE3744636A1 Valve-closing body
07/12/1989EP0323804A2 One way valve for a pressurized fluid
07/12/1989EP0243454B1 Backflow preventer apparatus for fluid flow lines
07/11/1989US4846810 Valve assembly
07/11/1989US4846221 Ball valve with built-in check valve
07/11/1989US4846218 Check valve for liquid chromatography pumps
07/05/1989CN2040570U Check valve for inflating tyres
06/1989
06/27/1989US4842015 Check valve
06/27/1989US4842014 Check valve hanger mechanism
06/27/1989CA1256305A1 Methods of pumping and loading emulsion slurry blasting compositions
06/22/1989DE3741548A1 Non-return valve for pipes
06/22/1989DE3741547A1 Non-return valve for pipes
06/21/1989EP0320938A2 A valve
06/20/1989CA1256084A1 Ball valve
06/14/1989CN1004468B Valve for respirator
06/13/1989US4838742 Method and apparatus for making an undercut drilled hole in a fixed base
06/13/1989US4838262 Exhalation valve
06/06/1989US4836245 Control valve
06/06/1989US4836235 Valve
06/01/1989WO1989004934A1 Ball check valve
05/1989
05/31/1989CN2038582U One-way valve with flow monitoring function
05/31/1989CN2038581U Recoil health purifier
05/30/1989US4834140 Brake bleeder valve
05/24/1989CN2038174U Check valve for tyre inflated
05/24/1989CN2038173U Plunger valve type air nozzle of bicycle tyre
05/23/1989US4832076 Swing check valve with hinge pin retainer
05/23/1989US4832075 One-way check valve for pressurized fluid
05/23/1989CA1254485A1 Faucet valve with check stop
05/18/1989WO1989004205A1 Exhaust air disposal installation for adhesive installations
05/18/1989DE3738089A1 Integrated-diaphragm non-return valve
05/17/1989EP0315797A1 No-return valve
05/11/1989DE3814945A1 Abluftentsorgungsanlage fuer klebstoffanlagen Extract air removal system for adhesive systems
05/10/1989CN2037418U Multipurpose gas charging mouth for motorcycle
05/10/1989CN2037417U Seal inner tyre air valve for manpower vehicle
05/09/1989US4827975 Valve
05/09/1989US4827973 One way flow valve
05/03/1989CN2037018U Air valve
05/03/1989CN2037017U Axial damping type non-return valve
05/02/1989US4826134 Intake valve for air compressors and the like
05/02/1989US4825902 Flapper valve with protective hinge pin sleeve
05/02/1989CA1253546A1 Molded case circuit breaker with an improved arc gas external venting system
04/1989
04/27/1989EP0203090A4 Diverter.
04/26/1989CN1004023B Faucet valve with check stop
04/25/1989US4823831 Nozzle for inflatable objects
04/19/1989CN2036233U Lever-type gravity-balanced check valve
04/13/1989DE3732323A1 Safety valve for the protection of air pumps against the backflow of water, other liquids and air backpressure
04/11/1989US4820409 Plastic pressure relief valve assembly
04/11/1989US4819689 Head-guided poppet valve member and valve assembly
04/11/1989US4819685 Tubeless tire valve
04/06/1989WO1989002764A1 Nonreturn valve arrrangement
04/06/1989DE3732565A1 Nonreturn valve
04/05/1989CN2035419U Integral installation ball backflow-proof valve
04/05/1989CN2035418U Back-flow proof valve with preventing water-hammer and noise
03/1989
03/29/1989EP0309240A2 Pump and valve apparatus
03/29/1989EP0309137A1 Cartridge bypass valve
03/29/1989EP0308618A2 Check valve, specially for compressed air
03/29/1989EP0308589A2 Check valve for a gas conduit
03/29/1989CN2035032U Auxiliary inflation inlet for automotive-vehicle tyre
03/29/1989CN2035031U Valve and valve group for instrument and meter
03/28/1989US4815705 Valve body
03/28/1989US4815576 Twin-tube type shock absorber with a base valve portion structure coupled by caulking
03/28/1989US4815493 Cartridge bypass valve
03/23/1989WO1989002291A1 One-way valve
03/22/1989CN2034642U 底阀 Bottom valve
03/21/1989US4813817 Plug valve
03/21/1989US4813655 Control valve for gas spring
03/21/1989US4813452 Kinetic check valve
03/21/1989US4813451 Swing check valve with removable cartridge
03/15/1989CN1031755A Low-resistance one-way water-purifying gate equipment
03/14/1989US4811758 Pressurized check valve
03/09/1989WO1989002048A1 A valve
03/07/1989US4809741 Check valve
03/07/1989US4809739 Check valve
03/07/1989US4809738 Swing check valve
03/02/1989DE3728122A1 Double-acting protective seal
03/02/1989DE3727831A1 Automatic valve, particularly an inlet or outlet valve for metering pumps
02/1989
02/28/1989US4807780 Vending machine for beverage
02/28/1989CA1250555A1 Reed valve for refrigeration compressor
02/22/1989EP0303828A2 Compressor valve with flat spring
02/22/1989CN2033078U Air tap for balls
02/22/1989CN2033077U Hydraulic-control slow-opening slow-stopping check valve
02/21/1989US4805661 Faucet valve with anti-siphon back flow preventer
02/15/1989CN2032673U Pressure reduction non-return angle valve
02/15/1989CN2032672U Valve inside of bicycle tyre
02/15/1989CN2032671U Electro-controlled hydraulic one-way valve
02/09/1989WO1989001104A1 One-way valve, method for the production thereof and the use of the valve
02/07/1989US4802651 Ball plug valve
02/01/1989EP0301937A1 Automatic draining apparatus with a diaphragm for pneumatic circuits
01/1989
01/31/1989US4800919 Flap gate assembly
01/31/1989CA1249673A1 Check-valve assembly, namely for pressurized water reactor
01/26/1989DE3723673A1 Externally controlled non-return valve
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