Abstract: When pressurized fluid is not supplied into or discharged from the first channel 28a of the piston rod 28, that is, when the first channel 28a is isolated from the outside, the cylinder tube 22 is in a stopped state. At this time, fluid inside the first cylinder chamber 36a is compressed, and the pressure is increased accordingly to match the sum of the weights of the cylinder tube 22, the table 18, and the workpiece W.

Abstract: A fluid actuator arrangement comprises a first cylinder housing including a first head member and a second head member; a first piston body is slidable arranged in said first cylinder housing; the first piston body divides the first cylinder housing interior into a first cylinder chamber and a second cylinder chamber, at least the first cylinder chamber is coupled to a fluid supply. The first piston body exhibits a first through-bore and a second through-bore that extend through the first piston body in an axial direction; a first piston rod is arranged slidable in the first through-bore and a second piston rod is arranged slidable in the second through-bore; and the first through-bore comprises a first engagement and disengagement device and the second through-bore comprises a second engagement and disengagement device, which are arranged for providing individual engagement or disengagement to or from the respective first and second piston rod.

Abstract: A fluid actuator includes housing defining a cylinder bore and first and second fluid passages. A circumferential detent groove extends into the housing from the cylinder bore. The cylinder bore receives a piston having a top face and a skirt in sliding engagement. A circumferential detent ring groove extends radially inwardly into the skirt. The detent ring groove has a first portion of a first depth and a second portion of a second, greater depth. An o-ring is at least partially received in the second portion. A wear ring is at least partially received in the first portion and overlies the o-ring. The o-ring biases the wear ring outwardly of the detent ring so that the wear ring may be selectively engaged with the detent groove.

Abstract: The present invention relates to a trim actuator actuating system having two separate hydraulic power supply systems, through which it is possible for the first time to use a hydraulic linear actuator as a trimmable horizontal stabilizer actuator in an aircraft. The at least one hydraulic linear actuator is coupled to the first power supply system in such a way that it applies hydraulic power to the linear actuator during normal operation. In order to ensure the application of pressure to the hydraulic linear actuator in case of breakdown, in such a case, the pressure application to the hydraulic linear actuator is maintained with the aid of the second hydraulic power supply system.

Abstract: A locking piston assembly (100) is provided according to the invention. The locking piston assembly (100) includes a piston chamber (107), a piston rod (106) configured to be substantially extended from and substantially retracted into the piston chamber (107), and a piston head (108) coupled to the piston rod (106) and configured to move reciprocally in the piston chamber (107). The locking piston assembly (100) further includes at least one lock (120) configured to mechanically lock the piston head (108) and the piston rod (106) in at least a substantially fully extended position. The lock (120) is configured to unlock the piston head (108) and the piston rod (106) in a presence of a pressurized fluid provided to retract the piston rod ( 106). The pressurized fluid is introduced into the piston chamber (107) and the piston rod (106) is retracted only after the lock (120) is unlocked.

Abstract: The invention pertains to a piston-cylinder unit for a hinged lid, especially a motor vehicle hinged lid, with a closed first end, a cylinder, a piston installed in the cylinder with freedom to slide back and forth, the piston dividing the cylinder into a working chamber remote from the first end and a second working near the first end; and a piston rod, which is attached to one side of the piston, projects through the first working chamber, and passes out of the cylinder concentrically to the central longitudinal axis of the cylinder through a guide and sealing device at the second end opposite the first end, where a first locking element is provided on the piston rod, and a second locking element is provided on the cylinder to establish a mechanical interlock, and where one of the locking elements comprises a sleeve, which cooperates with the other locking element to establish an interlock.

Abstract: The invention relates to a clamping device for a rod which moves in an axial translatory or rotating manner. Said clamping device comprises a housing, a clamping sleeve which is axially fixed therein, a tensioning piston which can be displaced in the housing embodied as a cylinder, and a spring device for pre-tensioning the piston in the direction of the clamping sleeve in the locking state. Said spring device includes at least one helical plate spring which, in the event of a fracture, maintains the holding force and the dynamic course of the same. In one embodiment, the at least one helical plate spring is coaxially arranged in relation to the rod. In another embodiment, a plurality of helical plate springs are arranged on the circumference of the rod such that they are parallel with the axis thereof, for distribution of a pre-tensioning force acting on the spring device.

