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| Number | Title | Issue Date |
| 7721641 | Air compression apparatus and method of use An air compression apparatus has a frame, a tank, and a motor. A drive mechanism is operably connected to the motor and at least one piston assembly is operably connected to the drive mechanism and configured to move within a respective cylinder mounted to the frame... | 05/25/2010 |
| 7429167 | Scroll machine having a discharge valve assembly A discharge valve assembly is provided for preventing reverse rotation of a scroll compressor. The discharge valve assembly includes a cup-shaped valve member slidably engaged with a central post of a retainer member. The cup-shaped valve member includes notches in ... | 09/30/2008 |
| 7395749 | Pneumatic cylinder A pneumatic cylinder having a cushioning valve assembly. A tubular body is capped by a pair of cylinder heads. A hollow cylinder rod having a piston assembly and cushioning valve assembly is seated within the tubular body for reciprocating action therein. The piston... | 07/08/2008 |
| 7395748 | Hydraulic drive for displacing an actuator A hydraulic drive is described for displacing an actuator (7) between two predetermined end positions, comprising a piston unit (4) which can be pressurized in a cylinder unit (3) in opposite directions by way of hydraulic springs and a control ... | 07/08/2008 |
| 7337805 | Valve with adjustable stop An adjustable mechanism for a valve or actuator is provided. The adjustable mechanism cooperates with one or more pistons, which in turn cooperates with a valve element to limit the axial displacement of the valve element relative to the valve seat. The adjustable m... | 03/04/2008 |
| 7290622 | Impact device with a rotable control valve An impact device includes a frame to which a tool is connectible, and a stress element that is supported on the frame and disposed between the frame and the tool. A hydraulic control system leads pressurized hydraulic fluid into and out of a hydraulic fluid space su... | 11/06/2007 |
| 7228784 | Rotary or pivoting device and connection module for a rotary or pivoting device The invention relates to a rotary or pivoting device (10) comprising a housing (12), at least one working piston (14) that is located in the housing and can be impinged by hydraulic fluid and a pivoting part (20), which is rotatably drive... | 06/12/2007 |
| 7204184 | Guide system with pneumatic stop for a movable component In a guide system with a pneumatic stop structure comprising a cylinder with a piston including a piston seal element movably disposed in the cylinder and a piston rod connected to the piston and extending from the cylinder wherein a displacement chamber is formed a... | 04/17/2007 |
| 7121237 | Device and a method for the generation of pressure pulses A device for the generation of pressure pulses, includes a cylinder (3), a piston that is displaceably arranged in the cylinder (3), a pressure fluid circuit with an inlet (6) into and an outlet (7) out of the cylinder (3) on one s... | 10/17/2006 |
| 7121089 | Hydraulic 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 |
| 7066074 | Fluid motor The piston of a fluid motor divides the cylinder into two variable volumes into which and from which fluid may be selectively introduced and exhausted via ports through the cylinder to relatively move the piston and the cylinder. The piston is modified to define two... | 06/27/2006 |
| 7055319 | Piston and cylinder assembly with volume compensating system A piston and cylinder assembly having a cylinder with a piston and a connected piston rod. The piston defines opposed chambers wherein a compensating device is disposed in at least one of the chambers. The compensating device includes a capsule of an elastic materia... | 06/06/2006 |
| 7021192 | Cylinder apparatus A pair of throttle valves are installed to first and second installation holes of a cylinder tube, respectively. The throttle valve comprises a rotatable member, a needle which is engaged with the rotatable member and which controls the flow rate of a pressure fluid... | 04/04/2006 |
| 6942204 | Extension spring strut An extension spring strut comprises a pre-loaded extension spring with a damper disposed therein. An operating element is disposed inside the extension spring, having an actuating tappet that is joined to an end of the extension spring. The actuating tappet is displ... | 09/13/2005 |
| 6817592 | Electromagnetic valve actuator with soft-seating The electromagnetic valve actuator of the preferred embodiments include a valve head that moves between an open position, a middle position, and a closed position; a plunger coupled to the valve head; and a housing defining a cavity that surrounds the plunger and co... | 11/16/2004 |
| 6776356 | Hydraulic actuator for supporting a boom A hydraulic actuator is provided for controlling relative movement between first and second structures between which the actuator is mounted, for example between a boom and the base frame of an agricultural sprayer, while providing some resilience in the form of sus... | 08/17/2004 |
| 6755113 | Accumulated semi-active hydraulic damper A semi-active hydraulic damper includes a cylinder, an accumulator, an oil box, and a directional control member. A directional control valve of the directional control member is connected to a first, and a second primary oil circuits, which are respectively connect... | 06/29/2004 |
| 6681730 | Hydraulic damper for an electromechanical valve A hydraulic system for an electromechanical valve is provided. The system includes a housing defining a chamber for holding fluid extending along an axis. The system further includes a damper stem disposed in the chamber configured to move along the axis.... | 01/27/2004 |
| 6675751 | Two-mass bi-directional hydraulic damper A hydraulic damper for an automotive engine electromechanical cylinder valve 20 is provided. The hydraulic damper includes an inner piston 130 which is slidably mounted within an outer piston 110. The outer piston is slidably mounted within an interior hy... | 01/13/2004 |
| 6584885 | Variable lift actuator An actuator comprises a cylinder, a first, second and third port, an actuation piston, a control piston and a control spring. The cylinder defines a longitudinal axis and comprises a first and second end. The first port communicates with the first end of ... | 07/01/2003 |
