Abstract: The device includes a loading and non-compression locking mechanism for a master cylinder hydraulically connected to a hydraulic fuel tank and to braking members. The mechanism is dependent upon a control member capable of unlocking the mechanism in order to concomitantly urge the master cylinder to apply a predetermined hydraulic pressure for acting on the braking members.

Abstract: An apparatus for the parking lock of a vehicle, in particular, of an agricultural tractor. The apparatus comprises a parking lever mechanically linked to a braking lever by a cinematic chain. The braking lever comprises a tooth apt to engage at least a braking element vehicle. The braking lever is provided with a yielding device placed in correspondence to its own hinge. The yielding device is able to ease the engagement of the tooth with a gap comprised between two teeth of a driveline gear in order to guarantee a reliable parking lock of the vehicle.

Abstract: The brake bolt and the lock cylinder of the vehicle lock are mounted in a part of the vehicle for preventing the rotation of a wheel of the vehicle in a locked state. The brake bolt and lock cylinder are mounted in a brake bolt bore and a lock bore, respectively, located in the swing arm, the chain guard, or a lock body mounted over the axle-retaining nut. The vehicle lock engages a ventilation hole on the rotor, a ventilation hole on the sprocket, the teeth of the sprocket, or a hole on the hub to prevent rotation of the wheel in the locked state. Preferably, the lock cylinder is mounted to the vehicle in both the locked state and the unlocked state, and in the unlocked state the brake bolt is removed from the brake bolt bore for operation of the vehicle.

Abstract: The present invention relates to a position adjustment mechanism, comprising two cylindrical portions, a first one of the portions being slidably disposed inside a second one of the portions. One of the portions has at least three detents and the other portion has at least three members for engaging in respective the detents to hold the portions in a first position, the members being removable from the detents to allow the portions to move into a second position; wherein the detents and members are equi-spaced around the first and second portions.

Abstract: A parking brake mechanism for an air-actuated disc brake includes an electrically powered actuator, an extensible device drivably connected to the electrically powered actuator and able to extend and retract and be held in place in an extended position to thereby apply a brake, and a resilient device arranged to act on the extensible device and maintain a desired level of force to be applied by the parking brake mechanism in the event of contraction of brake components due to cooling.

Abstract: A system is used with a boom pivoted on a frame about a horizontal pivot axis between raised and lowered positions by a first fluid ram joining the frame and the boom. A releasable locking mechanism locks the boom relative to the frame to prevent pivotal movement of the boom about its horizontal pivot axis. A second fluid ram is disposed between the frame and the boom, the second fluid ram compressed between the frame and the boom when the boom is adjacent the raised position, but prior to the boom achieving a latched position substantially coinciding with the raised position. A fluid circuit of the second fluid ram has two selectable pressure levels. The first level substantially prevents the boom from achieving the latched position, the second level permits the boom to achieve the latched position while providing fluid cushioning to dissipate impact forces between the boom and frame.

Abstract: A pin release assembly comprises an outer housing that is held in place to allow the outer housing to only rotate. An inner spool is supported for axial movement in relation to the outer housing. Rotation of the outer housing axially moves the inner spool. The inner spool is operatively connected to a latch pin to selectively project and retract the latch pin.

Abstract: An actuating mechanism (1) for operating a parking-lock mechanism of the drive chain of a vehicle with an automatic drive. The actuating mechanism has a piston unit (4), a detent element and an electromagnetic operating device (6) for operating a release element (7), which is intended for deactivating the detent element (5). The piston unit communicates with an emergency unlocking mechanism (14) and is positioned to open the locking mechanism by way of the piston unit. The detent element, the piston unit and the release element interact such that the locking mechanism remains in the currently engaged state when the locking mechanism is open and the operating device is not electrified, as well as when the locking mechanism is closed and a fluid pressure is applied to the piston unit.

Abstract: In the specification and drawings, an apparatus and method for operating a take-up mechanism is described and shown. The take-up mechanism includes a gear, a motor configured for engagement with the gear, and a manual input shaft configured for engagement with the gear. In a first mode of operation, the gear transmits rotation from the motor, and in a second mode of operation, the gear transmits rotation from the manual input shaft. In an alternate embodiment, the take-up mechanism may include a plate between the manual input shaft and the gear. The plate may be configured to transfer rotation and torque from the manual input shaft to the gear, or inhibit the transfer of rotation and torque from the gear to the manual input shaft. The method for operating the take-up mechanism uses a motor and a manual input shaft connected to a gear to operate the take-up mechanism in the first and second modes.

