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6415703 |
Method for controlling the motion velocity of a hydraulically driven machine, a drive system for a hydraulically driven machine
The present invention concerns a method for controlling the speed of motion of a hydraulically operated machine, an operating system and a control device of the machine. The flow line ( 3 ) of the...
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6389950 |
Manually controlled lifting device with a pneumatic lift drive mechanism
A manually controlled lifting device is provided including a pneumatic lifting drive, a lifting member, a load carrying means, a pressure source, a pressure line, a flow control device, a pneumatic...
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6338466 |
Water well recharge throttle valve
A water well recharge throttle valve ( 1 ) is configured as a hydraulic actuated flow control device ( 5 ) that permits calibrated throttling of water used in Artificial Storage and Recovery (ASR),...
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6290474 |
Machine hydraulic system
A machine, in particular an industrial truck, is provided with a hydraulic system that has at least one reservoir (1) for hydraulic fluid and at least one hydraulic pump (5). The hydraulic pump (5)...
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6260467 |
Hydraulic circuit providing plural swing rates in an earthworking construction machine
A construction machine, e.g., a backhoe, has a chassis and a digging tool mounted for movement, e.g., swinging movement, with respect to such chassis. A machine hydraulic circuit includes a pump, a...
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6223645 |
Compressed air flow rate controller for paint sprayer system
A controller for controlling the flow rate of compressed air to a spray paint gun as well as to a comparable tool which is optimally operative dependant upon receiving a specified flow rate of air...
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6192781 |
Assembly for reversing a fluid driven motor
An assembly for reversing a fluid driven motor. The assembly includes a fluid driven motor, and a reversing valve that reverses inlet and exhaust porting to and from the fluid driven motor. An...
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6065386 |
Hydraulic device for controlling a hydraulic-fluid flow
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5996623 |
Hydraulic directional-control valve
A hydraulic directional-control valve comprises a first inlet part, a second inlet part, a tank port, a work part and a valve member which is movable from a neutral position to a operating...
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5992293 |
Cylinder device
The invention concerns a device in an piston cylinder aggregate including a valve element (8) which comprises a valve body (9) for choking the flow in a fluid channel (6) in co-operation with a...
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5960696 |
Hydraulic cylinder with press-fitted pipe
It is intended to dispense with the pipe welding work, thereby improve the pipe mounting performance and prevent contamination which results from welding, and elimination the waste of oil. A spigot...
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5893428 |
Hydraulic power steering
In a hydraulic power steering for a motor vehicle with a hydraulic servomotor and a servovalve arrangement in communication with opposite servomotor actuating chambers by way of separate...
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5832805 |
Method and apparatus for controlling speed of hydraulic cylinder
In order to improve speed controllability both in low and high speeds, thereby stabilizing the speed of a hydraulic cylinder, both the flow-in amount of hydraulic operating fluid flowing from a...
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5809862 |
Flotation control system
A flotation control system for controlling the boom of a tractor or brush cutting machine. Three hydraulic valves operate together and work in conjunction with the existing main valve of the...
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5791226 |
Fluid regeneration device for construction vehicles
A return fluid regeneration device for construction vehicles is provided. The regeneration device includes an orifice disposed on a return-side internal line of a directional control valve of an...
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5778930 |
Add-in device for a hydraulic control arrangement
An add-in device for a hydraulic control arrangement provides a function unit (24) to be arranged between successive modules, which function unit takes the connection between the pump channels of...
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5669280 |
Hydraulic control apparatus
A hydraulic control apparatus for a hydraulically operated vehicular transmission has control valves corresponding to hydraulic engaging elements provided in the transmission. The supply and...
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5644915 |
Control system for a hydraulic press brake
A control system for controlling the movement of the ram of a press or press brake of the type having one or two main cylinders with pistons operatively attach to the ram. The control system...
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5618022 |
Variable orifice valve
The Variable Orifice Valve is disclosed and the preferred embodiment of a hydraulically acruated - - flow control device that permits the calibrated throttling of water used in a Artificial Storage...
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5615991 |
Variable priority device for heavy construction equipment
A variable priority device for heavy construction equipment for establishing a priority of the boom over the bucket by limiting an amount of fluid passing through a bucket-side parallel fluid line...
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5325761 |
Switching arrangement for controlling the speed of hydraulic drives
A switching arrangement for controlling the speed of hydraulic drives, wherein a speed of the drive is assigned to a corresponding flow rate of a hydraulic medium. The flow rate is determined by a...
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5308215 |
Passenger lift movable at variable speeds
A hydraulic drive passenger lift with distinct lifting "up and down" (loading, unloading) and "fold-unfold" (storage) motion patterns, includes a flow control structure that accommodates various...
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5307728 |
Control arrangement for regulating the speed of a pressure cylinder
A control arrangement for regulating the speed of a pressure cylinder increases the controllable flow volume through a proportional-action (control) valve, while avoiding a larger valve or two...
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5287885 |
Hydraulic control system for weighing and two-way valve therefor
A motion control system for hydraulically operated lifting devices. The system provides for the dynamic weighing of a loaded container by controllably directing hydraulic flow through a bypass...
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5233910 |
Pressure holding valve
A pressure holding valve for pressure-fluid-actuated leveling systems in vehicles, having at least one seat valve with a valve opening, a valve seat and a valve member in which the valve member is...
