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Class 60/469 - Having means controlling or attenuating shock vibration, sticking or chattering


Subclass of Class 60 - Power plants
Definition: Apparatus with a structure (1) ameliorating or suppressing
No. of patents: 148
Last issue date: 11/29/2011


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NumberTitleIssue Date
8065875Method for springing a movement of an implement of a work machine
A method for springing a movement of an implement of a work machine during a movement of the work machine is provided, in which at least one hydraulic cylinder is connected to the implement for controlling its movements, comprising the steps of connecting a hydrauli...
11/29/2011
8037682Method and device for suppressing vibration of boom of concrete pump truck
The present invention discloses a method and device for suppressing vibration of boom of concrete pump truck, in which the boom cylinder is connected with the vibration suppression cylinder; the information about hydraulic pressure in the boom cylinder and/or about ...
10/18/2011
8006492Hydraulic steering system and method
A hydraulic steering system has a steering linkage and an actuator actuating the steering linkage. Pressurized hydraulic fluid can be fed to the actuator and removed from the actuator through a return pipe. A device installed into the return pipe counteracts volume ...
08/30/2011
7934377Apparatus for easing impact on boom of excavator and method of controlling the same
An apparatus for easing an impact on a boom of an excavator and a method of controlling the same are disclosed, which can minimize the vibration occurring in the boom due to the impact on a boom cylinder by actively controlling an amount of hydraulic fluid being sup...
05/03/2011
7703280Hydraulic ride control system for working vehicle
A hydraulic ride control system for a working vehicle such as a wheel loader is provided with boom cylinders, an actuator control valve for controlling a pressure in bottom pressure chambers of the boom cylinders, an accumulator connected to the bottom pressure cham...
04/27/2010
7637103Hydraulic control arrangement
Disclosed is a hydraulic control arrangement for damping wagging vibrations, wherein during operation a hydraulic cylinder of a lifting equipment can be connected to a hydraulic accumulator via a damping valve arrangement. The damping valve arrangement comprises a n...
12/29/2009
7621124Travel vibration suppressing device for working vehicle
A travel vibration suppressing device 20 is structured such that a directional control valve 30 for a bucket, a directional control valve 29 for a boom, a ride control valve 31 and a boom speed increasing valve 33 are integrally ar...
11/24/2009
7574860Damper valve and hydraulic power steering apparatus
A damper valve includes first and second chambers separated by a partition wall, hydraulic oil flowing from the first chamber to the second chamber via a supply path, and returning to the first chamber from the second chamber via a return path. A valve plate that is...
08/18/2009
7516614Hydraulic 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, a first control valve between the hydraulic cylinder and the accumula...
04/14/2009
7454906Hydraulic control system
What is disclosed is a hydraulic control system for controlling a hydraulic consumer actuating a working tool of a mobile equipment that is provided with oscillation damping means for attenuating oscillations during braking of the working tool. In accordance with th...
11/25/2008
7448208Hydraulic arrangement for a lifting arm pivotably mounted on a vehicle
A hydraulic arrangement is described comprising a lifting cylinder 10 for a lifting arm 12 pivotably mounted on a vehicle. A hose 22 selectively connects a working chamber 10a of the lifting cylinder 10 to a supply 16...
11/11/2008
7383682Hydraulic control arrangement for a mobile equipment
What is disclosed is a hydraulic control arrangement for a mobile equipment, such as for a backhoe loader or a wheel loader, wherein a working tool of the equipment is adapted to be actuated by means of a hydraulic cylinder whose pressure chambers may jointly be con...
06/10/2008
7363754Mowing machine
A control system for a trimmer head assembly includes a first arm including a first mowing device, a first cylinder connected to the first arm, a source of fluid in selective communication with the first cylinder via a fluid line, and an accumulator in selective com...
04/29/2008
7350354Hydraulic actuation apparatus for a motor vehicle clutch
A hydraulic actuation apparatus for a motor vehicle clutch includes a master cylinder, a slave cylinder, a hydraulic line forming a main fluid channel connecting the master cylinder to the slave cylinder to form a pressure space, and a damping member arranged in the...
04/01/2008
7337610Hydraulic arrangement
A hydraulic arrangement is provided for a spring support system. The hydraulic circuit arrangement includes a hydraulic cylinder, a hydraulic tank, a hydraulic conveying device, a hydraulic accumulator, a first selector valve arranged between the hydraulic accumulat...
03/04/2008
7325570Method and apparatus for noise suppression in a fluid line
An energy attenuation method and apparatus for a system conveying liquid under pressure. The apparatus is disposed in a liquid conveying structure of the system and includes first and second outer hose conduits, each of which respectively defines an associated first...
02/05/2008
7308789Hydraulic cylinder suspension method
The present invention discloses a hydraulic cylinder suspension method for actively controlling shock-induced vibration when a hydraulic cylinder in a construction vehicle makes a sudden stop, the method comprising the steps of: determining whether the hydraulic cyl...
12/18/2007
7302797Hydraulic system having a post-pressure compensator
A hydraulic system for a work machine is disclosed. The hydraulic system has a reservoir configured to hold a supply of fluid and a source configured to pressurize the fluid. The hydraulic system also has a fluid actuator, a first valve, and a second valve. The firs...
12/04/2007
7296404Apparatus for controlling deceleration of hydraulically powered equipment
A machine member driven by a hydraulic actuator may oscillate, or wag, when the hydraulic actuator decelerates or stops. The degree of oscillation is a function of the machine member's ability to track a deceleration command, which ability varies with changes in the...