Abstract: Blocking apparatus, as well as a gearbox drive unit containing such a blocking apparatus, as well as a method for production of a gearbox drive unit such as this for blocking any rotary movement of a shaft (14) with respect to a housing (16) of the gearbox drive unit (10), having a first blocking element (32) which can rotate and having a second blocking element (34) which can be moved with respect to the first blocking element (32) by means of at least one electromagnet (44) and at least one return element (42), with the blocking elements (32, 34) engaging with one another in an interlocking form in the axial direction in the blocked state, and with at least one acoustic damping element (28) being arranged axially between the interlock (85) and the electromagnet (44).

Abstract: A device and method adapted to keep a bicycle upright and stable while not in use that engages one or more brake levers and the brakes of the bicycle, while the bicycle is leaned against an object. A device and method which is lightweight, easy to keep with the bicycle, and which is adapted to be used with a large variety of types of bicycles. A device and method adapted to keep a bicycle upright and stable while leaned against an object while on a slope.

Abstract: A parking brake device for a vehicle includes a vehicle operating lever pivotally mounted on a bar-type steering handle having one end thereof provided with a grip that may be gripped by a driver, and a parking lever manually movable between an actuated position, at which a parking brake mechanism mounted on the vehicle is actuated, and a release position at which the parking brake mechanism is released. The parking lever referred to above is, when moved to the actuated position, positioned in between the grip of the steering handle and the operating lever to thereby hamper the operating lever from being pivoted in an operating direction.

Abstract: A hydraulic vehicle brake having an optional locking device is described. The locking device is disposed inside a hydraulic chamber that is delimited by a brake piston. For reducing the hydraulic fluid intake, an incompressible filling body is provided inside the hydraulic chamber.

Abstract: The present invention discloses and claims a torque transfer mechanism. The torque transfer mechanism connects an input shaft to an output shaft to transmit rotation and torque in either direction from the input shaft to the output shaft. The torque transfer mechanism also inhibits the transmission of rotation and torque in at least one direction from the output shaft to the input shaft. In alternate embodiments, the torque transfer mechanism may transmit rotation and torque in one direction from the output shaft to the input shaft. In still further embodiments, the torque transfer mechanism may inhibit the transmission of rotation and torque in either direction from the output shaft to the input shaft.

Abstract: The present invention relates to a vehicle brake (10) comprising a housing (12), a brake piston (16) accommodated in the housing (12) and coupled to a brake lining (20), a blocking device (26) for arresting the brake piston (16) inside the housing (12), and an electromechanical actuating device (42) for activating the blocking device (26) in a parking brake situation, wherein the brake piston (16) together with the housing (12) delimits a fluid chamber (68) that is chargeable with hydraulic fluid, so that the brake piston (16) for actuating the vehicle brake (10) is hydraulically displaceable inside the housing (12) along a piston longitudinal axis (A). In such a vehicle brake it is provided that there is associated with the blocking device (26) a locking arrangement (125), which in a parking brake situation acts mechanically on a component (36) of the blocking device (26) and locks the blocking device against a resetting movement.

Abstract: A vehicle immobilization system having a controller and a brake system that is capable of maintaining the vehicle brakes in an engaged position to prevent rotation of the wheels.

Abstract: An automatic winding device of a roll screen is disclosed. A screen is automatically rolled up when a user pulls a ball chain down and the screen is automatically stopped when the user just releases the ball chain, to thereby adjust a height of the screen simply and easily. A lower end of the screen is prevented from colliding with the winding device when the screen is rolled up, to thereby create a silent and comfortable indoor environment.

Abstract: The invention relates to a brake disk lock having a receiving gap for the receiving of a brake disk, comprising: a securing section for the closing of the receiving gap, an alarm device for the output of an alarm signal, a movable brake disk recognition device, a pressure switch having a contact element which is movable against the spring force of a first spring means by the brake disk recognition device to activate the alarm device, and an actuation section which is movable out of a release position into a securing position to close the receiving gap by means of the securing section.