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5195418 |
Hydraulic control system for weighting and two-way valve therefor
A motion control system for hydraulically operated lifting devices. The system provides for the dynamic weighing of a loaded container by controllably directing hydraulic flow through a bypass...
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5193433 |
Piston sealing and dampening device
Piston sealing and dampening device in a pressurized-fluid cylinder, where a piston (3) has a central recess (3a) facing towards a cylinder end cap (1a) and disposed such that when the piston is in...
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5174422 |
Transmission equipped with torque converter
A transmission equipped with torque converter having a forward/backward change valve for supplying working oil selectively to any one of a forward clutch or a backward clutch. A shock diverter...
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5165320 |
Fluid-controlled servo-arrangement
Disclosed is an arrangement that includes a piston cylinder unit having pressure chamber in which fluid acts in opposition to a spring piston combination, a pressure generator and a fluid conduit...
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5142963 |
Load referenced pressure reducing valve
A load-referenced, pressure reducing valve, and a system which incorporates one or more of such valves provide needed response to rapidly changing hydraulic system load demands which are...
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5133424 |
Variable assist power steering control valve
A variable assist power steering system for an automotive vehicle, the system having a source of hydraulic fluid (10), a power steering assembly (30) having a low speed inlet (32) and a high speed...
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5123509 |
Control valve for a hydraulic switch clutch
Hydraulic pressure representing engine throttle position is applied to a valve spool having two control surfaces. In opposition to the force of a control spring, a pressure line, which opens to the...
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5099748 |
Pneumatic system for telescopic hoist
A telescopic pneumatic hoist has a flexible stationary hollow probe on its base arranged to unseat a check ball in the piston of the lowest intermediate stage when the piston is near the base. When...
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RE33835 |
Hydraulic system for use with snow-ice removal vehicles
A hydraulic system is provided including a hydraulic pump which is continuously coupled with the engine of a utility such as a dump truck utilized for snow-ice removal. When hydraulic implements...
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5029513 |
Variable-orifice, servo-solenoid valve for a variable-assist power steering system
A power steering system for a wheeled vehicle comprising a fluid motor connected to dirigible wheels of the vehicle, a power steering pump and a steering valve structure situated in flow delivery...
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5024140 |
Hydraulic control mechanism for a hydraulic actuator
The invention is directed to a hydraulic control mechanism for a work vehicle. The work vehicle is provided with a work implement that is operated by a hydraulic actuator. The positioning of the...
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4947894 |
Flow amplifier in hydraulic steering system of a transport vehicle
A flow amplifier in the hydraulic steering system of a transport vehicle comprises a three-position hydraulically operated hydraulic directional control valve having a single sliding spool valve...
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4917001 |
Drive control valve for constant speed
The drive control valve for constant speed is for driving a pneumatic actuator at a constant speed by use of a meter-out control mode, and includes a nonreturn valve for blocking discharged air...
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4894988 |
Hydraulic system for operating switching or like devices
A hydraulic control system for actuating a switch or related device including an actuator assembly having a housing with a member movable therein and connected to the switch for movement therewith...
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4827830 |
Chassis towveyor cart
A towveyor cart for use in hoisting an object and in particular an object having first and second interconnected portions from a first level to a fully raised level. The towveyor cart has control...
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4821622 |
Extension and retraction sequencing circuit
An improved hydraulic circuit for automatically sequencing a pair of hydraulic cylinders through alternate extension and retraction cycles. A manually operated control valve initiates addition and...
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4794842 |
Valve means for connecting at least one consumer to a hydraulic pressure line
For connecting servohydraulic linear or rotation drives to a line with impressed pressure a valve means is provided which shuts off the pressure-carrying lines in leakage-free manner and connects...
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4787408 |
Fail safe valve for an air inleakage monitoring system in a steam turbine
A normally closed valve system for sealing off low pressure gas flow through a pipe. The valve comprises an inflatable bladder which blocks relatively low pressure flow through the pipe and permits...
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4783043 |
Hydraulic snub valve
A hydraulic snub valve is provided for use with a source of motive fluid and a device which is to be moved by the motive fluid. The snub valve comprises a piston member which is slidably disposed...
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4774807 |
Control apparatus for hydrostatic motor vehicle steering apparatus
The invention relates to hydrostatic steering control apparatus of the type having a hydrostatic steering motor which is connected to wheels to be steered and a steering wheel controlled metering...
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4759256 |
Tensioner recoil control apparatus
Apparatus for controlling fluid communication with a fluid pressure system includes parallel flow paths connected to the system. A first flow path includes first valve apparatus for selectively...
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4753075 |
Portless type master cylinder device with intake valve and flow resisting means between pressure chamber and reservoir chamber
In this portless type master cylinder device, a cylinder bore is formed in a body thereof, and a piston member is fitted in the cylinder bore and is slidably movable from an initial axial position...
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RE32588 |
Valve actuator system
A pneumatic-hydraulic proportional valve actuator system is provided having a relatively simple and adjustable means of achieving two stroking speeds by the hydraulic actuator, high speed in normal...
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4709618 |
Series self-leveling valve with single spool for unloading and relief
A self-leveling series type hydraulic system including boom and bucket valves which separately control boom and bucket cylinders and a flow divider valve positioned in the exhaust flow path of the...
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4679589 |
Fluid pressure controlling solenoid valve
A fluid pressure controlling solenoid valve is disclosed for producing an oil pressure which drives a brake pressure controlling piston in a manner such that an brake oil pressure applied to the...
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