Abstract: The invention relates to a clamping device for a rod which moves in an axial translatory or rotating manner. Said clamping device comprises a housing, a clamping sleeve which is axially fixed therein, a tensioning piston which can be displaced in the housing embodied as a cylinder, and a spring device for pre-tensioning the piston in the direction of the clamping sleeve in the locking state. Said spring device includes at least one helical plate spring which, in the event of a fracture, maintains the holding force and the dynamic course of the same. In one embodiment, the at least one helical plate spring is coaxially arranged in relation to the rod. In another embodiment, a plurality of helical plate springs are arranged on the circumference of the rod such that they are parallel with the axis thereof, for distribution of a pre-tensioning force acting on the spring device.

Abstract: A vane type hydraulic rotary actuator incorporates a fail-safe brake for preventing movement of the device's rotor relative to a housing in which the rotor is journaled. The brake has a spring-biased piston that is forced to a locked condition whenever applied hydraulic operating pressure acting on the vane falls below a predefined limit. The rotary actuator also incorporates an improved sealing arrangement that prevents egress of hydraulic fluid from a high pressure chamber on one side of the vane to a low pressure chamber on the opposite side of the vane.

Abstract: The invention relates to a locking device for linear actuators, in particular for fluid-actuated adjusting devices, with a piston rod mounted in an axially displaceable manner relative to a receiving device. The object of the invention is to provide a locking device for linear actuators, with which a secure locking is possible over the entire travel path of the linear actuators. This is attained in that the piston rod has a hollow space extending in the axial direction, in which form-fitting devices are arranged distributed in the axial direction, that form-fitting elements corresponding to the form-fitting devices are arranged in the piston rod in a radially displaceable manner, which elements are mounted in an axially stationary manner relative to the receiving device, and that an actuating device that displaces the form-fitting elements radially is assigned to the form-fitting elements.

Abstract: A sound is picked up using a plurality of microphones that are arranged so that respective directivity axes of the microphones differ from each other or so that they function as a plurality of microphones having directivities in different directions by performing a calculation on sound signals output from the plurality of microphones. Rotation of the plurality of microphones is detected, and the sound signals output from the plurality of microphones are processed according to the detected rotation so that a change in orientation of each of the microphones is canceled. The processed output sound signals are output to a reproduction side.

Abstract: A vane type hydraulic rotary actuator incorporates a fail-safe brake for preventing movement of the device's rotor relative to a housing in which the rotor is journaled. The brake has a spring-biased piston that is forced to a locked condition whenever applied hydraulic operating pressure acting on the vane falls below a predefined limit. The rotary actuator also incorporates an improved sealing arrangement that prevents egress of hydraulic fluid from a high pressure chamber on one side of the vane to a low pressure chamber on the opposite side of the vane.

Abstract: A clamping sleeve is of generally cylindrical shape with a hollow interior and comprises an upper crown, a lower crown, and a tubular sidewall. The upper crown is positioned at an upper end of the clamping sleeve. The lower crown is positioned at a lower end of the clamping sleeve. The tubular sidewall is positioned between the upper and lower crown and includes one or more corrugations that utilize spring like principles such that pressure applied to the external surface of the tubular sidewall circumferentially flexes the clamping sleeve in order to reduce the diameter of the clamping sleeve and apply a clamping force to an object within the clamping sleeve. The clamping sleeve may be utilized in a work support that includes a plunger positioned within the clamping sleeve, wherein a pressurized flowable medium provides pressure to the exterior of the tubular sidewall thereby causing the clamping sleeve to apply a clamping force to the plunger.

Abstract: A slight-vibration-suppressing mechanism is attached to a piston rod 6 of an air pressure cylinder that stops the piston at a target position by means of a positioning control. The slight-vibration-suppressing mechanism includes a friction member formed of a pair of sealing members being in contact with the piston rod, and an air cell of compressed air fed to a periphery of the piston rod is formed by means of the friction member. An air flow path to feed and discharge the compressed air to the aforementioned air cell is formed, in which the compressed air generates a sliding friction, which suppresses slight vibration, via the friction member between the piston rod and the aforementioned friction member.

