Patents
Sitemap › F15 - Fluid-pressure actuators; Hydraulics or pneumatics in general › F15B - Systems acting by means of fluids in general; Fluid-pressure actuators, e.g. servomotors; Details of fluid-pressure systems, not otherwise provided 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
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)
09/1999
09/14/1999US5950668 Control valve positioners having improved operating characteristics
09/07/1999US5947140 A hydraulic circuit
09/07/1999US5947000 Servo operation apparatus for a transmission
08/1999
08/17/1999US5938098 For controlling the position of an edge of a web of material
08/11/1999EP0741879B1 Direct drive servovalve having motor position sensor
08/03/1999US5931180 Electropneumatic positioner
07/1999
07/27/1999US5928041 Rotary valve actuated hydraulic steering system
07/20/1999US5924516 Electronic controls on a skid steer loader
07/15/1999DE19757157A1 Hydraulic linear drive for use with nibbling machine etc.
07/13/1999US5922032 Controller and method of controlling a hydraulic control network with latching valve
06/1999
06/30/1999EP0925457A1 Compact actuator and controller and pumping apparatus for same
06/24/1999WO1999031394A1 Controller and method of controlling a hydraulic control network with latching valve
06/16/1999CN1219663A Electropneumatic positioner
06/09/1999EP0921455A2 Electropneumatic positioner
06/02/1999EP0918939A1 Electropneumatic positioner
05/1999
05/26/1999EP0917675A1 Position regulator for drive systems and pneumatic control valve having a position regulator of this type
05/26/1999CN2321035Y AC machine servomechanism for speed controller of water turbine
05/18/1999CA2221403A1 Aircart variable rate drive
05/04/1999US5899064 Servo-actuator with fail safe means
03/1999
03/23/1999US5884894 Inner-loop valve spool positioning control apparatus
03/10/1999CN1210208A Hydraulic servo device
03/03/1999EP0899464A2 Hydraulic servomotor control assembly
03/02/1999US5875701 Method and apparatus for controlling an implement of a work machine using linkage angles
03/01/1999CA2246210A1 Hydraulic servomotor control assembly
02/1999
02/24/1999CN2308758Y Hydraulic cylinder with rotary function
02/17/1999CN2307953Y Electric controlled hydraulic actuating mechanism
02/03/1999EP0894982A2 Hydraulic servo device
01/1999
01/27/1999EP0892891A1 Positioning actuator device for controlling a servomotor
01/13/1999CN2303962Y Jamming-proof valve for hydraulic impact revolving mechanism
01/12/1999US5857400 Servo operation apparatus for a transmission
01/12/1999US5857333 Control system for hydraulic power units
01/07/1999DE19728850A1 Method for operating hydraulic or pneumatic position control system
01/05/1999US5855226 Valve actuator
12/1998
12/23/1998CN2301567Y Acceleration valve
12/16/1998EP0884667A1 Automatic pneumatic pressure control apparatus and method of controlling same
12/16/1998EP0884481A2 Pneumatic position controller
11/1998
11/26/1998DE19814147A1 Speed controller of mast tilting cylinder of fork lift truck
11/25/1998EP0879361A1 Power steering system with a variable bias between valve elements
11/24/1998US5839346 Rotary hydraulic actuator including groove-like fluid supply paths in a face of a bracket
11/04/1998EP0875811A2 Automatic pneumatic pressure control apparatus and method of controlling same
11/03/1998US5829336 Hydraulic drive unit
10/1998
10/29/1998DE19818480A1 System for controlling of hydraulic circuit
10/14/1998CN1195744A Cylinder locating controller
10/08/1998DE19714226A1 Clutch withdrawal system used on utility vehicle
10/07/1998EP0775337B1 Hydraulic drive control system
09/1998
09/01/1998US5799380 Device for assembling a servo valve
08/1998
08/25/1998US5797309 Steering valve
08/25/1998CA2104368C Mechanical power amplifier
08/19/1998EP0772746B1 Positioning drive, in particular for a machine tool
08/18/1998US5794509 Proportional pneumatic fin actuator system without feedback control
08/18/1998US5794505 Positioning drive, in particular for a machine tool
