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 |
| 7337869 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 03/04/2008 |
| 7281375 | System and method for electronic actuation of axle driving apparatus A system and method for electronically controlling the displacement of hydraulic pumps, transmissions or transaxles. A moveable swash plate is cooperable with a rotatable hydraulic pump for controlling the output thereof, and a rotatable trunnion arm is coupled to t... | 10/16/2007 |
| 7165398 | System and method for electronic actuation of axle driving apparatus A system and method for electronically controlling the displacement of hydraulic pumps, transmissions or transaxles. A moveable swash plate is cooperable with a rotatable hydraulic pump for controlling the output thereof, and a rotatable trunnion arm is coupled to t... | 01/23/2007 |
| 7093433 | Laying apparatus for cables, lines, conductors or suchlike, and relative laying method Laying apparatus and method for cables, lines, conductors or suchlike. The apparatus comprises at least a hydraulic circuit provided with a variable delivery feed pump and with a motor connected to the feed pump in order to drive laying members for the cables and su... | 08/22/2006 |
| 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 |
| 7037236 | Hydraulic transmission vehicle A hydraulic transmission (21) has an electric actuator (86) for changing its output/input rotation speed ratio. A controller 90 of the actuator memorizes a command current value to the actuator supposing that load is not applied on the hydraulic... | 05/02/2006 |
| 6955045 | Oil pump system Variable displacement pump pumps oil to one or the other ports of an oil operated vehicle wheel motor to drive a lawn mower. ... | 10/18/2005 |
| 5122037 | Manual displacement control A manual displacement control is provided for varying the displacement of a hydraulic pump. The pump has a tiltable swashplate and is used in a hydraulic system which includes a control valve having an axially movable spool for metering control fluid to m... | 06/16/1992 |
| 4990842 | Operation control method and device for construction machine An operation control device for a construction machine is constructed of a remote control valve having a member moveable in proportion to an operating lever stroke and having a plurality of devices engaged with the member and operable in association there... | 02/05/1991 |
| 4720974 | Servo-mechanism for use in a hydrostatic transmission A servo-mechanism includes a piston and cylinder unit controlled by a valve coupled in known manner by a linkage means to a movable control element to provide closed loop servo operation to position the piston and cylinder unit piston rod according to the... | 01/26/1988 |
| 4587808 | Control system for hydraulic circuit means A control system for a hydraulic circuit having a variable displacement hydraulic pump, and an actuator driven by the pump, in which a pump control controls a displacement volume varying member of the pump based on an operating signal giving a command wit... | 05/13/1986 |
| 4528813 | Control system for hydrostatic power transmission A control system for a hydrostatic power transmission having a variable displacement hydraulic pump (2) and a hydraulic actuator (3) connected in a closed or semi-closed circuit, wherein the displacement of the pump or the delivery thereby is adjustable i... | 07/16/1985 |
| 4527393 | Control device for a hydrostatic transmission A control device for a hydrostatic transmission including apparatus for sensing a speed of a prime mover which powers a variable displacement pump of the hydrostatic transmission and for regulating the displacement of the variable displacement pump in acc... | 07/09/1985 |
| 4518320 | Variable displacement pump system A variable displacement pump has a swashplate controlled by a pair of pistons. A shuttle valve communicates the highest pressure pump workport to an operator-controlled displacement control valve. A pressure-responsive override valve is connected in serie... | 05/21/1985 |
| 4518319 | Variable displacement pump system A variable displacement pump has a swashplate controlled by a pair of pistons. A shuttle valve communicates the highest pressure pump workport to an operator-controlled displacement control valve. A pressure-responsive override valve is connected in serie... | 05/21/1985 |
| 4489552 | Automatic neutral point detecting system for hydraulic pump An automatic neutral point detecting system for a hydraulic pump equipped with a displacement varying device capable of shifting both in a (+) direction and in a (-) direction and connected to at least one hydraulic actuator to form a hydraulic circuit to... | 12/25/1984 |
| 4489551 | Failure detection system for hydraulic pump A failure detection system for a hydraulic pump (1) having a displacement volume varying device (1a) and connected to at least one hydraulic actuator (4) to constitute a hydraulic circuit for driving the hydraulic actuator. The system includes means (7a, ... | 12/25/1984 |
| 4480438 | Power transmission A hydraulic system comprising a reversible variable displacement pump, a hydraulic servo motor for controlling the direction and amount of displacement of the pump, a fluid motor connected in parallel to the pump and adapted to be driven by the pump, a pi... | 11/06/1984 |
| 4478136 | Electrohydraulic control arrangement for hydrostatic machine An electrohydraulic control arrangement for a hydrostatic machine with displacing element having a stroke determined by a control member, which has at least one pressure-actuated regulating piston arranged to adjust the control member, and a valve slider ... | 10/23/1984 |
| 4461147 | Variable displacement hydraulic control with override In the preferred form, the invention disclosed herein provides a single servo control valve to modulate the flow of control fluid to a servo mechanism of a variable displacement pump wherein the single valve is provided with both a manual primary input an... | 07/24/1984 |
| 4456434 | Power transmission A variable displacement pump control system comprising a variable displacement pump having a movable element for controlling pump displacement, a hydraulic motor for moving the movable element, and a transducer for producing an electric signal correspondi... | 06/26/1984 |
| 4370856 | Control method for winch of mining machinery An arrangement is described for controlling a winch used in mining machinery, wherein the direction of operating a winch and speed thereof are controlled by changing the position of a control element of a fluid pump for supplying a fluid into a fluid pres... | 02/01/1983 |
| 4355506 | Pump-motor power limiter and pressure relief Pump-motor hydraulic power system incorporation means to limit the power transmitted and the pressure in the transmission lines. High pressure line is connected to one end of a servo motor comprising a cylinder with a spring loaded piston therein. When th... | 10/26/1982 |
| 4350091 | Crank press with hydraulic transmission In a crank press having a pedestal and a rotatable crank shaft journaled thereon and connected to a reciprocal top platen guidably mounted on the pedestal to form work pieces, the improvement which comprises a hydraulic motor mounted on the pedestal havin... | 09/21/1982 |
| 4080850 | Controls for combined hydrostatic and multiple speed range transmission units with automatic speed control and braking functions A drive train includes a hydrostatic transmission unit and a multiple speed range transmission unit arranged in series between a prime mover and a primary output shaft, variable displacement and torque transmitting capacity of the hydrostatic transmission... | 03/28/1978 |