Abstract: A hydrostatic slewing drive suitable for use in construction equipment, in particular excavators, has a pinion shaft that is rotationally mounted in a housing. A slewing pinion is connected to the pinion shaft. An axial piston motor that utilizes a swashplate construction is in the housing and has a rotating cylinder block with borings and pistons located in the boring. The cylinder block is in one piece with, or integral with, the pinion shaft. The axial piston motor preferably has a constant flow volume, whereby the swashplate is shaped on a housing component. The pistons are supported by slippers on the swashplate which is provided with hydraulic fluid supply channels to which borings in the slippers and in the piston can be connected. The slewing piston can be detachably fastened to the pinion shaft/cylinder block. There is also a brake that can be actively connected with the pinion shaft/cylinder block.

Abstract: A method and apparatus for billing connections of a subscriber identified by a SIM card in a telecommunications network to the subscriber user, including determining the duration and time of the connection using a time-measuring device integrated into the SIM card, which is synchronized with an external clock signal, and determining the amount to be charged based upon connection duration and time and at least one remotely loadable tariff table stored in the SIM card. The time-measuring device can be checked by a time server in the infrastructure, and, if necessary, can be adjusted. The method and apparatus can be used for prepaid as well as for post-paid cards. All data for determining the amount to be charged are available on the SIM card, allowing billing to take place at the source, at the user. No other billing system is required in the infrastructure.

Abstract: A control system has an HHC actuator having a basal portion and a movable portion. A load acting on the control system is detected by a semiconductor gauge. The load detected by the semiconductor gauge is compared with a threshold value in a computer. If the detected load is larger than the threshold load, the movable portion is fixed to the basal portion by a fixing mechanism. By detecting the sign of stall of blades, the HHC actuator is fixed in a neutral position, allowing safe flight. A fixing switch is provided for allowing the fixing mechanism to operate regardless of the result of the comparison with the computer.

Abstract: A coupling mechanism, comprising a relatively fixed member and a relatively moveable member, is configured such that said moveable member may be securely connected in a locked position with said relatively fixed member by remote control of a shiftable member mounted on said relatively moveable member, and which shiftable member may be moved by remote control, into a position allowing disconnection, when desired.

Abstract: An air damper utilizing only recirculating internal air for dampening in one direction of movement an openable object includes inner and outer cylinder members, primary and secondary shafts, first and second controllable orifice structures, primary and secondary end caps, and primary and secondary compression springs. The first controllable orifice structure restrains the flow of air from a first shaft chamber to the first head chamber to pass only through a first orifice in accordance with the movement of the primary shaft in a first axial direction. The second controllable orifice structure restrains the flow of air from a second shaft chamber to a second head chamber to pass only through a second orifice in accordance with the movement of the secondary shaft in the first axial direction.

Abstract: An actuator including a cylinder having a longitudinal bore, a piston slidably and sealingly inserted into the cylinder, and a lock mechanism for temporarily locking the piston, the cylinder including a cylinder body having the longitudinal bore, a cylinder formed at a front end of the cylinder body and accommodating the lock mechanism, and a front wall connected to the cylinder head at a position opposite to the front end of the cylinder body and having a hole formed therein, the piston including a piston head slidably and sealingly inserted into the cylinder bore, the piston rod projecting from the piston head and slidably insertable into the hole of the front wall, a key groove formed on the piston rod at a position near the piston head, and a longitudinal hole formed within the piston head and the piston rod, wherein the diameter of the piston rod decreases from a backward position adjacent to the key groove to a forward position spaced from the piston head.

Abstract: A spring actuated plunger work support seeks variable tolerance level of workpiece and is hydraulically locked in place to provide resistance to workpiece deflection imposed by processing loads. A collet with independent steel segments in a molded rubber body are preloaded in assembly and actuated by conical ended hydraulic piston having minimum travel to lock the work supporting plunger.