| 6557456 | Cushioned actuator An actuator for use with a lift truck having an extendible mast includes an elongated housing and an axial bore formed in said housing. The bore has a first end and a second end. A ram is slidably and sealingly mounted in the bore for axial movement betwe... | 05/06/2003 |
| 6553889 | Compact pneumatic cylinder, with cushioning device The pneumatic cylinder includes a tubular body defining a piston chamber for a piston member, closed by front and rear heads; each head is provided with an inlet-outlet port for pressurised air, which opens out towards an annular slot coaxially arranged a... | 04/29/2003 |
| 6536327 | Double acting cylinder with integral end position volume chambers A pneumatic cylinder having a cylinder tube with at least one open end coupled to an end cap to close the open end. The pneumatic cylinder includes a piston reciprocally movable in the cylinder and the piston has a first seal to create a substantially flu... | 03/25/2003 |
| 6497172 | Rotary actuator with cushion mechanism A rotary actuator has a cushion mechanism for stopping a vane at a rotational terminal end position in a cushioning manner. The cushion mechanism has first and second openings. The first opening discharges an exhaust air pressed out from a cylinder hole b... | 12/24/2002 |
| 6487954 | Piston deceleration system A piston deceleration system includes an elongated piston shaft having an intermediate stop member and a second stop member formed thereon. A piston member is slidably seated on the elongated shaft between the intermediate stop member and the second stop ... | 12/03/2002 |
| 6408739 | Pneumatic cylinder with internal liquid dampening means A pneumatic cylinder having internal hydraulic dampening device for cushioning the motion of a pneumatic piston (44) at its end of stroke. The hydraulic device includes a pair of hydraulic pistons (50, 52) cooperating with a pair of hydraulic cylinders to... | 06/25/2002 |
| 6349628 | Helix thruster Helical thruster having a housing, a piston movable axially within the housing between retracted and extended positions, and an output member rotatively mounted on the housing. Pressurized fluid is applied to the piston to drive the piston from the retrac... | 02/26/2002 |
| 6178868 | External pneumatic cushion system for air cylinder A system by which the air exhausted from either end of a pneumatic cylinder is directed, by an arrangement of control valves, to external surge tanks of appropriate volume where it is compressed to produce a deceleration effect at the end of each stroke b... | 01/30/2001 |
| 6167795 | Container box and lifter features A refuse collection truck may be combined with a relatively larger refuse container having a cart lifting apparatus supported on such container. The truck has dump arms for selectively dumping the larger container. The cart lifting apparatus has a dumper ... | 01/02/2001 |
| 6056251 | Adjustable-height column with depth spring action Adjustable-height column, especially for chairs, includes a guide tube and a pneumatic, selectively blockable piston-cylinder unit for height adjustment located in the guide tube. The piston sealingly subdivides the cylinder into two operational chambers.... | 05/02/2000 |
| 6014924 | Slide drive arrangement A slide drive device has a principal housing, in which at least one actuating element able to be driven linearly is arranged. Externally on the principal housing there is a slide kinetically coupled with the actuating element. Two stroke limiting means re... | 01/18/2000 |
| 5983778 | Telescopic hydraulic hoist apparatus A telescoping hydraulic hoist formed from a non-corrosive material provides bearings and hydraulic seals about the bottom portion of each intermediate moving stage. The bearings and hydraulic seals are thus always maintained within the hoist and are not e... | 11/16/1999 |
| 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 portion 34 is mounted upright integrally in the center of the ... | 10/05/1999 |
| 5943939 | Fluid pressure cylinder A fluid pressure cylinder wherein the configuration of a gasket groove for dividing a flow path is changed such that a first communicating passage (and a piping port), a cushion valve inserting hole (and a cushion valve control hole), etc. can be disposed... | 08/31/1999 |
| 5850776 | Fluid pressure cylinders provided with impact absorbing mechanisms A fluid pressure cylinder includes a cylinder body, a piston accommodated in the cylinder body to define first and second pressure chambers therein, means for supplying fluid to each chamber to reciprocate the piston between a first stroke end and a secon... | 12/22/1998 |
| 5826485 | Residential refuse collection cart lifter with universal feature A lifter automatically adapts to pick up different style residential refuse collection carts. An upper movable clamp bar cooperates with a finger support bar to grab a smooth-sided cart with a single upper lifting lip. A hinged saddle and hinged sliding h... | 10/27/1998 |
| 5784947 | Residential refuse collection cart lifter with universal features A lifter automatically adapts to pick up different style residential refuse collection carts. An upper movable clamp bar cooperates with a finger support bar to grab a smooth-sided cart with a single upper lifting lip. A hinged saddle and hinged sliding h... | 07/28/1998 |
| 5737998 | Heavy-load hydraulic or air cylinder A heavy-load hydraulic or air cylinder comprises a main body provided therein with an action rod having an driven end. The driven end is exerted on by the liquid or air pressure to actuate the action rod. The driven end is provided respectively on both si... | 04/14/1998 |
| 5718316 | Electronically controlled clutch pedal dashpot driveline torque An electronically controlled clutch pedal dashpot driveline torque limiter utilizes a solenoid to regulate the apply rate of a vehicle master clutch based on current vehicle operating conditions such as engine speed, transmission input speed, and clutch p... | 02/17/1998 |
| 5694827 | Dump body cushion An apparatus for cushioning a body of a dump vehicle when the body is lowered, including structure defining a fluid passageway between first and second end portions of the structure. The structure is adapted to be disposed in a fluid pressure operated act... | 12/09/1997 |
