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)
08/1981
08/25/1981CA1107602A1 Combination valve
08/25/1981CA1107601A1 Stop check float control valve
08/18/1981US4284102 Combination stop and pressure reducing valve
08/18/1981US4284097 In line back flow preventer
08/18/1981CA1107172A1 Swing check valve
08/12/1981EP0033366A2 Swing check valve with by-pass
08/11/1981US4282897 Valve assembly for pressurized fluid systems
08/11/1981US4282896 Pilot operated check valve
08/05/1981EP0033010A1 Float check valve
08/04/1981US4281680 Swing check valve construction
08/04/1981US4281679 Flow control means for use in an adaptor assembly
07/1981
07/28/1981CA1105802A1 Check valve assembly
07/21/1981US4279403 Non-reversible valve assembly
07/15/1981EP0031988A1 Valve mechanism
07/07/1981CA1104461A1 Modulating flow control valve assembly
06/1981
06/30/1981US4275759 Closure member
06/30/1981US4275756 Plastic valve core
06/23/1981US4274436 Wafer-type swing check valve construction
06/16/1981US4273155 Back-pressure valve for heating installations
06/09/1981US4271862 Check valve and method of manufacturing said check valve
06/02/1981CA1102210A1 Circular cavity discharge valve
05/1981
05/19/1981CA1101303A1 Backflow prevention apparatus
05/12/1981US4266569 Check valve
05/06/1981EP0028055A1 Ball valve
05/05/1981US4265694 Polyurethanes
05/05/1981US4265271 Relief valve
05/05/1981US4265268 Modulating flow control valve assembly
05/05/1981US4265267 Flow control device for use with positive displacement pump
05/05/1981CA1100457A1 Closing member for a ring valve
04/1981
04/28/1981US4263936 Erosion resistant check valve assembly
04/28/1981US4263682 Self-sealing valve and fluid fillable article including such a valve
04/21/1981US4262695 Flow rate control valve
04/21/1981CA1099534A1 Fluid pressure measuring and testing system and bleed regulating valve therefor
04/14/1981US4261383 Field convertible sump check valve
04/14/1981CA1099185A1 Reed valve
04/14/1981CA1099184A1 Check valve
03/1981
03/31/1981US4258925 O-ring groove
03/31/1981US4258772 Air valve tightening construction for tire tube
03/24/1981US4257458 Reed valve
03/24/1981US4257457 Discharge valve apparatus of compressor
03/24/1981US4257451 Check valve
03/24/1981US4257444 Insert check valve or the like
03/24/1981US4257443 Check valve
03/17/1981US4256137 Check valve
03/10/1981CA1097181A1 Time delay valve
03/10/1981CA1097177A1 Nonreturn piston slide valve
03/05/1981WO1981000525A1 Dispersion device for plastic or colouring material
03/03/1981USRE30532 Flapper valve with independent spring action
03/03/1981US4253805 Rotary compressor
03/03/1981US4253524 High flow check valve apparatus
02/1981
02/25/1981EP0024213A1 Swing check valve
02/24/1981US4252144 Tilting disk check valve
02/17/1981US4251226 Device for preventing backfire of inflammable gases
02/10/1981US4249568 Backflow preventer valve
02/10/1981US4249567 Check-valve construction
02/03/1981CA1094916A1 Internal check ball retainer
01/1981
01/28/1981EP0022916A1 Check valve
01/27/1981US4246933 Exhaust-indicator
01/27/1981US4246932 Multiple additive valve assembly
01/20/1981US4246002 Welding, frustoconical seat
01/20/1981CA1094130A1 Tamper proof safety cut-off fluid nozzle
01/13/1981US4244398 Check valve assembly having valve opening prior to passing flow and flow shut off prior to valve closing
01/13/1981US4244395 Check valve assembly
01/13/1981US4244392 Backflow prevention apparatus
01/13/1981US4244378 Pressure responsive one-way valve for medical systems
01/08/1981EP0016010A4 Fluid flow regulating valve and system.
01/06/1981US4243067 Ball type check valve
01/06/1981US4243064 Bypass valve for pumps, heating systems and the like
01/06/1981CA1092935A1 Wafer swing check valves
12/1980
12/30/1980US4241758 Pressure valve, especially for rotary piston compressors
12/30/1980US4241752 Backflow preventer
12/30/1980US4241751 Vacuum transmitting valve
12/23/1980US4240630 Game ball check valve
12/16/1980CA1091542A1 Backwater valve
12/16/1980CA1091540A1 Check valve
12/09/1980US4237935 Hydraulic pressure relief valve and fluid isolator
12/09/1980CA1091129A1 Swing check valve
12/09/1980CA1091128A1 Guide means for indicating check valve
12/02/1980US4236565 Valve for pneumatic tires
12/02/1980CA1090687A1 Valve stem
11/1980
11/25/1980CA1090242A1 Combination tire pressure monitoring switch and inflation valve
11/12/1980EP0018838A1 Valves having removable seats
11/11/1980US4232704 In line back flow preventer
11/11/1980CA1089342A1 Valve stem adapter
11/04/1980US4231395 Non-return valve
11/04/1980US4231394 Closing member for a ring valve
11/04/1980CA1088843A1 Irrigation drain valve
11/04/1980CA1088842A1 Check valve ball stop clip
10/1980
10/28/1980US4230150 Tilting disc check valve
10/28/1980US4230149 Fluid flow regulating valve and system
10/28/1980US4230148 Check-valve construction
10/28/1980US4229832 Diver's suit excess gas exhaust valve
10/28/1980CA1088400A1 Pressure relief valve
10/28/1980CA1088399A1 Adjustable check valve
10/21/1980US4228821 Gas-tight ball valve
10/21/1980US4228820 Seat guided poppet valve having flow and dampening control means
10/14/1980CA1087573A1 Valve apparatus and method of making same
10/14/1980CA1087491A1 Bypass valve for pumps, heating systems and the like
10/01/1980EP0016010A1 Fluid flow regulating valve and system
09/1980
09/30/1980US4224961 Tubular element for passing flowable media
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