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8899143 Hydraulic control system having variable pressure relief  
A hydraulic control system is disclosed. The hydraulic control system may have a pump configured to pressurize a fluid, an actuator, a position sensor associated with the actuator and configured to...
8356546 Holding control valve  
A holding control valve of the present invention is configured such that: a spool is configured to perform strokes by a piston configured to operate by introduction of pilot pressure and have a...
7562616 Device for the emergency lowering of a load-carrying means for a stacker truck  
Device for the emergency lowering of a load carrying means for a stacker truck, in particular a reach-type forklift truck, with a valve arrangement accommodated in a valve block, via which the...
7516614 Hydraulic arrangement  
An improved hydraulic arrangement is provided for a spring support system. The arrangement comprises a hydraulic cylinder, a hydraulic reservoir, a hydraulic fluid feeder, a hydraulic accumulator,...
7441407 Hydraulic drive control device  
A hydraulic drive control device which is capable of translating the effect of oil pressure loss reduction into the effect of fuel consumption reduction that is very real to the user. The hydraulic...
7156013 Hydraulic cylinder comprising valves  
An energy cylinder for operating a valve of a turbine, in particular of a steam turbine, is disclosed, wherein a cylinder housing and a control block are combined into a common block. The latter...
6789589 Bulk handling device operating coupling  
A controller for controlling the operation of gripping devices of a loader harvester bulk handling device. In the controller, the coupling of a valve with the operating device of the loader...
6253658 Hydraulic control system  
The invention provides a hydraulic control system capable of preventing an objective from crashing even if a load supporting passage is fractured or the like during a crane operation for moving...
6220288 Electrohydraulic control device  
An electro-hydraulic control device (10, 60) for a hydraulic servo motor for controlling a volume flow is proposed, which is embodied as a 4/2 valve module. A blocking valve in accordance with seat...
6068013 Counter balance valve  
In a counter balance valve, a valve body is provided with a valve bore having first and second pump-side ports, first and second motor-side ports and an auxiliary port. A spool is slidably fitted...
6050172 Pneumatically operated mechanism  
A pneumatically operated mechanism for a glass machine comprises a piston and cylinder device, first and second air lines leading to opposite sides of the piston, and first and second control means...
6035909 Hydraulic drive for a feller-buncher  
An apparatus for felling and bunching trees is disclosed. The apparatus includes a front frame and a front axle supported by the front frame. The apparatus further includes a number of front wheels...
5950519 Hydraulic system with secondary exhaust passage  
A hydraulic system for working cylinders of construction equipment is disclosed. The system allows oil to be smoothly drained from a chamber of a working cylinder into an oil tank through a first...
5907991 Quick drop valve control  
The present quick drop valve control provides both quick drop and float functions by moving a quick drop valve to a position interconnecting the drop and lift sides of a pair of lift cylinders when...
5857401 Pneumatic mechanism  
A pneumatic circuit for use in causing rapid, upward movement of a piston and cylinder device in a glass machine incorporates a supplementary valve which connects an upper part of the cylinder to...
5833209 Device and method for influencing the periodic stroke movement of the closing element of a valve  
To influence the periodic stroke movement of the closing element of a valve, a control cylinder working on the closing element in the stroke direction is provided, which can be acted upon or...
5794736 Fluid control system for a vehicle power assisted steering mechanism  
A fluid control system (10) for a vehicle power steering mechanism having a manually driven steering member and a fluid driven driving member (16) operatively connected to steering means of the...
5701933 Hydraulic control system having a bypass valve  
A hydraulic control system has a closed center control valve disposed to control flow of pressurized fluid from a pump to an actuator and a bypass valve disposed to control fluid flow through a...
5615595 Tandem cylinder control  
Tandem arranged cylinders having a common wall therebetween, with a common piston rod extending through said common wall, said rod carrying a piston for reciprocation within each said cylinder, and...
5542864 Steering cylinder for outboard engines  
The disclosure involves a hydraulic cylinder having an elongate interior chamber, a piston movable in the chamber, and a first fluid passage generally parallel to the chamber. In the improvement,...
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...
5076140 Method and system for hydraulically positioning and impact load cushioning of a workpiece  
A hydraulic positioning means is provided which includes means for selectively allowing or prohibiting the flow of the first hydraulic fluid under the operating pressure. It also includes means in...
5076144 Poppet valve device  
A poppet valve device according to the present invention is adapted to sequentially operate a plurality of poppet valves the switching operation of a pilot valve, for example, an electromagnetic...
5036933 Supplementary rear-wheel steering for motor vehicles  
In normal operation, a control or regulating device controls vehicle rear wheel steering in accordance with freely-selectable specifications. If a malfunction of the control or regulating device is...
4753269 Hydraulic latching apparatus for a control system  
A system for hydraulically detecting the seizure of a control valve in a hydraulic servo valve system wherein a hydraulic signal generated responsive to the control valve seizure is utilized to...
4741249 Automatic economizing device for compressed air  
Automatic device for economizing compressed air comprises a means for ensuring the passage of driving fluid under pressure during most of the stroke of the moving element of a user apparatus. The...
