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7194990 |
Electro-hydraulic engine valve actuation
Hydraulic actuator as an element of a system for controlling an engine valve is presented. The actuator includes a fluidic actuation chamber, defined by an actuation piston that increases chamber...
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7146901 |
Hydraulic system
A piston space ( 7 ) of the consumer ( 10 ) has two delivery lines ( 6, 8 ), such that when the consumer ( 10, 12, 13, 14 ) is not actuated, pressure medium flows continuously via the second...
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6272852 |
High speed actuators and vibrators based on electro-rheological fluids
A pressure-operated linear actuator in which the working liquid is Electro-Rheological (ER) fluid in which there is a single flow path between an inlet and an outlet of an associated pump in which...
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6138789 |
Hydraulic rack and pinion steering
To improve a rack and pinion steering of the generic type to reduce noise development upon opening of the pressure-relief bore as well as in steady-state operation, the invention proposes that at...
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5839887 |
Internal-combustion engine having a specific-purpose pressure storage tank
The present invention relates to an internal-combustion engine having at least one piston sliding in a cylinder, at least one combustion chamber (4) and a compressed air or gas storage tank (14)...
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5377578 |
Torque control system
An air tool torque control system includes a controller operative to independently control two air tools with continuous programmed adjustment of the torque shut off point for each tool after each...
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5237905 |
Device for limiting a working stroke of a hydraulic cylinder
A device for limiting a working stroke of a hydraulic cylinder has a working cylinder and a working piston comprising a hollow piston rod connected to its top portion. A pressure reservoir is...
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5209063 |
Hydraulic circuit utilizing a compensator pressure selecting value
A hydraulic circuit arranged to prevent the load pressure in one of the hydraulic actuators at the time of starting from becoming abnormally high thereby preventing fluid under pressure from being...
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5081902 |
Apparatus for providing relief to a working chamber
For the relief of a highly pressurized hydraulic liquid in a working chamber of pilot controlled 2/2 poppet valve is used. The working chamber is further connected to a pressure relief valve, the...
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5072648 |
Control system for a fluid operated jack
A control system for a fluid operated jack reduces the speed of retraction of a piston rod of the jack to an acceptable rate during a preselected range of operation by adding pressurized fluid flow...
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4903940 |
Device for positioning an adjusting member
Device for positioning an adjusting member which includes a pneumatic adjusting cylinder and an electromagnetically actuated valve operating in a low-wattage range for controlling aeration and...
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4862972 |
Single-blow pneumatic percussive tool
A single-blow pneumatic percussive tool includes a hollow cylindrical casing (1) having inlet and outlet ports (2, 3). A hammer piston (4) mounted in the casing (1) divides the interior space of...
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4825745 |
Electrohydraulic control system
An electrohydraulic control system for a hydraulic working cylinder, for example of a press, the piston of which has a main working surface and a smaller working surface on the rod side. A...
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4811649 |
Hydraulic control apparatus
In hydraulic control devices comprising a two-way flow regulator in a resoir return passage, in which the flow regulator comprises a metering restriction and a pressure equalizer including a...
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4794843 |
Hydraulic valve for controlling single-acting cylinder
A hydraulic control valve for a single-acting cylinder includes a valve housing having a cylindrical valve bore. A supply port present in the valve housing is in communication with the valve bore,...
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4727791 |
Apparatus for controlling a hydraulic single acting cylinder
An apparatus for controlling a hydraulic single acting cylinder has first and second solenoid operated valves disposed in a supply line through which a working fluid is supplied to a working...
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4692574 |
Differential pressure responsive switch
A differential pressure responsive switch utilizes an operating diaphragm which has a position controlled by a pressure being monitored with the diaphragm acting through a transmission member upon...
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4561344 |
Electro-fluidic control device
A device of this nature incorporates at least one control piston displaceable within a casing, the casing having at least one venting nozzle authorizing the insertion of the piston into one of its...
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4557181 |
Brake cylinder/air reservoir device
A combined brake cylinder/air reservoir device in which a relatively small, tubular-shaped piston in a positioning chamber is connected to a larger power piston having an application chamber on one...
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4497376 |
Interchangeable ram diesel pile
A diesel-engine pile driving hammer provided with interchangeable rams for use in a single, outer, cylindrical casing. A large diameter hole or orifice is provided in the casing between a pair of...
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4362084 |
Hydraulic actuator controls
The flow of fluid to a hydraulic load (18) is controlled by controlling a bleed-off path (31, 32) by means of a main valve (20) responsively to the difference between a first input force produced...
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4361073 |
Sub-critical time modulated control mechanism
Fluid operated time modulated position control mechanisms are operated with a sub-critical carrier frequency. The carrier frequency is selected to be within a band lying between the minimum...
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4359929 |
Negative rate compensated hydraulic servo system
A flapper valve having a negative rate characteristic is variably opened by an external force and controls fluid pressure to a piston which moves, in response to this pressure, in order to return...
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4343224 |
Automatic control system
In the case of a pressure-worked automatic control system with a closed loop, and, more specially, a position automatic control system, the position of a servo-element is dependent on a spring...
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4280395 |
Hydraulic brake booster
The booster is installed downstream of a vehicle's power steering gear. The booster has a power piston and a valve seat piston reciprocably mounted in a bore of the booster housing. Hydraulic inlet...
