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| Number | Title | Issue Date |
| 7430955 | Hydraulic arrangement A hydraulic arrangement is provided for a tool locking device of a loader. The hydraulic arrangement comprises a hydraulic cylinder with first and second chambers, which cylinder has a first position for unlocking and a second position for locking, a first supply li... | 10/07/2008 |
| 7320272 | Hydraulic system The present application relates to a hydraulic system having a hydraulic supply, a consumer and having a control valve, which is in communication with the consumer by means of a first line and a second line, it being possible for the control valve to be switched int... | 01/22/2008 |
| 7210393 | Progressive-starting unit for pneumatic systems A progressive-starting unit for pneumatic circuits comprises a line inlet and a line outlet interconnected with each other by a regulating valve that is piloted by a pneumatic piloting inlet. The piloting inlet is controlled by the outlet of a progressive-starting d... | 05/01/2007 |
| 7194829 | Labeler for pipes, conduits, tubes, and rods A pipe or conduit labeler includes a saddle leg having an inside diameter equal to or slightly smaller than an outside diameter of a pipe or conduit to be labeled. The saddle leg is molded to a saddle stem which in turn is molded to a sign plate. A user either write... | 03/27/2007 |
| 7056106 | Discharge valve apparatus for reciprocating compressor A discharge valve apparatus for a reciprocating compressor comprises a discharge cover having built-in volume so as to cover a front end surface of the cylinder; a discharge valve disposed so as to be contacted/separated to/from the front end surface of the cylinder... | 06/06/2006 |
| 7007588 | Device for adjusting the pressure in a hydraulic jack The invention relates to a device for adjusting the pressure in the chambers of a hydraulic jack comprising a hollow valve seat extending substantially longitudinally between two end sections, the body of the valve seat being connected to a source of pressurised flu... | 03/07/2006 |
| 6805328 | Shut-off valve apparatus A shut-off valve apparatus has a valve body and a valve member coupled to the valve body. The valve member is movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body. A pneu... | 10/19/2004 |
| 6666125 | Swing cylinder oscillation control circuit and valve for oscillating booms A swing cylinder oscillation control circuit and valve for oscillating booms connects two hydraulic cylinders with a shuttle valve and two check valves to provide the higher cylinder pressure to a fluid inlet and a lower cylinder pressure to a fluid outle... | 12/23/2003 |
| 6446538 | Arrangement for hydraulic actuation of a movable component on vehicles An arrangement for hydraulic actuation of a movable component on vehicles, particularly a vehicle top, trunk lid, a cover or the like, includes at least one double-action working cylinder (1) whose working chambers are connected to a pressure source (5) v... | 09/10/2002 |
| 6435310 | Hydraulic elevator system A hydraulic elevator system of an inverter control method directly controlling a flow amount of a pressed oil discharged from a hydraulic pump by a speed control of a motor driving the hydraulic pump, which can improve energy efficiency and stability. The... | 08/20/2002 |
| 6422126 | Power steering apparatus In a power steering apparatus provided with a damper valve, a second valve apparatus of the damper valve is provided with a valve plate in contact with and apart from a partition member so as to open and close a through flow passage provided in the partit... | 07/23/2002 |
| 6382076 | Piston servo-actuation main system with hydromechanically self-contained detection Main piston servo-actuation system, with hydromechanic self-contained failure detection device, working with hydraulic fluid supplied by a pump, including two servovalves (1 and 2) which are identical in design, controlling a piston (3) mechanically linke... | 05/07/2002 |
| 6347768 | Automatic and sequencing actuation assembly for a weapon ejection system and associated method An automatic and sequencing pneumatic actuation assembly is provided for use in an ejection system capable of unlocking and forcibly ejecting stores from racks mounted on an aircraft or similar weapon carrier. The actuation assembly including a primary va... | 02/19/2002 |
