Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 151 - 200 out of 3,875

Document Document Title
WO2001018763A3  
WO2000016464A9
A control system for controlling position of an object includes an integrated actuation package utilizing an electric motor driven servopump (3) to control actuator (4) position. The electric motor (2) operates at a constant direction an...  
WO/2001/031205A1
A precision servo control system for a pneumatic actuator has a piston (5) positionable over a stroke of the pneumatic actuator (2) using a supply of pressurized gas. A brake (52) and a sensor system (44) are connected to the actuator (2...  
WO/2001/027478A1
A servo control for a cam phaser (10) includes a pulse width modulated controller (20) that operates a four way solenoid valve (18). The cam phaser piston (12) or vane(s) are positioned with a computer program stored in the controller (2...  
WO/2001/018763A2
The invention relates to a method and a device for the transmission of control and/or sensor signals between an electronic control and/or data receiving device (21) and a pneumatic device (10), which are connected to one another by a pne...  
WO2000016464A3
A control system for controlling position of an object includes an integrated actuation package utilizing an electric motor driven servopump (3) to control actuator (4) position. The electric motor (2) operates at a constant direction an...  
WO/2000/029825A1
A loading assembly (2, 88) for applying a load to a test specimen (1, 105) includes a container (4, 6, 97, 98) having a volume of compressible fluid (3) for providing a spring. A cylinder (6, 97) having a bore (5, 94) operably connected ...  
WO/2000/016464A2
A control system for controlling position of an object includes an integrated actuation package utilizing an electric motor driven servopump (3) to control actuator (4) position. The electric motor (2) operates at a constant direction an...  
WO/2000/009279A1
The invention relates to a device for hydraulically adjusting components, especially the rollers of strand guiding segments of a continuous casting installation with hydraulic cylinders (2) which are subdivided into a cylinder chamber (9...  
WO/1999/031394A1
A control method for managing a hydraulic control system (10, 100) of a vehicle is disclosed. The method includes the steps of scheduling the invocation of a plurality of vehicle functions through system operations, which functions are u...  
WO/1998/015741A1
A control assembly includes a positioner/actuator and a control valve. The positioner/actuator includes a valve actuator and a positioner for controlling actuator position and speed in response to a control signal. The control valve has ...  
WO/1998/011357A1
A compact actuator (21) for use with a fluid and including a housing (31) having a predetermined geometry. An actuation member (41) is mounted in the housing for movement between first and second positions for performing work. The actuat...  
WO/1998/007993A1
The invention relates to an electropneumatic positioner with a pneumatically controlled two-chamber actuating drive(1) with a pneumatic air inlet and air outlet valve (10,17) on a pressure pipe (15) of the actuating drive and an addition...  
WO/1998/006017A1
With the position regulator according to the invention a first adjusting step and a second adjusting step are generated in order to prevent sustained oscillations about a constant desired value. The size of the first and second adjusting...  
WO/1997/032134A1
A power steering control valve (22) includes inner and outer valve members (40, 42) rotatable relative to each other. A force transmitting assembly (114) transmits a force which resists relative rotation between the valve members. A pres...  
WO/1997/025534A1
The invention is a multi-stage electro-hydraulic servovalve having a mechanical feedback between the valve's main stage (2) and pilot stage (4). The feedback mechanism makes use of an interconnected set of linkages (74, 82, 88, 96, 98, 1...  
WO/1997/023734A1
A positioning device for controlling a servomotor (2), comprising a two-way valve with a fluid inlet, an outlet and two opposite outputs for powering the movement of the servomotor (2), the slide being coupled via a control mechanism to ...  
WO1997013074A3  
WO/1997/013074A2
The invention concerns an electrohydraulic control valve arrangement (10) for controlling the movement of a hydraulic motor. The control valve arrangement (10) comprises a main control valve (11), which can be actuated by the alternating...  
WO/1996/033347A1
A double-acting hydraulic cylinder is controlled by a pair of three-way solenoid valves respectively fluid connected to the two ends of the cylinder and energized in parallel with a continuous stream of pulse width modulated (PWM) pulses...  
WO/1996/030650A1
A low-cost, precision rotation control apparatus suitable for a large-output rotary actuator. This apparatus comprises a hydraulic rotary servo valve (4) having a rotary spool (40) and a rotary sleeve (20); an electric motor (5) having a...  
WO/1996/012109A1
A fluid actuator (11) for use in a fluid injector assembly (10) including a piston (12) arranged for reciprocation in a chamber (14), the piston (12) including a connected plunger (13) operating in an injection chamber (15). A control va...  
WO/1996/007029A1
A hydraulic actuating unit (1) is disclosed, having a positioning motor (2) which is arranged in a diagonal of a bridge circuit (3) having four electromagnetic valves (6, 7, 8, 9), the other diagonal being arranged between a pressure sou...  
WO/1996/005543A1
A control system is disclosed for hydraulic drives, in particular hydraulic cylinders, in which the valve that controls the hydraulic medium flow paths between the drive, the hydraulic medium source and a tank may be controlled by an ele...  
WO/1996/003586A1
The invention concerns a positioning drive which is used in particular for machine tools and which comprises a hydraulic motor (10). The hydraulic motor comprises: a control disc (17) which is rotatable with a motor shaft (18) and is pro...  
WO/1995/024565A1
In a hydraulic drive unit having a high-power hydraulic motor as the actuator, a main control valve, a hydraulic servo drive for actuating the main control valve and a tracking regulator valve which is provided for controlling the servo ...  
