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| Number | Title | Issue Date |
| 7578228 | Air balance structure An air balance structure that compensates for the weight load of a movable member driven in a straight line along the vertical axis, with a simplified structure and at reduced cost. The box-shaped movable member has an open bottom that accommodates the stationary me... | 08/25/2009 |
| 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 |
| 7302882 | Jump force vacuum booster The invention provides a method and apparatus wherein the apparatus includes a housing having a first end and a second end. The housing also includes a first aperture and a second aperture. The first aperture is positioned to communicate with a first fluid source at... | 12/04/2007 |
| 7267198 | Portable electric grease gun This invention discloses a portable electrical grease gun which relates to electric tool field. The portable electrical grease gun according to the present invention, in which conventional slide block assembly driving structure is replaced by a crank link mechanism.... | 09/11/2007 |
| 7156189 | Self mountable and extractable ultrasonic/sonic anchor Self drilling anchors and related methods and apparatus. In one embodiment an apparatus comprises a drill bit, a hammer mechanism for hammering the drill bit in a first direction and in a second direction, and a selection mechanism for controlling whether, at a give... | 01/02/2007 |
| 7040217 | Tie rod for a brake booster A first and second tie rods locating between a front shell and a rear shell of a brake booster through which a master cylinder is connected to a support member. Each of the first and second tie rods have a head that engages the rear shell and a first shaft that exte... | 05/09/2006 |
| 7004357 | Grease gun An apparatus converts rotary motion of a motor drive shaft into oscillatory motion of a work piece, for example, in a power tool. The apparatus comprises a planetary gear assembly connected to the motor for rotating an output gear. The output gear meshes with a driv... | 02/28/2006 |
| 6928917 | Control valve A valve arrangement for controlling the flow of pressurized fluid between a working chamber and an outlet chamber that passes between a seal and a seat surrounding an orifice to the outlet chamber. Fluid flowing through the orifice produces a first turbulence produc... | 08/16/2005 |
| 6745664 | Paint shaker and motor therefor A paint shaker and motor therefor. A yoke has at a first end a clamp for clamping a paint can and at a second end, is pivotally connected to a linkage assembly that converts the linear motion of a reciprocating linear motor to an arcing motion of the yoke. The motor... | 06/08/2004 |
| 6170381 | Control valve seal A fluid power apparatus having a housing with a bore therein which is divided by a power piston into an inlet chamber and an outlet chamber. The power piston has a passageway for connecting the inlet chamber with an outlet chamber. A valve arrangement con... | 01/09/2001 |
| 5471022 | Pneumatic acutated switch A diaphragm assembly for movement in response to a pressure increase exerted thereon comprised of a resilient flexible diaphragm having a first surface with a predetermined profile when said diaphragm is in a neutral, unflexed condition, the diaphragm hav... | 11/28/1995 |
| 5115717 | Ramming apparatus A ramming apparatus having a shortened length without sacrificing ramming power requirements is disclosed comprising a housing having a front end and a rear end, a pneumatically driven percussion piston having a front end and a rear end operatively mounte... | 05/26/1992 |
| 5102303 | Hydraulic ram A hydraulic ram includes a water inlet conduit, a draining conduit with a main clapper valve and a bell or cup valve. The bell or cup valve communicates with the chamber through a plurality of individual clapper arranged parallel to one another. Each of t... | 04/07/1992 |
| 5035580 | Bypass mode control for high pressure washing system A pressure washing system is disclosed which consists of a hydraulic pump driven by a variable speed internal combustion engine, a nozzle gun connected to the pump outlet, an unloader valve that senses the demand state of the nozzle gun for delivering wat... | 07/30/1991 |
| 5029514 | Nozzle hydraulic actuator ring with cooling flow A hydraulic actuator system, for use in an aircraft, and in which the servo fluid supply to the system is used to provide for the operation and cooling of the system. The system comprises a hydraulically operated piston mechanism including at least one hy... | 07/09/1991 |
| 4958495 | Hydraulic differential cylinder A hydraulic differential cylinder comprises a cylinder, a piston slidably fitted in a cylinder chamber, a piston rod with one end coupled to said piston and an inner valve disposed in said piston rod. The cylinder chamber is divided by the piston into a r... | 09/25/1990 |
| 4941342 | Multi-ram forging assembly A multi-ram forging assembly has a piston-cylinder unit for driving each ram carrying a forging tool wherein at least two diametrically opposed forging unit simultaneously act on a workpiece. Each piston-cylinder unit comprises a pressurized inlet chamber... | 07/17/1990 |
| 4907492 | Apertured valve disposed in hollow piston rod of follower-type motor A piston is moveably arranged in a cylindrical bore of a housing and the piston rod extends through one end of the housing for connection to a unit to be controlled. A very high variable control rate of the piston is made possible by a control slide valve... | 03/13/1990 |
| 4870889 | Hydraulic device for fuel pumping apparatus A hydraulic device includes a piston slidable within a cylinder. Fluid under pressure is admitted to one end of the cylinder through an inlet which contains a restrictor. The piston is formed with an orifice and is biased by a first spring towards the one... | 10/03/1989 |
| 4823677 | Brake power assist servomotor A cylindrical casing accommodates an operator pistion and a power piston separated by a fixed barrier which serves to define with the former a reservoir and with the latter a power chamber. A piston rod affixed to the operator piston extends through the b... | 04/25/1989 |