11/20/2007
7278262Control system for suppression of boom or arm oscillation
A control for a working apparatus having a boom arm. The apparatus includes a controller operable to receive signals from at least one pressure sensor. The at least one pressure sensor detects pressure of hydraulic fluid in at least one chamber of a control valve. T...
10/09/2007
7269947Vibration control method and vibration control system for fluid pressure control circuit
A first fluid channel for operating an actuator and a second fluid channel for operating an actuator are connected to a boom cylinder, including a boom rod side line, a boom head side line. A first and second supply line and a first and second discharge line of each...
09/18/2007
7251936Suspension device
A suspension device is for at least one drive part (10) that is to be cushioned. The drive part can be connected to an accumulator device (12) by a first valve unit (28) and to a tank connection (46) by a second valve unit (34) to ...
08/07/2007
7249613Energy attenuation device
An energy attenuation device for a conduit that is adapted to convey a pressurized fluid therethrough, comprising a hose section disposed about a portion of the conduit, wherein such conduit portion is provided with at least one aperture, for example in a surface th...
07/31/2007
7243494Ride control circuit for a work machine
A hydraulic circuit for raising and lowering a load arm on a work machine is adapted to provide a ride control function which will cushion shocks through the load arm as the machine traverses rough terrain. The circuit includes a hydraulic ram that moves the load ar...
07/17/2007
7219494Hydraulic system comprising pressure-controlled damping means
Hydraulic systems generally comprise expansion hose lines and other damping elements which are provided with one or several serially connected hose chambers according to the generated pressure pulsation. The damping measures of the inventive hydraulic system are ini...
05/22/2007
7210912Reciprocating piston compressor having improved noise attenuation
A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap...
05/01/2007
7204086Method of operating a hydraulic system for a loader machine
A method of operating a hydraulic system of a loader arm carrying a working implement, the system having a ride improvement system and a selection valve connected to first and second chambers of a ram which operates the loader arm. A check valve assembly is provided...
04/17/2007
7194856Hydraulic system having IMV ride control configuration
A hydraulic control system for a work machine is disclosed. The hydraulic control system has a source of pressurized fluid and at least one actuator having a first and a second chamber. The hydraulic control system also has a first independent metering valve dispose...
03/27/2007
7168890Eccentric vibration system with resonance control
The present invention may be embodied as an eccentric vibration system comprising a major eccentric member, a minor eccentric member, first and second motor assemblies, and a transmission system. The transmission system operates in a first mode when a torque of the ...
01/30/2007
7168229Drop rate control for agricultural header
A method for controlling and modifying the drop rate of a header on an agricultural harvesting machine by providing a programmable electronic control unit capable of receiving operator input through an input device. The programmable electronic conrol unit generates ...
01/30/2007
7140178Hydraulic arrangement
A hydraulic arrangement is provided, including: a hydraulic cylinder that is provided with a first and a second chamber, a hydraulic reservoir, a hydraulic fluid feeder conveying hydraulic fluid, a hydraulic accumulator, a hydraulic line arranged between the hydraul...
11/28/2006
7137330Vehicle seat adjustment with actuator isolation valves
A fluid powered vehicle seat adjustment system comprising a fluid actuator a source of pressurized hydraulic fluid and a controller. The fluid actuator including first and second inlet/outlet conduits, and the controller selectively controlling and directing pressur...
11/21/2006
7124579Anti jerk valve
A hydraulic control system including a source (11) of fluid having a pressure responsive means (15) and an actuator. A main control valve (21) has ports (27,29) communicating with the actuator ports by means of first (41) and secon...
10/24/2006
7121089Hydraulic cylinder
In a hydraulic cylinder having a shock absorbing function, and capable of stopping as desired by an accumulator disposed within a cylinder rod. The accumulator includes an accumulator piston that divides the cylinder rod interior into first and second cylinder rod c...
10/17/2006
7117670Control device
A control device, in particular for working machines, such as wheel loaders, excavators or similar devices, includes at least one working tool (12), particularly a working shovel that can be actuated by at least one hydraulic working cylinder (10). The...
10/10/2006
7104054Hydraulic cylinder cushioning
A system for damping the extension and retraction of a hydraulic cylinder of a work vehicle at the ends of the cylinder's stroke. ...
09/12/2006
7089734Hydraulic system for wheeled loader
An hydraulic system for a wheeled loader comprising a loader arm assembly which carries a working implement and which is connected to the body and which is movable between raised and lowered positions by means of a hydraulic ram means and in which a hydraulic accumu...
08/15/2006
7069723Anti-reaction valve device, and control unit and hydraulically powered system comprising anti-reaction valve device
An anti-reaction valve device is configured to open such that a plunger and a sheet member move away from each other in association with first and second set difference pressures. Two anti-reaction valve devices are provided between two pipes fluidically connected t...
07/04/2006
7062832High-speed driving method of pressure cylinder
The invention includes a moving step of moving a piston to a target position by supplying and discharging compressed air to and from pressure chambers on opposite sides of the piston of a pressure cylinder by driving servo valves by a controller, a clamping step of ...
06/20/2006
7063200Pulsation dampening apparatus and clutch master cylinder
A pulsation dampening apparatus and a clutch master cylinder used for a hydraulic clutch operation system which has a hydraulic circuit. The apparatus has a housing which has a dampening chamber in the hydraulic circuit and a dampening assembly accommodated in the h...
06/20/2006
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