Abstract: The invention relates to a brake disk lock having an actuable housing shell, a support section, an engagement hoop and a securing section, with the support section and the engagement hoop bounding a receiving gap for the receiving of a brake disk, with the housing shell being arranged on the same side as the support section with respect to the receiving gap and being movably supported at the support section and with the housing shell, the support section and the securing section cooperating with one another such that the housing shell is movable from a release position into a securing position by a movement of the housing shell relative to the support section in the direction of the receiving gap in order to close the receiving gap by means of the securing section.

Abstract: When a solenoid is operated so as to move an engaging pawl to a disengaged position, if a displacement detection device (an angular position sensor and a controller) detects that a motor rotor has not been displaced by an amount equal to or exceeding a predetermined level, that is, if the motor has not returned by an amount equal to or exceeding the predetermined level within a predetermined time period, a defect in an unlocked condition (an unlocking failure of a park braking lock mechanism) is determined. In this case, a driver is notified of the failure, so that prompt action can be taken to rectify the unlocking failure of the park braking lock mechanism.

Abstract: The invention is a electromechanical locking device for a brake piston of a hydraulically actuated wheel brake. The locking device is disposed at least in some portions in the interior of a hollow-cylindrical brake piston. This interior of the brake piston is filled with hydraulic pressure fluid and in the event of brake actuation is subjected to pressure. The invention includes a filler piece and a coupling element, which reduce the pressure-fluid-filled volume of the brake piston, prevent blocking of the locking device in its terminal positions, and make it possible for the two terminal positions of the locking device to be detected and evaluated by an electronic control unit.

Abstract: A disk brake mechanism is described, comprising one of a pneumatic and electromechanical actuator having a brake piston, a brake application device for actuating the disk brake mechanism, and a fixed-type brake caliper attached to an axle, for moving a reaction-side brake lining against a brake disk during application. The mechanism also includes a pivoting lever of the brake application device, operatively connected to the brake piston for pressing an application-side brake lining during application, the pivoting lever being supported on one side on the brake caliper, and a supporting part forming, after a predefined stroke portion of an application stroke of the brake piston, an abutment for the pivoting lever between a pressure region of the application-side brake lining on the pivoting lever, and a support of the pivoting lever on the brake caliper.

Abstract: An electromechanical braking system includes a brake rotor, a brake stator, an EMA (52) having a rotor shaft (36), a ram (42) operably connected to the EMA (52) having a first end movable between a first position urging the brake stator against the brake rotor and a second position, a clamp device (32) shiftable between a first clamping position in clamping engagement with the rotor shaft (36) and a second clamping position and a clamp controller (46) for shifting the clamping device (32) between the first and second clamping positions. Also a method of using the braking system as a parking brake.

Abstract: The vehicle brake-rotor lock includes a mounting bracket, and a lock mechanism, including at least one deadbolt shaft, which is preferably made of steel, stainless steel, titanium, tungsten, boron, or any other dense metal, used to mechanically immobilize the vehicle. The bracket is preferably permanently attached to the protected vehicle. In a locked state, the deadbolt shaft extends through a cross-drilled ventilation hole or slot on the brake rotor of the vehicle, thereby preventing rotation of the brake rotor and the wheel. The lock mechanism preferably prevents any forward or rearward movement of the vehicle when engaged to allow for a heightened security for any vehicle using a disc braking system. In one embodiment, the lock mechanism is mechanically actuated. In another embodiment, the lock mechanism is electronically actuated.

Abstract: An aircraft brake rotor (60) or stator (110) includes a circular disk having first and second walls (62, 112) and a peripheral wall (64, 114) including at least one notch (66, 116) having a bottom (70) and first and second sides (72). The disk further includes first and second peripheral wall portions separated by the notch (66, 116). An insert (10) is mounted in the notch (66, 116) and has first and second legs (14) with inner and outer walls (20, 22) extending along the notch first and second sides (72). The insert (10) has a first portion having a first width. A circumferential distance between the notch first wall (72) and the notch second wall (72) at a position toward the peripheral wall having the notch (66, 116) has a width less than the insert first portion first width. A retainer (30, 118) overlies the disk first and second walls (62, 112) and a portion of the insert (10) to limit axial movement of the insert (10) relative to the rotor (60) or stator (110) disk.

