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| Number | Title | Issue Date |
| 7624671 | Hydraulic actuator for a servomotor with an end lock function A hydraulic actuator for a hydraulic servomotor (4) is disclosed. The hydraulic servomotor (4) is of a kind having at least one defined end position, and has a first chamber (5) and a second chamber (6) associated therewith. The actuator ... | 12/01/2009 |
| 7134640 | Valve for controlling fluids A valve for controlling fluids, including a housing in which an armature for actuating an actuating element is disposed, a valve insert disposed coaxially to the armature and an intermediate element disposed between the armature and the valve insert with the interme... | 11/14/2006 |
| 7032499 | Hydraulic circuit and method for operating a sealing device A hydraulic circuit and method for operating a hydraulic device according to which fluid is passed from a source to the device while some of the fluid is passed to a valve that is adjustable to control the amount of fluid passed to it and therefore the amount of flu... | 04/25/2006 |
| 6827053 | Camshaft control device and control valve with leakage compensation The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting element (... | 12/07/2004 |
| 6701877 | Camshaft control device and control valve with leakage compensation The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting e... | 03/09/2004 |
| 6415703 | Method for controlling the motion velocity of a hydraulically driven machine, a drive system for a hydraulically driven machine The present invention concerns a method for controlling the speed of motion of a hydraulically operated machine, an operating system and a control device of the machine. The flow line (3) of the medium from the pump (2) to the machine (1) is divided into ... | 07/09/2002 |
| 6389950 | Manually controlled lifting device with a pneumatic lift drive mechanism A manually controlled lifting device is provided including a pneumatic lifting drive, a lifting member, a load carrying means, a pressure source, a pressure line, a flow control device, a pneumatic pressure switch and a vent drive. The lifting member is a... | 05/21/2002 |
| 6338466 | Water well recharge throttle valve A water well recharge throttle valve (1) is configured as a hydraulic actuated flow control device (5) that permits calibrated throttling of water used in Artificial Storage and Recovery (ASR), Salt Water Barrier, Dedicated Recharge and Injection Wells to... | 01/15/2002 |
| 6327518 | Off-line teaching apparatus An off-line teaching apparatus includes an operation command-receiving device for receiving an operation command inputted via an input/output port from a key input device or a coordinate input device and successively storing the operation command in a buf... | 12/04/2001 |
| 6290474 | Machine hydraulic system A machine, in particular an industrial truck, is provided with a hydraulic system that has at least one reservoir (1) for hydraulic fluid and at least one hydraulic pump (5). The hydraulic pump (5) is located inside the reservoir (1). A priority valve (8a... | 09/18/2001 |
| 6260467 | Hydraulic circuit providing plural swing rates in an earthworking construction machine A construction machine, e.g., a backhoe, has a chassis and a digging tool mounted for movement, e.g., swinging movement, with respect to such chassis. A machine hydraulic circuit includes a pump, a hydraulic actuator coupled to the tool for tool movement,... | 07/17/2001 |
| 6223645 | Compressed air flow rate controller for paint sprayer system A controller for controlling the flow rate of compressed air to a spray paint gun as well as to a comparable tool which is optimally operative dependant upon receiving a specified flow rate of air includes a flow control valve which regulates the air flow... | 05/01/2001 |
| 6192781 | Assembly for reversing a fluid driven motor An assembly for reversing a fluid driven motor. The assembly includes a fluid driven motor, and a reversing valve that reverses inlet and exhaust porting to and from the fluid driven motor. An actuation device opens an actuation valve and a fluid supply v... | 02/27/2001 |
| 6065386 | Hydraulic device for controlling a hydraulic-fluid flow The invention concerns a hydraulic device for controlling the hydraulic-fluid flow to and from a single-acting cylinder (3) on which a load (4) acts. Located between a pump (1) and the cylinder (3) is a controlled valve array (5) which, together with a co... | 05/23/2000 |
| 5996623 | Hydraulic directional-control valve A hydraulic directional-control valve comprises a first inlet part, a second inlet part, a tank port, a work part and a valve member which is movable from a neutral position to a operating position. In the neutral position, the valve member connects the f... | 12/07/1999 |
| 5992293 | Cylinder device The invention concerns a device in an piston cylinder aggregate including a valve element (8) which comprises a valve body (9) for choking the flow in a fluid channel (6) in co-operation with a valve opening (7), wherein the device is arranged in a bore (... | 11/30/1999 |
| 5960696 | Hydraulic cylinder with press-fitted pipe It is intended to dispense with the pipe welding work, thereby improve the pipe mounting performance and prevent contamination which results from welding, and elimination the waste of oil. A spigot portion 34 is mounted upright integrally in the center of the ... | 10/05/1999 |
| 5893428 | Hydraulic power steering In a hydraulic power steering for a motor vehicle with a hydraulic servomotor and a servovalve arrangement in communication with opposite servomotor actuating chambers by way of separate communication conduits through which the actuating chambers can be p... | 04/13/1999 |
| 5832805 | Method and apparatus for controlling speed of hydraulic cylinder In order to improve speed controllability both in low and high speeds, thereby stabilizing the speed of a hydraulic cylinder, both the flow-in amount of hydraulic operating fluid flowing from a hydraulic source to the hydraulic cylinder having a run-aroun... | 11/10/1998 |
| 5809862 | Flotation control system A flotation control system for controlling the boom of a tractor or brush cutting machine. Three hydraulic valves operate together and work in conjunction with the existing main valve of the tractor or brush cutting machine to provide flotation control or... | 09/22/1998 |