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4278009 |
Hydraulic brake booster
The booster is installed downstream of a vehicle's power steering gear. The booster has a power piston and a valve seat piston assembly reciprocably mounted in a bore of the booster housing. The...
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4250360 |
Device to automatically activate or deactivate control means
A device designed to effect automatic activation or deactivation of electrically, hydraulically or pneumatically operated control means, comprising a body freely movable in an air-tight housing and...
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4218955 |
Pressure actuated shifting mechanism
An apparatus for delivering power to a marine propulsion device comprises an engine, a propeller, and a transmission which operatively connects the engine with the propeller and which is operative...
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4217471 |
Fluidic actuator for a switching device
A fluidic actuator includes a retainer block having an internal regulating passage and air inlet and outlet passages interiorly connected to the regulating passage. Obstruction means, preferably a...
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4204456 |
Pneumatic ejector for bomb
A pneumatic ejector device suitable for use in an aerial bomb ejection system, in which pivotably operable jaws for gripping the bomb or other device are operatively interconnected to a...
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4203349 |
Brake booster
A brake booster includes a housing with an inner wall defining a pair of pressure chambers. A passage in the inner wall communicates the pressure chambers with each other and an input member is...
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4187708 |
Pulling apparatus and method
A hand-tool housing a pneumatic and a hydraulic piston joined together with a common piston rod, and separated into an air chamber and a hydraulic chamber by a stationary divider through which the...
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4178894 |
Nonpolluting liquid fuel system for engines
Inside the fuel tank of a small engine liquid fuel system is a buffer chamber that has its interior communicated with the rest of the tank interior only through a small upper air vent and a...
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4142612 |
Servo motor with differential pressure controlled and actuated release valve
A vacuum operated road speed control system release valve with vacuum in the release chamber exerting a closing force on the valve. When the release circuit is opened to atmosphere by brake...
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4121512 |
Fluid system for compacting and squeezing apparatus
A water cylinder compacting and squeezing apparatus has a control valve requiring a connection of only one tube to the water cylinder for driving and retracting the piston in the cylinder. A water...
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4048866 |
Apparatus for use in controlling the tension of a chain or chains of mining equipment
Chain-tension control apparatus for use with mine installations utilizes a hydraulic multi-piston engine motor driving a reduction gearing which can be selectively coupled to a drive system for a...
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4044651 |
Pneumatic function generator assembly
A function generator is provided which establishes an output signal according to a functional relationship determined by the preformed contour of an easily precut cam member. The function generator...
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4033232 |
Charge forming device
A carburetor has a vacuum operated diaphragm type choke control device that acts in connection with a thermostatic control to permit the carburetor choke valve to be closed during starting but...
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4033525 |
Feedback PDM encoder and method for actuating a pneumatic actuator with a digital autopilot
A feedback PDM encoder and method is presented which permits utilization of neumatic pulse duration modulation (PDM) actuators with potentiometer position pickoffs in a digital autopilot loop. The...
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4009640 |
Anti-lock brake system
An anti-lock brake system includes a center hydraulically boosted master cylinder for hydraulically actuation of wheel master cylinder associated with a wheel brake, a center brake control valve...
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3994434 |
Variable volume air damper control having a damped actuator
A control for a damper providing a variable volume air flow through a duct in response to a sensed condition has means for damping oscillations of the damper.
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3992978 |
Fluid motor and fluid control means therefore
A pressure balanced hydrostatic slip bearing as shown for use in guiding and restraining a test table which is shaken in longitudinal direction to vibrate or shake test objects, and also which may...
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3967636 |
Valve for force-reversing modulator
A control valve for use with a force-reversing modulator in a vehicle adaptive braking system is disclosed. The valve includes a housing divided into a first section connected to one side of the...
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3949783 |
Dual Pump draft control valve
A draft control valve for use with two constant displacement pumps in an open center hydraulic system. The valve controls the implement position in response to the draft loads and manual control...
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3945206 |
Control system for hydraulic presses comprising a plurality of press rams
A control system for hydraulic presses comprising a plurality of press rams, an intensifier having a primary chamber which is connected by a supply conduit to a pump, and a valve which is...
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3938554 |
Cryogenic controller device
A device providing gas-powered logic responsive to a sensor such as a gas discharging type level probe and actuating valving controlling flow of liquid to be dispensed; and adapted to valving...
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3915062 |
Servomechanism or relay using fluid pressure
A servomechanism or relay of the pneumatic type using an expansible and contractible chamber made of flexible, more or less non-elastic material, an ejector-type nozzle, a force beam and a spring...
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3902402 |
Electro-hydraulic actuator
An actuator comprising a body having a bore, a piston in said bore and having a piston rod. A system pressure gallery or passage is arranged in the body for the application of system pressure to...
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3833200 |
DOUBLE ACTING SNAP ACTION FLUIDIC SWITCH
A two position fluid pressure responsive piston has a first effective area exposed to a reference fluid pressure, a larger second effective area exposed to a control fluid pressure, and an...
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3823621 |
VEHICLE AUTOMATIC TRANSMISSION CONTROL SYSTEM
A control system for an automatic transmission for an automotive vehicle comprising a combination of a hydraulic control section and an electrical control section. The hydraulic control section...
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