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)
03/1990
03/07/1990CN2054127U Micro-resistive slow-closing check valve
03/06/1990US4906174 Non-return valve for pulsating burners
03/06/1990US4905730 Override check valve
03/06/1990US4905728 Swing check valve with hinge pin retainer
02/1990
02/27/1990US4904236 Fluid flow control valve
02/22/1990DE3927177A1 Valve with non-return action - has valve plate and seating with flexible edge strip
02/21/1990EP0354972A1 Valve device
02/21/1990CN2053281U Auotmatic inflating valve
02/20/1990US4901761 Closure apparatus with pressure test device
02/20/1990US4901760 Reed valve means
02/20/1990US4901757 One way valve
02/20/1990US4901682 Reed valve for two cycle internal combustion engines
02/13/1990US4900288 One-piece valve for a closed enclosure, its production process, and means for using this process
02/07/1990CN2052467U Automatic anti-overflow valve for cistern
02/06/1990US4898581 Device for administering liquid
02/01/1990DE3901323C1 Radiator drain valve
01/1990
01/31/1990CN1006657B Valve and its improvement of automatically assembling method
01/30/1990US4896695 Check valve
01/30/1990CA1265042A1 Method and apparatus for batch carbonating
01/25/1990DE3824421A1 Implement for personal use, in particular hair-care implement
01/24/1990EP0351421A1 One-way valve
01/17/1990CN2051321U Buried inversion-proofing directional valve
01/16/1990US4893650 One way high pressure flow control fittings
01/16/1990US4893644 Non-return valve for supply cocks
01/11/1990WO1990000071A1 One way flow valve
01/10/1990EP0349816A2 Drainage valve
01/10/1990EP0349659A1 Multi-connection tubular fixing socket for cycle, motorcycle and motor vehicle tyre valves
01/10/1990CN2050916U One-way valve for lampblack exhausting device
01/02/1990US4890640 Drainage valve
01/02/1990US4890637 One way valve
12/1989
12/27/1989CN2050118U Single body air valve needle
12/26/1989US4889156 Compressor valve with flat spring
12/20/1989EP0347172A1 Pressurised check valve
12/20/1989CN2049718U Back slopped inflating joint for mini-automobile and non-automobile
12/20/1989CN2049717U Anti-freeze and anti-leaking air valve
12/19/1989US4887792 Stop-check valve
12/14/1989DE3817649A1 Non-return valve
12/13/1989CN1037951A Hydraulic pressure opening check valve specially adapted for hydraulic support system
12/12/1989US4886093 Vent valve of an air pump
12/12/1989US4886085 Vacuum check valve and method of control
12/06/1989EP0345245A2 Ring valve
12/06/1989CN2048923U Self-sealing tyre valve
11/1989
11/22/1989CN2048150U Exhaust-gas needle of ball
11/21/1989US4881615 Anti-theft device for motor vehicles
11/09/1989DE3913577A1 Auslassventil fuer einen verdichter Exhaust valve for a compressor
11/08/1989CN2047327U Film-sealed valve
11/02/1989WO1989010509A1 Backflow prevention valve
11/02/1989WO1989010508A1 Inflatable containers and valves therefor
11/01/1989CN2046960U Hoseless check valve for inflatable tyre
11/01/1989CN2046959U Rapid cut-off safety gas valve
11/01/1989CN2046958U Hydraulic-control delayed on-off non-return valve
10/1989
10/31/1989US4877160 Valve unit
10/31/1989US4877095 Stopper for cable passages or conduits
10/31/1989US4877052 Check valve
10/26/1989DE3812549A1 Back siphonage preventer
10/25/1989CN2046575U Valve inside of trolley and barrow tyre
10/25/1989CN2046574U Labour saving leak-proof valve inside for inflatable tyre
10/18/1989EP0337617A2 Pressure actuated valve particularly for biological use
10/18/1989CN1036446A Plate-type flange straight check valve
10/12/1989DE3901444A1 Controllable non-return valve
10/11/1989EP0336307A2 Double-valve and membrane arrangement of non-return valve
10/11/1989EP0147418B1 Pump-actuated sequencing system
10/11/1989CN2045801U Gas-charging stoping plastics valve
10/10/1989US4872481 Poppet valve flow seat
10/10/1989US4872480 Swing check valve
10/10/1989US4872479 Swing check valve
10/10/1989US4872478 Swing check valve
10/10/1989US4872477 Swing check valve
10/10/1989US4872476 Check valve for engine cooling system
10/10/1989US4872475 Adjustable differential flow shuttle valve
10/05/1989DE3645085C2 Check valve for high pressure fluids
10/04/1989CN2045454U Leakage-preventing air valve for rubber tyre tube
10/03/1989US4870992 Backflow prevention device
10/03/1989US4870985 Flow control valve
09/1989
09/27/1989EP0334157A2 Implantable shunt system and method of assembly
09/26/1989US4869292 Brake bleeder check valve
09/26/1989US4869289 Adjustable compressor valve which can accommodate changing operating conditions in the compressor to which it is attached
09/26/1989CA1260357A1 Diverter
09/20/1989EP0333640A1 Check valve with a trottle device
09/20/1989CN2044671U Safe energy-saving check valve
09/19/1989US4867740 Multiple-membrane flow control valve and implantable shunt system
09/19/1989US4867200 Unidirectional fluid flow check valve assembly
09/19/1989US4867199 Bi-petal l check-valve construction
09/08/1989WO1989008213A1 Valve device
09/05/1989US4862913 Check valve
09/05/1989US4862910 Check valve with disc centering device
09/05/1989US4862907 Liquid flow check valve
08/1989
08/30/1989EP0330575A1 Hydraulic circuit comprising a safety valve for a hydraulic actuator
08/30/1989EP0329827A1 Automatic chambered flap valve for controlling gas passage, particularly for feeding two-stroke internal combustion engines
08/29/1989US4861331 Implantable shunt system and method of assembly
08/29/1989US4860790 Swing check valve disc
08/29/1989US4860789 Swing check valve with hinge pin insert
08/24/1989DE3804115A1 Device for feeding fuel from a tank to the internal combustion engine of a motor vehicle
08/23/1989EP0329246A1 Air inlet device for mounting in tap or pipe
08/23/1989EP0328696A1 Valve unit
08/22/1989US4858638 Fast-acting quick release valve
08/15/1989US4856555 Check valve
08/15/1989US4856554 Vacuum check valve and method of control
08/10/1989WO1989007216A1 Reed valve
08/08/1989US4854341 Plate valve
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