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)
05/1982
05/19/1982EP0051728A1 Hydraulic motor control system
05/18/1982US4330009 Exhaust pressurization of load responsive system
05/18/1982CA1123709A1 Differential area electrohydraulic doser actuator
05/12/1982EP0051186A1 Hydraulic system comprising a locking device for maintaining a control valve in its working position
05/05/1982EP0050656A1 Integral hydraulic blocking and relief valve.
05/04/1982US4327772 Valve device for controlling flow of fluid
05/04/1982CA1122881A1 Header height valve
05/04/1982CA1122880A1 Hydraulic control valve unit
04/1982
04/29/1982WO1982001402A1 Control system for pilot operated valve
04/21/1982EP0049714A1 Electro-magnetically controlled servomotor with follow-up action
04/20/1982US4325410 Control device for a hydraulically operated load
04/20/1982US4325408 Exhaust pressurization of load responsive system
04/20/1982US4325400 Fluid flow equalizing valve arrangement
04/20/1982CA1122101A1 High pressure hydraulic system
04/15/1982WO1982001226A1 Fluid viscosity control for actuator circuit
04/07/1982EP0049034A2 Hydraulic sequencing valve
04/06/1982US4323095 Balanced valve with unidirectional oleo-dynamic unlocking, in particular to allow a number of hydraulic actuators to be series controlled at high pressure
04/06/1982CA1121250A2 Flow line monitor pilot valve assembly
04/01/1982WO1982001042A1 Vent valve for cylinder mounted check valve
03/1982
03/30/1982CA1120827A1 Control valve for working machine
03/30/1982CA1120826A1 Control valve for working machine
03/23/1982US4320812 Flow control system for use in power steering apparatus
03/23/1982US4320691 Hydraulic load lifting system with hydraulic surcharge to make up valve pilot lines
03/23/1982CA1120376A1 Low pressure fluid supply valve system
03/18/1982WO1982000862A1 Actuator system for a control surface of an aircraft
03/16/1982US4319609 Five-position hydraulic actuating apparatus
03/09/1982US4318333 Bidirectional, multiple speed hydraulic actuator
03/03/1982EP0046524A1 Hydraulic remote controller
02/1982
02/23/1982US4316599 Servo-control valve
02/23/1982US4316486 Electrohydraulic control apparatus
02/17/1982EP0045928A1 Power transmission
02/03/1982EP0045206A1 Control valve
02/02/1982US4313468 Servo valve
02/02/1982US4313467 Control valve
01/1982
01/19/1982US4311296 Cartridge element control
01/19/1982US4311171 Hydrostatic steering controller with pressure dams
01/19/1982US4311006 Pressure compensated steering system
01/06/1982EP0042929A1 Dual pilot counterbalance valve
01/05/1982CA1115623A1 Fluid control valve system
12/1981
12/29/1981CA1115172A1 Piezoelectric control valve
12/29/1981CA1115170A1 Auxiliary spring assisted valve linkage
12/24/1981WO1981003689A1 Valve system
12/24/1981WO1981003686A1 Pressure reducing valve with floating stem for make-up vent
12/24/1981WO1981003685A1 Pressure reducing valve for dead engine lowering
12/22/1981USRE30828 Load responsive valve with constant leakage device
12/22/1981CA1114716A1 Hydraulic responsive air control valve
12/09/1981EP0041247A2 Pilot-operated device for load-independent flow control
12/09/1981EP0041199A1 Power transmission
12/02/1981EP0040737A1 Electro-hydraulic actuator for a turbine valve
12/02/1981EP0040697A1 Pressure-reducing device
12/01/1981US4303091 Hydraulic control apparatus for load independent flow regulation
12/01/1981US4303003 Switching valve
11/1981
11/26/1981WO1981003362A1 Load sensing porting arrangement
11/24/1981US4301832 Pressure converter valve
11/24/1981CA1112982A1 Fluid control system with individually variable flow control mechanism for each control section
11/17/1981US4300591 Anti-cavitation and overload relief valve for a hydraulic system
11/17/1981CA1112540A1 Fail-fixed servovalve
11/12/1981WO1981003208A1 Integral hydraulic blocking and relief valve
11/10/1981CA1112127A1 Valve and a wire cutting, skinning and wrapping tool employing the valve
11/04/1981EP0039247A2 Hydraulic control system
11/03/1981US4298181 Electronic actuated bleed valve
11/03/1981US4298027 Three-way normally closed pilot valve
10/1981
10/27/1981US4296773 Hydraulic selector valve having joy stick control
10/27/1981US4296676 Control mechanism
10/27/1981CA1111473A1 Electromagnetic positioner
10/21/1981EP0038128A1 Electro-hydraulic servo activator system
10/20/1981US4295390 Manual override control for double-acting actuator
10/14/1981EP0037746A2 A rotary actuator
10/06/1981US4293002 Electrically operated fluid control device
10/06/1981US4293001 Load responsive fluid control valve
10/06/1981US4293000 Load responsive fluid control valve
10/01/1981WO1981002768A1 Fluid circuit with zero leak load check and by-pass valve
09/1981
09/30/1981EP0036761A2 Fluid circuit with load check valve
09/29/1981US4291718 Pressure valve
09/22/1981US4290449 Load responsive control valve
09/22/1981US4290447 Electrohydraulic proportional valve
09/15/1981CA1108946A1 Control method and apparatus for preventing surge in a dynamic compressor
09/08/1981US4287911 Three speed fluid flow control valve
09/08/1981US4287812 Control valve
09/01/1981US4286770 Deformable plug
09/01/1981US4286432 Lock valve with variable length piston and hydraulic system for a work implement using the same
08/1981
08/25/1981US4285496 Electro-hydraulic systems
08/25/1981US4285363 Control valve construction
08/25/1981US4285362 Power transmission
08/25/1981US4285358 Servovalve feedback wire interface configuration
08/25/1981US4285267 Control device for hydraulic servomechanisms
08/25/1981CA1107604A1 Control valve with bypass means
08/18/1981US4283996 Header height valve
08/18/1981US4283990 Fluidic repeater
08/12/1981EP0033669A1 Servocontrol and its use in flight control devices of aircraft
08/11/1981US4282901 Proportional control type remote-control direction switching control valve device
08/11/1981US4282898 Flow metering valve with operator selectable boosted flow
08/06/1981WO1981002185A1 Electrohydraulic set device
08/04/1981US4282502 Electromagnetic positioner
08/04/1981US4281682 Proportional control type remote-control direction switching control valve device
07/1981
07/21/1981US4279334 Mechanical detent for three speed power shift transmission
07/21/1981US4279271 Pressure regulator and flow control valve with pre-exhaust
07/07/1981US4276811 Closed center programmed valve system with load sense
07/07/1981US4276810 Programmed valve system used for positioning control
07/07/1981CA1104460A1 Fluid flow manifold
1 ... 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188