Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 8001776 | Hydraulic circuit arrangement with a device for limiting control and method for pressure control by controlling displacement The invention relates to a hydraulic circuit arrangement for setting the delivery volume of a pump, with an electrically activatable control-valve unit, by means of which, alternately, an active side of a servo system can be acted upon with pressure and, at the same... | 08/23/2011 |
| 7690196 | Hydraulic actuator having an auxiliary valve A hydraulic actuator for a hydraulic servomotor 4 is disclosed. The hydraulic servomotor 4 has a first chamber 5 and a second chamber 6 associated therewith. The hydraulic actuator is connected to a fluid source 2 and a fluid drain... | 04/06/2010 |
| 7513109 | Hydraulic controller for working machine There is provided a hydraulic controller for a working machine in which a pilot hydraulic pressure source is connected in common to a plurality of pilot-operated hydraulic devices each having a pilot pressure input unit, and a common pilot pressure input switching v... | 04/07/2009 |
| 7503173 | Control devices for swashplate type variable displacement piston pump Improvements in trunnion shaft-controlled swashplate axial hydraulic piston pumps as well as hydraulic systems used in hydrostatic transmissions utilized. e.g., in zero-turn-radius (ZTR) wheeled vehicles, such as grass mowers, with one embodiment thereof pertaining ... | 03/17/2009 |
| 7500361 | Hydraulic pump unit and working vehicle There is provided a hydraulic pump unit of variable displacement type disposed away from a pair of hydraulic motor units which are capable of being independently arranged, the pump unit fluidly-connected to the pair of hydraulic motor units so as to change the outpu... | 03/10/2009 |
| 7469536 | Series-parallel hydrostatic transmission According to the present invention, an improved hydraulic transmission system is provided which includes a fluid supply adapted to supply hydraulic working fluid and having a hydraulic adjustment device for adjusting the flow rate of the hydraulic working fluid. A h... | 12/30/2008 |
| 7437873 | Connection block for a hydrostatic piston machine The invention relates to a connection block for a hydrostatic piston machine which is provided for simultaneous operation in a first hydraulic circuit and a second hydraulic circuit. A first working pressure duct (60) and a second working pressure duct (61... | 10/21/2008 |
| 7353650 | Axle driving apparatus An axle driving apparatus comprising a common housing in which a hydraulic pump and a hydraulic motor fluidly connected with each other and an axle driven by the hydraulic motor are disposed, At least one of the hydraulic pump and the hydraulic motor is variable in ... | 04/08/2008 |
| 7347117 | Hydraulic linear drive of a transmission actuator A hydraulic linear drive for a hydraulic vehicle transmission actuator has a piston/cylinder unit in which an adjusting piston is arranged so it is longitudinally displaceable in a cylinder housing and subdivides the cylinder space into at least two pressure spaces ... | 03/25/2008 |
| 7316115 | Means and method for controlling a hydromechanical transmission in dual mode A system for operating a hydromechanical transmission having a movable input member that transmits a signal to a control unit that uses predefined logic to determine if a hydrostatic transmission should be in a first low speed mode that uses displacement control or ... | 01/08/2008 |
| 7299738 | Axial piston machine having a device for the electrically proportional adjustment of the volumetric displacement An axial piston machine having a swashplate or an oblique axis which can be adjusted by means of servopistons and has a valve segment and an adjustment unit for the electrically proportional adjustment of the volumetric displacement. The adjustment unit comprises pr... | 11/27/2007 |
| 7281373 | Fluid pump control device for wheel loaders A fluid pump control device for wheel loaders includes an engine for driving an axle through a transmission, a main pump, a variable-displacement steering pump with a pump regulator, an auxiliary pump, an electronic proportional control valve provided on a discharge... | 10/16/2007 |
| 7269946 | HST drive circuit The present invention makes it possible, in an HST drive circuit wherein an HST pump and an HST motor have been separately stored in a pump case and a motor case, to efficiently cool the HST drive circuit. A cooling line for, while discharging a relief oil from a ch... | 09/18/2007 |