Abstract: The servomotor arrangement has a moving system comprising a piston movable in a cylinder. A latching or retaining member movable transversely of the direction of movement of the system is provided to retain or latch the moving system. The latching member is in operative connection with a pressure chamber, and the pressure chamber is in communication by way of a stop member with a pressure medium source and with a pressure medium sink. The latching member is controllable, a feature which has advantages for the operating behavior of the servomotor arrangement.

Abstract: The piston cylinder type damper comprises a cylinder connected to either member of the pair of a main body and an openable object, and a piston connected to the other member of the pair and adapted to fit into the cylinder and the piston incorporates therein a check valve adapted to allow the air in the cylinder to escape from the cylinder interior while the piston is driven into the cylinder by the movement of the openable object.

Abstract: A pneumatic cylinder device with a locking mechanism has a pneumatic cylinder constituted by a cylinder, a piston slidably received in the cylinder and a piston rod extended from the piston outwardly of the cylinder, and a locking mechanism connected to the pneumatic cylinder and adapted to selectively lock the piston rod against movement. The locking mechanism comprises a housing through which the piston rod is slidably extended; a flexible tubular member disposed in the housing so as to surround the piston rod, the flexible tubular member being contractable and expandable radially; and annular pressure chamber formed around the flexible tubular member and having a variable volume; a volume changing means for causing a change in the volume of the pressure chamber; and a pressure transmission medium accommodated in the pressure chamber and adapted to transmit a pressure change, produced in the pressure chamber as a result of a volume change, to the flexible tubular member.

Abstract: A pneumatic actuator for deploying flexible bodies and the like is disclosed. The actuator is a plurality of telescoping tubes made of high temperature resistant graphite material which are extended by the pressure of gases produced internally by a gas generator contained within the innermost tube. The extended tubes are locked in position automatically and venting of the gases from the tube interior is provided for simultaneously with full and locked extension of the tubes.

Abstract: A hydraulic cartridge suitable for releasing stores in aircraft relies on a ressurized piston rod which extends upon release of hydraulic pressure. The piston rod is enclosed in a cylinder and connected to a source of hydraulic fluid. Upon arming of the piston rod a hydraulic liquid is pumped into the piston rod and forces out a gas via an accumulation piston. Upon complete filling of the piston rod, a trigger is held in place by the pressurized fluid. Upon release of pressure, the pressure on the trigger becomes unbalanced and a spring releases the trigger from the piston rod permitting it to extend.

Abstract: A gas spring comprising a cylinder, a rod slidably extending from the cylinder, and a novel locking mechanism. The mechanism comprises first and second axially contiguous recesses in the circumference of the rod, a locking member normally located in the first recess and snappingly and rockingly movable between two recesses, and axially spaced first and second actuating members cooperating with the locking member. The first actuating member comprises an engaging portion and a releasing portion being circumferentially spaced therefrom. The releasing portion acts to displace the locking member to the second recess. The second actuating member comprises an engaging portion for locking the rod and also for displacing the locking member to the first recess, and axially and circumferentially inclined guide walls for circumferentially displacing the locking member thereby guiding the same between the releasing portion and engaging portions in response to the movement of the rod.

Abstract: The invention relates to a thrust reverser for the jet engine of an aircraft. According to the invention, the unlocking of the doors with a view to passage from their folded position to their extended position, is effective only after they have been previously brought into a super-retracted position with respect to the folded position and said reverser comprises stops which allow the doors to pass from the folded position to the super-retracted position only when the rpm of said engine is lower than a threshold close to idling rpm. The invention is particularly applicable to ensuring operational safety of thrust reversers.

Abstract: An actuator device used with an engine-idle control system of an automobile provided with an air-conditioner, and is adapted so as to operate an operating rod in association with a throttle valve opening lever of an internal combustion engine.

Abstract: A bracing jack comprising a cylinder and a jack bar slidable in the cylinder from a bar extended position to a bar retracted position, the jack having an internal locking mechanism including a hydraulic and a mechanical actuator for unlocking under load.

