Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8001882 | Double check valve having floating function A double check valve having a floating function is disclosed, which can prevent construction equipment from overturning through intercepting of a floating function even if a signal pressure is fed to the double check valve to perform the floating function in a state... | 08/23/2011 |
| 7721640 | Cable operated gas cylinder A cable operated gas cylinder comprises: a base tube; a spindle which is inserted at hollow part in said base tube; a cylinder which is mounted within said spindle; a piston dividing the gas-filled space within said cylinder into upper part and lower part; a pipe ho... | 05/25/2010 |
| 7637201 | Adjustable hydraulic support cylinder An adjustable length cylinder assembly includes a housing and a piston reciprocably mounted within the housing for movement between an extended position and a retracted position. The piston defines first and second hydraulic fluid chambers of differing cross-section... | 12/29/2009 |
| 7487707 | Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve A hydraulic circuit controls flow of fluid between first and second ports of a hydraulic actuator, such as a cylinder/piston arrangement and each of a supply conduit and a tank return conduit. The hydraulic circuit operates in standard powered operating modes as wel... | 02/10/2009 |
| 7430953 | Loading implement and process for loading implement A loading implement and method of operating a loading implement for the adjustment of a floating condition of a boom of the loading implement. The loading implement includes a hydraulic arrangement for the lifting and lowering of the boom, a hydraulic conveying devi... | 10/07/2008 |
| 7347117 | Hydraulic linear drive of a transmission actuator A hydraulic linear drive for a hydraulic vehicle transmission actuator has a piston/cylinder unit in which an adjusting piston is arranged so it is longitudinally displaceable in a cylinder housing and subdivides the cylinder space into at least two pressure spaces ... | 03/25/2008 |
| 7322270 | Safety circuit for media-operated consumers and process for its operation A safety circuit for media-operated consumers, such as steam turbines or gas turbines, includes at least one first solenoid valve (1.1) which acts on a fluid circuit. An actuating device (9) can be connected to the fluid circuit, and acts at the same t... | 01/29/2008 |
| 7249608 | Flow control for power steering The flow control device comprises a supply passage (2) for supplying hydraulic fluid discharged by a pump (1) to a power steering output section (8); a variable throttle section (3) situated at an intermediate position of the supply passa... | 07/31/2007 |
| 7237472 | Linear hydraulic stepping actuator with fast close capabilities The invention provides a choke system with hydraulic circuits which provide choke valve positioning that can be varied by the use of incremental steps. The incremental movement action in either the opening or closing direction is accomplished through the use of one ... | 07/03/2007 |
| 7231866 | Opening and closing switch structure for valve pin control of gas cylinder The cable type opening and closing switch structure for a valve pin control of a gas cylinder is disclosed. There is provided a cable type opening and closing switch structure for a valve pin control of a gas cylinder, comprising a ball that is slide-contacted with ... | 06/19/2007 |
| 7219592 | Valve arrangement and hydraulic drive The invention concerns a valve arrangement for controlling a hydraulic drive, the supply to and the outflow from the hydraulic drive being separately controllable. It is endeavoured to realise separate controls of the speed and the hydraulic pressure of the hydrauli... | 05/22/2007 |
| 7210395 | System for handling a tool at a vehicle The invention relates to a system for handling an implement on a vehicle which comprises a frame. The system comprises a lifting apparatus arranged between the frame and the implement for raising and lowering the implement in relation to the frame, a pump (11... | 05/01/2007 |
| 7174988 | Power steering system A power steering system includes a reversible-type oil pump supplying hydraulic fluid to first and second pressure chambers of a hydraulic power cylinder through first and second passages and having first and second discharge ports, and a branch passage conveying pa... | 02/13/2007 |
| 7134379 | Gas cylinder Disclosed is a gas cylinder, for improving sealing characteristics of the gas cylinder and improving convenience in manufacturing, including: a valve having a gas opening/closing pin at a through hole in its center, for intermittently passing a gas, and additionally... | 11/14/2006 |
| 7104181 | Hydraulic control circuit for a hydraulic lifting cylinder A hydraulic control circuit for a hydraulic cylinder is described for the raising and lowering of a boom on a telescopic loader. First and second chambers of the hydraulic cylinder are connected to a control valve over first and second supply lines and are selective... | 09/12/2006 |
| 7096773 | Telescopic pneumatic device A telescopic pneumatic device comprises an outer cylinder, an inner cylinder disposed in the outer cylinder and having a cylinder wall defining an air chamber, a piston mounted in the air chamber and having a piston rod connected thereto, a flow passage provided bet... | 08/29/2006 |
| 7036422 | Continuously lockable adjusting device The invention relates to a continuously lockable adjusting device 1, consisting of a fluid-filled cylindrical housing 2, of a piston 4 which is axially movable in the housing 2 and which subdivides the housing 2 into two pressure c... | 05/02/2006 |
| 7017470 | Flow control apparatus for construction heavy equipment Disclosed is a flow control apparatus for construction heavy equipment capable of maintaining constant set flow rate regardless of changes in load pressure and pump pressure. The flow control apparatus is composed of a control valve, a flow control valve, and a load... | 03/28/2006 |
| 7007587 | Snap-in rotatable cylinder control A control for a fluid cylinder includes a cylindrical housing made of a polymeric material which pivotally receives a control arm having a cable release receiving member at one end and which can be snap-fitted within an open end of a pneumatic cylinder to lockably e... | 03/07/2006 |
| 7003949 | Integrated three function valve An integrated three function valve (ITFV) that combines the functions of a bypass valve (e.g. 183a, 185a, 161a) into a single assembly is disclosed. The ITFV allows continued operation after any two failures. With the integr... | 02/28/2006 |
