| Patents for F15C 3 - Circuit elements having moving parts (820) |
|---|
| 04/21/1993 | EP0538236A1 Piezoelectric valve |
| 04/14/1993 | EP0536734A1 One or multi-stage fluid control unit and its operating method |
| 02/09/1993 | US5184645 Shear orifice valve |
| 11/19/1992 | EP0513018A1 Microvalve. |
| 09/23/1992 | EP0504465A1 Fluid transducer with piezo-electric actuator |
| 07/28/1992 | US5133379 Servovalve apparatus for use in fluid systems |
| 04/07/1992 | CA1298530C Silicon micromachined non-elastic flow valves |
| 12/31/1991 | US5076314 Nozzle flapper mechanism |
| 12/24/1991 | US5074629 Integrated variable focal length lens and its applications |
| 11/26/1991 | US5067512 Servovalve apparatus for use in fluid systems |
| 11/12/1991 | CA1291920C Chip tolerant flapper |
| 08/22/1991 | WO1991012434A1 Microvalve |
| 08/14/1991 | DE4003619A1 Two=stage multilayer micro-valve - has central flexible tongue in first stage for direction of fluid into two chambers with outlet and return ports, respectively |
| 08/08/1991 | WO1991011623A1 Improved servovalve apparatus for use in fluid systems |
| 08/07/1991 | EP0440194A1 Improved servovalve apparatus for use in fluid systems |
| 08/01/1991 | CA2035078A1 Improved servovalve apparatus for use in fluid systems |
| 07/09/1991 | CA1285851C Electrically controlled hydraulically driven actuator assembly |
| 05/07/1991 | US5012836 Servovalve apparatus for use in fluid systems |
| 05/07/1991 | US5012835 Nozzle flapper mechanism |
| 01/30/1991 | EP0410951A1 Four mode pneumatic relay |
| 12/04/1990 | US4974625 Four mode pneumatic relay |
| 10/30/1990 | US4966646 Method of making an integrated, microminiature electric-to-fluidic valve |
| 10/23/1990 | US4964592 Fluid distributor |
| 09/25/1990 | US4959581 Servo valve having a piezoelectric element as a control motor |
| 08/21/1990 | US4949746 Fluid control valves |
| 07/24/1990 | US4943032 Integrated, microminiature electric to fluidic valve and pressure/flow regulator |
| 07/03/1990 | US4938249 Chip tolerant flapper |
| 07/03/1990 | CA1271140A1 Integrated, microminiature electric-to-fluidic valve and pressure/flow regulator |
| 06/19/1990 | US4934401 Nozzle flapper mechanism |
| 06/07/1990 | DE3840442A1 Pneumatic or hydraulic shuttle valve |
| 01/10/1990 | EP0350177A1 Fluid control valves |
| 10/04/1989 | CN2045439U Single chamber drain oil bidirection synchronous device of oil cylinder |
| 09/12/1989 | CA1259245A1 Two-level pressure control device |
| 05/16/1989 | CA1254251A1 Three way check valve |
| 05/11/1989 | DE3737143A1 Servo valve |
| 05/03/1989 | EP0314286A1 A silicon valve assembly for controlling the flow of fluid |
| 04/25/1989 | US4824073 Integrated, microminiature electric to fluidic valve |
| 04/18/1989 | US4821997 Integrated, microminiature electric-to-fluidic valve and pressure/flow regulator |
| 09/06/1988 | US4768751 Silicon micromachined non-elastic flow valves |
| 08/23/1988 | US4765370 Directional control valve |
| 08/10/1988 | EP0155953B1 Electric signal to pneumatic signal transducer |
| 07/05/1988 | US4754690 Electrically controlled hydraulically driven actuator assembly |
| 03/30/1988 | EP0261972A2 Integrated, microminiature electric-to-fluidic valve and pressure/flow regulator and method of making same |
| 03/23/1988 | EP0260985A2 Electrically controlled hydraulically driven actuator assembly |
| 03/16/1988 | EP0260065A2 Fluid control devices |
| 03/10/1988 | DE3629667A1 Method and device for modulating pressures |
| 12/12/1987 | CN86208387U Binary digital valve for flow control |
| 12/01/1987 | CA1229767A1 Electric signal to pressure signal transducer |
