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| Number | Title | Issue Date |
| 7677156 | Piston load of vehicle height adjusting shock absorber and method of machining the same A piston rod installed to a vehicle height adjusting shock absorber includes a body portion having a hollow portion with first and second ends that are open. A step portion extends inwardly into the hollow portion a predetermined length from the first end of the hol... | 03/16/2010 |
| 7603943 | Linear actuator for rotating shaft assemblies A linear actuator for a rotating shaft assembly includes a cylinder and a piston arranged within a cavity defined by the cylinder. Faces of the piston delimit first and second chambers within the cavity. A rotatable shaft fixed to the piston defines a first main pas... | 10/20/2009 |
| 7600464 | Multi-piece piston for a free piston machine The concentricity and coaxiality of a central bore through a piston for a free piston Stirling machine is improved with a piston that has a sleeve with a core constructed from at least two, separate, axially-engaging core components sealed within the sleeve. During ... | 10/13/2009 |
| 7594466 | Actuator with a protective sleeve for a piston The invention relates to an actuator for heavy machinery including a cylinder, a piston and a protective sleeve. The cylinder forms a chamber for receiving a fluid, and includes an external flange extending radially and outwardly from the cylinder. The piston is ope... | 09/29/2009 |
| 7500425 | Axial piston machine The invention relates to an axial piston machine, in particular, an air-conditioning compressor for motor vehicles, with at least one piston, an essentially cylindrical piston shaft and an enclosure, which encloses a tilt ring or a tilt disc and a piston slipper sli... | 03/10/2009 |
| 7350871 | Equipment and supplies lift accessory An accessory for use in conjunction with a utility vehicle for the lifting and hauling of equipment and supplies, including an integrated platform base, either of a grid work of supporting frames and rods, or of a solid platform type, having upright columns and brac... | 04/01/2008 |
| 7197975 | Piston-cylinder unit Piston-cylinder unit including a working cylinder; a piston attached to a piston rod and installed with freedom of axial displacement in the working cylinder; and fastening elements, at least one of which is screwed into a threaded bore in the piston rod, where the ... | 04/03/2007 |
| 7172407 | Injection unit for injection molding machines with continuously operating plasticizing unit An injection unit for an injection molding machine includes a plasticizing unit in the form of an extruder, a plunger-type injection device, which can be connected to the injection molding machine by an injection nozzle. The plunger-type injection device defines an ... | 02/06/2007 |
| 7134383 | Piston arrangement The invention concerns a piston arrangement having a piston with a piston head and a piston skirt with a circumferential surface, and a connecting rod, which is connected with the piston via a ball joint comprising a ball, and penetrated by an oil supply channel, wh... | 11/14/2006 |
| 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 |
| 7100494 | Piston arrangement The invention concerns a piston arrangement having a piston with a piston head and a piston skirt and a connecting rod, which is connected with the piston via a ball joint arrangement comprising a ball, the ball being held in the piston by means of a safety element.... | 09/05/2006 |
| 7080589 | Hydraulic cylinder The invention relates to a hydraulic cylinder comprising a piston rod bearing at least one tool receiving element. Said hydraulic cylinder is characterized by an automatic disconnection device which is controlled in a hydraulic-mechanical manner, with a medium for t... | 07/25/2006 |
| 7047734 | Hydraulic circuit for hydraulic cylinder A hydraulic circuit for a hydraulic cylinder capable of executing and adjusting a shock absorbing function at the time of stopping the operation of a cylinder piston rod and releasing the function, comprises a damping control valve (v1) having a first switchi... | 05/23/2006 |
| 7047611 | High performance intermediate servo assembly and method of use A high performance intermediate servo assembly wherein the servo piston has been modified to provide at least a 17% increase in surface apply area and a corresponding increase in hydraulic pressure delivered to the 2nd gear clutch band which it actuates. ... | 05/23/2006 |
| 6931892 | Drainage control device for washing machines A drainage control device for washing machines is disclosed. This device controls the drain port, provided at the bottom of a washing tub, thus draining water from the washing tub in accordance with an operational mode of a washing machine. This drainage control dev... | 08/23/2005 |
| 6813988 | Sequential hydraulic extension system A serial, multi-unit hydraulic system which utilizes a single hydraulic fluid circuit each for extending and retracting all constituent hydraulic units. The fluid circuit for retraction of a remote hydraulic unit extends through intervening, primary hydraulic unit(s... | 11/09/2004 |
| 6526865 | Weld cylinder According to the present disclosure, a fluid cylinder is provided that is configured to move an object between first and second positions. The fluid cylinder includes a cylinder housing and a shaft configured to move between extended and retracted positio... | 03/04/2003 |
| 6422349 | Hydrostatic displacement drive for lifting and lowering and holding loads, in particular for lifts The hydraulic or pneumatic drive for lifting and lowering loads, in particular for lifts, has a working cylinder (11) forming a pressure chamber (14) connected to a pressure fluid source (39) and subjected to a pressure fluid. It also has a lifting piston... | 07/23/2002 |
| 6282893 | Self-contained actuator A hydraulic cylinder in which the cylinder head contains a motor-driven fluid pump, fluid reservoir, and a main control valve for the cylinder. The cylinder includes a transfer tube that extends through the center of the cylinder's piston and terminates w... | 09/04/2001 |
| 6257122 | Clamping cylinder The invention relates to a clamping cylinder for operating, for instance, a chuck by means of a pull pipe or pull rod installed preferably in a turning machine. The clamping cylinder has a cylinder casing (4) comprising a screwed-on cover plate (5), an ax... | 07/10/2001 |
