Abstract: The present invention relates to a door closer comprising a cylinder body and a telescopic rod, wherein a one-way air intake valve is provided in the cylinder body to take in air in one way in an internal cavity of the cylinder body when the door is opened. The internal cavity of the cylinder body is divided into two automatically pressurizeable and automatically compensatable air cavities. When the door is opened or closed, the air inside the internal cavity of the cylinder body flows cyclically in the two air cavities. The door closer ensures air substantially flows cyclically in a cylinder body, reduces pollution caused by dusts in air into and out of the cylinder body to the lubricant oil in the cylinder wall, guarantees the lubricating effect of the lubricant oil, enables the door closer to operate normally and effectively prolong the service life of the door closer.

Abstract: A power boost assembly is disclosed that can be used with a door actuator, such as a door closer. The power boost assembly is structured to store an energy during a first movement of a door and release the stored energy during a second movement of the door. In one form the power boost assembly can be structured as a module that can be added to an existing door and door closer installation. In one form the power boost assembly is used to increase a closing force imparted to a door to ensure a latching event.

Abstract: A power boost assembly is disclosed that can be used with a door actuator, such as a door closer. The power boost assembly is structured to store an energy during a first movement of a door and release the stored energy during a second movement of the door. In one form the power boost assembly can be structured as a module that can be added to an existing door and door closer installation. In one form the power boost assembly is used to increase a closing force imparted to a door to ensure a latching event.

Abstract: The invention relates to a regulating valve, which is attachable in particular in a bore, executed with a female thread, of a hydraulic door closer. The regulating valve has a body adjoined by a regulating area. The regulating valve also has a thread provided with an anti-rotation element. The thread, including the anti-rotation element, being screwed into the female thread of the bore. In order to provide a regulating valve of a simple design, in which any unwanted adjustment of the regulating valve during operation is excluded, the anti-rotation element of the regulating valve has a plastic material layer at the thread flanks of the thread. The plastic material layer cooperates with the female thread of the door closer.

Abstract: A method for controlling a door, comprising the steps of storing energy during a manual opening of a door, sensing an object within a doorway, selectively applying a force derived from the stored energy, to close the door, based on the sensing of an object in the doorway. The closure is preferably controlled by an electronic control. A door closing device comprising an energy storage device for storing energy during door opening and releasing the stored energy to subsequently close the door, a damping system for damping a closure of the door, a sensor for detecting an object within a doorway, having an output, a controllable device for selectively restraining the energy storage device from closing the door, and a control system for controlling the controllable device based on the output.

Abstract: A door closing device for a door is described. The device includes an externally powered and/or spring force-powered catch device F for mounting to the stationary door frame TR or the door leaf TF. The catch device has a movably mounted catch element F and an externally powered and/or force storage means-powered drive assembly M connected to the catch element F. It is essential that the catch element F can be connected to and disconnected from the counterpart element, for example the lock latch S, so that the catch element F can be brought into engagement with the counterpart element S for pulling the door leaf TF shut and can be brought out of engagement with the counterpart element S outside of the pulling-shut movement.

Abstract: A pneumatic door closer with a protective external telescoping cylinder and angled handhold. Such a closer is generally outfitted with a structural tubular support that follows the telescoping and collapsing of the closer's piston and that has sufficient stiffness to limit the stresses imposed on the piston throughout its extension. The support provides a resistance to perpendicular force. Moreover, when the piston is collapsed within the exterior chamber, the support pivots to the exterior chamber with bushing(s) fixed to the end of the support that travel along the length of the exterior column as the closer telescopes or collapses, to permit continued smooth sliding motion throughout the extension stroke.

Abstract: The invention discloses a door closer capable of realizing self-control positioning, which comprises an elastic mechanism, wherein the elastic mechanism comprises a cylindrical housing, a piston component, a long spring and a pull rod, the piston component is built in the cylindrical housing and connected and fastened with one end of the pull rod, the pull rod is sheathed in the long spring, and the two end parts of the long spring respectively are in contact with a sealing lid of the piston component and the cylindrical housing; and the door closer further comprises a self-control positioning mechanism, the self-control positioning mechanism comprises a cylindrical outer sleeve, a control part and a locking part, the cylindrical outer sleeve is connected and fastened with the cylindrical housing, the control part is and the locking part are linked by a clutch and joined together while connecting, the locking part and the pull rod are linked by a clutch and clasped when locking, and the pull rod is provided w

Abstract: A return device for a drawer employs an actuator to drive a slide block, when the drawer is pulled open, the slide block is moved into a positioning concave and positioned therein while stretching an elastic member. Or pushing the drawer back can make the slide block slide out of the positioning concave, meanwhile, the elastic member pulls the drawer back to its original position. Furthermore, since the angle between the slide surface of the positioning concave of the positioning member and the track is obtuse, it is easy for the slide block to slide in and out, so that the drawer can be easily positioned and unlocked from the positioned state.