| 6182697 | Rotary directional valve with integral load holding check A cartridge valve assembly (19) including a sleeve valve (49) fixed within a valve housing (17), and a spool valve (47) moveable both axially and rotatably within the sleeve valve. Rotation of an input (35,39) causes rotation of a cam member (43) and the ... | 02/06/2001 |
| 6098647 | Load-holding brake valve A hydraulically controllable valve for double-acting consumers that in the lowering mode drains off a flow of load volume from connection B to connection A in throttled fashion. To that end, the valve has a valve seat (5), which communicates with a sealin... | 08/08/2000 |
| 6073444 | Combination valve including improved neutral valve for use in hydrostatic transmission A valve mechanism for use in a hydrostatic transmission including a closed porting system for hydraulic fluid and a sump is provided. The valve mechanism includes a valve body mounted to the hydrostatic transmission whereby the valve body is open to the c... | 06/13/2000 |
| 5904067 | Adjustable-torque screwdriving spindle assembly A screwdriving spindle assembly comprising a spindle shaft provided with a holding device and secured to a gear wheel rotated by a drive assembly which comprises a pressurized fluid actuating cylinder having a piston rod secured to a transmission system, ... | 05/18/1999 |
| 5873297 | Fluid-operated brake actuator with check valve A fluid-operated brake actuator having a check valve in the spring chamber to equalize the pressure on opposite sides of an operating movable diaphragm. The check valve being double redundant and tamper resistant and comprising a tubular body having a fir... | 02/23/1999 |
| 5857647 | Integral accumulator valve and ram assembly for pneumatic weapon ejection system A pneumatic actuation assembly for use in an ejection system capable of unlocking and forcibly ejecting stores from racks mounted on an aircraft or similar weapon carrier. The actuation assembly including a primary valve and release ram attached to one-an... | 01/12/1999 |
| 5855116 | Combination valve including improved neutral valve for use in a hydrostatic transmission A valve mechanism for use in a hydrostatic transmission including a closed porting system for hydraulic fluid and a sump is provided. The valve mechanism includes a valve body mounted to the hydrostatic transmission whereby the valve body is open to the c... | 01/05/1999 |
| 5848779 | Servomotor, particularly for a quick-action stop valve A controlling motor for moving a stem along an axis has a hydraulic actuator with a cylinder in which a piston that is frictionally linked to the stem is slidingly and sealingly mounted, as well as a compression spring that is frictionally linked to the s... | 12/15/1998 |
| 5680806 | Compressible fluid flow control valve and constant speed pneumatic motor application therefor A flow control valve has a gate connected between an operating fluid inlet and outlet. An actuator permits manual adjustment of the gate area to allow fluid to pass from the inlet to the outlet at a threshold rate of flow for a threshold pressure at the f... | 10/28/1997 |
| 5651436 | Brake and clutch control system A control system for a press having a clutch and a brake includes a clutch control valve and a brake control valve. The clutch control valve operates the clutch by supplying pressurized air to the clutch. The brake control valve operates the brake by supp... | 07/29/1997 |
| 5546752 | Combination valve including improved neutral valve for use in hydrostatic transmission A valve mechanism for use in a hydrostatic transmission including a closed porting system for hydraulic fluid and a sump is provided. The valve mechanism includes a valve body mounted to the hydrostatic transmission whereby the valve body is open to the c... | 08/20/1996 |
| 5501136 | Control system for a hydraulic motor A control means for a hydraulic motor connected to an external load comprises a directional valve (10) for selectively feeding hydraulic fluid to the motor from a pressure source and including load pressure sensing means (24, 25) connected to a load compe... | 03/26/1996 |
| 5473828 | Structure of a clamshell bucket and a hydraulic control circuit To excavate sticky soil such as clayey soil, left and right buckets of a clamshell bucket are slightly inclined, thereby reducing the force to pull the buckets from a hole. The clamshell bucket includes left and right buckets which are closable, thereby h... | 12/12/1995 |
