Patents for F15B 9 - Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member (1,862) |
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02/05/1997 | EP0589887B1 Method and arrangement for controlling a pressure fluid operated apparatus |
01/28/1997 | US5597014 High-flow direct-drive rotary servovalve |
01/08/1997 | CN1139977A Fluid actuated engines and engine mechanisms |
01/02/1997 | EP0751059A1 Method and device for assembling a power assisted steering valve |
12/27/1996 | EP0749535A1 Hydraulic drive unit |
12/18/1996 | CN2242986Y Oil-pressure cylinder action controlling device without oil-pressure pump |
12/03/1996 | US5579677 Actuator operating signal sensor |
11/13/1996 | EP0741879A1 Direct drive servovalve having motor position sensor |
11/12/1996 | US5573036 Electro-hydraulic servovalve having mechanical feedback |
10/24/1996 | WO1996033347A1 Positioning apparatus and method utilizing pwm control of a double-acting hydraulic cylinder |
10/24/1996 | CA2189847A1 Positioning apparatus and method utilizing pwm control of a double-acting hydraulic cylinder |
10/22/1996 | US5568022 Integrated compliance servovalve |
10/16/1996 | CN1133407A Controller for cylinder positioning |
10/03/1996 | WO1996030650A1 Rotation control apparatus for rotary actuators |
10/02/1996 | EP0735275A2 Snap-in locking device |
10/01/1996 | CA2170088A1 Grapple control |
09/04/1996 | EP0729874A1 Steering valve |
08/14/1996 | CN1032554C Precise and inertial hydraulic servo controlling system and method |
08/08/1996 | DE19545772A1 Position control for reciprocating cylinder drive |
08/06/1996 | US5542336 Positioning apparatus and method utilizing PWM control of a double-acting hydraulic cylinder |
07/30/1996 | US5541486 Automatic tuning of a position control circuit for a servo device |
07/24/1996 | EP0630494B1 Control system for glassware forming machine |
07/18/1996 | DE19511522C1 Switching mechanism for hydraulic actuator |
07/04/1996 | DE19549150A1 Hydraulic control system esp. for forklift truck |
06/27/1996 | DE19547482A1 Verfahren zur Regelung des Antriebs eines Stößels eines Hydraulikzylinders in einer hydraulischen Presse Method for controlling the drive of a plunger of a hydraulic cylinder in a hydraulic press |
05/23/1996 | DE4441165A1 Control of servo=valve, esp. power steering of motor vehicle |
05/15/1996 | CN1122416A Actuator operating signal sensor |
05/01/1996 | EP0709578A2 Actuator operating signal sensor |
05/01/1996 | CN1121594A Automatic tuning of a position control circuit for a servo device |
04/24/1996 | EP0708396A1 Automatic tuning of a position control circuit for a servo device |
04/23/1996 | CA1338271C Control means for a hydraulic servomotor |
04/03/1996 | CN2223790Y Device for controlling bumping wheel of rotary kiln |
03/20/1996 | CN1118893A Automatic travel speed control device for hydraulic excavators |
03/19/1996 | US5500580 Integrated compliance servovalve |
03/14/1996 | DE4431103A1 Hydraulische Betätigungseinheit Hydraulic control unit |
03/07/1996 | WO1996007029A1 Hdyraulic actuating unit |
02/22/1996 | WO1996005543A1 Hydraulic drive control system |
02/15/1996 | DE4428691A1 Regelanordnung für hydraulische Antriebe Control assembly for hydraulic drives |
02/08/1996 | WO1996003586A1 Positioning drive, in particular for a machine tool |
01/31/1996 | EP0547220B1 Multiplexed radio frequency linear position sensor system |
01/30/1996 | US5488278 Load limit system for mechanical linear actuator |
01/25/1996 | DE4426032A1 Positionierantrieb, insbesondere für eine Werkzeugmaschine Positioning drive, in particular for a machine tool |
01/17/1996 | CN2217701Y Wholly-balanced end-face flow-distribution device for hydraulic motor |
01/10/1996 | EP0691252A1 Control device for a hydraulic valve plunger |
12/22/1995 | CA2152224A1 Control device for a hydraulic spool valve |
12/21/1995 | DE4420744A1 Method of assembling servo valve |
11/30/1995 | DE4418711A1 Precision mechanical adjuster for hydraulic actuator |
10/31/1995 | US5462343 Hydraulic pressure booster having booster piston and valve mechanism associated with mechanically operated and electrically controlled pressure regulators |