| 7226038 | Load arrestor, lifting system and method A load arrestor for use in conjunction with a primary lift, the load arrestor comprising a spool about which winds a safety line attached to a load supported at least in part by the primary lift, a lock mechanism comprising a lock plate connected to and rotatable wi... | 06/05/2007 |
| 7213672 | Vehicle hydrostatic transmission circuit A hydrostatic transmission circuit for a vehicle having at least two displacement members (12) driven by at least one hydraulic motor (10) having a feed main duct and a discharge main duct (16, 18). Skid control means for controlling skidding of... | 05/08/2007 |
| 7171887 | Regulating device for hydrostatic piston machines The invention relates to a regulating device for hydrostatic piston machines consisting of an actuating piston (2) which can be removed between two end positions which can be impinged upon by actuating pressure exerted thereon in an opposite direction. An act... | 02/06/2007 |
| 7168245 | Work machine with supplemental power steering A steering system for a work machine having a hydrostatic transmission is disclosed. The steering system has a primary source of pressurized fluid and a steering control valve. The steering system also has a first fluid passageway fluidly connecting the primary sour... | 01/30/2007 |
| 7167157 | Input device for improving man-machine interface An input device for improving man-machine interface, for use in connection with a data processing system such as a computer, is disclosed. The input device provides a more direct and natural relationship between the control movements of an operator and the output fr... | 01/23/2007 |
| 7165396 | Pump control override for tandem pumps A tandem pump assembly of the type including a housing (H), disposed in which is a first pump (11), driven by an input shaft (19), and a second pump (33), also driven by the input shaft (19). The assembly is characterized by the tandem pu... | 01/23/2007 |
| 7121090 | Axle driving apparatus An axle driving apparatus comprising a common housing in which a hydraulic pump and a hydraulic motor fluidly connected with each other and an axle driven by the hydraulic motor are disposed, At least one of the hydraulic pump and the hydraulic motor is variable in ... | 10/17/2006 |
| 7121188 | Axial piston machine having a device for the electrically proportional adjustment of its volumetric displacement An axial piston machine having a swash plate or oblique axis which can be adjusted by means of servopistons and has a valve segment and an adjustment unit for the electrically proportional adjustment of the volumetric displacement, the adjustment unit comprising pro... | 10/17/2006 |
| 7086225 | Control valve supply for rotary hydraulic machine A variable capacity hydraulic machine has a rotating group located within a casing and a control housing secured to the casing to extend across and seal an opening in the casing. The control housing accommodates a control circuit and a pair of sensors to sense chang... | 08/08/2006 |
| 7017679 | Device for the continuous adjustment of unbalance of steerable vibration plates The invention relates to steerable vibration plates that are set vibrating by rotating unbalanced masses. By twisting the unbalanced masses relative to one another the resulting forces and their direction of action can be changed, thereby influencing the travel spee... | 03/28/2006 |
| 7007447 | Actuator device with a multi-chamber housing An actuator device self-contained within a housing and adapted to move an object. The actuator device includes a movable piston positioned in a cylinder portion of the housing. The cylinder portion defines a longitudinal axis, whereby the piston is movable along the... | 03/07/2006 |
| 6954150 | Hydraulic shovel concurrently used for crane operations It is a subject of the present invention to provide a hydraulic shovel concurrently used for crane operations in which an operator may immediately be ascertained of conditions during crane operations as well as dangerous conditions occurring on the implement or the ... | 10/11/2005 |
| 6725658 | Adjusting device of a swashplate piston engine An adjusting device (1) for adjusting the swash plate (12) of an axial piston engine (1) with a swash-plate construction has an actuating piston (18) which acts on the swash plate (12) of the axial piston engine (1); and a c... | 04/27/2004 |
