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)
08/1990
08/28/1990US4951708 Vacuum check valve
08/28/1990US4951707 Seal for a pump valve
08/28/1990US4951706 Flapper check valve
08/22/1990EP0382739A1 One-way valve, method for the production thereof and the use of the valve
08/22/1990CN2060840U Check valve with elastic convex plug
08/21/1990CA1272936A1 Check valve
08/15/1990CN1009218B Check valve
08/14/1990US4948349 Pump and valve apparatus
08/14/1990US4948092 Combined check valve and fluid pressure relief valve
08/07/1990US4945947 Ball-type check valve
08/07/1990US4945945 Check valve assembly for corrosive fluids
08/07/1990US4945941 Means to reduce vibration in check valves and stop/check valves caused by pulsating low fluid flow
08/01/1990EP0380251A1 Nozzle
07/1990
07/31/1990US4944327 Riser check valve
07/25/1990CN2059701U Labor-saving self-dustproof valve inside
07/24/1990US4942898 Automatic culvert directional flow control device
07/18/1990EP0302068B1 Check valve
07/11/1990EP0377536A1 Check valve for introducing a liquid to be sprayed to a pump chamber, and its use
07/10/1990CA1271426A1 Reed valve assembly
07/04/1990EP0376935A2 Irrigation appliance
07/04/1990EP0376366A1 Breathing valve
07/04/1990EP0375754A1 Backflow prevention valve
07/04/1990EP0375681A1 Multiple fluid path junction device.
07/03/1990CA1271105A1 Valve for relieving pressure or checking reverse flow
06/1990
06/27/1990EP0374644A1 Quick-acting valve system
06/27/1990EP0233880B1 A check valve
06/26/1990US4936339 Cartridge-type check valve
06/26/1990US4936032 Safety valve for hydraulic receiver and hydraulic circuit comprising same
06/20/1990EP0373833A2 One way valve
06/20/1990EP0373818A2 Air nozzle for inflatable articles
06/20/1990CN2058442U Ball type valve inside
06/19/1990US4934362 Unidirectional fluid valve
06/12/1990US4932436 Ball valve
06/07/1990CA2004756A1 Air nozzle for inflatable articles
06/06/1990EP0371174A1 Anti-theft device for motor vehicles
06/06/1990CN2057984U 定时阀 Valve timing
06/06/1990CN1042768A Sealed type inflation valve
06/06/1990CN1042767A Position detector for clapper of non-return valve
06/05/1990US4930539 Anti-fluttering check valve
05/1990
05/31/1990DE3840182A1 Non-return valve
05/29/1990US4928726 Crossarm valve seat with pulling ledge
05/29/1990US4928725 Combination plug and two-way check valve
05/23/1990EP0369125A1 A check valve
05/22/1990US4926908 Pressure relief and vacuum vent valve
05/22/1990US4926704 Valve test plug
05/22/1990CA1269411A1 Vacuum check valve
05/17/1990DE3838547A1 Non-return valve
05/16/1990CN2057254U Long acting seal ring of valve inside
05/15/1990US4924923 Fuel filler pipe seal
05/15/1990US4924906 Ring valve
05/15/1990US4924899 Gas mouth
05/15/1990US4924796 Marine fender
05/09/1990EP0367655A1 Operating device for the evacuation of a pressurised fluid container in a recipient
05/08/1990US4922955 Fluid flow control device
05/08/1990US4922947 Automatic membrane drain device for pneumatic circuits
05/08/1990CA1268686A1 Valve for respirator
05/02/1990CN2056720U Convenient inflating nozzle
05/02/1990CN2056719U Non-return valve for float groove
05/01/1990US4921017 Check valve
04/1990
04/27/1990CA2001363A1 Device for controlling means for discharging a fluid under pressure contained in a container
04/24/1990US4919167 Check valve
04/24/1990US4919166 Two-way flow valve
04/24/1990US4919163 Device and method for flushing fluid lines
04/24/1990US4918768 Air valve for spas and baths
04/18/1990EP0363930A2 Douche container with nozzle
04/18/1990EP0363753A2 Process for manufacturing of a flexible closing member, especially a heart valve
04/11/1990CN2055889U Long-effect air nozzle assembly
04/11/1990CA2000459A1 Douche container with nozzle
04/10/1990US4915129 Check valve
04/10/1990US4915128 Automatic chambered flap valve for controlling gas passage, particularly for feeding two-stroke internal combustion engines
04/05/1990WO1990003201A1 Combined alarm and back-flow prevention arrangement for fire suppression sprinkler system
04/05/1990DE3932468A1 Fluessigkeitsstrom-regelventil Fluessigkeitsstrom-regulating valve
04/05/1990DE3922197A1 Self sealing valve, especially non-return valve - consists of piston in tubular housing with compression spring
04/04/1990EP0362073A2 Automatic no-return valve
04/04/1990EP0361731A2 Check valves and clips thereof
04/04/1990CN2055556U Hydraulic-control check valve
04/04/1990CN2055555U Flow-restricted valve with waterless normal-closure and water-cut off self-closure functions
04/04/1990CN2055493U Self-close type quick connecter for water-supply of train
04/04/1990CN1041027A Delivery valve
04/03/1990US4913187 Compressor valve with flat spring
04/03/1990US4913182 Plumbing fixture check stop
03/1990
03/28/1990EP0360327A1 Antireturn system for a continuously flowing fluid
03/28/1990CN2055209U Float-controlled exhaust value
03/27/1990US4911405 Valve unit
03/27/1990US4911403 For use with high pressure gas cylinders
03/27/1990US4911196 Inline check valve
03/22/1990WO1990002898A1 Device for connecting at least two supply pipes with a common drainage pipe
03/22/1990WO1990002875A1 Delivery valve
03/22/1990WO1990002662A1 Tire inflation valve having overpressure and flow control
03/21/1990EP0358899A2 Check valve with a throttle device
03/21/1990CN2054857U Air valve of tyre
03/20/1990CA1266814A1 Valve
03/14/1990CN2054510U Anti-stealing tyre valve cap for bicycle
03/14/1990CN2054509U Sliding slow-stop check valve
03/13/1990US4908028 Valve incorporating at least one rocking flap with respect to elastic pivots
03/13/1990US4907616 Check valve assembly
03/08/1990DE3829856A1 Non-return valve
03/07/1990EP0357420A1 Non-return valve
03/07/1990CN2054129U Noiseless check valve
03/07/1990CN2054128U One-way valve core of electromagnetic pump
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