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 13 - Details of servomotor systems
Patents for F15B 13 - Details of servomotor systems (18,792)
10/1990
10/10/1990EP0391307A1 Hydraulic control circuit arrangement for a single-acting cylinder
10/10/1990EP0391269A1 Solenoid valve bank
10/04/1990WO1990011464A1 Valve device and hydraulic driving apparatus
10/04/1990WO1990011453A1 Hydraulic valve capable of pressure compensation
10/03/1990EP0389787A2 Multiple way valve
10/03/1990EP0389777A1 Collecting plate connection
10/03/1990EP0389776A1 Manifold block
10/03/1990CN1009857B Valve base with integral flow controls
10/02/1990US4960393 Plug connecting device for electrical equipment
10/02/1990CA1274748A1 Balanced hydraulic propulsion system
09/1990
09/27/1990DE3909291A1 Directional valve with pressure balance
09/27/1990DE3908721A1 Pressure balance
09/26/1990EP0389136A1 Float circuit for boom of construction apparatus
09/26/1990EP0388635A1 Electrohydraulic actuator
09/25/1990US4959581 Servo valve having a piezoelectric element as a control motor
09/25/1990US4958553 Hydraulic controller
09/19/1990EP0387533A2 Direct-operated servo valve, fluid pressure servo mechanism and control method for the direct-operated servo valve
09/19/1990CN2062388U High pressure micro-flow valve
09/19/1990CN1009675B Valve device
09/12/1990EP0386263A1 Poppet valve device
09/11/1990US4955283 Hydraulic circuit for cylinder
09/11/1990CA1273859A1 Open center unloading valve
08/1990
08/30/1990DE3905654A1 Hydraulic control arrangement
08/29/1990EP0384157A2 Hydraulically pilotcontrolled two-way-built-in-valve in seat-valve-style
08/28/1990US4951709 Hydraulic system and manifold assembly
08/28/1990US4951549 Digital servo valve system
08/22/1990EP0383560A1 Operation control method and device for construction machine
08/21/1990US4949757 Hydraulic control system
08/21/1990US4949741 Power transmission
08/15/1990CN2060486U Hydraulic differential reverse generator
08/14/1990US4947733 Valve subplate for alternative double-acting or single-acting operation of cylinder
08/08/1990EP0381361A1 Multiplex control systems
08/08/1990CN1044520A Compressed air recovery equipment
08/08/1990CN1009127B Jam compensating control valve
08/07/1990US4945723 Hydraulic excavator
08/01/1990EP0380234A1 Multiplexed control systems
08/01/1990EP0380053A2 Capacity control valve
07/1990
07/26/1990DE4000069A1 Pressure-limiting and flow-regulating valve - has groove in stepped seat into which adjusting sleeve is pressed
07/25/1990EP0378789A2 Electrohydraulic control system for controlling a hydraulic drive
07/25/1990CN1008932B Digital pulse-valve system
07/23/1990CA2008281A1 Multiplexed hydraulic control systems
07/19/1990DE3901350A1 Pressure balance for a directional control valve
07/18/1990EP0377898A1 Single-stage actuator with a piston rod locking device
07/18/1990CN1043980A Multi-port self-regulating proportional pressure control valve
07/17/1990US4941321 Directional control with load-sensing passage controlled by throttling non-return valve having adjustable biasing spring
07/12/1990WO1990007667A1 High-speed flow rate control valve
07/11/1990EP0377544A1 Proportional directional valve for controlling hydraulic actuators
07/11/1990CN2059195U Double fastening hydraulic lock
07/05/1990DE3844412A1 Proportional valve activated on one side and having a safety device
07/05/1990DE3844411A1 Proportional valve activated on one side and having a centring position
07/05/1990DE3844400A1 Valve arrangement for a hydraulic system
07/04/1990EP0376440A1 Multi-port self-regulating proportional pressure control valve
07/04/1990EP0376023A2 Electrohydraulic proportional valve
07/04/1990EP0375916A1 Directional valve for controlling a hydraulic cylinder
07/03/1990US4938249 Chip tolerant flapper
07/03/1990US4938118 Control valve
07/03/1990US4938022 Flow control system for hydraulic motors
07/03/1990CA1271106A1 Fluid valve structures
06/1990
06/28/1990WO1990007063A1 Digital servo valve system
06/27/1990EP0375372A1 Multiplexed hydraulic control systems
06/27/1990EP0301007A4 Servovalve drive electronics improvements.
06/27/1990CN2058704U Selection valve body of truck crane sustaining valve
06/26/1990US4936032 Safety valve for hydraulic receiver and hydraulic circuit comprising same
06/21/1990DE3841985A1 Electrohydraulic servo actuating system for standard directional valves
06/20/1990CN1043192A Valve base with integral flow control valves and common exhaust passage
06/19/1990US4934411 Insert means for fluid flow system
06/19/1990CA1270422A1 Load responsive system using load responsive pump control of a bypass type
06/14/1990WO1990006463A1 Abnormal pressure prevention-vacuum prevention valve
06/13/1990EP0373095A1 Apparatus for positioning a work implement
06/12/1990CA2005253A1 Digital servo valve system
06/12/1990CA1270176A1 Compensated fluid flow control valve
06/07/1990DE3840442A1 Pneumatic or hydraulic shuttle valve
06/06/1990EP0371030A1 Adjustment assembly for valve spool and associated centering spring
06/05/1990US4930403 Directionally controlled hydraulic cylinder
06/05/1990CA1269912A1 Control system for independent control of fluid actuated devices
05/1990
05/31/1990WO1990005853A1 Hydraulic circuit
05/31/1990DE3840328A1 Pilot-controlled directional control valve
05/30/1990EP0370070A1 Synthetisized flow-control servovalve.
05/30/1990CN1008200B High water base cone valve type electro-hydraulic reversal valve
05/30/1990CN1008198B System for controlling hydraulic pressure
05/29/1990US4929038 Hydraulic unit
05/23/1990DE3839268A1 Hydraulic compensating valve
05/22/1990US4926905 Manually operated air valve and actuator in combination control a hydraulic spool valve for maneuvering heavy equipment
05/16/1990EP0368636A2 Hydraulic control system
05/16/1990EP0368322A2 Control lever apparatus and actuator operation apparatus
05/16/1990EP0368148A1 Spool valve
05/15/1990US4924902 Hydraulic control valves
05/09/1990EP0366909A1 Manifold block
05/09/1990EP0366815A1 Hydraulic drive unit for construction machinery
05/08/1990US4922964 Servovalve construction
05/08/1990US4922963 Hydraulic servovalve
05/02/1990EP0366605A1 Electrohydraulic or like pneumatic actuator
05/02/1990EP0366119A1 Operating force controlling device for operating lever
05/01/1990US4920858 Numerical control apparatus for a mechanical hydraulic servo valve
04/1990
04/26/1990DE3839952C1 Hydraulic spool valve
04/25/1990EP0364603A1 Hydraulic pilot valve
04/24/1990CA1268098A1 Control arrangement for controlling a hydraulic drive for driving a piston pump
04/19/1990DE3834816A1 Control device
04/19/1990DE3834815A1 Control device
04/17/1990US4917138 Priority flow control valve for hydraulic power circuits
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