Abstract: An electric parking brake includes an actuating device, which provides a force to lock and unlock the parking brake using power supplied by manipulation of a control button, and an equalizer, which is coupled at a first end thereof to the actuating device and is coupled at a second end thereof to a parking cable to pull or release the parking cable, which operates a braking device of a wheel, depending on operation of the actuating device. The electric parking brake further includes an operating load measuring unit, which measures operating load that pulls the equalizer in the parking cable and sends the measured signal to an ECU that controls the actuating device.

Abstract: A cart having a frame for conveying cargo. The cart includes at least one brake assembly mounted within the frame of the cart. The brake assembly is configured to provide braking by engaging and disengaging a rear wheel axle. The cart further includes a control mechanism configured to selectively engage and disengage the brake assembly by rotation of a cart handle. In addition, the cart includes a brake release device configured to disengage the brake assembly when carts are nested.

Abstract: A device and method adapted to keep a bicycle upright and stable while not in use that engages one or more brake levers and the brakes of the bicycle, while the bicycle is leaned against an object. A device and method which is lightweight, easy to keep with the bicycle, and which is adapted to be used with a large variety of types of bicycles. A device and method adapted to keep a bicycle upright and stable while leaned against an object while on a slope.

Abstract: There is provided an electric disk brake including a caliper and a lock mechanism wherein the lock mechanism shifts with a pad pressing member, and is composed of: a shifting member provided with a plurality of claws with a predetermined pitch in a shifting direction; an engaging member provided with an engaging portion which is engageable with the claws of the shifting member; an actuator driving the engaging member in a direction that the engaging portion engages with the claws of the shifting member; and an energizing means normally energizing the engaging member in a direction that the engaging portion is detached from the claws of the shifting member, and the engaging portion is engaged with the claws provided on one-side surface of the shifting member when being locked while the engaging portion is positioned on the other-side surface of the shifting member when being unlocked.

Abstract: A hydraulic vehicle brake equipped with a parking brake device, in particular for motor vehicles, including a brake housing in which a hydraulic service pressure chamber is delimited by a brake piston, wherein the parking brake device acts on the brake piston and, in the applied condition, can be locked by a locking device, and an energy accumulator cooperating with the brake piston is equipped with at least one integrated spring element. In order to realize a simple and low-cost parking brake function that complies with legal requirements, according to the invention, the parking brake device is operable by a pressure that is introduced into the service pressure chamber and enables charging the energy accumulator.

Abstract: A method for actuating an electromechanical parking brake device for a brake that can be actuated by an electromechanical actuator comprised of an electric motor and of a reduction gear connected downstream of the electric motor and provided for converting a rotational motion into a translatory motion. In order to guarantee that the electromechanical parking brake device works reliably in all operating states without using a tension force sensor, the method determines and stores, during the actuation of a parking brake device, a mean value of the torque of the electric motor necessary for generating the application force of the brake corresponding to the parking brake actuation and simultaneously determines the actuator position and actuates the electric motor at later points of time in such a way that it generates this torque multiplied by a correction factor k?=>1 so that the exerted tension force is maintained or increased.

Abstract: A parking brake system pneumatically actuates an air cylinder to mechanically lock a wheel brake in an applied position in response to a parking demand request. The parking brake system includes a dual hand control that has an electronic control element and a pneumatic control element. The electronic control element communicates with an electronic braking system control unit and the pneumatic control element communicates with a parking brake air reservoir. When the dual hand control is moved to a park position, the electronic control element generates an electronic control signal that applies a parking brake force to the wheel brake. The pneumatic control element generates an air signal that is sent to the air cylinder. The air cylinder includes an extendable shaft that supports a lock member. The air signal moves the lock member into engagement with a brake operating member to lock the wheel brake in the applied condition.

Abstract: A parking brake assembly for a railway car includes a ratchet mounted for rotation on a threaded piston rod of a brake actuator and a holding pawl engageable with the ratchet for maintaining a push rod of the parking brake assembly to apply braking force when the air pressure is lost in the brake pipe and releasing the push rod to accordingly release the braking force when the supply of air pressure in the brake pipe is restored. An operating lever and a cylinder connected thereto are provided for selectively rotating the holding pawl. Valve is provided for supplying air pressure to and evacuating it from the cylinder. Release mechanism is provided for manually releasing the braking force. The parking brake assembly is employed with either truck-mounted or carbody-mounted braking system.

