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| Number | Title | Issue Date |
| 7610845 | Adjustable stop assembly for a piston-cylinder unit The invention concerns an adjustable stop assembly, for limiting a stroke, designed for a piston-cylinder unit comprising a cylinder and a piston having a rod, said stop assembly serving to limit the stroke of a lifting device on a forklift truck. Said assembly has ... | 11/03/2009 |
| 7409901 | Variable stroke assembly A variable stroke assembly enables the piston stroke length of a positive displacement pump to be varied while maintaining a substantially constant unswept volume in the piston cylinder. Alternatively, a variable stroke assembly enables the piston stroke length of a... | 08/12/2008 |
| 7334514 | Balanced fluid-powered modular actuation system This invention provides a modular, efficient and self-feedback/balance, fluid-powered actuation system. This system comprises two basic modules; actuation module and positioning module, which are directly connected to each other. The actuation modules can be constru... | 02/26/2008 |
| 7250753 | Sensor attachment mechanism for fluid pressure cylinder Exemplary embodiments of the invention provide a sensor attachment mechanism capable of attaching a position detecting sensor having directivity in a proper direction to a fluid pressure cylinder having a rail extending along the length of a cylinder tube on the out... | 07/31/2007 |
| 7244357 | Pumps for filtration systems Improvements in product water throughput from a reverse osmosis (RO) membrane filter achieved by thinner feed spacers in the RO element, enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure... | 07/17/2007 |
| 7238012 | Rotary pump A rotary pump has a simple construction by omitting a transmission shaft on the side of a motor and whereby makes a cost of the rotary pump as low as possible, with maintaining feature that assembling and disassembling is facilitated. The rotary pump has a main casi... | 07/03/2007 |
| 7194949 | Magnet type rodless cylinder A magnet type rodless cylinder comprised of cylinder tube of a double tube structure provided with an outside tube of an elliptical flattened outside circumferential shape and two inside tubes inserted into the outside tube. When pressurized air is supplied alternat... | 03/27/2007 |
| 7191695 | Linear actuator A displacement amount-adjusting mechanism for adjusting the displacement amount of a slide table includes a stopper which faces a cutout formed at a bottom surface of the slide table and which is fixed to an upper surface of a main cylinder body, a first adjuster bo... | 03/20/2007 |
| 7134499 | Rotary and reciprocal well pump system A well pumping system has a downhole rotary pump that drives a downhole reciprocating pump. The reciprocating pump is an intensifier, having a primary piston and a secondary piston of lesser diameter. A sequencing valve connects between the discharge of the rotary p... | 11/14/2006 |
| 7005075 | Gas drive electrolytic cell The present invention is directed to an electrolytic cell that is completely sealed during the electrolysis operation during production of oxidant. Gasses generated within the electrolysis operation, primarily hydrogen that is liberated at the cathode surface, incre... | 02/28/2006 |
| 6988440 | Rotary actuator assembly A rotary actuator assembly is provided. The assembly has a flexible member that is attached to a piston for linear movement. The flexible member is also attached to a pinion for pivotable movement. ... | 01/24/2006 |
| 6966248 | Adjustable valve rod and pull tube guide for downhole pumps The guide has a barrel segment and a bushing segment. The barrel segment couples to the upper end of the pump barrel. The bushing segment has a bushing stop. The length of the guide is adjustable so as to vary the length of the bushing stop from the barrel. By varyi... | 11/22/2005 |
| 6837142 | Clamping cruise control system A cruise control assembly for use in connection with a hydraulic pump and a control arm linked to a swash plate that is moveable to provide the swash plate with a plurality of non-discrete angular orientations to affect fluid displacement of the hydraulic pump. The ... | 01/04/2005 |
