Class 91/41 - WITH CORRELATED CONTROL OF MOTIVE FLUID AND LOCKING MEANS

Subclass of Class 91 - Motors: expansible chamber type
Definition: Apparatus which includes releasable means for holding a
No. of patents: 38
Last issue date: 05/13/2008

Number	Title	Issue Date
7370570	Fluid pressure cylinder A fluid pressure cylinder can apply a fastening force to an axially movable reciprocating rod. A reciprocating rod 13 is mounted in a case main body 10 so as to be reciprocable in a forward direction and a backward direction, and two lock units 16	05/13/2008
7325710	Pneumatic nail gun A pneumatic nail gun includes a gun body having a cylinder therein; a hitting piston disposed in the cylinder; a main air housing collecting high pressure air; a trigger at one end of the main air housing; a main passage disposed at a peripheral portion of the cylin...	02/05/2008
7317260	Wind flow estimation and tracking using tower dynamics A turbine control system for a variable speed electrical generator in a wind turbine mounted atop a support tower. The wind turbine converts wind energy into a driving torque applied to the generator. The control system includes a turbine support tower position sens...	01/08/2008
7299739	Hydraulic cylinder A fluid pressure cylinder has a piston rod 18 fixed to a piston 26 and projecting outside a cylinder body 23. A lock surface 43 inclining to a radial direction of the piston rod 18 is formed in an engagement member 31 provid...	11/27/2007
7276809	Wind turbine assembly and related method Wind turbine assembly, and related method, is provided that exploits an aerodynamically enhanced wind region of a building in proximity to a parapet of the building. A wind turbine assembly includes a support assembly configured to couple to a building in proximity ...	10/02/2007
7249659	Fluid actuator An actuator responsive to fluid signals to retract and extend a piston. The actuator includes a cylinder and a pressure piston carried inside the cylinder. Also included is a shaft, and a rod connected to the pressure piston. The actuator further includes a first po...	07/31/2007
7243713	Shear/seal ram assembly for a ram-type blowout prevention system An improved shear/seal ram assembly used in ram-type BOPs is disclosed. The disclosed invention is a unique shear/seal ram assembly in which rail seal actuators attached to or integrally formed in a planar surface of one shear blade mate with and slide within corres...	07/17/2007
7131518	Motion control apparatus with backlash reduction A motion controller for use with a rod (10A, 10B, 10C) has a backlash reducer (88A, 88B, 88C) that substantially reduces or eliminates the space created after manufacturing parts with specified tolerance dimensions to substa...	11/07/2006
7108108	Rod clamping device A device for clamping a rod to stop axial and/or rotative movement between the rod and the device. The device includes pressure and clamp units, the clamp unit having a bushing fixed therein and provided with a radially resilient center section normally sized to per...	09/19/2006
7084522	Wind energy unit comprising a hollow shaft for rotor hub and generator In a wind power installation with a (hollow) axis tube member and a hollow shaft mounted thereon for the rotor there is provided only a single bearing which also carries moments, between the axis tube member and the hollow shaft, whereby the parts of the machine whi...	08/01/2006
7017468	Pneumatic pivoting device A pneumatic device for pivoting a pivotal component is articulated to a structural element by means of a joint. Hoses produced from a material of low ductility, to which compressed air can be admitted, are inserted between the pivotal component and the structural el...	03/28/2006
6997365	Contact trip assembly for fastening tool A fastening tool including a housing, a magazine connected to the housing for storing a fastener, a driving mechanism disposed within the housing for driving the fastener into a workpiece, a trigger assembly pivotally attached to the housing for activating the drivi...	02/14/2006
6945156	Device for switching and locking moving points components The invention relates to a device for displacing and locking movable switch parts (1), comprising a hydraulic piston, which is formed by a rod (6) and cooperates, via coupling or locking members (8), with an axially displaceable sleeve (5...	09/20/2005
6940186	Wind turbine having sensor elements mounted on rotor blades The invention relates to a wind power plant with a tower, a rotor having at least one rotor blade being substantially radially distant with respect to a rotor axis and being rotatably supported with respect to a substantially horizontal rotation axis in a portion at...	09/06/2005
6648202	Pneumatic fastening tool A pneumatic fastening tool assembly that employs an engine having a sliding sleeve arrangement to control the supply of air to and exhaust from the pneumatic engine. The sliding sleeve arrangement eliminates the need for a conventional main valve and ther...	11/18/2003
6327957	Wind-driven electric generator apparatus of the downwind type with flexible changeable-pitch blades A wind-driven electric generator of the downwind type has a wind turbine rotor with oppositely disposed flexible blades attached to the hub of a drive shaft by a flexible spar extending from the hub into hollow portions of the blades. The ends of the spar...	12/11/2001
6318237	Arrangement for a lock cylinder for a blocking cylinder The invention relates to an arrangement for a fluid-driven lock cylinder for the actuation of moving parts such as slides, cores and corresponding units on press tools and injection moulding tools for metal or plastic materials. A piston is accommodated i...	11/20/2001
6152268	Rod clamp apparatus A rod clamp device having a rod clamp sleeve with a frusto-conical outer surface and an annular cam with a frusto-conical inner surface and an annular ball guide cage arranged to equalize movement of the bearing balls in circumferentially spaced paths alo...	11/28/2000
6006647	Actuator with free-floating piston for a blowout preventer and the like A method and apparatus for operating a fluid actuated actuator between one and another alternate positions provides different forces for locking and unlocking the actuator. The actuator may use the same fluid pressure to operate a primary piston within a ...	12/28/1999
