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The Quarterly Review ; March edition, 1825
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| Number | Title | Issue Date |
| 6539710 | Hydrostatic steering system having improved steering sensing A hydrostatic steering system of the type including a fluid controller (21) for controlling the flow of fluid from a source (11) to a steering actuator (19) in response to movement of a steering wheel (W). The controller (21) is of the type having a fluid... | 04/01/2003 |
| 5249420 | Control valve for bootstrap hydraulic systems The present invention is directed to a hydro-mechanical or electro-hydro-mechanical control system utilized for positioning a mechanical device. The control system incorporates an improved closed-center control valve for selectively controlling the differ... | 10/05/1993 |
| 4680929 | Swivelling working vehicle A working vehicle having a working device mounted on a swivel base rotated by a hydraulic motor. There is provided a control system which causes the swivel base to start and stop smoothly at highest possible standard speeds which are preset for an entire ... | 07/21/1987 |
| 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 |
| 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 |
| 4194361 | Electro-mechanical control system for hydraulic displacement pumps, such as swash plate or eccenter pumps To permit mechanical override of an electrical command system to control deflection of the swash plate or eccentricity of an axial or radial piston pump, for example upon failure of the electrical control system, a group of valves 5-8 are connected to an ... | 03/25/1980 |
| 4088087 | Remote control apparatus marine vessels having dual propeller shafts Fluid pressure operable remote control apparatus for a marine vessel equipped with a dual shaft and propeller propulsion system and fluid pressure operable operator controllers for coordinating operation respective valve devices and servo-positioners, whe... | 05/09/1978 |
| 4087967 | Sleeve spool valve A valve having a body with two ports and a bore, a sleeve selectively movable within said bore and having two radially extending passages adapted for sequential communication with one of said ports upon movement of said sleeve, and a spool selectively mov... | 05/09/1978 |