| 5467596 | Unitary electro-hydraulic rotary actuator for automotive convertible top A self-contained rotary actuator assembly has a pump assembly, a precharged hydraulic circuit, and a rotary vane actuator in a single unit. The pump assembly is a bi-directional electric motor driven gerotor pump which is manifolded to a module assembly i... | 11/21/1995 |
| 5467688 | Operating valve device An operating valve device for supplying fluid under pressure to an actuator comprises: a first hole (3) and a second hole (4) for allowing fluid under pressure supplied by a pump (P) into an inlet port (2) connected with the pump to selectively flow into ... | 11/21/1995 |
| 5447093 | Flow force compensation In load sensing systems, pressure compensating valves are normally used to maintain a predetermined pressure differential across the orifices in the directional control valve at a predetermined level. The predetermined pressure level acting across the dir... | 09/05/1995 |
| 5400694 | Hydraulic cylinder with internal safety valve An internal safety valve for preventing the discharge chute from rapidly falling due a sudden loss of hydraulic fluid pressure. A safety valve assembly for use in a hydraulic cylinder consisting of a safety valve located in the barrel of a hydraulic cylin... | 03/28/1995 |
| 5379679 | Acutator with series arranged control valves The present invention comprises a double acting actuator having a piston movable within a cylinder, a main poppet control valve connected to a fluid pressure source, and first and second poppet valves connected in series to a rod side chamber of the cylin... | 01/10/1995 |
| 5355773 | Hydraulic system for controlling contact pressure A hydraulic system for controlling the contract force of a hydraulic device. A proportional pressure relief valve acts as pilot valve for a main valve that controls the lowering process. The proportional pressure relief valve is provided with a solenoid w... | 10/18/1994 |
| 5331882 | Control valve system with float valve A pilot operated directional control valve communicates fluid between a hydraulic actuator, a pump and a reservoir. A lockout valve is connected between each main control valve work port and a corresponding cylinder port, and operates to reduce fluid leak... | 07/26/1994 |
| 5325763 | Internal check valve An internal check valve for use in a linear hydraulic motor in the form of a piston-cylinder unit including a cylinder body (38) reciprocally slidable on a piston component (40). The piston component (40) includes a tubular piston rod (52) and a piston he... | 07/05/1994 |
| 5313872 | End of stroke cushion for a linear hydraulic motor An end of stroke cushion for a linear hydraulic motor. A piston-cylinder unit includes a cylinder body (42) reciprocally slidable on a piston rod (40) having a piston head (64) which defines working chambers (82, 84) within the cylinder body (42). The pis... | 05/24/1994 |
| 5293914 | Hydraulic control circuit for a delimbing apparatus A hydraulic control circuit for uniform controlled movement of stripping and guiding arms in a tree delimbing apparatus. A pair of flow divider combiner valves allow equal amounts of pressurized fluid to communicate with and actuate said cylinders. The pi... | 03/15/1994 |
| 5291821 | Hydraulic circuit for swivel working machine A hydraulic circuit for a swivel working machine, in which the operation of the working unit is speeded up when the swiveling body and the working unit are simultaneously operated, includes, for this purpose, first and second operating valves (151 | 03/08/1994 |
| 5271227 | Hydraulic apparatus with pressure compensating valves In the hydraulic apparatus (1) according to a first aspect of the present invention, mid-pressures between the inlet side and outlet side pressures of a first and a second pressure compensating valves (4, 4') are permitted to act on the flow rate decreasi... | 12/21/1993 |
| 5220861 | Actuator with neutral position return The mechanism has an actuator provided with a piston, a servo control valve which is actuated by electric input and output signals for supplying working fluid to the actuator and exhausting working fluid from the actuator, a slider which closes an oil pas... | 06/22/1993 |
| 5216959 | Method and device for press overload protection A method and a device for protecting against a press overload is disclosed whereby, when an excessive pressure which exceeds a specified hydraulic pressure is transmitted to a pressure chamber of a press cylinder, this excessive pressure activates the pun... | 06/08/1993 |