| 6113356 | Hydraulically liftable mobile pumping apparatus A placement and orienting apparatus for a pump and water passing pipe assembly includes a wheeled trailer supporting the pump and water passing pipe assembly; an upper frame structure; a lower frame structure; a turntable bearing assembly positioned betwe... | 09/05/2000 |
| 5979667 | Sorting system including an improved reject mechanism A sorting mechanism for use in apparatus for sorting debris, unripe and ripe comestibles including a paddle and a drive cylinder for moving a bearing supported shaft which drives the paddle and a skirt for protecting the bearing.... | 11/09/1999 |
| 5937733 | Spring brake actuator with internal breathing conduit A spring brake actuator (10), with a large-force compression spring (82) in a second spring chamber (78) of the housing, has vent openings (100) in the housing communicating with the second spring chamber (78). A filter assembly (134) covers the vent open... | 08/17/1999 |
| 5906150 | Valves incorporated structure in a tension adjusting cylinder body for a crawler type vehicle Valves 4,5 are disposed in such a portion which is defined in an end portion of a piston 30 of an adjusting cylinder body 1 and which does not contact a load giving body 7, thereby preventing deformation by compression caused in incorporation positions of... | 05/25/1999 |
| 5865089 | Linear thruster A linear thruster is disclosed in which a load beam is linearly moved relative to a guide beam by fluid power. One or both of the beams are multisided in cross-section to substantially increase the linear bearing area between the beams and substantially i... | 02/02/1999 |
| 5806405 | Hydraulic servo device for a friction brake in a planetary transmission An hydraulic servo device for a friction brake in a planetary transmission for motor vehicles contains a cylinder with stepped interior wall, a stationary dividing wall that has a hole and divides the interior of the cylinder into two regions, one piston ... | 09/15/1998 |
| 5784920 | Actuator-punch assembly with forming die installation A forming die set has one or more independently operated hydraulic actuator assemblies mounted directly in one of the die shoes to enable a programmed piercing pattern to be carried out at the time the workpiece is formed. Each actuator assembly includes ... | 07/28/1998 |
| 5746110 | Drive cylinder A compact drive cylinder with a cylinder barrel, an end cap and a guide cap is provided. In the cylinder barrel an axially sliding piston is arranged, on which a piston rod is mounted which extends through the guide cap. The piston divides a thrust chambe... | 05/05/1998 |
| 5609091 | Fluid power advancing unit A fluid power operated advancing unit has housing and a plunger adapted to run axially therein. The plunger is designed in the form of a three sided prismatic body at least along its length section running in the housing, said body being guided in the hou... | 03/11/1997 |
| 5564993 | Continously-variable-ratio transmission of the toroidal-race rolling-traction type A roller-control unit for a continuously-variable-ratio transmission of the toroidal-race rolling-traction type, in which the roller carriage (10, 14) is connected by a pivotal joint (30) to the piston (15) of a hydraulic piston-and-cylinder unit (15, 16)... | 10/15/1996 |
| 5547352 | Crankshaft driven reciprocating piston pump having plural guide rods The pump is formed by a body having a cavity with a cylindrical chamber in which a piston is reciprocated toward and away from an inlet and outlet aperture. A crank shaft extends through an aperture formed through the piston transverse to its axis and thr... | 08/20/1996 |
| 5513962 | Pneumatically actuated lubricant pump A pneumatically actuated lubricant pump wherein air is forced into the cylinder through a passage extending longitudinally through the piston rod. The rod is part of a piston assembly reciprocably mounted within a pump housing. The air passage extends fro... | 05/07/1996 |
| 5469774 | Pneumatic actuating drive A pneumatic actuating drive (1, 61) for final control elements comprises a drive housing (6) and a drive component (15) movable therein, to which the drive component (15) is attached a drive element (24) that exits from the drive housing (6) and that can ... | 11/28/1995 |
| 5447095 | Actuator with ring gear and method of manufacturing same A fluid-powered rotary actuator having a body with a cylindrical interior sidewall portion. A drive shaft extends generally coaxially within the body and is supported for rotation relative thereto. The shaft has a grooved, outwardly facing circumferential... | 09/05/1995 |
| 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 |
| 5353682 | Closing and opening means for casting machine A slidably attachable, automated means for opening and closing the die halves of a casting machine. Cylinders are provided having integral vertical side grooves for mounting on said casting machines and the like. The preferred hydraulic cylinder has a hol... | 10/11/1994 |
| 5299489 | Pressure cylinder with low tolerance fit capable of supporting large transverse loads A pressure cylinder in which the piston is hollow and the pressurized fluid is introduced into the hollow of the piston. The cylinder housing includes a core member with supply and exhaust ports. An area between the rear wall of the housing and a rear wal... | 04/05/1994 |
| 5279325 | Pneumatic control drive A pneumatic control drive 1, 51, 71 for control devices, in particular control valves, comprises a drive housing 5 and a drive member 11 displaceable therein and to which is affixed a drive element 18 displaceable together with said drive member 11 to act... | 01/18/1994 |
| 5265331 | Method of manufacturing a piston for an axial piston fluid translating device Hydraulic piston pumps and motors are used in various applications to power implements, steering, propel, and auxiliary systems. However, it is important to keep the piston weight and compressible fluid volume low in order to have a smaller more efficient... | 11/30/1993 |
| 5235899 | Self-contained envelope for vehicular transmission servo control unit This invention is directed to a new and novel envelope for housing a servo mechanism adapted to control a brake assembly used in conjunction with a vehicular transmission. The envelope is adapted to be demountably received within a receptacle provided in ... | 08/17/1993 |