Abstract: A door positioning system is provided. The system includes a first member and a second member. The first member is attached to an exterior door at a first end of the first member and to an anchor location at a second end of the first member opposite the first end. The first member includes a locking region. The second member is configured to engage the locking region of the first member if the exterior door is opened a first threshold amount. The second member and locking region are configured to hold the exterior door in an open position if the second member is engaged with the locking region. The second member and locking region are configured to disengage if the exterior door is opened a second threshold amount beyond the first threshold amount. The exterior door is able to close with the force of the door closer if the second member is disengaged from the locking region.

Abstract: A hinge for cold rooms, swing gates or the like includes a stationary support structure and at least a door movable between an open door position and a closed door position. The hinge comprises a box-like hinge body and a pin rotatably coupled to rotate about a first axis between the open door position and the closed door position. Closing means are provided for automatically returning the door, as well as a working fluid acting thereon to hydraulically contrast their action. The closing means comprise a cam element unitary with the pin interacting with a plunger element housed in an operating chamber defined within the box-like hinge body. The box-like hinge body has an elongated shape to define a second axis perpendicular to the first axis.

Abstract: A drawing device increases durability of dampers. A slider 14 and a damper base 22 are provided slidable on a base 12 of a drawing device. The damper base 22 is provided with a damper lock 28 which engages with the base 12 to prevent the damper base 22 from sliding and also makes the damper base slidable in the longitudinal direction. When the slider 14 moves relative to the base 12 in the longitudinal direction by a biasing force of an elastic member 15, the damper base in engagement with the base 12 by the damper lock 28 first moves relative to the slider 14 and thereby, the first damper 24 generates a damping force. Then, the damper lock 28 and the base 12 are disengaged, the base 12 moves relative to the damper base 22 and the slider, and thereby, the second damper 25 generates a damping force.

Abstract: A cushioning device for opening and closing of sliding shutters, particularly of sliding shutters for furniture, to be applied as a single item to each shutter or sliding partition, in order to be able to cushion an end part of their opening and closing movement. The cushioning device includes a cushioning box applied with brackets for support and sliding of the individual shutter; this box being equipped with two opposing braking devices of a rotary type, whose toothed hub directly meshes with a rack fixed to the box, each braking device being joined to its own slider guided by the box and being joined at one end by an elastic device with its opposite end joined to the other slider, both sliders being equipped with a hook for activating and deactivating the corresponding action of the final section of travel to be cushioned.

Abstract: A forward-moving mechanism of a movable body is provided with a receiving member placed movably inside a main body placed in a recessed area provided on either one of a movable body or a stationary body supporting the movable body to be capable of reciprocal movement, and linked to an assisting device for enabling the movable body to move forward up to a prescribed position; and a contact body provided on the other of the movable body and the stationary body contacting with the receiving member and moving inside the main body in the process of forward movement of the movable body. An area for movement of the receiving member in the main body includes a wall part for guiding the movement of the receiving member, and a device for preventing deformation of the wall part is provided adjacent to the wall part.

Abstract: A sliding door with a door leaf, which is suspended from at least one carriage and guided to be displaceable along a roller rail profile disposed at a wall or at a ceiling. The sliding door includes a closing device, which is suitable to displace the door leaf into a closed position in a decelerated manner. The closing device is disposed at the door leaf and includes a first and a second spring-damper element, which are disposed to be counter-directional to each other. The second spring-damper element is suitable to displace the door leaf into an open position in a decelerated manner.

Abstract: A self-adjusting door closer is disclosed. The door closer is self powered and includes a control unit to intelligently control a valve within the door closer to vary the operating characteristics of the door closer as needed. The controller includes a position sensor to determine a position of the door, and at least one input switch to enable user selection of at least one door closer parameter for an installed door closer. The control circuitry is operable to set the valve in response to the user selection of the door closer parameters, and the position of the door, in order to control force exerted by the door closer on the door. A generator can be provided to provide electricity to power the controller and store power to operate the controller.