5794505	Positioning drive, in particular for a machine tool A positioning drive having a hydraulic motor with a cam disc which is rotatable with a motor shaft and has a cam, a control valve which, with the hydraulic motor forms a unit with a housing and has a valve piston which is displaceable between several posi...	08/18/1998
5761984	Braking device for a fluid power actuator A fluid pressure operated braking device for a piston rod. The braking device includes a clamp sleeve and a cam member spring biased axially in a direction to actuate the clamp sleeve to a clamp condition, and a fluid pressure operator that provides a hyd...	06/09/1998
5609020	Thrust reverser synchronization shaft lock A thrust reverser synchronization shaft lock system that includes a sync lock control valve (50) and two hydraulically controlled sync locks (60) attached to the synchronization shafts (5) of a jet engine thrust reverser system, is disclosed. The thrust r...	03/11/1997
5540135	Device for clamping an axially movable rod A device for clamping an axially movable rod comprising a housing having a cylindrical inner wall and end walls that slidably support the rod. A pair of annular rod clamp rings in the housing having inner clamping surfaces for engaging the rod and frusto-...	07/30/1996
5365828	Pneumatic linear drive comprising a locking mechanism for end positions A linear drive is disclosed comprising a single-acting pneumatic piston cylinder unit, at least one spring which acts against the pneumatic force and loads the piston rod in the direction of one end position, and one form-locking pneumatic locking mechani...	11/22/1994
5349894	Locking hydraulic actuator A method for locking a hydraulic actuator in a predetermined position and a locking hydraulic actuator are provided. The method includes the steps of supplying hydraulic fluid to a forward chamber in the hydraulic actuator, transferring the hydraulic flui...	09/27/1994
5199344	Lock cylinder for backhoe slide frame A lock cylinder for a backhoe slide frame which provides for a positive lock of the slide frame in selected positions is described. The slide frame is supported on two generally horizontal rails that are vertically spaced, and the lock cylinders mount bet...	04/06/1993
5193431	Device for operation of a sliding door member A device for operation of a sliding door member, the device being movable between an open position in which the door member is open and a closed position in which the door member is closed. The device includes a pneumatic cylinder having an actuating pist...	03/16/1993
5181450	Pneumatic fastener driving apparatus with piston holding detent A pneumatic operated fastener driving device having an improved piston, which together with the cylinder form an elastic interference fit connection so that the piston is held from movement until a sufficient air pressure is applied to the piston. The pis...	01/26/1993
5140904	Piston sealing arrangement for pressure-fluid-operated systems A piston sealing arrangement for pressure-fluid-operated systems is disposed in an annular recess of a piston (5) or an associated housing (4) and is composed of a sealing ring element (1A, 1B) as well as an elastic element (2, 3) acting on one side in op...	08/25/1992
5050484	Hydraulic actuator with locking mechanism A hydraulic actuator comprising a cylinder formed with an axial cylinder chamber, a main piston provided in the cylinder chamber and dividing the chamber into a first chamber and a second chamber and further formed with a locking chamber, an annular locki...	09/24/1991
4812612	Hydraulic lock for resistance welders A hydraulic system for use in a resistance welding machine with a stationary electrode and a variable electrode to provide adjustment of the stationary electrode to ensure proper positioning to maintain weld quality. The hydraulic system comprising an act...	03/14/1989
4781102	Locking, bearing and actuating apparatus The apparatus comprise a generally tubular outer element, a generally cylindrical inner element disposed therewithin and sized relative thereto to provide a generally annular operating space therebetween. An intermediate element is disposed in said operat...	11/01/1988
4724741	Hydraulic spring-loader cylinder with wear adjustment Spring-loaded cylinder with a tension piston (7) which can be pressurized by a pressure medium. Between the tension piston (7) and a piston rod (3) movable thereby, a cylinder-piston arrangement (19, 20, 21) is installed, whose cylinder chamber (21) can b...	02/16/1988
4534269	Locking, bearing and actuating apparatus The apparatus comprise a generally tubular outer element, a generally cylindrical inner element disposed therewithin and sized relative thereto to provide a generally annular operating space therebetween. An intermediate element is disposed in said operat...	08/13/1985
4509407	Hydraulic control valve with maintenance-facilitating feature The control valve for an hydraulic actuator is provided with a particular operating state for venting the hydraulic system, which state is attainable positively whenever the hydraulic pressure is inadequate, e.g., in the case of venting or presence of air...	04/09/1985
4311086	System for damping abrupt movement of a punch press ram A system for damping abrupt movement of a punch press ram at the moment of cut-breakthrough with the use of at least two damping pistons disposed within cylinders and arranged to engage the press ram before and during cut-breakthrough. The cylinders withi...	01/19/1982
4214795	Piston braking device for hydraulic or pneumatic cylinders A piston braking device for a hydraulic or pneumatic cylinder, employing an annular braking plate loosely fitted on the piston rod of the cylinder and rockable into a tilted position relative to the piston rod upon actuation by a plate drive means, and a ...	07/29/1980
4126082	Travel-brake control system A hydraulic control system for use with a vehicle having an earthworking implement and having a plurality of components operated by hydraulic motor means having hydraulic release type brakes associated therewith and including means responsive to actuation...	11/21/1978

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Class 91/41 - WITH CORRELATED CONTROL OF MOTIVE FLUID AND LOCKING MEANS