10/25/1995 | CN1030150C Block type direct joint electrolyte servo system |
09/26/1995 | US5452735 Control of two stage valves |
09/14/1995 | WO1995024565A1 Hydraulic drive unit |
09/14/1995 | DE19508190A1 Hydraulic drive unit |
08/17/1995 | DE4404535A1 Servo valve for vehicle steering |
08/03/1995 | WO1995020781A1 Direct drive servovalve having motor position sensor |
07/18/1995 | CA2106589C Electronic pilot positioner |
07/05/1995 | EP0661478A1 Speed change mechanism for swash plate type hydraulic motor |
07/05/1995 | CN1104728A Precise and inertial hydraulic servo controlling system and method |
06/20/1995 | US5425794 Pneumatic position controller for I.S. machine mechanism |
05/24/1995 | DE4440986A1 Pressure amplifier in vehicle hydraulic brake system |
05/24/1995 | DE4415054C1 Control for hydraulic drive |
05/18/1995 | DE4415055C1 Hydraulic drive control |
04/11/1995 | US5404722 Torque generator with reduced backlash |
04/05/1995 | EP0529018B1 Hydraulic aggregate for hydraulic control or regulating devices |
02/07/1995 | CA2007346C Fluid-controlled servo-arrangement |
01/10/1995 | US5379678 Hydraulic drive |
01/05/1995 | DE4422185A1 Method and arrangement for compensating for the change in length of a hydraulic converter |
12/28/1994 | EP0630494A1 Control system for glassware forming machine. |
12/14/1994 | EP0628466A1 Method and device for the adjustment of the hydraulic neutral position of a servovalve |
11/30/1994 | EP0626628A1 Control system for a hydraulic drive |
11/24/1994 | WO1994027201A1 Control for a hydraulic drive |
11/23/1994 | CN1026669C Method for oil controlling of rolling mill and oil apparatus of same |
10/25/1994 | CA2037947C Controller for rivetting machine |
10/13/1994 | DE4311486A1 Verfahren zur elektrohydraulischen Ansteuerung von verstellbaren hydraulischen Bauteilen und dafür vorgesehene Steuereinrichtung Method for controlling electro-hydraulic variable displacement hydraulic components and the designated controller |
10/11/1994 | US5353684 Hydraulic control device for working cylinders with unequal piston speeds |
10/04/1994 | US5351914 Hydraulic control system for aircraft |
09/20/1994 | CA2048901C Rotary servo actuator with internal valve |
08/23/1994 | US5341311 Method and apparatus for limiting the capacity of a hydrostatic machine |
08/17/1994 | EP0580852A4 Electronic pilot positioner |
08/17/1994 | EP0527967B1 Hydraulic drive device |
08/09/1994 | US5335983 Hydraulic regulator for a brake pressure control apparatus |
07/21/1994 | DE4301357A1 Hydraulic control appts. for motor vehicle with four-wheel steering |
06/30/1994 | DE4243785A1 Compact control valve for hydraulic servo system |
06/21/1994 | US5322003 Modular hydraulic control system |
05/24/1994 | US5313871 Hydraulic control system utilizing a plurality of branch passages with differing flow rates |
05/11/1994 | DE4237852A1 Hydraulic positioning cylinder for friction clutch of motor vehicle - has motor-stepped control valve integrated into piston for selective connection of working space to pressure source or sink |
05/03/1994 | CA1329109C Multi-port self-regulating proportional pressure control valve |
04/06/1994 | EP0589887A1 Method and arrangement for controlling a pressure fluid operated apparatus. |
03/30/1994 | EP0589629A1 Control of two stage valves |
03/22/1994 | CA1328002C Power transmission |
02/24/1994 | DE4227563A1 Electrohydraulic position regulator with two-stage proportional valve - has pilot electrohydraulic stage used to drive main fluid power stage with both having displacement sensors |
02/16/1994 | EP0583106A1 Pneumatic position controller for I.S. machine mechanism |
02/02/1994 | EP0580852A1 Electronic pilot positioner |
02/02/1994 | CN2154927Y Pressure feedback hydraulic impact apparatus |
01/25/1994 | CA1326524C Power transmission |
01/18/1994 | US5279204 Fluid operated mechanical power amplifier |
01/03/1994 | WO1994001681A1 Power booster |
12/28/1993 | CA1325664C Power transmission |
11/24/1993 | CN1022865C High Resolution pulse width modulation |
11/17/1993 | CN1078542A Apparatus for controlling of hydraulic sliding valves |
11/09/1993 | CA2009030C Multiplexed hydraulic control systems |