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)
06/1991
06/25/1991US5025829 Parenteral check valve
06/20/1991DE4039644A1 Central heating overflow valve - has flat annular sealing face on valve plate with peripheral radiused edge
06/19/1991CN2079246U Bicycle tyre inflating needle
06/19/1991CN2079245U Piston type valve tap
06/19/1991CN2079244U Slow closing device set for micro-resistance slow closing check valve
06/19/1991CN2079243U Magnetic check valve
06/12/1991EP0431815A2 Venting and sealing mechanism
06/12/1991CN2078835U Centre-fixed valve
06/06/1991DE3940099A1 Lamellar valve structure - comprising two housing sections with intermediate flexible elastic seal fixed between them comprising plastic sheet
06/05/1991CN2078403U Gastight nut
06/05/1991CN2078402U Check valve for central smoke venting and discharging system in residential building
06/04/1991US5020567 Drainage valve having a flexible flap with an edge taper
06/04/1991CA1284608C Poppet valve flow seat
05/1991
05/29/1991EP0203090B1 Diverter
05/29/1991CN2077942U Non-return devices for poured natural gas
05/22/1991EP0428051A2 Check valve with reduced hold-open pressure
05/21/1991US5017284 Fluid purifying apparatus and method of purifying fluids
05/21/1991US5016669 Valve assembly
05/16/1991DE3937458A1 Flow control valve with stop plug - which is fixed in flow duct, with cap widening in flow direction with edge spaced from shoulder in duct downstream
05/15/1991EP0187769B1 In-line check valve having combined downstream poppet support and flow control elements
05/15/1991CN1051417A Sealed air valve
05/14/1991US5014739 Check valve assembly
05/08/1991EP0426519A1 Blocking device for a vertical conduit supporting and guiding an elongate-shaped element
05/08/1991EP0426223A1 Non-return valve of the flap type for flow concentration
05/08/1991CN2076630U One-way valve preventing user from fraudulent use of water by micro-flow
05/08/1991CN2076629U Rotary non-return valve structure without leaking
05/07/1991CA1283835C Valve assembly for pipeline
05/02/1991DE4033818A1 Plastics resin relief valve for gas compressor - incorporates hollow circular contg. attached to bolt
05/01/1991CN1051074A Multi-fork valve
04/1991
04/30/1991US5010925 Normally closed duckbill valve assembly
04/30/1991US5010919 Subsea barrier valve
04/30/1991US5010918 Reed valve having variable length petal
04/30/1991US5010916 Check valve
04/30/1991US5010913 Fluid bleed apparatus
04/24/1991CN2075734U Multifunctional one-way air valve for inflation
04/23/1991US5009393 Linear flow turn down valve
04/18/1991WO1991005193A1 Riser check valve
04/18/1991WO1991005192A1 Gas inlet valve assembly for inflatable boats
04/17/1991EP0423020A1 Check valve
04/17/1991CN2075290U Suspended check valve
04/16/1991US5007614 Pressure responsive two-way shut-off valve
04/16/1991US5007454 Fluid control valve with tubular poppet
04/16/1991US5007449 Deflator
04/16/1991US5007448 Filling device for liquid filled tires
04/11/1991DE3933153A1 Membrane valve with disc-shaped membrane - has valve housing with inlet and outlet part, and support, and perforated plate
04/10/1991CN2074849U Opposite clamping type check valve
04/03/1991EP0420353A2 Valve, an inflatable body with such a valve, and a packaging
04/02/1991US5004005 Combination valve
03/1991
03/27/1991EP0418580A1 Dual check valve
03/26/1991US5002662 Check valve
03/26/1991US5002230 Valve for an atomizing nozzle and the like
03/20/1991CN2073517U Valves of tyres
03/19/1991US5000223 Swing check valve with secured cage
03/19/1991US5000213 Butterfly valve method and apparatus
03/19/1991US5000212 Butterfly valve method and apparatus employing variably positionable pivot shaft
03/19/1991CA1281820C Air mattress with filler check valve and cap therefor
03/13/1991CN2073062U Valve needle for bicycle
03/13/1991CN2073061U Water compensation variable speed slowly closing check valve
03/12/1991CA1281258C Poppet valve
03/12/1991CA1281257C Check valve
03/12/1991CA1281256C Adjustable differential flow shuttle valve
03/07/1991DE4026490A1 Coiled valve spring with axial coils - has at least three corners with angle twice at least thickness of spring material
03/06/1991CN2072625U Plug type automatic pressure regulating check valve
02/1991
02/27/1991EP0414329A1 Filling nozzle
02/27/1991CN2072178U Non-return valve
02/27/1991CN2072177U Dual-purpose valve with retaining valve disc
02/21/1991WO1991002183A1 Combination valve
02/21/1991DE4025488A1 Non-return valve with movable valve part - has spherical surface with valve seating, with holes, and spiral spring, housing and thrust piece
02/21/1991DE3926915A1 Non-return valve with seating in housing - has ball-shaped closure piece with spring and support, with collar end section
02/20/1991CN2071735U Butterfly non-return valve
02/19/1991US4993452 Low pressure check valve
02/19/1991CA1280336C Control valve
02/13/1991CN2071281U Inflating valve
02/13/1991CN2071277U Multifunctional safety valve for running water
02/12/1991US4991655 Combined alarm and back-flow prevention arrangement for fire suppression sprinkler system
02/12/1991US4991622 Multiply configurable backflow preventer
02/12/1991US4991617 Gas inlet valve assembly for inflatable boats
02/12/1991US4991547 Intake port pressure control system for engine induction system
02/12/1991CA1280050C Check valve hanger mechanism
02/07/1991WO1991001464A1 Anti-return valve, particularly for micropump and micropump provided with such a valve
02/07/1991WO1991001159A1 Molded nosecup valve assembly
02/06/1991EP0411930A2 Air spa or whirlpool bath system and non-return valve for use therein
02/06/1991CN2070855U Signal valve
02/06/1991CN2070851U Multifunctional air valve
02/06/1991CN2070850U Double purpose well sealing tyre valve inside
02/05/1991US4989639 Brake bleeder check valve
02/05/1991US4989635 Check valve with reduced hold-open pressure
02/05/1991US4989631 Valve device with control sleeve and check valve
02/05/1991US4989590 Irrigation appliance
01/1991
01/30/1991CN2070387U Long service life sealing ring for valve inside
01/30/1991CN2070386U Semi-antomatic fuel feeder for lighter
01/29/1991CA1279552C Control stop for flushing system
01/29/1991CA1279550C Backflow preventing device
01/23/1991CN2069957U Check-valve-type valve inside
01/23/1991CN2069956U Check valve without choke water hammer
01/23/1991CN2069955U Small check valve
01/23/1991CN1048746A Multifunctional device for automatic bidirectional air-injection with stable pressure
01/22/1991US4986310 Low pressure check valve
01/22/1991CA1279230C Ball check valve
01/16/1991EP0408177A1 Check valve cartridges with controlled pressure sealing
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