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