| 5791226 | Fluid regeneration device for construction vehicles A return fluid regeneration device for construction vehicles is provided. The regeneration device includes an orifice disposed on a return-side internal line of a directional control valve of an actuator. A regeneration line is arranged between the return... | 08/11/1998 |
| 5778930 | Add-in device for a hydraulic control arrangement An add-in device for a hydraulic control arrangement provides a function unit (24) to be arranged between successive modules, which function unit takes the connection between the pump channels of the preceding and the subsequent module by way of at least ... | 07/14/1998 |
| 5669280 | Hydraulic control apparatus A hydraulic control apparatus for a hydraulically operated vehicular transmission has control valves corresponding to hydraulic engaging elements provided in the transmission. The supply and discharge of hydraulic oil to and from the corresponding hydraul... | 09/23/1997 |
| 5644915 | Control system for a hydraulic press brake A control system for controlling the movement of the ram of a press or press brake of the type having one or two main cylinders with pistons operatively attach to the ram. The control system comprises a programmable processor with inputs from a pressure t... | 07/08/1997 |
| 5618022 | Variable orifice valve The Variable Orifice Valve is disclosed and the preferred embodiment of a hydraulically acruated-- flow control device that permits the calibrated throttling of water used in a Artificial Storage and Recovery (ASR), Dedicated Recharge, Injectio... | 04/08/1997 |
| 5615991 | Variable priority device for heavy construction equipment A variable priority device for heavy construction equipment for establishing a priority of the boom over the bucket by limiting an amount of fluid passing through a bucket-side parallel fluid line when the boom operates alone and thereby decreasing the am... | 04/01/1997 |
| 5325761 | Switching arrangement for controlling the speed of hydraulic drives A switching arrangement for controlling the speed of hydraulic drives, wherein a speed of the drive is assigned to a corresponding flow rate of a hydraulic medium. The flow rate is determined by a preselected pair of phased nozzles placed in the inlet and... | 07/05/1994 |
| 5307728 | Control arrangement for regulating the speed of a pressure cylinder A control arrangement for regulating the speed of a pressure cylinder increases the controllable flow volume through a proportional-action (control) valve, while avoiding a larger valve or two valves of the same type that must be connected in parallel. A ... | 05/03/1994 |
| 5308215 | Passenger lift movable at variable speeds A hydraulic drive passenger lift with distinct lifting "up and down" (loading, unloading) and "fold-unfold" (storage) motion patterns, includes a flow control structure that accommodates various hydraulic flows, somewhat unrestricted for "up-and-down" mov... | 05/03/1994 |
| 5287885 | Hydraulic control system for weighing and two-way valve therefor A motion control system for hydraulically operated lifting devices. The system provides for the dynamic weighing of a loaded container by controllably directing hydraulic flow through a bypass chamber of a two-way valve. An analog output signal is generat... | 02/22/1994 |
| 5233910 | Pressure holding valve A pressure holding valve for pressure-fluid-actuated leveling systems in vehicles, having at least one seat valve with a valve opening, a valve seat and a valve member in which the valve member is opened by a control piston acted upon by pressure fluid. I... | 08/10/1993 |
| 5195418 | Hydraulic control system for weighting and two-way valve therefor A motion control system for hydraulically operated lifting devices. The system provides for the dynamic weighing of a loaded container by controllably directing hydraulic flow through a bypass chamber of a two-way valve. An analog output signal is generat... | 03/23/1993 |
| 5193433 | Piston sealing and dampening device Piston sealing and dampening device in a pressurized-fluid cylinder, where a piston (3) has a central recess (3a) facing towards a cylinder end cap (1a) and disposed such that when the piston is in the vicinity of its end position, said recess accommodate... | 03/16/1993 |
| 5186093 | Electrically controlled pressure-regulating system for a hydraulic circuit The pressure-regulating system for a hydraulic circuit, comprises at least one generator (22) of fluid under pressure, a hydraulic motor (20), a reservoir (24) of fluid under low pressure and a solenoid valve controlled by a computer and comprising an ele... | 02/16/1993 |
| 5174422 | Transmission equipped with torque converter A transmission equipped with torque converter having a forward/backward change valve for supplying working oil selectively to any one of a forward clutch or a backward clutch. A shock diverter valve is installed between the forward/backward change valve a... | 12/29/1992 |
| 5165320 | Fluid-controlled servo-arrangement Disclosed is an arrangement that includes a piston cylinder unit having pressure chamber in which fluid acts in opposition to a spring piston combination, a pressure generator and a fluid conduit extending between a tank and the tank. A first and a second... | 11/24/1992 |
| 5142963 | Load referenced pressure reducing valve A load-referenced, pressure reducing valve, and a system which incorporates one or more of such valves provide needed response to rapidly changing hydraulic system load demands which are experienced with automatic control systems. The valve provides rapid... | 09/01/1992 |
| 5133424 | Variable assist power steering control valve A variable assist power steering system for an automotive vehicle, the system having a source of hydraulic fluid (10), a power steering assembly (30) having a low speed inlet (32) and a high speed inlet (34), and a control valve (50) for continuously deli... | 07/28/1992 |
| 5123509 | Control valve for a hydraulic switch clutch Hydraulic pressure representing engine throttle position is applied to a valve spool having two control surfaces. In opposition to the force of a control spring, a pressure line, which opens to the valve chamber between the two control surfaces, carries r... | 06/23/1992 |
| 5115640 | Fluid controller and logic control system for use therewith An improved fluid controller (15) is provided having both rotary valving (47) actuated by the steering wheel (17), and axial valving (49) controlled by an electro-hydraulic valve (113) in response to a correction signal (31). In one embodiment, both the r... | 05/26/1992 |
