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| Number | Title | Issue Date |
| 7866252 | Gasket, cover with gasket, and pneumatic cylinder with cover and gasket A gasket includes a damping buffer (1) for a piston (2) that can be charged with a pressure medium and that can be moved back and forth axially in a cylinder pipe (3) and includes at least one static seal (4) for sealing the cylinder pipe... | 01/11/2011 |
| 7387061 | Control apparatus for hydraulic cylinder Cushion chambers (8) disposed in the vicinity of both ends of a hydraulic cylinder (1) to throttle inflow or outflow of an operating oil caused by a piston (5) moving close to a piston stroke end, pressure sensors (16, 17) to detect press... | 06/17/2008 |
| 7309063 | Gas-filled spring for a vehicle, such as a motor cycle, and valve for such a gas-filled spring A gas-filled spring (1) operates using gas (13, 14) and may be intended for a motor cycle. The gas-filled spring comprises a cylinder (2) and a piston (4), said cylinder comprising a compression chamber and a return chamber (8, 9).... | 12/18/2007 |
| 7240607 | Removable end plug A pressure assembly including a cylinder, an end plug and a split ring band. The cylinder has an end, an inner surface and an outer surface. The end plug is inserted into the end of the cylinder, the end plug having an outer surface that is in partial contact with t... | 07/10/2007 |
| 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 |
| 7101142 | Hitch mounted refuse container lifting system A hitch mountable refuse container transport device has a vertical element supporting a telescoping mount, in an exemplary embodiment, that carries engagement keys on a horizontal bracket. Each key is adapted for engagement with an upper attachment element and a low... | 09/05/2006 |
| 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 |
| 6932870 | System and process for dispensing an adhesive onto a core during the formation of rolled products A process and system for applying an adhesive to a core during the production of rolled paper products is disclosed. The system of the present invention is generally directed to the use of pumping devices that meter out constant volumetric amounts of an adhesive ont... | 08/23/2005 |
| 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 |
| 6739235 | Hydraulic control device A hydraulic control device having a hydraulic actuator with a cylinder space, in which a piston is accommodated. In the cylinder space the piston bounds a first chamber and second chamber. The housing is provided with a first and a second connection for the supply a... | 05/25/2004 |
| 6698817 | Variable rate covering system for open top vehicle containers A variable rate covering system for open top vehicle containers includes a hydraulic actuating system for pivoting arms carrying a roll up cover wherein the fluid flow rates to the hydraulic cylinders are reduced during the initial and final phases of the... | 03/02/2004 |
| 6575186 | Multiple speed slit valve controller Described is a system designed to control the slit valve used to isolate chambers in cluster tools used in integrated circuit (IC) fabrication. This method changes the slit valve door actuator pneumatic pressure and movement during the closing sequence. A... | 06/10/2003 |
| 6523452 | Hydraulic cylinder cushion device A cushion ring 26 enters the inner circumference of a cushion seal 34 near the end of a piston stroke, the cushion seal 34 being free to displace by a certain amount in the axial direction of a piston rod 23 in a cylinder head 28, and exerts a cushion eff... | 02/25/2003 |
| 6481331 | Working cylinder actuated by hydraulic fluid A pressure medium-actuated working cylinder axially displaceable between two end positions in a cylinder space, with opposite changes in, the volumes of two cylinder chambers on its two sides. A damping element is arranged on one side of a piston. A passa... | 11/19/2002 |
| 6386088 | Hydraulic cylinder A hydraulic cylinder in which a recess (21) is formed in a piston rod (3) side end surface (20) of a piston (4) so that the recess (21) serves as an axial fitting portion, and an end of the piston rod (3) is fitted into the recess (21) of the piston (4) t... | 05/14/2002 |
| 6382074 | Pneumatic cylinder with damping device A pneumatic cylinder provided with a damping device to decelerate the piston inside a piston chamber at an end of its working stroke, while reducing the impact forces. The damping device comprises a restricted flow path for the fluid and a closing member ... | 05/07/2002 |
| 6295917 | Lost motion cylinder A lost motion cylinder has a hydraulic cylinder having a moving piston therein wherein the piston head divides the cylinder into first and second compartments; a first conduit connected to the second compartment of the cylinder to deliver a flow of lubric... | 10/02/2001 |
| 6283008 | Shock-proof hydraulic cylinder The invention relates to a shockproof hydraulic cylinder that has a cylinder housing (1), in which a plunger (4) that is driven via a plunger shaft (10) is arranged to move axially, and optionally a hollow-cylinder damping plunger (11). Using different em... | 09/04/2001 |
| 6279451 | Air cylinder with cushion mechanism A small-sized and inexpensive air cylinder with a cushion mechanism having a simple structure is provided. Therefore, discharge outlets for discharging cushioning air are disposed in positions closer to ends of the stroke than the openings of the ports in... | 08/28/2001 |
| 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 |
| 6047627 | Piston end dampening A pressure medium driven device has a cylinder having a cylinder tube, means forming a discharge outlet for a pressure medium, a piston movable in the cylinder over a stroke having a stroke end which is dampened by a counter pressure generated by throttli... | 04/11/2000 |