08/11/1998US5791228 Torque or force amplifying actuator and method for controlling actuator
07/1998
07/22/1998EP0853731A2 Electrohydraulic control valve arrangement
06/1998
06/23/1998CA2161078C Automatic tuning of a position control circuit for a servo device
06/03/1998EP0749535B1 Hydraulic drive unit
04/1998
04/28/1998US5743165 Method for controlling driving of a ram of a hydraulic cylinder of a hydraulic press equipment
04/16/1998WO1998015741A1 Control valve positioners having improved operating characteristics
04/14/1998US5737995 For use in a vehicle
04/14/1998US5737993 Method and apparatus for controlling an implement of a work machine
04/08/1998CN2278107Y Electric controlled hydraulic actuator
03/1998
03/19/1998WO1998011357A1 Compact actuator and controller and pumping apparatus for same
03/19/1998CA2269585A1 Compact actuator and controller and pumping apparatus for same
03/18/1998EP0828946A1 Hdyraulic actuating unit
03/04/1998EP0827056A2 Inner loop valve spool positioning control apparatus and method
03/03/1998US5724223 Control of a proportional valve using mains voltage
02/1998
02/26/1998WO1998007993A1 Electropneumatic positioner
02/26/1998CA2263841A1 Electropneumatic positioner
02/12/1998WO1998006017A1 Position regulator for drive systems and pneumatic control valve having a position regulator of this type
02/11/1998CN1172912A Variable priority device
01/1998
01/28/1998CN1171506A Servo operation apparatus for transmission
01/22/1998DE19729387A1 Prioritätsvariable Vorrichtung für ein Hydrauliksystem von Baugerät Variable priority device for a hydraulic system of construction equipment
01/15/1998DE19627668A1 Drive device esp. as steering assist for motor vehicle
01/08/1998DE19727358A1 Frequency modulated valve control apparatus
01/02/1998DE19726822A1 Movement control device for excavator tool
12/1997
12/30/1997US5701793 Method and apparatus for controlling an implement of a work machine
12/23/1997US5699714 For controlling a hydraulically operated apparatus
12/17/1997CN1036730C Apparatus for controlling of hydraulic sliding valves
12/04/1997DE19635368C1 Electro-pneumatic position regulator e.g. for control valve
11/1997
11/25/1997US5691894 Cylinder positioning control apparatus
11/18/1997US5687631 Speed change mechanism for swash plate type hydraulic motor
09/1997
09/04/1997WO1997032134A1 Power steering system with a variable bias between valve elements
09/04/1997CA2247260A1 Power steering system with a variable bias between valve elements
08/1997
08/05/1997US5654885 Valve position controller
07/1997
07/23/1997EP0785311A2 Electronic controls on a skid steer loader
07/17/1997WO1997025534A1 Electro-hydraulic servovalve having mechanical feedback
07/17/1997CA2194714A1 Electronic controls on a skid steer loader
07/03/1997WO1997023734A1 Positioning actuator device for controlling a servomotor
07/02/1997EP0781381A1 Positioning apparatus and method utilizing pwm control of a double-acting hydraulic cylinder
06/1997
06/17/1997US5638864 To control the flow of fluid from a source of pressurized fluid
05/1997
05/28/1997EP0775623A1 Steering control unit with flow amplification for unequal piston areas
05/28/1997EP0775337A1 Hydraulic drive control system
05/28/1997CN1150835A Positioning apparatus and method utilizing pwm control of double-acting hydraulic cylinder
05/14/1997EP0772746A1 Positioning drive, in particular for a machine tool
05/01/1997WO1997013074A3 Electrohydraulic control valve arrangement
04/1997
04/10/1997WO1997013074A2 Electrohydraulic control valve arrangement
04/09/1997EP0767310A2 Hydraulic actuator
04/08/1997US5617724 Hydraulic control system for use in a forklift truck
04/03/1997DE19536553A1 Elektrohydraulische Steuerventilanordnung Electro-hydraulic control valve assembly
03/1997
03/18/1997US5611518 Control device for a hydraulic slide valve
02/1997
02/05/1997EP0751059B1 Method and device for assembling a power assisted steering valve
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