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 11 - Servomotor systems without provision for follow-up action
Patents for F15B 11 - Servomotor systems without provision for follow-up action (16,384)
03/1982
03/02/1982US4317331 Hydraulic circuit for a hydraulically driven vehicle
02/1982
02/23/1982US4316486 Electrohydraulic control apparatus
02/16/1982CA1118342A1 Method and apparatus for hydraulically controlling subsea equipment
02/03/1982EP0045228A1 Multiple position digital actuator and method of digitally controlling a multiple position actuator element
02/02/1982US4313366 Electromagnetic valve assembly
02/02/1982CA1117396A1 Stroke-adjusting drive mechanism for machines
01/1982
01/26/1982CA1116858A1 Apparatus for straight line shearing
01/20/1982EP0044065A2 Load sensing hydraulic system
01/19/1982US4311083 Absolute-control numerical hydraulic actuating device
01/19/1982CA1116496A1 Margin valve
01/19/1982CA1116495A1 Hydraulic system for simultaneous control, especially for the control of electric circuit breakers
01/12/1982US4309936 Stacker with improved hydraulic cylinder movement
01/12/1982CA1116030A1 Multi position fluid actuator
01/05/1982US4308721 Fluid supply systems
01/05/1982CA1115623A1 Fluid control valve system
12/1981
12/30/1981EP0042682A1 An hydraulic system and vehicle including same
12/30/1981EP0042547A2 Hydraulic circuit with a variable flow pump controlled by excess flow
12/24/1981WO1981003689A1 Valve system
12/24/1981WO1981003685A1 Pressure reducing valve for dead engine lowering
12/22/1981USRE30828 Load responsive valve with constant leakage device
12/22/1981US4306840 Automatic connecting valve for hydraulic systems
12/22/1981US4306488 Pressure-compensated directional control valve
12/22/1981CA1114718A1 Inching valve of the hydraulic balance type
12/16/1981EP0041686A2 Hydraulic circuit arrangement
12/10/1981WO1981003527A1 Hydraulic piston cylinder device with a valve element
12/09/1981EP0041199A1 Power transmission
12/08/1981US4304389 Remote control apparatus for hydraulically actuated devices
12/08/1981CA1113834A1 Load sensing control for hydraulic system
11/1981
11/26/1981WO1981003364A1 Series-parallel selector for steering and implement
11/24/1981CA1112982A1 Fluid control system with individually variable flow control mechanism for each control section
11/17/1981US4300584 Hydraulic sequence valve
11/17/1981US4300351 Boosted hydro-pneumatic drive
11/12/1981WO1981003165A1 Boom turning control device for hydraulic drive type crane
11/11/1981EP0039573A2 Improvements in high pressure hydraulic systems
11/11/1981EP0039473A1 Hydraulic power transmission system
10/1981
10/28/1981EP0038757A1 Pressure fluid distribution circuit
10/28/1981EP0038638A2 Improvements in high pressure hydraulic systems
10/27/1981US4296677 Tandem hydraulic actuator
10/21/1981EP0038128A1 Electro-hydraulic servo activator system
10/15/1981WO1981002914A1 Control for load sharing pumps
10/13/1981US4294067 Method and apparatus for doffing and donning bobbins in a spinning machine
10/06/1981US4293059 Detent mechanism and transmission speed range selector valve
10/06/1981US4293001 Load responsive fluid control valve
10/06/1981US4293000 Load responsive fluid control valve
10/06/1981US4292884 Control arrangement for a hydraulically operated device
10/01/1981WO1981002769A1 Pneumohydropumping installation
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
09/23/1981EP0036070A2 Pressure regulating hydraulic circuit and valve
09/22/1981US4290448 Load responsive control valve
09/22/1981US4290343 High volume poppet valve with orifice opening speed control
09/22/1981CA1109364A1 Integrated transmission-engine control
09/17/1981WO1981002641A1 Pressure regulating hydraulic circuit and valve
09/15/1981US4288987 Pneumo-hydraulic booster with rapid-traverse feature
09/09/1981EP0035157A1 Arrangement of hydraulic resistors and arrangement for producing a speed proportional signal
09/08/1981US4287911 Three speed fluid flow control valve
09/03/1981WO1981002448A1 Hydro-pneumatic installation
09/02/1981EP0034900A1 Civil engineering and construction machinery with hydraulic drive system
09/01/1981US4286692 Hydraulic control system for operating multiple remote devices with a minimum number of connecting conduits
09/01/1981US4286502 Hydraulic load lifting system with automatic blocking valve
09/01/1981US4286432 Lock valve with variable length piston and hydraulic system for a work implement using the same
08/1981
08/25/1981US4285268 Automatic sequencing valve and system
08/25/1981US4285267 Control device for hydraulic servomechanisms
08/25/1981US4285195 Load responsive control system
08/25/1981US4285126 Hydraulically actuated apparatus
08/25/1981CA1107604A1 Control valve with bypass means
08/18/1981CA1107174A1 Hydraulic system with unloading valve assembly
08/11/1981US4282898 Flow metering valve with operator selectable boosted flow
08/11/1981CA1106732A1 Double-plate control device
08/04/1981CA1106261A1 Hydraulic oscillator
07/1981
07/28/1981US4280397 Hydraulic fluid control apparatus
07/28/1981US4280396 Hydraulic oscillator
07/28/1981CA1105800A1 Overload relief valve
07/22/1981EP0032300A1 Fluid control system
07/21/1981US4279271 Pressure regulator and flow control valve with pre-exhaust
07/21/1981US4279269 Liquid flow control means for gas-liquid receptacle
07/21/1981CA1105361A1 Motor displacement control system
07/14/1981US4278010 Fluid flow regulator valve
07/09/1981WO1981001868A1 Hydraulic circuit for hydraulic crane
07/07/1981US4276813 Pneumatic cylinder assemblies
07/07/1981CA1104466A1 Reset means for fluid control circuit
07/07/1981CA1104459A1 Multiple function four poppet valve system
06/1981
06/30/1981US4275997 Hydraulic pump with proportional pressure controller
06/23/1981CA1103556A1 Apparatus for providing different flow rates of a fluid
06/16/1981CA1103233A1 Drill boom arrangement
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
06/09/1981US4271749 Reduced back pressure, anti-cavitation valve system
06/09/1981US4271671 Two step pressure intensifier system
06/02/1981CA1102217A1 Hydraulic control system
06/02/1981CA1102216A1 Hydraulic control system for operating multiple remote devices with a minimum number of connecting conduits
05/1981
05/26/1981US4269111 Hydraulic apparatus
05/26/1981CA1101834A1 Drill boom arrangement
05/26/1981CA1101756A1 Pressure sensing regenerative hydraulic system
05/19/1981US4267860 Load responsive valve assemblies
05/14/1981WO1981001311A1 Fluid motor control system providing speed change by combination of displacement and flow control
05/13/1981EP0028448A2 Fluid motor control system
05/12/1981US4266749 Drill boom arrangement
05/12/1981US4266467 Differential pressure limiting valve
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