| 6742440 | Servo-controlled integral stop for use with a servo-controlled hydraulic piston Apparatus, and an accompanying method for use therein, that utilizes working and stopping servo-controlled hydraulic pistons wherein the stopping piston acts as a controlled mechanical stop for the working piston. Both pistons are spaced apart along and coaxially ar... | 06/01/2004 |
| 6742441 | Continuously variable displacement pump with predefined unswept volume Apparatus and method for controlling an unswept volume in a piston system. The method includes rotating a shaft around a rotation point to drive a piston within a cylindrical volume in a periodic manner, modifying the stroke length of the piston, and moving the cent... | 06/01/2004 |
| 6606935 | Variable rate pump A rotational power input is converted into a linearly oscillating power output through the use of counter-rotating nested eccentrics. The outer eccentric is connected to an input end of a connecting rod, which is in turn connected at an output end thereof... | 08/19/2003 |
| 6050578 | Log trailer load booster A log trailer load booster is described for construction in combination with or attachment to a log trailer having a wheeled trailer frame, a payload receiving bunk on the trailer frame, and an elongated trailer beam for connection to a log truck. The boo... | 04/18/2000 |
| 6000675 | Tension-spring return rotary valve actuator A rotary valve actuator with movable actuator linkage maintained in a constant "pull-pull" tension, includes a sliding canister, rotatable lever, and a return spring substantially aligned in-line with each other. The linear motion of the canister in respo... | 12/14/1999 |
| 5884549 | Linear actuator A linear actuator comprising a guide section formed along a longitudinal direction to protrude on a bottom surface of a slide table, a pair of guide blocks formed mutually opposingly and seperated from each other by a predetermined spacing distance on an ... | 03/23/1999 |
| 5842549 | Piston stroke controller in a torque transmitting assembly Power transmission torque transmitting assemblies, such as clutches and brakes, have an axially movable piston which is hydraulically actuated to engage and enforce frictional contact between a plurality of friction discs. Upon piston retraction during di... | 12/01/1998 |
| 5617772 | Linear actuator A linear actuator has an actuator body having a through hole defined axially therein and an opening defined in an upper surface thereof, a pair of end blocks, a slide table reciprocally movable in the directions indicated by the arrows X, Y, a pair of cyl... | 04/08/1997 |
| 5467685 | Rodless pneumatic cylinder having a pair of driven elements A linear actuator, adapted especially for picking up and transporting workpieces, comprises a pneumatic, rodless cylinder having a pair of driven elements mounted on opposite sides of its body. The first driven element is directly connected to the piston ... | 11/21/1995 |
| 5429484 | Liquid feed pump particularly used for liquid medicine and liquid feed apparatus for filling of liquid medicine A metallic diaphragm is provided within a pump chamber. This diaphragm is oscillated by a stem to Feed liquid medicine. The stem is provided with a plate and a movement of this plate, i.e., a stroke of the stem is limited by a pair of stoppers. Relative p... | 07/04/1995 |
| 5429217 | Hydraulic positioner with integral continuously adjustable stroke limiter A hydraulic positioner of the type having a piston movable in a hydraulic cylinder and a valve actuatable for releasing the piston for movement in the chamber is provided with a continuously adjustable mechanism for limiting the stroke of the piston. The ... | 07/04/1995 |
| 5383714 | Vehicle having dump bed A vehicle is provided with a dump bed which can be pivoted from a horizontal orientation to a fully upright position to facilitate loading of material onto the dump bed and unloading material therefrom. A hydraulic or other type cylinder is used to raise ... | 01/24/1995 |
| 5335583 | Stopper mounting structure for use on rodless cylinder In a rodless cylinder, a moving member which is moved along a cylinder body is reduced in height for the sake of compactness and stability. A stopper is mounted on a stopper support base, which is also reduced in height to preclude the possibilities of ob... | 08/09/1994 |
| 5193430 | Air cylinder with intermediate mechanical dead-stop Presented is an air cylinder apparatus including a control mechanism that is operable to interject mechanical dead-stops to control the linear translation of the piston of the air cylinder to predetermined increments of travel.... | 03/16/1993 |