| 6694729 | Pump A pump unit having a pump cylinder block mounted in a housing on an end cap. The cylinder block is driven by a pump input shaft, where the input shaft has a first driven end and a second end, and the second end extends through the end cap and out of the h... | 02/24/2004 |
| 6684634 | Swash plate angle control mechanism of hydraulic continuously variable transmission In a configuration comprising a hydraulic servo mechanism (6) having a spool (72) as a hydraulic valve for controlling the swash plate angle disposed within a body housing (3) of a hydraulic continuously variable transmission (1 or 2), and a manual operat... | 02/03/2004 |
| 6666023 | Fluid pressure transmitting apparatus A fluid-pressure transmitting apparatus that is capable of securing the operationality of a working machine and braking and preventing against engine stall. The apparatus can switch between a working-machine operating device and a traveling operating devi... | 12/23/2003 |
| 6619038 | Axle driving apparatus An axle driving apparatus comprising a common housing in which a hydraulic pump and a hydraulic motor fluidly connected with each other and an axle driven by the hydraulic motor are disposed. At least one of the hydraulic pump and the hydraulic motor is v... | 09/16/2003 |
| 6606858 | Neutral override for servo controlled hydrostatic units The neutral override circuit of this invention includes a variable displacement pump controlled by a servo fluidly connected to a displacement control that is biased to a neutral position. A charge pump is connected to the pump and the displacement contro... | 08/19/2003 |
| 6460655 | Vehicle hydraulic system A hydraulic system is provided for a vehicle having front, middle and rear portions. The hydraulic system includes a main pump located in the front portion, and a secondary pump located in the front portion which supplies fluid to an inlet of the main pum... | 10/08/2002 |
| 6427441 | Hydrostatic vehicle drive with control device and control device for hydrostatic drives A hydrostatic vehicle drive has a control (5) for controlling an output torque of the drive and another control device (5) for controlling the output torque of a hydrostatic drive, the control device (5) having a controllable pressure-limiting valve (6) b... | 08/06/2002 |
| 6405530 | Non-feedback proportional electronic control for a variable displacement pump A hydraulic circuit includes a pump controlled by a two-stage non-feedback proportional control assembly. The first stage of the control assembly includes a single non-feedback proportional control valve that generates a displacement magnitude hydraulic s... | 06/18/2002 |
| 6374605 | Hydrostatic transmission control with pressure feedback A control arrangement is provided to control the output of a hydrostatic transmission in response to a selectable input from an operator. This is accomplished by having a adjustable relief valve connected to the pilot control arrangement that controls the... | 04/23/2002 |
| 6336324 | Slewing gear control system with braking and control valves A control circuit, in particular for a slewing gear of a digger, has a hydraulic fluid tank (21), connected to two adjusting pressure chambers (10, 11). Each of the connections contains a separate brake valve (19, 20). The first of the valves (19) is oper... | 01/08/2002 |
| 6282890 | Hydraulic circuit for construction machines The invention provides a hydraulic circuit for construction machines, capable of obtaining a satisfactory suspending capability during load suspending work, and having an improved operation efficiency with a decrease in the working speed of a load suspend... | 09/04/2001 |
| 6216456 | Load sensing hydraulic control system for variable displacement pump A load sensing hydraulic control system for use in a work machine and adaptable for controlling the displacement of a variable displacement hydraulic pump. The control system includes a signal duplicating valve connected in fluid communication with both t... | 04/17/2001 |
| 6176085 | Hydraulic drive system A hydraulic drive system includes a variable displacement pump unit having a rotor rotatably supported within a housing on a main rotor axis, and an input shaft coupled to the rotor by mating bevel reduction gears. A main pump includes a plurality of main... | 01/23/2001 |
| 6167702 | Rotary mechanism control with power supply The invention relates to a hydraulic controller, in particular for the control of the rotating mechanism of an excavator. In a hydraulic drive circuit a drive hydraulic pump (2) and a drive hydraulic motor are provided, which are connected via working lin... | 01/02/2001 |