Abstract: A sliding door with a door leaf, which is suspended from at least one carriage and is guided to be displaceable along a roller rail profile, which is disposed at a wall or at a ceiling. The sliding door having a closing device, suitable to displace the door leaf into a closed position in a decelerated manner. The closing device includes at least one spring-damper element disposed near a ground level area at the door leaf by a carrier module.

Abstract: Furniture hinge with at least two fitting parts for fixing to furniture parts, one of the fitting parts being designed as a hinge arm and at least one joint lever which pivots during the hinge movement and a rotation damper for damping a hinge movement, wherein a slide, movably mounted on the hinge arm may be driven by the pivotable joint lever and the slide acts on the rotation damper by means of a transmission mechanism (T).

Abstract: A drawing device increases durability of dampers. A slider 14 and a damper base 22 are provided slidable on a base 12 of a drawing device. The damper base 22 is provided with a damper lock 28 which engages with the base 12 to prevent the damper base 22 from sliding and also makes the damper base slidable in the longitudinal direction. When the slider 14 moves relative to the base 12 in the longitudinal direction by a biasing force of an elastic member 15, the damper base in engagement with the base 12 by the damper lock 28 first moves relative to the slider 14 and thereby, the first damper 24 generates a damping force. Then, the damper lock 28 and the base 12 are disengaged, the base 12 moves relative to the damper base 22 and the slider, and thereby, the second damper 25 generates a damping force.

Abstract: An automatic door closer structure comprises a casing, at least one piston, at least one limiting member, at least one driving member connected with the piston and a shaft. The casing has an outside wall, a chamber, an inside wall and at least one first limiting portion. The piston slidably disposed within the chamber of the casing has an outer wall and a second limiting portion formed on the outer wall. The limiting member has a first end portion and a second end portion both are connected with the first limiting portion of the casing and the second limiting portion of the piston respectively to limit rotation of the piston. The shaft comprises a shaft body pivotally disposed in the casing and an eccentric cam contacts against the driving member.

Abstract: A drawer slide with an auto close dampening system with reset feature is disclosed. The drawer slide may incorporate a stationary slide member attached to a frame of the drawer and a pin in fixed relative position to a drawer box of the drawer. A carriage is attached to the stationary slide member and has an actuator that is releasably engageable with the pin. The actuator works in conjunction with the pin to automatically close the drawer box to the closed position. During malfunction, the actuator is drawn back to a retracted position so that the auto close mechanism no longer automatically closes the drawer box when the drawer box is traversed to the closed position. The actuator includes a ramp so that the pin may be pushed over the ramp and engage back with the actuator to reset the auto close mechanism.

Abstract: In a dishwasher of the built-in type comprising a door (12) which is tillable about a generally horizontal axis (A), the door comprising means for fixing a decor panel (14), said dishwasher further comprising means (24) for biasing the door towards the closed position and dampening means (26) for dampening the closing of the door, the dampening means is or can be adapted for dampening the closing of the door in the undecorated state of the door.

Abstract: A withdrawing mechanism includes a striker disposed on one of a swingable member and a main body, a catcher disposed on the other of the swingable member and the main body, and a damper for applying a damping force to a turning operation of the catcher toward a turned position. The catcher includes a casing, a rotational plate having a hooking groove for catching the striker therein, and a spring attached between an attaching portion of the rotational plate and a fixing portion of the casing to pull and rotate the rotational plate. When the rotation plate catches the striker, the rotational plate rotates in a direction to pull the spring, and when the attaching portion passes a position on a linear line extending the attaching portion, rotational center of the rotational plate and fixing portion, the rotational plate is pulled to move the rotational plate to the turned position.

Abstract: A closing device that includes a latching member that when moved a given distance utilizes a gear to affect a mechanical advantage that results in an end of a biasing member being moved less than the given distance. The biasing member is used in moving a first drawer slide member to a closed position relative to a second drawer slide member, and use of the gear and the resulting mechanical advantage provide a smoother transition when the first drawer slide member is engaged or disengaged from the closing device.

Abstract: A retraction mechanism includes a striker provided in either a fixed body or a movable body which is movably supported by the fixed body; a catcher provided in the other body and engaging the striker at a predetermined moved position of the movable body to be capable of engaging and disengaging; and an urging device enabling to accumulate urging forces in a moving process of the movable body. The retraction mechanism retracts the movable body by the urging forces accumulated in the urging device in a state wherein the striker and the catcher are engaged. The retraction mechanism includes a guide device controlling a relative position between the striker and the catcher, and when the striker and the catcher change the relative position, the change thereof is absorbed by the guide device, so that the engagement becomes possible.