| 6003431 | Rotary actuator A rotary actuator including a housing provided with a fluid actuated drive assembly operatively connected to a rotary plate arranged to effect the drive thereof, wherein the housing and the rotary plate are provided with complementary cooperating stop abu... | 12/21/1999 |
| 5943862 | Hydropneumatic machine tool with cushioning A machine tool which operates with a hydropneumatic pressure intensifier whose step piston is braked hydraulically in particular towards the end of its stroke by forcing hydraulic fluid from a braking cavity formed during the stoke via a choke point.... | 08/31/1999 |
| 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 |
| 5716160 | Mounting device for cushion plunger in hydraulic cylinder A device for mounting a cushion plunger to one end of the piston rod in a hydraulic cylinder, the cushion plunger constituting a part of a cushion mechanism installed to dampen the impact generated during the rotation of the piston in the hydraulic cylind... | 02/10/1998 |
| 5706713 | Decelerating air pressure circuit for an air cylinder A decelerating air circuit having an air cylinder is disclosed. The decelerating air circuit includes a driving solenoid valve having an advance mode and a withdrawal mode. A decelerating solenoid valve having a high speed mode and a low speed mode has an... | 01/13/1998 |
| 5584225 | Hydraulic cylinder, especially a trim and tip cylinder for outboard type boat propeller drive units A hydraulic cylinder provided in its piston with axial channels with check valves permitting fluid flow in one direction from one cylinder chamber to the other. Constricting means in the form of a spring-biased plate displaceably mounted on the piston rod... | 12/17/1996 |
| 5546847 | Hydraulic cylinder snubbing arrangement A hydraulic cylinder snubbing arrangement includes a pilot operated control valve having a predetermined snubbing position at which flow exhausted from a hydraulic cylinder actuating chamber must pass through a plurality of flow restricting orifices in a ... | 08/20/1996 |
| 5429035 | Rodless cylinder with a speed control mechanism A rodless cylinder with a speed control mechanism comprising a cylinder tube, a hollow cushion ring located at an end of the cylinder tube and adapted to be inserted in a hollow portion of a piston, and a sine function groove formed in the outer surface o... | 07/04/1995 |
| 5377721 | Control apparatus for electroviscous fluid A control apparatus for an electroviscous fluid has a pair of electrodes between which the electroviscous fluid is disposed and a control device for applying nearly-trapezoidal shaped pulses positive and negative voltages alternately across the electrodes... | 01/03/1995 |
| 5373777 | Linear hydraulic motor with snubber A linear hydraulic motor including a first piston rod (12) and piston head (16), a second piston rod (18) and piston head (26), and a cylinder housing (30), having a divider wall (46), adapted to reciprocate longitudinally on the piston heads (16, 26). Th... | 12/20/1994 |
| 5333984 | 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... | 08/02/1994 |
| 5207145 | Work cylinder, such as the work cylinder of a rodless piston cylinder This invention relates to a work cylinder having damping stops for limiting movement of the piston within the cylinder, the cylinder having cylinder covers for closing the ends of the cylinder, whereby the damping stops are positioned and retained substan... | 05/04/1993 |
| 5187933 | Variable displacement pump with hydraulic adjustment for controlling the delivery rate and/or the pressure with respect to at least two consumers The invention relates to a variable displacement pump supplying fluid to a number of consumers. The pump control for adjusting the delivery rate is actuated by a signal which is produced by the respective highest loaded consumer. The signal is provided by... | 02/23/1993 |
| 5072648 | Control system for a fluid operated jack A control system for a fluid operated jack reduces the speed of retraction of a piston rod of the jack to an acceptable rate during a preselected range of operation by adding pressurized fluid flow to the fluid being exhausted from the jack through a rest... | 12/17/1991 |
| 5063828 | Actuator with a lock mechanism An actuator including a cylinder having a longitudinal bore, a piston slidably and sealingly inserted into the cylinder, and a lock mechanism for temporarily locking the piston, the cylinder including a cylinder body having the longitudinal bore, a cylind... | 11/12/1991 |
| 5024635 | Relating to ram units in transmissions of the toroidal race, rolling traction type A hydraulic ram unit for a transmission of the toroidal-race, rolling-traction type. The ram is connected to the rollers of the transmission so that the position of the ram within its stroke is related to the angular setting of the rollers and so to the t... | 06/18/1991 |
| 4964292 | Shock-absorbing fluid-actuated pressure system A push-pull tool for setting multi-piece fasteners includes a piston that is movable back and forth within a cylinder in response to fluid forces on opposite faces of the piston. One of the fluids is an air-oil foam mixture that acts essentially as an inc... | 10/23/1990 |
| 4887511 | Hydraulic control valve apparatus A hydraulic operating apparatus for a circuit interrupter comprises a conversion unit for converting input information from the exterior concerning a speed control pattern into an electrical signal for driving a linear or servo motor according to the clos... | 12/19/1989 |
| 4780064 | Pump assembly and its method of operation An overall pump assembly for smoothly pumping a compressable liquid from a supply is disclosed herein along with two intensifiers which form part of the assembly and a control arrangement for driving the intensifiers in specific phase relationship to one ... | 10/25/1988 |
