Matches 1 - 50 out of 83 1 2 >
Match Document Document Title
7444922 Fastening assembly, fastener, and fluid pressure cylinder unit  
Each of two members to be fastened has a connecting surface, a communication groove opening on the connecting surface, and an engagement groove communicating with the communication groove and...
7434392 Configurable hydraulic system for agricultural tractor and implement combination  
When different implements are attached to an agricultural tractor, various hydraulic actuators on the implement are operated by connection to the hydraulic system on the tractor. A single hydraulic...
7428861 Valve for hydraulic props of shield-type support frames, and shield-type support frame  
The invention relates to a valve 120 , especially a check valve, for hydraulic plungers ( 3 ) of shield-type support frames in underground mining with a valve housing 121 and a switchable valve...
7383681 Method and apparatus for coordinated linkage motion  
A hydraulic system is provided. The hydraulic system includes a source of pressurized fluid, a first control valve, a first actuator, a second control valve, a second actuator, and a relief. The...
7290509 Variable valve actuator  
Improved actuators and valve control systems, and methods for controlling actuators and/or engine valves, are disclosed. In addition to the inherent capability of timing control, the ability to...
7284468 Blade holder having displacement-dependent spring force compensation  
A blade holder for cutting machines includes a blade head held on a raising and lowering device and an adjustment mechanism for a circular blade that is held on the blade head. The adjustment...
7044705 Load handling machine  
A load handling machine includes a body, a lifting arm pivotally mounted to the body about a first pivot axis, and a load handling implement pivotally mounted to the lifting arm about a second...
6968688 Two-cycle hot-gas engine  
A two-cycle hot-gas engine comprising an expansion piston in a heatable cylinder member and a compression piston in a coolable cylinder member. The expansion piston and the compression piston are...
6817067 Tandem electrohydrostatic actuator  
A tandem electrohydrostatic actuator ( 70 ) broadly includes a first piston ( 22 ) operatively arranged in a first cylinder ( 23 ), and a second piston ( 24 ) operatively arranged in a second...
6739130 Linear actuator  
The linear actuator comprises two variable-volume chambers ( 5 ) containing an operative liquid, each of the chambers ( 5 ) being delimited on one side by one of two mobile elements ( 4 ), which...
6386508 Actuator having dual piston surfaces  
A pressurized-fluid-operated actuator has two piston surfaces for providing increased output force. The actuator includes a hollow piston that is divided into two inner chambers by a stationary...
6253549 Toroidal hydraulic actuator  
A hydraulic actuator comprised of a toroidal piston within a toroidal enclosure, with differential fluid pressure alternatively applied to upper and lower surfaces of the piston to cause a...
5653155 Method and apparatus for single lever control of multiple actuators  
A method and apparatus for providing control of multiple actuators with a single control lever is provided. The method and apparatus is adapted for use in an electro-hydraulic system having a...
5636713 Multiple RAM assembly and recuperative drive system for hydraulic lift  
A multi-stage hydraulic ram assembly for the accumulator drive system of an elevator assembly includes a plurality of piston-cylinder arrangements connected hydraulically in parallel and...
5595148 Hydraulic valve control device  
The invention relates to a freely activatable hydraulic valve control device for a stroke valve, which valve control device is arranged particularly in an internal-combustion engine. The stroke...
5579677 Actuator operating signal sensor  
A device for sensing actuator operating signal in a hydraulic system is disclosed. The device has auxiliary valves directly coupled to the directional control valves respectively, the internal...
5542339 Tube clamp for bundling a set of tubes for shipment and for mounting them to a loader boom  
A tube clamp includes a cylindrical resilient plastic body containing an axial mounting hole and having four tube receptacles arranged with a first pair on one side of the axis and with a second...
5469946 Clutch actuation system  
The clutch actuation system provides for control of the clutch of a manual transmission in a motor vehicle. By use of hydraulics, a vacuum booster and a gradual pressure relief valve a smooth easy...
5387089 Method and apparatus for compressing gases with a liquid system  
Method and apparatus for compressing gas. Two accumulators are alternately filled with gas from a gas-supplying conduit, and the gas is forced out of one end of the accumulators into a...
5323687 Hydraulic circuit  
A hydraulic circuit for a backhoe loader having two double-acting cylinders for the arm and bucket of the loader and respective directional valves for the cylinders. There are heavy demands on the...
5308219 Process for automatically controlling actuators of excavator  
An automatic actuating system for actuators of excavator. The system of this invention automatically controls the bucket which is overloaded to be free from the overloaded state thereof, the bucket...
5241819 Tappet valve assembly for automatic railway vehicle couplers  
A tappet valve arrangement for a railway car coupler having a main valve for supplying air pressure from one railway car to another coupled railway car. A piston and cylinder valve for supplying...
5235898 Actuator with wear compensating chamber  
An actuator for a friction clutch having a diaphragm includes coupling means comprising a first part associated with the clutch actuating linkage, and a second part associated with the actuator...
5233911 Tandem brake booster  
A method of manufacturing a tandem brake booster wherein a rearwall is derived from the separation plate of a single brake booster. The separation plate is modified by creating a passageway...