Abstract: A wheel assembly has a housing, a wheel, a rotating device and a controlling device. The housing has a sleeve, an extending portion extending laterally from the sleeve, and brackets extending from opposite sides of the housing. The wheel is rotatablely mounted between the brackets of the housing via a shaft. A rotating device includes a lower pole for engaging with the sleeve of the housing, and a fixing element at bottom of the lower pole for fixing the lower pole on the sleeve in assembly. The controlling device includes a limiting element and a pressing element cooperating with each other to limit direction of the housing and rotation of the wheel simultaneously. The limiting element is mounted in the extending portion and adjacent to the wheel in assembly. The pressing element is mounted on an end of the extending portion for driving the limiting element.

Abstract: A track and arm type door controller assembly. A channel member and a gripping member each having a toothed surface are provided, with the gripping member slidably disposed in the channel member. When the pin is retracted, the gripping member teeth are spaced from the channel member teeth, and the gripping member may freely slide along the track. When the pin is advanced, the teeth engage and the gripping member is in a fixed, non-sliding position. An elongated spring and a spring clip or a latch may be provided that releasably engage to hold the door open. A set screw may adjust the tightness of the engagement of the elongated spring and spring clip of latch. A friction assembly may be provided to slow the motion of the door.

Abstract: A catcher member is provided to be movable between a standby position and a retracted position, and at the standby position, while being urged by an urging device, the catcher member is positioned in the standby position by a holding device. When a movable body is moved forward a predetermined movement position, a striker member is caught and engaged with the catcher member positioned in the standby position, and subsequently, holding by the holding device is released, and the catcher member is moved or relatively moved up to the retracted position by being urged by the urging device, so that the urging force is applied to the movable body up to position where the movement ends. An operation device is provided so as to be able to operate to move the catcher member which was moved to the retracted position without catching the striker member, toward the standby position.

Abstract: A withdrawing mechanism includes a striker disposed on one of a swingable member and a main body, a catcher disposed on the other of the swingable member and the main body to capture the striker moving, and a damper for applying a damping force to a turning operation of the catcher toward the turned position. The catcher is turnable between a standby position and a turned position. The catcher is biased toward the standby position when at a position closer to the standby position than an intermediate position between the standby position and the turned position and biased toward the turned position when at a position closer to the turned position than the intermediate position. The catcher includes a hooking groove for the striker on a surface extending substantially perpendicular to a rotary shaft thereof. The hooking groove faces an introduction port toward the front side in the standby position.

Abstract: A cover for either a left-handed or right-handed operating automatic door closer including a body, and a pinion shaft extending from the top of the body, the cover comprising: a housing including a wall and an open rear, the wall having a rear edge and having therein first and second slots, each of the slots extending forward from the rear edge; and a clip including a base complementary to each of the first and second slots, and a flexible hook including a first end connected to the base and a floating second end, the base of the clip being insertable into either one of the slots so that the base substantially fills the one of the slots and the clip is secured to the wall of the housing with the hook positioned inside the housing and opening rearwardly; the housing with the clip inserted into one of the slots being positionable over the door closer with the hook of the clip receiving the door closer; wherein, when the housing is positioned over the door closer, the pinion shaft extends through the first slot

Abstract: A withdrawing mechanism includes a catcher 2 disposed on a main body with a swingable member D swingably assembled thereto and configured to capture a striker 1 moving from a front side when the swingable member D is swung toward a reference position; and a load response type damper 6. The catcher 2 is configured to be turnable forward and backward throughout between a standby position and a turned position and to capture the striker 1 in the standby position and turn forward up to the turned position. The damper 6 is configured to apply a damping force to a turning operation of the catcher 2 toward the turned position.

Abstract: A door holder and a door closer and, in particular, and improvements in door holders and closers for use in screen doors, storm doors or any type of door which has the need for a device for maintaining the door in a particular orientation and/or for self-closing of the door.

Abstract: Closer arm assembly includes a main arm having a first end fixed to the output shaft of a closer fixed to one of a door and a door jamb so that the main arm pivots when the output shaft rotates, and a connecting arm having a first end pivotably connected to the main arm and a second end connected to the other of the door and the door jamb. The connecting arm contacts a stop to limit relative pivoting of the arms, the stop including a cushion with a contact surface which suppresses noise as the connecting arm contacts the cushion. The stop can be in the form of a spring loaded bumper fixed to a soffit plate, or a pin fixed to the second end of the main arm. A hold open device can be fixed to the connecting arm for engaging a feature on either the soffit plate or the main arm, the hold open device having a spring loaded detent which is released by manually turning a knob.