| 09/12/1987 | CN86204699U Self-holding reversing arrangement |
| 09/09/1987 | EP0235451A1 Directional control valve |
| 08/11/1987 | US4686658 For transmitting signals through a fluid |
| 08/11/1987 | CA1225450A1 Pneumatic servo assembly for an electro-pneumatic converter |
| 07/14/1987 | CA1224260A2 Pneumatic servo assembly for an electro-pneumatic converter |
| 05/12/1987 | US4664137 Two-level pressure control device |
| 03/19/1987 | DE3532136A1 Electrohydraulic power amplifier |
| 03/10/1987 | CA1218914A1 Wall mountable vacuum breaker |
| 01/20/1987 | US4637587 Facility for the monitoring of physical quantities on systems |
| 12/23/1986 | US4630631 Pneumatic servo assembly for an electro-pneumatic converter |
| 12/02/1986 | CA1214706A1 Oxygen partial pressure controller for a pressure swing adsorption system |
| 10/21/1986 | CA1212885A1 Fluid flow selector valve |
| 09/09/1986 | US4610263 Pneumatic servo assembly for an electro pneumatic converter |
| 08/12/1986 | US4605262 Three way check valve |
| 07/30/1986 | CN85202841U Electro-hydraulic servo water valve |
| 07/22/1986 | CA1208102A1 Pilot operated supply and waste control valve |
| 06/11/1986 | EP0183692A1 Improvements in or relating to valves |
| 06/10/1986 | CA1205652A1 Fluid flow transducer |
| 05/20/1986 | US4589436 Oxygen partial pressure controller for a pressure swing adsorption system |
| 04/02/1986 | EP0176431A1 Two-level pressure regulation device |
| 03/25/1986 | US4577652 Nozzle and impingement plate valve |
| 03/12/1986 | EP0173867A2 Three way check valve |
| 02/11/1986 | CA1200463A1 Oxygen partial pressure controller for a pressure swing adsorption system |
| 02/04/1986 | US4567909 Oxygen partial pressure controller for a pressure swing adsorption system |
| 01/21/1986 | CA1199553A1 Nozzle and flapper with squeeze film damping |
| 01/14/1986 | US4564043 Stepping valve |
| 01/03/1986 | WO1986000030A1 Improvements in or relating to valves |
| 11/12/1985 | US4552027 Fluid-flow transducer |
| 11/06/1985 | EP0160462A2 Supply control valve with integral pressure limiter |
| 10/22/1985 | CA1195566A1 Pneumatic interface apparatus for control of process systems |
| 09/10/1985 | US4540020 Supply control valve with integral pressure limiter |
| 08/20/1985 | US4535810 Electrically controlled valves |
| 08/13/1985 | US4534376 Electric signal to pressure signal transducer |
| 06/11/1985 | US4522220 Diaphragm module for pneumatic control systems |
| 05/28/1985 | US4519413 Pressure averager |
| 05/14/1985 | US4516604 Pilot operated supply and waste control valve |
| 05/07/1985 | US4515175 For an impulse fluid flow system |
| 04/23/1985 | CA1185950A1 Dump delay valve |
| 04/09/1985 | US4509553 Fluid flow selector valve |
| 04/02/1985 | US4508137 Wall mountable vacuum breaker |
| 03/20/1985 | EP0134486A1 Pneumatic stepping switch |
| 03/14/1985 | WO1985001133A1 Electric signal to pressure signal transducer |
| 01/08/1985 | US4492245 Nozzle and flapper with squeeze film damping |
| 01/08/1985 | US4492149 Pressure relay adapted to signal the position of the movable member of a jack |
| 11/27/1984 | CA1178538A1 Turboflapper nozzle systems |
| 11/20/1984 | CA1178162A1 Low power charge system |
| 11/07/1984 | EP0124218A1 Fluid-flow transducer |
| 10/17/1984 | EP0121796A2 Oxygen partial pressure controller for a pressure swing adsorption system |
| 10/03/1984 | EP0120594A2 Electro-pneumatic transducer assemblies |
| 09/19/1984 | EP0118679A2 Oxygen partial pressure controller for a pressure swing adsorption system |
| 09/11/1984 | US4470337 Fail-fixed servovalve with positive fluid feedback |
| 09/05/1984 | EP0117549A2 Wall mountable vacuum breaker |