4690035 Emergency draining device for stopping pneumatic cylinders  
An emergency drain device for pneumatic cylinders which is integrated in an orientatable connection fixed directly to the cylinder body and comprises a valve which closes an orifice of the bolt of...
4672885 Servo device for controlling flow in a hydraulic installation, particularly for the assisted steering of a vehicle  
The servo device for controlling flow (10) situated in a branch hydraulic line (6), incorporates in a body (11) an inlet passage (12) and an outlet passage (9) connected by an intermediate passage...
4644657 Speed-controlled apparatus for cutting and taking out blocks from a silo fodder bin  
Apparatus for cutting out blocks from a silo fodder bin has an hydraulically-driven, blade-carrying travelling gear travelling to and fro across a bridge and a conduit between hydraulic feed and...
4640095 Digital electro-hydraulic valve arrangement  
Electro-hydraulic valve arrangements are useful in controlling a displacement control member of a variable displacement pump or motor. However, previous digital electro-hydraulic valves having...
4633757 Brake booster  
A brake booster can switch operating mode from a positive-pressure mode using a signal-controlled fluid pressure supplier to a vacuum-pressure mode and vice versa. The booster includes a booster...
4632158 Power limiting hydraulic system  
The hydraulic system of this invention is for operating a tree processing implement on a work vehicle so that during a first part of an operating cycle the implement is supplied by two hydraulic...
4625625 Vehicle hydraulic systems  
In a vehicle hydraulic system of the open center kind, hydraulic fluid for operating vehicle services is circulated continuously, normally by an engine-driven pump. A closed center booster which...
4581978 Control system for pressure operated actuator  
A control system for a fluid pressure operated actuator includes an arming valve having open and closed positions and a pilot operated selector valve having a neutral position and an extend...
4579038 Depth control valve and system for agricultural implements  
Disclosed is a representative agricultural implement towed by a tractor equipped by a hydraulic power source connected to a lift mechanism for raising and lowering the implement frame so as to vary...
4570672 Hydraulic control valve with independently operable bypass valve  
A hydraulic sectional control valve includes separate pump pressure and function control spools. The spools may be actuated independently and sequentially to provide raising, holding and power down...
4542678 Control arrangement for hydraulic motor  
A control arrangement for a hydraulic motor has an adjustable pressure medium supply device with a container, an unblockable check valve with a control connection, a plurality of chambers including...
4487106 Fluid operated system  
Fluid control systems frequently eliminate use of fluid operated jack protecting relief valves because additional visibility blocking and damage prone conduits are required to connect the relief...
4475710 Electro-hydraulic control actuator for turbine valves  
In an electro-hydraulic control assembly for turbine valves, including a shaft for the turbine valve, a valve housing, electrical control means, an electro-hydraulic converter connected to the...
4475440 Power steering control apparatus  
An improved power steering control apparatus includes a power steering motor having a piston rod which extends through one end of the motor cylinder. This results in the rod end of the piston...
4473128 Vehicular power steering system  
In a vehicular power steering system, the hydraulic fluid supply to a hydraulic power actuator is controlled in accordance with the vehicle speed and the angular velocity of the steering wheel....
4439063 Hydraulic control means  
A tunnel knife shield has a support frame, and a plurality of knife positioned side-by-side on the support frame. Each of the knives is associated with a double-acting hydraulic ram, the rams being...
4418794 Electromechanical control for hydraulic elevators  
In a hydraulic elevator, in which fluid is pumped to and from a tank into a piston to raise and lower the car, the flow of fluid is controlled by an apparatus which includes an electric motor that...
4410056 Hydraulic cab tilting system having full locking with controlled free-fall  
An hydraulic tilt system and method for its use with a cab pivotally mounted on a motor vehicle frame. An hydraulic piston-cylinder assembly pivotally connects between the cab and the frame. A...
4343454 Apparatus for individual isolation of hydraulically actuated valves  
Apparatus for individually isolating the hydraulic actuators of steam valves for a steam turbine while the turbine remains in operation and while all other steam valves associated with the turbine...
4313633 Self adjusting actuator system  
A self adjusting actuator system (32/32') has an actuator housing (40), a telescoping piston (52) defining therewith head and rod end chambers (58,60), and a compression spring (66) disposed for...
4273030 Pressure relief valve for the working pressure of a servo-steering system  
A pressure relief valve for the working pressure of a servo-steering mechanism of a vehicle, with a pressure medium connection between a high pressure connection adapted to be placed under a...
4249457 Vacuum servomotor  
A vacuum servomotor comprises a cup-shaped casing having a bottom wall provided thereon with a vacuum nozzle for connection to a source of vacuum and an air nozzle in communication with the...
4218997 Actuator devices  
The invention relates to an actuator device for a motor vehicle speed-responsive system, the device being operable to actuate the throttle valve or the like of the internal combustion engine of the...
4106390 Pneumatic linear actuator  
A digitally controllable pneumatic linear actuator in which a moving piston driven by compressed air is initially decelerated by the pressure of compressed air applied to the both sides thereof in...
Matches 1 - 50 out of 102 1 2 3 >