| 4803415 | Stepper motor control circuit and apparatus The present invention relates to a motor control circuit for a stepper motor which causes a motor shaft to oscillate between an incremental rotational position nearest above and nearest below a commanded average rotational position identified by an electr... | 02/07/1989 |
| 4798125 | Pneumatic type of hydraulic structure This invention pertains to a pneumatic mode under which the structure of a hydraulic system is driven, particularly denoting the pneumatic mode under which a mini air compressor is being used as a means to elevate a hydraulic jack. This invention makes us... | 01/17/1989 |
| 4779843 | Jack with drain valve A jack with drain valve including a housing having a first cylinder and a first piston; the first piston defining a second cylinder into which a second piston is reciprocally mounted. A drainage tube is defined by the first piston, the drainage tube exten... | 10/25/1988 |
| 4541324 | Vacuum actuator with fail-safe system A vacuum responsive switch for detecting a failure in creation of a control vacuum within the control diaphragm chamber. A solenoid valve is provided which functions to equalize pressure within one of a power diaphragm chamber and a leak chamber with the ... | 09/17/1985 |
| 4539891 | Servo booster mechanism A servo booster mechanism (18) having a piston (48) responsive to movement of a plunger (84) by an input signal for controlling the rate of fluid flow past a seat (82) into a passage (80) for distribution to the surrounding environment. A first restrictor... | 09/10/1985 |
| 4426913 | Rolling diaphragm vacuum motor This invention relates to an automatic temperature control system for automobiles and improved components thereof. The control system operates on the proportional stroke principle and comprises an in-car air sensing tube biased with ambient air; a sensor ... | 01/24/1984 |
| 4388856 | Idle speed control actuator An idle control valve (10) for adjusting the idle position of a vehicle throttle lever includes a housing (12) having a pair of diaphragm assemblies (18, 20) which divide the housing into three chambers (22, 24, 26). The chamber (26) defined between the d... | 06/21/1983 |
| 4373424 | Hydraulic booster A hydraulic system in which pressurized fluid fed from a hydraulic pump is distributed through a distributor valve, on one part to a hydraulic booster for a brake and on the other part to a power steering unit or other hydraulic device. The distributor va... | 02/15/1983 |
| 4366742 | Hydraulic force multiplying device A hydraulic force multiplying device comprising a main body having inlet and outlet ports, input and output rods with one ends thereof being slidably connected with one another in the main body, an annular piston slidably engaging with the inner circumfer... | 01/04/1983 |
| 4337686 | Hydraulic force multiplying device A hydraulic force multiplying device has a housing having an inlet port connected to a source of hydraulic pressure and an outlet port, an input rod and an output rod, one end of each of the input and output rod being slidably connected with one another w... | 07/06/1982 |
| 4305568 | Vibration damping mechanism for hydraulic booster A vibration damping mechanism for a hydraulic booster including a manually operated pedal which includes a hydraulic booster body, a control valve mechanism disposed within the body, an input member slidably disposed within the body and operably connected... | 12/15/1981 |
| 4290340 | Hydraulic booster A hydraulic booster including a housing provided with an inlet hydraulically connected to a pump, a drain port hydraulically connected to a reservoir and a cylindrical bore, a power piston sealingly and slidably disposed within the bore and dividing the c... | 09/22/1981 |
| 4274326 | Hydraulic booster with back pressure control A hydraulic power brake system in which a hydraulic power brake booster has one or more back pressure control valves to produce a restriction downstream of the booster control valve after the booster has been actuated to build up some booster power pressu... | 06/23/1981 |
| 4270438 | Servo boosters for vehicle braking systems In order to reduce the distortion of a servo booster bousing in use the booster is provided with one or more ties which extend through the movable wall for transmitting reaction forces directly from the master cylinder housing to the vehicle bulkhead. Thi... | 06/02/1981 |
| 4248135 | Hydraulic ratio changing booster A hydraulic power booster system in which a hydraulic power brake booster has hydraulic ratio changing mechanisms. The ratio is established by trapping hydraulic fluid in a chamber with an input piston having a larger effective area than an output piston ... | 02/03/1981 |
| 4245547 | Rotary to linear servo mechanisms A rotary to linear servo mechanism for converting low force mechanical rotary motion into hydraulic motion is provided which includes a piston linearly movable in one end of a bore and a valve rotatably mounted in the other end of the bore for cooperation... | 01/20/1981 |
| 4241642 | Hydraulic ratio changing booster with self-venting chamber A hydraulic power booster system in which a hydraulic power brake booster has a hydraulic ratio changing mechanism. The ratio is established by trapping hydraulic fluid in a chamber with an input piston having a larger effective area than an output piston... | 12/30/1980 |
| 4230018 | Hydraulic booster with accumulator control A hydraulic power brake system in which a hydraulic power brake booster has an accumulator operable when there is insufficient power to operate the power brake with hydraulic pressure. The accumulator control valve is actuated by a cylindrical cam normall... | 10/28/1980 |
| 4216701 | Swing type hydraulic servo-actuator A hydraulic servo-actuator has a casing embracing therein a hydraulic fluid chamber which is divided into two hydraulic drive chambers by a vane projecting from a first shaft. To each of the divided chambers are connected an oil feeding passage provided w... | 08/12/1980 |
| 4181064 | Hydraulic brake booster The brake booster is connected in the hydraulic circuit containing the vehicle's power steering system. It is placed downstream of the power steering gear. A multi-functional accumulator/relief valve is provided. This valve functions as the flow restricti... | 01/01/1980 |