WO/1995/020781A1
A direct drive servovalve which includes as an integral part thereof, a motor rotor position sensor (46). The rotor position sensor (46) is used to generate an electrical signal which is representative of the degree of rotation of the ro...  
WO/1994/027201A1
In a control for a drive pressurised by a working fluid, the working fluid flows through an eletrovalve which determines the amount of working fluid to be suplied to the drive. The electric signal which controls the valve is generated by...  
WO/1994/001681A1
A fluid-operated power booster includes a housing (12) having a main piston (10) slidably mounted therein and a regulating chamber formed in the main piston. A regulating piston (22) is mounted within the regulating chamber and is fixed ...  
WO/1993/019300A1
A hydraulic cylinder (2) having a piston (1) and a linearly extending output shaft (15) controlled by a rotary spool valve (6). The rotary spool valve (6) has a ported outer part (8) rotatable by means of a control lever (7) to pressuriz...  
WO/1993/018445A1
A control system, more especially for use in a glassware forming machine, to control movement of a driven member (12), for example carrying molten glass, between first and second rest positions, wherein the member is driven via a pneumat...  
WO/1993/016287A1
A positioner (100) for use in pneumatic systems moves a pneumatic operator. The positioner is an electronic pilot positioner or eletronic to pneumatic interface which provides accurate positioning of linear actuators (250) in response to...  
WO/1993/010359A1
An air pressure operated apparatus, such as an oscillating air pressure operated apparatus having a cylinder piston type air cylinder and vanes, which apparatus can be moved to an arbitrary position and stopped, moved in the reverse dire...  
WO/1993/001470A1
An apparatus (102) is adapted to detect the linear extensions of a plurality of hydraulic cylinders. Each hydraulic cylinder defines a variable length coaxial resonant cavity. Under the control of a controller (112), a transmitting secti...  
WO/1992/022749A1
The invention relates to a method and arrangement for controlling a pressure fluid operated apparatus (22) by means of a control unit (1) and valve system (7). The motions of the control elements (3, 5) of the control unit (1) manipulate...  
WO/1992/016397A1
The invention discloses a hydraulic aggregate for hydraulic control or regulating devices, in particular for braking pressure regulating devices in antilock braking systems or drive slip control systems for motor vehicles. To effectively...  
WO/1991/019108A1
The invention concerns a double-acting piston cylinder (10) in which the piston movements are transmitted by a displacement sensor (14) to an electronic control system (16). Acting on the piston rod (13A) is a mechanical brake (46). The ...  
WO/1991/018204A1
A hydraulic drive device, especially for robot arms with several joints, has as the power drive an axial-piston hydraulic motor (13) in which the pressure medium supply is controlled by a follow-up servo valve (14) and there is an electr...  
WO/1991/014103A1
A pneumatic or hydraulic piston-cylinder unit, for example the drive of a pneumatic or hydraulic straightening press, has a cylinder (1) containing a piston (3) connected to a press ram (7). The piston (3) divides the cylinder (1) into a...  
WO/1991/005957A1
A driving cylinder (16) has essentially a control magnet arrangement (17), a control valve (18) and a cylinder housing (19) with driving piston (20) that surrounds the control valve (18). The control magnet arrangement (17) has a stator ...  
WO/1990/013747A1
A hydraulic drive (10) for the adjustment, feed and return movements of a tool head of a machine tool comprises a hydraulic motor (11) and an after-running adjustment valve (12). The reference value of the position is set and the actual ...  
WO/1990/007063A1
A novel digital servo valve system (10) for use in displacing an actuator (22) is capable of operating either in closed or open loop mode. The system includes a controller (18) that compares computed values of actuator parameters with pr...  
WO/1989/003939A1
A linear drive comprises a hydraulic unit (1), a control valve (5) and an actuating drive (9) with an actuating member (7). These elements are interconnected by means of two inertia drive starters (4, 8), which results in a mechanically-...  
WO/1988/004734A1
A load sensing circuit of a load responsive directional control valve (10) includes devices for sensing load pressure signals, for identifying the load pressure signals as positive or negative, and for transmitting the identified signals...  
WO/1988/003652A1
A pair of loop antennas (40, 44) mounted internal to an extensible coaxial cavity (20) respectively transmit and receive electromagnetic signals in the radio frequency range exciting a transverse electromagnetic field in the cavity (20) ...  
WO/1988/001697A1
A hydraulic idling-regulating valve (10) comprises at least two mechanically operated through-flow valves (21, 22), which can be alternately controlled in a flow position and a closure position, said valves being both closed in a central...  
WO/1987/007686A1
Means for the position servo-control of a pneumatic cylinder (14) comprising a circuit (20) for the control of the cylinder supply distributor (10), and a position sensor (30) and an acceleration transducer (34) which are associated with...  
WO/1987/005669A1
A circuit (110, 129, 143, 145) for obtaining higher accuracy and total system response for complex mechanical impedance loads, such as earthquake simulators, and in particular to compensate for limitations in controlling the actual valve...  
WO/1987/004762A1
The fluid-powered actuator (12) has a piston (24) with unequal opposed surface areas (A1, A2). Main valve (11) controls fluid flow to or from at least one of the chambers (28, 29) when a load opposes the piston movement. A negative load ...  
WO/1986/006445A1
A servo-regulating circuit for a hydraulic forward drive unit (10), which operates with an electrically-controlled set value of the position and with mechanical feed-back of the actual position. The flows of the working medium to and fro...  

Matches 151 - 200 out of 3,875