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)
09/1980
09/23/1980US4223697 Check valve
09/17/1980EP0015671A1 Tyre valve
09/16/1980US4222408 Check valve
09/16/1980US4222407 One-way flex valve
09/16/1980US4222126 Unitized three leaflet heart valve
09/09/1980CA1085263A1 Check valve structure
08/1980
08/19/1980US4218407 Valved or progressively opening sparger with rigid upper seat
08/19/1980US4217931 Adjustable check valve
08/19/1980US4217929 Flow control composite valve
08/19/1980CA1083923A1 Submersible pump check valve
08/06/1980EP0013716A1 Check valve for a hydraulic circuit
08/05/1980US4215724 Backflow preventer for sewer system
08/05/1980US4215717 Unidirectional valve
08/05/1980CA1083010A1 Staightway valve
08/05/1980CA1083009A1 Reed valve
07/1980
07/29/1980US4214729 Connecting valve
07/29/1980US4214607 Unidirectional flow limiter
07/29/1980US4214513 One-piece roof vent device and methods of constructing and utilizing same
07/29/1980CA1082580A1 Inflation valve
07/15/1980US4212319 Anti-backflow device for sillcocks
07/15/1980US4212316 Control valve
07/15/1980CA1081582A1 Unidirectional flow control valve
07/08/1980CA1081086A1 Check valve construction
07/08/1980CA1081085A1 Backflow check valve
07/08/1980CA1081084A1 Backflow preventer and relief valve assembly
07/01/1980US4210173 Syringe pumping system with valves
06/1980
06/24/1980US4209037 Environmental check valve
06/24/1980CA1080081A1 Clapper seal for check valves
06/17/1980US4207870 Blood sampling assembly having porous vent means vein entry indicator
06/03/1980CA1078704A1 Non-return valve
05/1980
05/27/1980US4204555 Exhaust valve assembly
05/20/1980US4203466 Non-return valve
05/14/1980EP0010946A1 A water faucet
05/14/1980EP0010877A1 Valve tray
05/13/1980CA1077354A1 Reed valve assembly for exhaust system secondary air
05/06/1980US4201244 Auxiliary safety valve for a pressurized fluid system
05/06/1980US4201243 Check valves
05/06/1980US4201241 Check valve with removable seat
05/06/1980CA1076920A1 Basement sump construction
04/1980
04/29/1980US4200117 Damper mechanism for fresh air intake
04/22/1980US4199309 Circular cavity discharge valve
04/15/1980US4197875 Ball check valve
04/08/1980US4196747 Flexible drinking tube with check valve
04/08/1980US4196746 Gas compressor valve
04/08/1980US4196745 Flap valve
04/08/1980CA1075129A1 Lift check valve with dashpot
04/01/1980US4195663 Condition responsive valve construction and method of making the same and system therefor
04/01/1980US4195660 Reed valve
04/01/1980CA1074660A1 Stabilizing check valve
03/1980
03/25/1980US4194589 Valve
03/19/1980EP0008800A1 Valve assembly
03/18/1980US4193424 Lamina valve for reciprocating compressors
03/18/1980CA1073780A1 Check valve
03/18/1980CA1073776A2 Gas exhaust device
03/11/1980US4192339 Valve assembly
03/04/1980US4191211 Valve member for a non-return valve
03/04/1980US4191205 Thermoplastic check valve
03/04/1980CA1072858A1 Valve
02/1980
02/26/1980US4190075 Double valve construction
02/26/1980CA1072252A1 Inflation device having fluid lock means
02/19/1980US4189385 Method and apparatus for separating serum or plasma from the formed elements of the blood
02/19/1980US4188978 Valve mechanism
02/19/1980US4188973 Check valve
02/12/1980US4187874 Fluid diode
01/1980
01/29/1980US4185656 Dual check valve structure
01/29/1980US4185655 Submersible pump check valve
01/23/1980EP0007301A1 Valve
01/22/1980US4184818 Valve for piston compressors and pumps
01/22/1980CA1070285A1 Collapsible sleeve mixing valve
01/22/1980CA1070215A1 Reed valve
01/09/1980EP0006500A1 Valve for a vehicle tyre
01/08/1980US4182355 Reflux valve
01/01/1980US4181146 Two-way valve closing at balanced pressure condition
01/01/1980CA1069020A Spring means and valve containing same
01/01/1980CA1069019A Valve with replaceable guide members
12/1979
12/25/1979US4180097 Mud pump valve
12/25/1979US4179883 Reed valve assembly
12/25/1979CA1068581A Pump systems for liquids
12/18/1979US4178639 Two-leaflet heart valve
12/18/1979US4178638 Split leaflet check valves
12/13/1979WO1979001092A1 Fluid flow regulating valve and system
12/11/1979US4177831 Flexible time delay valve
12/04/1979US4176688 Check valve
12/04/1979US4176682 Check valve ball stop clip
12/04/1979US4176681 Oral inflation valve
12/04/1979US4176680 Check valve
12/04/1979US4176679 Check valve
11/1979
11/13/1979CA1066168A1 Easily disassembled, one-way check valve
11/13/1979CA1066164A1 Backflow prevention apparatus
11/13/1979CA1066156A1 Pressure pump for use in a flow system for infusing fluid into the human body
10/1979
10/30/1979US4172696 Low stress suction or discharge reed valve for compressor
10/30/1979US4172470 Soft seat valve
10/30/1979US4172469 Soft seat check valve
10/30/1979US4172465 Check valve
10/16/1979US4171119 Fluid flow valve stem
10/16/1979US4171007 Unidirectional flow limiter
10/09/1979CA1063875A1 Dunnage bag fill valve device with integral combination baffle, plug retainer and bladder separator
09/1979
09/25/1979US4168722 Feather valve
09/11/1979US4167204 Apparatus for inflating toy balloons
08/1979
08/28/1979US4165760 Air chuck
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