| 6990888 | Mechanism for switching between closed and open center hydraulic systems A mechanism is provided for use with a hydraulic control mechanism of a hydraulic tool. The hydraulic control mechanism is attached to the hydraulic tool to provide a desired hydraulically powered function. The mechanism allows the hydraulic control mechanism to be ... | 01/31/2006 |
| 6955115 | Hydraulic circuit having pressure equalization during regeneration A fluid system is provided wherein two different fluid circuits are connected in parallel with a single source of pressurized fluid and the two fluid circuits can function together even when one of the loads is lighter than the other. This is accomplished by having ... | 10/18/2005 |
| 6886450 | Activation device for a piston/cylinder unit which can be inhibited A piston/cylinder unit having a selectively inhibited movement includes a cylinder filled with a hydraulic medium and a piston arranged on a piston rod and dividing the cylinder into working spaces. A flow connection system having a flow connection is arranged betwe... | 05/03/2005 |
| 6877417 | Fluid pressure circuit To perform boom-down operation by operating a boom cylinder (6) by an external load (W) while simultaneously operating an arm cylinder (26) or a bucket cylinder (27) in the state the bucket is off the ground, a first boom directional control val... | 04/12/2005 |
| 6739129 | Electrohydraulic motor pump aggregate, attachable element and pressure limiting valve An electromotor M of a electrohydraulic motor pump aggregate G drives at least one pump stage P, P1, P3. An attached element C is inserted between at least one pressure side port of the pump stage, a return line 13, and at least one consumer por... | 05/25/2004 |
| 6705201 | Activation device for a piston/cylinder unit A piston/cylinder unit, in particular a gas spring, includes a valve device for the operational motion of a piston rod. The valve device is activatable by an activation device, the activation device being connected near an actuation device and being connected to a l... | 03/16/2004 |
| 6691604 | Hydraulic system with an actuator having independent meter-in meter-out control A fluid circuit is provided to independently control the flow of fluid into and out of each end of an actuator. This is accomplished by having two different independently controlled valves controlling the flow of fluid into and out of one end of the actua... | 02/17/2004 |
| 6658842 | Hydraulic system A hydraulic system includes an air sucking hydraulic circuit 8, an air sucking control valve 5, and a check valve 6 provided in or before and after the air sucking hydraulic circuit 8, hereby allowing a hydraulic fluid from the air sucking control valve 5... | 12/09/2003 |
| 6422584 | Hydraulic system for damping the motion of rotation of a swivel joint between two vehicle parts of an articulated vehicle, of an articulated bus for example A hydraulic system for damping the motion of rotation of a swivel joint between two vehicle parts of an articulated vehicle, of an articulated bus for example, comprising a hydraulic damping device as well as an electrically triggerable proportional press... | 07/23/2002 |
| 6418715 | Hydraulic actuating arrangement The two working chambers (2, 2', 3) of a working cylinder (1) of a hydraulic actuation arrangement may be directly connected with one another via a switchable dual-position valve (11), if necessary, whereby a resistance-free manual displacement of the com... | 07/16/2002 |
| 6389952 | Apparatus and method of operating a fluid cylinder of a work machine A work machine is disclosed. The work machine includes a work implement and a fluid cylinder mechanically coupled to the work implement. The fluid cylinder is controlled by an apparatus that automatically places the fluid cylinder in a float mode of opera... | 05/21/2002 |
| 6382077 | Air pressure tube assembly for elevation-adjustable seat stand An air pressure tube assembly for elevation-adjustable seat stand is constructed to include a barrel, an inner tube mounted inside the barrel, a top cap mounted in one end of the barrel, a first valve and a second valve connected in a line between the top... | 05/07/2002 |
| 6354790 | Attachment for earth-moving machines An attachment connectable to a boom member of a machine for performing work functions generally consisting of a handle pivotally connectable to a boom member of the machine, a ground engageable arm member pivotally connected to the handle and an extendabl... | 03/12/2002 |
| 6327956 | Hydraulic control with improved regenerative valve apparatus and method An improved method and apparatus utilizing regenerative hydraulic control principles are disclosed. A regenerative valve is operatively connected in a hydraulic control circuit with a primary hydraulic cylinder for controlling the speed at which the pisto... | 12/11/2001 |
| 6267548 | Automatic over center system The present invention is directed to a control circuit for automatically bringing a hydraulically operated work arm into a particular position without having to manually reverse the direction of the hydraulic operating system.... | 07/31/2001 |
| 6202410 | Hydraulic system for forklift A hydraulic system for a forklift includes a handle angle sensor for outputting a rotational angle signal indicative of a rotational angle of a handle, a wheel angle sensor for outputting a wheel angle signal indicative of a steering angle of wheels, and ... | 03/20/2001 |
| 6186044 | Fluid control system with float capability A fluid control system provides a float capability for a double-acting actuator. The system includes pilot operated check valves disposed between the double-acting actuator and first and second ports of a pilot operated directional control valve. The dire... | 02/13/2001 |
| 6173639 | Fluid control system having float control A fluid control circuit providing a float capability for a double-acting actuator having first and second actuating chambers is provided. The fluid circuit includes signal controlled load check valves disposed between the actuating chambers and a directio... | 01/16/2001 |
| 6148947 | Power assisted steering unit for motor vehicles To provide a particularly simple and cost effective design of a power-assisted steering unit for motor vehicles for supplying a servo-cylinder (3) with a hydraulic fluid as a function of the travelling speed and the steering rate, comprising a steering va... | 11/21/2000 |
| 6120237 | Attachment for groundworking and material handling machines and a strut assembly therefor An attachment connectable to a boom member of a machine for performing work functions generally consisting of a handle pivotally connectable to a boom member of the machine, a ground engageable arm member pivotally connected to the handle and an extendabl... | 09/19/2000 |