Abstract: In a damped closing mechanism for automatic shutting pull door, a door closing mechanism includes a screw wheel to store restoring force, a change over device and a brake gear to produce a damping effect is integrally combined and equipped on the frame of a moving door panel. The brake gear is to alleviate the actuating force and moving speed of the door panel provided by the screw wheel. The change over device is capable of changing the damping effect of the brake gear to generate nearby the closing position of the door so as to alleviate colliding speed and impulse of the moving door panel with the door post when shutting without affecting the pulling of the door panel before closing.

Abstract: A catcher (2) provided in a door frame H? for capturing a striker body 1 moved from a near front side F when a door D? is rotated toward a reference position; a braking device (5); and a linkage device (3) for both are provided. The catcher (2) is provided to be reciprocatingly rotatable between a standby position and a rotated position, captures the striker body (1) at the standby position, and rotates forward to the rotated position. Braking of the braking device (5) is applied to a rotation toward the rotated position of the catcher (2) through the linkage gear member (30).

Abstract: A door closer includes a housing; an output shaft supported by the housing and rotatable in opposite door opening and closing directions; a cam disc disposed in the housing and mounted on the output shaft; a damping piston disposed in the housing; an opening piston disposed in the housing; first and second force transmission rollers; and two fixing bolts extending in the axial direction of the housing and transversely to the axis of the output shaft. The fixing bolts being disposed on two opposite sides of the output shaft, respectively. Each of the can disc and the first and second force transmission rollers has a circumferential recess or comprises two pieces, the fixing bolts being disposed in the recesses or between the respective two pieces so that each of the damping piston and the opening piston is prevented from rotating with respect to the cam disc.

Abstract: A door closer that integrally incorporates a door-opening-assistance device, and that therefore eliminates the need for unnecessary troublesome adjustment between parts, and whose number of parts is reduced, making said door closer compact. The door closer 1 includes a closer 1a that includes a pinion 5 that rotates in the forward and reverse directions when the door is opened or closed, respectively. A cylinder 9 is meshed with the pinion 5 and moves forward and backward. A closing spring 14 energizes the door in the closing direction via the cylinder 9and the pinion 5. A opening-assistance device 1b that includes an opening spring 22 that stores an opening force in the door-opening direction due to the movement of the cylinder 9 when the door is opened. Locking mechanisms 27, 28, and 29, that—when the door is opened—lock the opening spring 22 under an opening-force-storing condition. An unlocking mechanisms 23 and 24 that—when the door is closed—unlock the locking mechanisms.

Abstract: A non-contact apparatus removes translational energy (slows movement) of a first magnetic assembly when it is moved through the magnetic field of a second magnet. The first magnetic assembly contains a magnet that can rotate, such as a diametrically magnetized cylindrical magnet in a cylindrical cavity. Rotation of the first magnet does work against a predetermined drag. The apparatus also forms a non-contact magnetic coupling that holds a predetermined relative position. The apparatus can be used as a door catch that slows down and quietly stops a door at a predetermined position.

Abstract: A moving apparatus forcefully moves a movable body backward up to the position at the end of backward movement after moving it backward to a prescribed position during backward movement, and it has a pair of sliders having first slider and a second slider and an impelling device. In the position before forward movement of the movable body, the second slider is locked against sliding and the first slider is made free to slide by catching a first engaging part, and in the position at the end of forward movement of the movable body, the first slider is locked against sliding by a first slide lock part in a state having released the first engaging part, and the second slider is made free to slide in a state having caught the second engaging part.

Abstract: A slide channel for a door closer, comprising a guide rail for guiding a slide member connected to the door closer, and a cover element lined with the guide rail.

Abstract: Closer arm assembly includes a main arm having a first end fixed to the output shaft of a closer fixed to one of a door and a door jamb so that the main arm pivots when the output shaft rotates, and a connecting arm having a first end pivotably connected to the main arm and a second end connected to the other of the door and the door jamb. The connecting arm contacts a stop to limit relative pivoting of the arms, the stop including a cushion with a contact surface which suppresses noise as the connecting arm contacts the cushion. The stop can be in the form of a spring loaded bumper fixed to a soffit plate, or a pin fixed to the second end of the main arm. A hold open device can be fixed to the connecting arm for engaging a feature on either the soffit plate or the main arm, the hold open device having a spring loaded detent which is released by manually turning a knob.

