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| Number | Title | Issue Date |
| 7789013 | Variable focus optical devices Variable focus optical devices, in particular lenses, can include a cavity at least partially defined by a flexible member (2), which may be retained between engaging portions of a frame member (8) and a ring member (12), such that a peripheral ... | 09/07/2010 |
| 7690293 | Coupling system for use with fluid displacement apparatus A magnetic coupling system may be used in a fluid displacement apparatus to magnetically couple a drive shaft to a piston. The magnetic coupling system may include first and second magnetic couplers at the ends of the drive shaft and piston, respectively. The second... | 04/06/2010 |
| 7591216 | Fluid powered dual-piston actuator with efficient fluid porting and method of implementation In an actuator, a first piston is attached to a first toothed rack, and a second piston is attached to a second toothed rack. A rotary member is attached to one pinion mating with the first or second toothed racks. A first volume is disposed in the cavity on one sid... | 09/22/2009 |
| 7574953 | Rotary clamp cylinder According to a rotary clamp cylinder of this invention, in a rod cover 5, attachment holes 18 are formed so as not to intersect an axis CL of a piston rod 11, and pin members 19 are rotatably fitted in the attachment holes 18, resp... | 08/18/2009 |
| 7472640 | Pneumatic rotary actuator A pneumatic control rotary actuator that incorporates a control piston of a rack toothing engaging with a pinion to cause it to rotate together with an item holder device; the pinion has toothing made up of several parallel pins (23) spaced at an angle, posit... | 01/06/2009 |
| 7363848 | Rotating or pivoting device and connection module for a rotating or pivoting device The invention relates to a rotating or pivoting device (110) comprising a housing (12), at least one working piston (14) which is mounted in the housing and subjected to a pressure medium, and a pivoting part (20) which is rotatably mount... | 04/29/2008 |
| 7357066 | Sealing structure of an up-down type piston assembly for exhausting a content The disclosed sealing structure is used with a piston assembly which exhausts a content. A sealing washer has a sealing hole through which a screw pillar is inserted and is configured to be formed between a piston and a screw cap of the piston assembly. The sealing ... | 04/15/2008 |
| 7311035 | Subsea hydraulic junction plate actuator with R.O.V. mechanical override The invention relates to the field of offshore subsea oil and gas drilling and production operations. Specifically the invention relates to a hydraulically and/or mechanically driven junction plate actuator suitable for use in connecting and/or disconnecting a dynam... | 12/25/2007 |
| 7293967 | Pump apparatus A constant rate discharge pump comprises a rotary shaft which is rotatable together with a rotary driving source, a piston which is displaceable in an axial direction in a pump chamber of a body by the rotation of the rotary shaft and which has a tapered surface hav... | 11/13/2007 |
| 7290480 | Swing cylinder A swing cylinder having a body and an end cap on each end of the body. The cylinder also has a piston arranged within the body. The cylinder has a rod engaged with the piston and has an arm attached to one end thereof. A guide is arranged on the opposite end of the ... | 11/06/2007 |
| 7287458 | Yoke mechanism for compressor A yoke structure for a compressor is disclosed, which is applied to a scotch yoke type reciprocating compressor. The yoke structure comprises a crankshaft (10); a crankpin (20) connected to the crankshaft (10), to rotate along a predetermined ro... | 10/30/2007 |
| 7267044 | Compact actuator with large thrust A manually and/or fluid-pressure operated rotary actuator is coupled with a power screw in a compact assembly to produce large linear thrust. The actuator is operated in both directions by fluid pressure or in one direction by fluid pressure and in the other by spri... | 09/11/2007 |
| 7213504 | Hydraulic actuator This invention is a bi-directional hydraulic actuator comprising a piston assembly positioned within a housing. The piston assembly is configured to move linearly within the housing. A gland is operatively connected to the piston assembly. The gland is configured as... | 05/08/2007 |
| 7210720 | Timed rotation tool assembly and actuator A fluid-powered tool assembly having first and second tool members, a body, and first and second rotatable shafts. The first shaft is attached to the first tool member for rotation therewith about a first axis, and the second shaft is attached to the second tool mem... | 05/01/2007 |
| 7201133 | Internal combustion engine having dual piston cylinders and linear drive arrangement A device for transforming an alternating motion of a piston into a circular motion of a shaft is provided. The device includes an assembly of two pistons connected by two racks alternatively in mesh with a toothed cam set on a shaft. Movement in one direction of the... | 04/10/2007 |
| 7168664 | Assist rod and basket assembly A railroad switch assembly comprises a basket that directly actuates a torsional assist rod. The basket is located at a lower elevation than the assist rod, preferably in a hollow tie and preferably between the switch machine and the running rail. ... | 01/30/2007 |
| 7100493 | Pneumatic actuator A pneumatic actuator includes a cylinder, an output shaft disposed rotatably in the cylinder, a pinion disposed in the output shaft, a piston rod furnished with rack teeth to be meshed with the pinion, and pistons disposed one each at opposite ends of the piston rod... | 09/05/2006 |
| 7051642 | Liquid container The liquid container includes a body for having a tank portion housing a liquid, and having a supply port on a tip end side, a piston for moving forward inside the tank portion, a piston rod connected with the piston and extending rearward, a manipulating cylinder r... | 05/30/2006 |
| 7044261 | Power steering motor having a noise dampening piston assembly An apparatus (10) for turning steerable wheels of a vehicle comprises a housing (14) that defines a fluid chamber (24). A rack bar (26) extends longitudinally through the housing (14) and is connectable with the steerable wheels of... | 05/16/2006 |
| 7044048 | Drive unit for a motor vehicle axle stabilizer A drive unit is provided for the coaxial twisting movement of two stabilizer halves of a motor vehicle axle stabilizer with a tubular housing. Two housing halves are provided having an interior of which a hydraulically movable actuating piston is arranged displaceab... | 05/16/2006 |
