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)
07/1981
07/07/1981CA1104459A1 Multiple function four poppet valve system
06/1981
06/30/1981US4275643 Hydraulic control systems
06/23/1981US4274443 Directional control valve
06/16/1981CA1103127A1 Combination check and flow control valve for hydraulic systems
06/16/1981CA1103031A1 Valve block
06/11/1981WO1981001595A1 Flow metering valve with operator selectable boosted flow
06/09/1981US4271864 Pressure regulating valve
05/1981
05/26/1981US4269111 Hydraulic apparatus
05/26/1981CA1101756A1 Pressure sensing regenerative hydraulic system
05/19/1981US4267862 Directional control valve with flow path through valve spool
05/19/1981CA1101524A1 Combined feedback control system
05/14/1981WO1981001316A1 Improved load resolver
05/12/1981US4266572 Electrohydraulic directional control valve system
05/12/1981US4266466 Hydraulic valve device
05/06/1981EP0028145A1 Pressure compensated steering system
05/06/1981EP0027854A1 Electrohydraulic control
05/05/1981US4265331 Fluidic repeater
05/05/1981US4265272 Transient start-up eliminator for pressure piloted valve
04/1981
04/30/1981WO1981001124A1 Pressure compensated steering system
04/28/1981US4263838 Pneumatic positioner
04/22/1981EP0027437A1 A transducer for electrohydraulic or electropneumatic signal conversion
04/21/1981US4262695 Flow rate control valve
04/16/1981WO1981001035A1 Electrohydraulic proportional valve
04/14/1981CA1099189A1 Switching valve
04/08/1981EP0026586A1 Flow control valve
04/07/1981US4259986 Control apparatus for a hydraulic power consumer
04/02/1981WO1981000893A1 Bidirectional,multiple speed hydraulic actuator
03/1981
03/31/1981US4258610 Control apparatus for a hydraulic power consumer
03/31/1981CA1098418A1 Circulating flow hydraulic pilot system
03/24/1981US4257572 Valve with internal accumulator and check valve
03/24/1981US4257456 Pressure compensated spool valve
03/18/1981EP0025107A1 Lock valve with variable length piston and hydraulic system for a work implement using the same
03/17/1981US4256142 Hydraulic control
03/17/1981US4256017 Differential area electrohydraulic doser actuator
03/17/1981CA1097738A1 Fast de-excitation brushless exciter
03/11/1981EP0024558A1 Selectively actuatable fluid control for a work implement
03/10/1981US4254799 Lapped spool valve assembly
03/10/1981US4254689 Fluidic repeater
03/10/1981US4254688 Low friction servo valve
03/10/1981US4254687 Flow control valve
03/10/1981CA1097182A1 Fluid control system with automatically actuated motor port lock-out valves
03/05/1981WO1981000600A1 Lock valve with variable length piston and hydraulic system for a work implement using the same
03/05/1981WO1981000598A1 Selectively actuatable fluid control system for a work implement
03/03/1981US4253482 Hydraulic valve having pressure compensated demand flow
03/03/1981CA1096746A1 Spool valve and pilot interface assembly
02/1981
02/17/1981US4251193 Flow control valve
02/17/1981US4250794 High pressure hydraulic system
02/11/1981EP0023591A1 Hydraulic control with a line rupture protection valve for a double-acting driving cylinder, used especially for positioning a strand guiding roller in a continuous casting plant
02/10/1981US4249570 Exhaust pressurization of load responsive system
02/10/1981US4249569 Load responsive fluid control valve
02/10/1981US4249557 Load resolver
02/10/1981US4249457 Vacuum servomotor
02/04/1981EP0023416A2 Hydraulic valve
02/03/1981US4248137 Feedback mechanism for variable displacement hydraulic device having an electrohydraulic controller
01/1981
01/28/1981EP0023012A2 Apparatus for the remote control of oil or gas wells
01/27/1981US4247133 Device with mounting plates for a valve battery
01/27/1981US4246832 Control arrangement for a hydraulic force transmission
01/21/1981EP0022755A1 Load control and holding valve
01/21/1981EP0022661A1 Hydraulic systems comprising open and closed centre valves
01/20/1981US4245671 Solenoid pilot operated valve
01/20/1981CA1093939A1 Locking cylinders
01/20/1981CA1093932A1 Directional control valve system
01/13/1981US4244396 Digital fluid flow control system
01/13/1981US4244275 Counterbalance valve
01/13/1981CA1093426A1 Servo valve
01/13/1981CA1093425A1 Counterbalance valve
01/07/1981EP0021977A1 Hydraulic directional valve, especially for servocontrols in aeroplanes and helicopters
01/07/1981EP0020451A1 Closed center draft control valve
12/1980
12/30/1980CA1092585A1 Fluid flow governing valve means
12/30/1980CA1092484A1 Electrohydraulic flow control valve
12/09/1980US4238112 Spool spin prevention for hydraulic control valves
12/09/1980US4237771 Pneumatically operated actuator and method of making the same
12/02/1980CA1090709A1 Hydraulic control valve
12/01/1980EP0020451A4 Closed center draft control valve.
11/1980
11/26/1980EP0019597A2 Safety device for hydraulic circuits
11/25/1980US4235415 Auxiliary spring assisted valve linkage
11/18/1980CA1089741A1 Electrically operated proportional flow control hydraulic valve and manually operable remote control device therefor
11/12/1980EP0018832A2 Improvements in or relating to positioners
11/11/1980US4232701 Flow divider valve
11/04/1980US4231441 Flow divider valve assembly
11/04/1980US4231396 Load responsive fluid control valves
10/1980
10/29/1980EP0017868A1 Operation monitored valve arrangement
10/28/1980US4230143 Control valve arrangement for dental equipment
10/21/1980US4229144 Feedback shaft extending between swashplate and displacement control valve
10/15/1980EP0017592A1 Hydraulic actuating device with five positions
10/15/1980EP0017537A2 Electrohydraulic doser actuator
10/14/1980US4227549 Fluid pressure control valves
10/14/1980US4227443 Fail-fixed servovalve
10/14/1980US4227441 Hydraulic servo-motor for a regulating valve having a hydraulic closing mechanism
10/14/1980US4227440 Fluidic repeater
10/07/1980US4226262 Load responsive control valve
10/01/1980EP0016719A1 Hydraulic motor control device
10/01/1980EP0016436A2 Servo valve
10/01/1980EP0016074A1 Pneumatically operated control valve for pneumatic control at low pressure and working pressure.
09/1980
09/30/1980US4225089 Fluid flow manifold
09/23/1980US4223693 Counterbalance valve
09/23/1980US4223533 Device for the power-assisted control of a hydraulic transmitter
09/17/1980EP0015492A2 Hydraulic control device for load-independent flow regulation
09/16/1980USRE30403 Safety valve for fluid systems
09/16/1980US4222409 Load responsive fluid control valve
1 ... 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188