Abstract: A shock absorbing device uses a damper including a cylinder enclosing a viscous fluid; a piston rod; and a piston dividing the interior of the cylinder in two axially separated parts. The piston is connected to the piston rod and has an orifice communicating the two parts. The piston includes an inner member integrally connected with the piston rod, and an outer member disposed about an outer perimeter of the inner member and configured to be axially movable with respect to the inner member. The inner and outer members are configured to define a gap therebetween through which the viscous fluid can flow, and to be biased away from each other by a spring disposed therebetween. The inner and outer members are arranged so that the gap is reduced as the amount that the inner member protrudes into the outer member increases, to thereby define a variable orifice.

Abstract: The invention relates to a damping device for parts of furniture which are joined together by means of hinges and which can be pivoted in relation to each other. The housing contains a damping fluid in the cavity thereof and a resistance element which can be displaced relative to the dumping fluid and connected to an actuating element protruding from the housing. During at least one part of the pivoting movement of both pieces of furniture, said actuating element is drivingly connected to the second piece of furniture and transfers the movement distributed to the second piece of furniture to the resistance element. The damping device is arranged in the region of at least one of the hinges which pivotally couples both pieces of furniture, and whereby either the damping housing and/or the actuating element engages with one of the mounting element of the corresponding hinges, at least during the damping process.

Abstract: Arrangement, in particular for a motor vehicle, having a closing device which can be pivoted about an axis between a closed and an open position, for example a boot lid or a tailgate, a compensating device acting on the closing device, in particular at least one gas-pressure spring, which is pretensioned and a counter-force opposes the weight of the closing device, and a motor-driven drive which can be operated at least unidirectionally, in particular bidirectionally, in order to pivot the closing device about the axis in at least one direction, wherein the motor-driven drive is designed to be repellable, in order to facilitate manual actuation of the closing device.

Abstract: A mechanical door closer (10) that includes a spring (20) mounted in a track (13) to urge the door (11) to a closed position. A brake assembly (24) controls that rate at which the door (11) closes. The brake assembly (24) includes a brake hub (25) that has ramp slots (32) that receive balls (33) that engage a braking shell (34) to cause the braking assembly (24) to frictionally engage the track (13) to thereby control movement of the door (11).

Abstract: A mine door installation has a frame installed in a mine passageway. At least one door leaf is mounted on the frame for swinging movement between open and closed positions. Movement of the door leaf is powered by a pneumatic actuator. A pneumatically-powered control system may be provided to control the door installation. The pneumatic control system may comprise a calibrated vent to shorten the delay in the response of the door leaf to direction from the control system to stop moving. The pneumatic control system may also comprise a limit valve to prevent the door installation from opening when a second door installation is open, thereby preventing both door installations in an air lock from being open at the same time.

Abstract: A door closer having a door arresting mechanism to arrest a door in an opened position that includes a cylinder and piston assembly wherein the arresting mechanism includes a cam member having an arresting dwell cam profile and an indexing profile, and an associated cam follower member wherein one member is connected to the piston rod and the other member to the cylinder so that one member is fixedly connected to either the cylinder or piston rod and the other member rendered rotatable relative to the fixed member so that the arresting mechanism is rendered self actuating upon the opening or closing of the door.

Abstract: A mine door assembly has a frame. At least one door leaf is mounted on the frame for swinging movement between open and closed positions. Movement of the door leaf is powered by a pneumatic actuator. The door installation also has a hydraulic checking system for controlling the speed of the door leaf as it moves back and forth between open and closed positions. A pneumatically-powered control system may be provided to control the door installation. The pneumatic control system may comprise a calibrated vent to shorten the delay in the response of the door leaf to direction from the control system to stop moving. The pneumatic control system may also comprise a limit valve to prevent the door installation from opening when a second door installation is open, thereby preventing both door installations in an air lock from being open at the same time.

Abstract: A door hold open and controlled release mechanism is designed for usage in a doorway system having an inner door, an outer door and a door closer. It includes a catch mechanism and a catch release mechanism. The catch mechanism holds the outer door, typically a screen door or storm door, in an open position against the closing tendency of the door closer. Movement of the inner door to an open position then toward a closed position triggers the catch release mechanism which allows the outer door to close under the urging of the door closer.

Abstract: An automotive closure panel which is rotatable about a pivot axis has an axial locator insert situated within a pivot bearing insert bore to set a margin extending between the closure panel and a vehicle body. This system is particularly useful for closure panels such as tailgates having torsion bar or motorized lift assist, because such systems are not easily disassembled for the purpose of setting the closure panel margins.