| 5191808 | Actuator end stop arrangement The arrangement comprises a stop bar (1) formed from a cylindrical rod having a lengthwise slot therein. The stop bar (1) is secured to a fixed support within an actuator casing (7). A stop plate (15) is slidably secured in the slot and presents upper and... | 03/09/1993 |
| 5190263 | Locking mechanism for an actuator A locking mechanism for an actuator prevents the unauthorized operation of the actuator and also permits a viewer to determine whether the actuator is in a locked open, locked closed or unlocked position. The invention utilizes a clear cover guard which i... | 03/02/1993 |
| 5144878 | Hydraulic actuator with wear take-up A hydraulic actuator (1) with automatic wear take-up, is formed with a first piston (17) sliding in a blind bore (13), a second piston (33) in a bore made in the first piston, and an output rod (3) bearing on the second piston. A first chamber (27) is for... | 09/08/1992 |
| 5133245 | Continuously adjustable stroke limiter for hydraulic positioner The stroke length in a positioner of the type having a piston rod movable through a cylinder can be preset through a continuous range of adjustment. A first detent element provided at the end of the cylinder engages another detent element positionable alo... | 07/28/1992 |
| 5133244 | Radial piston hydraulic motor of variable cylinder capacity In a radial piston hydraulic motor of the "star-shaped" type the variation of the cylinder capacity is achieved by the fact that the motor crankshaft is provided with a mechanism which varies the eccentricity, this mechanism being powered by hydraulic act... | 07/28/1992 |
| 5127315 | Brake motor subassembly and process for adjusting such a subassembly A brake motor subassembly comprises a control piston (10) having an internal cavity delimited by a base wall (18) and, at the periphery, by a stepped bore (20, 22, 24) and having a mechanical actuating device acting on the control piston via an automatic ... | 07/07/1992 |
| 5074763 | Telescopic moving equipment for driving a reciprocating pump Moving equipment for applying reciprocating drive to the diaphragm of a mechanically actuated diaphragm pump of adjustable stroke, the moving equipment comprising a slider slidably mounted in a fixed guide co-operating at one of its ends with an eccentric... | 12/24/1991 |
| 5058768 | Methods and apparatus for dispensing plural fluids in a precise proportion A fluid-driven proportioning pump for dispensing precise volumes of at least three different fluids includes a drive cylinder housing a correspondingly formed drive piston which divides the drive cylinder into first and second drive fluid chambers and is ... | 10/22/1991 |
| 5033518 | Fine adjustment for filling machine having piston differential pressure A filling machine wherein a lost motion mechanism is provided with a counteracting element to counteract forces between the driver and the filling unit to assure that the lost motion mechanism operates with lost motion. The counteracting element is provid... | 07/23/1991 |
| 4915012 | Control scheme for apparatus with moveable rail section A conveyorized transport apparatus has an overhead rail system for transporting articles on a suspended trolley from one location to another. A moveable rail section in the system has a pivotal connection with an adjacent rail section to pivot the moveabl... | 04/10/1990 |
| 4896506 | Transmission with integrated gear reduction A vehicle includes at least a pair of drive wheels, each wheel being independently controlled by an integrated transmission, each transmission being powered by an input shaft operably driven by a common engine. Each transmission is of a type wherein a pum... | 01/30/1990 |
| 4867355 | Self-contained cartridge means A self-contained cartridge for transporting and dispensing liquid chemicals. The cartridge includes a hollow body member open at the upper end and divided into a lower closed tank for holding liquid chemicals and an upper open end compartment. A pump is p... | 09/19/1989 |
| 4830589 | Variable stroke positive displacement pump A variable stroke positive displacement piston pump in which the effective eccentricity of the crankshaft controlling the stroke is adjustable by means of a worm/worm gear combination driving a hub to which eccentric rings are keyed.... | 05/16/1989 |