| 7036624 | Power steering system A power steering system includes a first R-shaped portion formed with a cylindrical wall and curvedly extending from an outer-periphery general face of the cylindrical wall to the outer periphery of a butt wall, and a second R-shaped portion formed with the cylindri... | 05/02/2006 |
| 7028602 | Linear, hydraulic pivot drive The invention relates to a linear, hydraulic pivot drive, especially for the flap control system of aerodynamic structures. Said pivot drive comprises a housing provided with ports for introducing a hydraulic medium, a piston which is arranged inside the housing and... | 04/18/2006 |
| 7021196 | Steering rack The present invention comprises an improved steering rack in which sliding sleeves within the main cylinder allow a channel to be cut through the main cylinder to allow for passage of the stationary piston attachment pin without allowing hydraulic fluid to leak thro... | 04/04/2006 |
| 6910409 | Oscillating actuator A rack and pinion type oscillating actuator includes a pair of parallel sliding holes formed in a body, rack members having racks slidably fitted in the pair of sliding holes, respectively, an output shaft having a pinion engaged with the racks is rotatably supporte... | 06/28/2005 |
| 6776083 | Membrane actuator The present invention relates to a diaphragm actuator for control valves, wherein the gear rack is arranged so that the points of contact of the gear rack/gear wheel system are situated on the straight line connecting the centers of the movable walls of the pressure... | 08/17/2004 |
| 6749408 | Piston pump A piston pump assembly having a single drive gear assembly associated with two adjacent pump cylinders. Each pump cylinder has a separate valve unit associated therewith. The two pump cylinders have a common piston rod having a pump piston arranged at each end. The ... | 06/15/2004 |
| 6708489 | Pneumatic actuator A double-acting, piston driven actuator for providing a double action rotary powered output, having a stepped bore housing a double acting piston having a larger diameter end and a smaller diameter end therein; a three way valve selectively to supply pressurized flu... | 03/23/2004 |
| 6679057 | Variable geometry turbocharger A turbocharger comprises a center housing, and a shaft positioned therein having a first end and a second end. A turbine housing is attached to one side of the center housing and has a turbine wheel disposed therein that is coupled to the first end of the... | 01/20/2004 |
| 6668988 | Buffering mechanism A buffering mechanism comprises a block member which is installed detachably in an actuator body, a piston which compresses air in a compressing chamber when a movable element abuts against the piston, and a check valve and a variable throttle valve which... | 12/30/2003 |
| 6666129 | Operating device for a rotatable closing element of a valve The invention relates to an operating device for a rotatable closing element of a valve such that, a desired angle of rotation can easily be set and maintained. This is achieved in that two guide grooves (2f), which are incorporated diametrically opposite... | 12/23/2003 |
| 6640689 | Double-rack-and-pinion swinging apparatus In air flow paths of a swinging apparatus in which racks are respectively provided to pistons of a pair for swinging in cylinder bores of a pair disposed in parallel in a casing, a pinion is engaged with the racks, and the pistons of the pair are synchron... | 11/04/2003 |
| 6637314 | Actuator An air is evacuated from a chamber of a bellows by a vacuum pressure supply source connected to a vacuum port of an attachment plate. The vacuum pressure in a vacuum chamber is thus balanced with the vacuum pressure in the chamber of the bellows. Conseque... | 10/28/2003 |
| 6626055 | Rack and pinion type swing actuator A rack and a pinion respectively have stoppers constituted by a flat surface in both sides of tooth portions thereof. The stopper of the pinion is brought into contact with the stopper of the rack at both oscillating stroke ends of the rack, whereby a bac... | 09/30/2003 |
| 6510780 | Ball screw driven pump A reversibly actuatable fluid hydraulic pump is described for use in a hydraulically driven elevator. The pump comprises a cylinder and a piston linearly actuatable within the cylinder by a ball screw race disposed over a spindle and connected to the pist... | 01/28/2003 |
| 6453795 | Locking mechanism for a spring-actuated device A spring-actuated output drive device is used for example in medical aerosol therapy for a miniaturised high-pressure producing device for atomising a small dose of a liquid medicament. A locking-stressing-mechanism for such an output d rive device is to ... | 09/24/2002 |
| 6446436 | Master cylinder for use in power trains of motor vehicles A master cylinder for use in the power train of a motor vehicle to actuate the brakes or the friction clutch is designed to avoid the generation of screeching noise and/or the transmission of stray movements to the piston rod in response to shifting of th... | 09/10/2002 |
| 6439104 | Small size air pump The present invention aims at providing a small size air pump which has a simple structure and is less likely to incur restrictions on its space for installation and accommodation. The present invention provides a small size air pump 1 in which a motor 4 ... | 08/27/2002 |
| 6431048 | Combination actuator with speed variable mechanism An output shaft is connected to a piston rod of a fluid pressure-driven linear cylinder through a converting mechanism for converting linear thrust of the piston rod into rotational torque and converting operation of the converting mechanism is controlled... | 08/13/2002 |
| 6397722 | Variable torque accommodating, pressure fluid driven, transmissionless engine A pressure fluid driven piston and cylinder engine capable of providing high torque output at any engine speed for direct connection to a vehicle or machine to be driven. The engine may be used for any purpose, but is especially advantageous for powering ... | 06/04/2002 |
| 6363833 | Piston for hydraulic power assist rack and pinion steering system A hydraulic power assist steering system (10) for a vehicle having steerable wheels comprises a housing (14) and a rack (16). The system also comprises a fluid motor (20) for moving the rack (16). The fluid motor (20) includes a piston (10) fixedly connec... | 04/02/2002 |