Abstract: A golf car having a hydraulic fluid brake system. The hydraulic fluid brake system is implemented as a disk brake system which is responsive to hydraulic fluid pressure generated from a master cylinder. A brake pedal and associated linkage provides input to a master cylinder to generate a hydraulic fluid pressure to control a brake caliper assembly. The brake pedal has a range of travel, where a first portion of the range defines a service mode of operation and a second portion of the range defines a parking mode of operation. In the parking mode of operation, the brake pedal and linkage engages a detent to maintain application of the brake to provide a parking mode of operation. An accumulator in the brake system provides an input force to maintain hydraulic fluid pressure sufficient to retain a parking mode of operation.

Abstract: An operating mechanism (1) for a parking brake, particularly for motor vehicles, arranged in a housing (60) comprising a threaded rod (20) driven by a motor (10) having a first brake cable fixing (30) guided on said threaded rod (20) for the transformation of said rotation of said motor (10) in a linear movement of said first brake cable fixing (30); and a second brake cable fixing (40) in axial arrangement with said first brake cable fixing (30) and said motor (10) for executing a relative movement of said first (30) and said second brake cable fixing (40) to each other whereby said first (30) and said second brake cable fixing ( 40) can carry out a common relative movement with respect to the housing (60) for a uniform load distribution to the connected brake cables (70).

Abstract: A parking brake for a vehicle, including a parking brake unit, an actuating device situated inside the vehicle and operable to transmit an actuation signal to a control unit, a hydraulic circuit of a service brake of the vehicle connected to the parking brake unit, and an actuator and locking device for locking the parking brake in a braking position; the parking brake is actuatable by means of the hydraulic circuit and the actuator is a brake booster of the service brake.

Abstract: A pivoting column with stop cells formed inside the column is disclosed. The stop cells have to functioning positions, a locking position and a moving position. In the locked position the stop cells allow the column to rotate freely in one chosen direction, and prevent rotation in the opposite direction. In the moving position the stop cells allow free rotation of the column in either direction.

Abstract: A parking brake assembly for an air actuated disc brake includes an operating shaft for amplifying a force supplied by an air actuator and transmitting the force to brake pads. The operating shaft is pivotable about an axis between a rest position at which a braking force is not applied and an actuated position at which the braking force is applied. An abutment surface on the operating shaft is selectively engageable by a complementary latch of the assembly to retain the operating shaft in the actuated position and thereby apply the parking brake. The abutment surface has a helical configuration.

Abstract: The present invention relates to parking brake lever system 1 for manually tightening and releasing of at least one brake cable 90, wherein the parking brake lever system 1 comprises at least one rotation arm 10, 12 pivotably supported at a fixed support 50, wherein the rotation arm 10, 12 is connected to the brake cable 90, and at least one actuation lever 20, 22, which at a first end thereof is pivotably connected to the rotation arm 10, 12 and which at a second end thereof is rigidly connected to a hand grip 40, wherein the actuation lever 20, 22 is slidingly supported at the fixed support 50, such that the hand grip 40 defines a curved path during actuation of the parking brake lever system 1.

Abstract: The present invention discloses and claims an apparatus and method for operating a take-up mechanism. The system includes electric and manual actuating mechanisms engaged with a combiner mechanism to apply force to the take-up mechanism. In a first mode of operation, the combiner mechanism transmits rotation from the electric actuating mechanism, and in a second mode of operation, the combiner mechanism transmits rotation from the manual actuating mechanism. The method for operating the take-up mechanism uses a motor and a manual input shaft connected to a gear to operate the take-up mechanism in the first and second modes. The motor is engaged with the gear during at least the second mode of operation.

Abstract: A parking brake device for a vehicle includes a vehicle operating lever pivotally mounted on a bar-type steering handle having one end thereof provided with a grip that may be gripped by a driver, and a parking lever manually movable between an actuated position, at which a parking brake mechanism mounted on the vehicle is actuated, and a release position at which the parking brake mechanism is released. The parking lever referred to above is, when moved to the actuated position, positioned in between the grip of the steering handle and the operating lever to thereby hamper the operating lever from being pivoted in an operating direction.

Abstract: An adjusting mechanism alters the heel height on a prosthetic foot, and works independently of any articulating ankle joint or foot style, without changing the original dynamic alignment of a prosthetic leg. In a two chamber hydraulic closed system—a fluid material is allowed to flow through the two chambers by use of pistons that push the fluid material equally from one chamber to another until the desired heel height is obtained. Once the correct position is obtained, the ports are closed by use of a push button stop, which closes the ports and stops all transfer of fluid between the ports holding the heel in position during use.