5222426 Proportional distributor and control system for a plurality of hydraulic receivers incorporating a distributor of this kind for each receiver  
A proportional distributor embodying a controlled slide valve and a pressure compensator slide valve associated with additional positioning means whereby the pressure drop in the controlled slide...
5101629 Hydraulic circuit system for working machine  
A hydraulic circuit system comprising a hydraulic-fluid supply source, at least one hydraulic actuator operated by hydraulic fluid from the hydraulic-fluid supply source, a flow control valve for...
5028199 Apparatus for controlling speed of working machine in the form of a construction machine  
The present invention is concerned with a working machine in the form of a construction machine including booms 2 and a bucket 4 such as a wheel loader, a shovel loader or the like. When a scooping...
4969349 Synchronized dual axis actuator  
A dual axis actuator consisting of two fluid cylinders having the fluid inputs to the cylinders connected in parallel to a source of pressurized fluid, resulting in an automatic sequencing of...
4966246 Four wheel steering system  
A closed hydraulic system (22) is provided for transmitting steering movement to a rear wheel steering assembly (16) in response to steering movement of a front wheel steering assembly (14). The...
4850737 Hydraulic spring vehicle barricade and hydraulic circuit therefor  
A vehicle barricade comprises a frame to which a barrier plate is pivotally mounted for being moved between a passage and a blocking position. First and second hydraulic motors operably...
4708581 Method of positioning a transfer arm  
A drilling apparatus of the type having a drilling mast and a transfer arm mounted at a first axis adjacent the mast to move between a lower position near ground level and an upper position aligned...
4647267 Fork and arm mechanism for refuse container  
Arm and fork mechanism for moving a refuse retainer with respect to a refuse container which has an opening in the upper portion thereof. Arms are pivotally mounted adjacent the refuse container....
4567811 Telescopic cylinder  
A fluid operated cylinder device particularly adapted to lift a load relative to a load support includes a hollow casing having a closed end for attachment to the load support; an elongated rigid...
4489624 Triaxial hinge for robots, handling apparatus and the like  
A triaxial hinge for robots, mechanical handling apparatus and the like comprising three different kinematic elements, namely, a first, a second and a third element, of which the first element on...
4215622 Hydraulic control system  
A hydraulic control circuit especially for use with multi-function hydraulic devices, such as for industrial lift truck attachments, in which a combination of valve means are adapted to operate two...
4214445 Hydraulic circuitry for raise drill apparatus  
A hydraulic system for a drilling apparatus where torque is transmitted to drill pipe, a plurality of thrust cylinders move the torque transmitter back and forth along the drill pipe axis, and a...
4207805 Feed beam  
A feed beam for a rock drill comprises a box girder (13), a saddle (10) slidable along the box girder, and two power units (20,20a) inserted into the ends of the box girder. Each power unit...
4182585 Double-plate control device  
A control device serves to control the fluid flow to and from double-acting rams, especially the rams of mining machinery, the control device having various internal ducts which are defined between...
4169404 Fluid pressure actuator  
A fluid pressure actuator having a first member, a second member adapted to rotate relative to the first member, and a third member adapted to move on the second member. One of the first member and...
4158326 Control device  
A control device for controlling hydraulically actuated equipment, the device comprising a fluid distributing block and a plurality of control valve units detachably mounted side-by-side on the...
4149565 Pilot controlled poppet valve assembly  
A valve assembly is provided in which a first poppet member and at least one subsequent poppet member each having a valve face engageable with a valve seat between first and second passages. A...
4145957 Pilot-operated valve structure  
A pilot-operated valve structure for controlling high pressure fluid flow relative to a pair of cylinders, each having an extend port and a retract port. The valve structure has a pair of...
4128112 Spool valve for hydraulic brake booster  
A hydraulic brake booster includes a spool valve within a housing for communicating fluid pressure into a chamber for urging a piston in a direction actuating a master cylinder, thereby effecting a...
4128380 Fluid pressure actuated drive for the closing unit of an injection moulding machine  
A fluid pressure actuated drive for providing for the closing unit of an injection moulding machine a to and fro traversing motion of a movable part of the unit with little force and a clamping of...
4128047 Actuator with locking valves  
A hydraulic actuator having two balanced area actuator pistons, each controlled by the movement of a primary servo sleeve to supply pressurized fluid from a pressure fluid source to one side of the...
4126082 Travel-brake control system  
A hydraulic control system for use with a vehicle having an earthworking implement and having a plurality of components operated by hydraulic motor means having hydraulic release type brakes...
4124038 Multiway hydraulic valve  
A multiway hydraulic valve comprising a valve housing having a cylindrical bore, a first and second inlet, an outlet, a first series and second series of operation ports all defined in the valve...
4124131 Arrangement for sliding the load carrier of a long trailer to and fro  
A mechanism for moving a slidable load carrier to and fro along a trailer includes a hydraulic double-acting servomotor having a piston rod which selectively engages with one or other of two sets...
4122759 Jam-proof actuator structure  
An actuator, and a system employing the same, which will continue to operate after deformation of a portion thereof which deformation would normally restrict movement between the piston and...
4080870 Multiple position fluid conductor apparatus  
Total apparatus includes extensible and retractable means for moving a load linearly between two or more spaced positions, the load having a fluid pressure operated motor, and means for delivering...
Matches 1 - 50 out of 83 1 2 >