Abstract: An assembly comprising an inner and an outer cylindrical members, the inner member being displaceable within the outer member and provided with an annular recess, a locking ring being housed in the recess to allow displacement of the inner member in a first direction but locking the members relative one another upon attempt to displace the inner member in a second direction.

Abstract: An assembly comprising an inner and an outer cylindrical members, the inner member being displaceable within the outer member and provided with an annular recess, a locking ring being housed in the recess to allow displacement of the inner member in a first direction but locking the members relative one another upon attempt to displace the inner member in a second direction.

Abstract: A loading arm apparatus having a displaceable main shaft formed as a fluid operable cylinder with a fixed piston which may be clamped at any position along its displacement by a fluid operable clamping means operable against its wall. A guide rod placed in a common block with the main shaft can be clamped also by a separate clamp simultaneously with the main shaft. As a result, the main shaft can be mounted with a large play.

Abstract: An actuating and bracing jack comprising a cylinder and a rod which are pivotably connected at their free ends to a fixed member and to a moveable member respectively. The cylinder has at least at one of its extremities, an internal resilient catch member, and the rod carries a projection capable of coming into engagement behind the catch member. The cylinder has an enlarged cylindrical chamber housing a displaceable locking device capable of being driven by the rod upon retraction movement thereof, to a first position to which the catch member is firmly applied against the projection. The locking device is displaceable in the opposite direction in the cylinder under the action of an actuating fluid to a second position to which the catch member is freed. The rod is provided with a device for taking up play between the rod and cylinder, such device including a displaceable draw member which acts upon a member urging a slotted portion of the rod outwardly into close proximity to the cylinder.

Abstract: A fixed displacement fluid motor or pump of the ball or roller piston type in which a plurality of axially or radially extending reciprocating pistons coact with a cam track to produce output motion or to generate pressure fluid output, respectively. A mechanical locking device, preferably in the form of an expansible retaining ring, is secured to each piston, being adapted to lock the piston in a fixed retracted position and out of contact with the cam in a tapered portion of the cylinder bore in modes of operation during which no motor or pump output is required.

Abstract: An impact drive tool is provided with a percussive piston arranged in a cylinder. A rod on the piston is mounted to drive a nail or other object into a workpiece. A valve arrangement is provided to apply compressed air to the upper surface of the piston, and a storage chamber communicating with the space below the piston is provided for returning the piston to a rest position. A plurality of sequentially arranged latching devices are provided for locking the piston in its rest position, the latching device effective at a given time being dependent on such factors as friction in the device and the amount of compressed air stored for the return stroke. A buffer surface is provided to effect the absorption of energy if the piston passes all of the latching devices, and to rebound the piston to the nearest latching device.

Abstract: A compensating apparatus is suspended from a divided crown block mounted on a derrick of a floating drilling barge, the compensating apparatus including a single cylinder extending vertically between and carrying divided travelling block sheaves on opposite sides thereof, with drawwork lines passing over the divided crown block sheaves and divided travelling block sheaves, and with the upper portion of the cylinder extending between such lines and adapted to move upwardly between the crown block sheaves without interference. A piston structure, forming part of the compensating apparatus, is slidable in the cylinder, being connected to a hook, or the like, from which a running string, such as a drilling string, is suspended extends into an underlying well bore, liquid under pressure in the cylinder acting on the piston structure to support part or all of the weight of the running string.

Abstract: A hydrostatic slewing drive suitable for use in construction equipment, in particular excavators, has a pinion shaft that is rotationally mounted in a housing. A slewing pinion is connected to the pinion shaft. An axial piston motor that utilizes a swashplate construction is in the housing and has a rotating cylinder block with borings and pistons located in the boring. The cylinder block is in one piece with, or integral with, the pinion shaft. The axial piston motor preferably has a constant flow volume, whereby the swashplate is shaped on a housing component. The pistons are supported by slippers on the swashplate which is provided with hydraulic fluid supply channels to which borings in the slippers and in the piston can be connected. The slewing piston can be detachably fastened to the pinion shaft/cylinder block. There is also a brake that can be actively connected with the pinion shaft/cylinder block.