Abstract: A motorcycle disk-brake lock which makes it highly unlikely or prevents normal operation of the motorcycle while the lock is engaged with a disk-brake of the motorcycle and to thereby provide a clear alert to an operator thereof, and which can be conveniently stored and transported when not in use as a disk-brake lock.

Abstract: In a vehicle brake comprising a housing, a brake piston, which is accommodated in the housing and on which a brake lining is fitted, and a blocking device, it is provided that the brake piston is displaceable in the housing by means of an actuating device and that the brake piston is securable relative to the housing by means of the blocking device. In this vehicle brake, it is further provided that the blocking device comprises an electromechanical latching arrangement, which is actuable in such a way that in a latching position it prevents a displacement of the brake piston inside the housing and in a release position it enables a movement of the brake piston in the housing.

Abstract: A brake device for a chain saw is provided, wherein a driving shaft, which passes through a brake block, a torsion spring, a driving block and a chain wheel, is assembled with a driven gear, and two ends of the torsion spring are respectively fixed to the brake block and the driving block. The driven gear is loosely fit to the brake block, and the chain wheel is fixed to the driving shaft. When the driven gear is driven to rotate, the brake block, the driving shaft and the chain wheel are brought to rotate synchronously. When a force is applied to the brake block via a brake pin, the torsion spring will deform and separate from the driving block so that the driving block fails to transmit a driving force to the brake block, and thereby the braking effect is achieved.

Abstract: An electric parking brake includes an actuating device, which provides a force to lock and unlock the parking brake using power supplied by manipulation of a control button, and an equalizer, which is coupled at a first end thereof to the actuating device and is coupled at a second end thereof to a parking cable to pull or release the parking cable, which operates a braking device of a wheel, depending on operation of the actuating device. The electric parking brake further includes an operating load measuring unit, which measures operating load that pulls the equalizer in the parking cable and sends the measured signal to an ECU that controls the actuating device.

Abstract: Disclosed is a wheel locking device for vehicle which prevents an unauthorized movement of the vehicle. The wheel locking device for vehicles comprises a supporting disk attached to an outer side surface a wheel and provided with arms, fixtures inserted into the arms so as to surround a circumferential surface of the wheel, clamping pins for fixing the fixtures, a guard disk for surrounding an outer side surface of the supporting disk so as to cover the clamping pins, a clamping bolt for holding the guard disk and the supporting disk together, a lock for locking the clamping bolt. The wheel locking device is easily assembled and attached to the wheel, and is effectively protected from an unauthorized separation from the wheel. Further, the locations of the fixtures are adjusted according to the size of the wheel of the vehicle or the fixture has a folding-type structure easily fixed to the wheel without interfering with the frame of the vehicle, thereby being firmly secured to the wheel.

Abstract: A hydraulic parking brake device is selectively switched between a braking state and a non-braking state. A braking force decreases as a pressure in the control oil chamber increases and increases as the pressure in the control oil chamber decreases. The device includes a discharged oil restrictor located in a discharge passage and an accumulator connected to the control oil chamber. The accumulator is capable of releasing hydraulic oil to the control oil chamber when the braking force is greater than that at the time when the parking brake device is switched from the non-braking state to the braking state and the braking force can further be increased during the braking state of the parking brake device. Thus, the parking brake device can gradually brake the vehicle from the running state.

Abstract: A power tool includes a braking system that minimizes a stopping time for a cutting blade of the power tool. The braking system includes a roller bearing clutch mechanism combined with a positive stop pin. The stop pin is provided at an end portion of a cable assembly. The cable assembly is coupled to a trigger through a lever on one end, with the stop pin and a return spring inserted into a gear box on the other end. When the trigger is in a released position, the stop pin fully engages into a positive stop on a bearing cage at a top portion of the drive assembly. The coiled return spring keeps the stop pin in position. When the trigger is pulled, the cable pulls the stop pin out of the positive stop.

Abstract: 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 port for receiving a fluid pressure to move the pressure piston to a first position. The actuator also has a locking mechanism. The locking mechanism has a first and second surface, and both surfaces are movable in response to the fluid pressure at the first port. The surfaces lock the pressure piston in a first position upon removal of the fluid pressure at the first port.