Abstract: A door closer and mounting bracket for attaching the door closer to either the door or the door frame. The door closer includes two pins at one end for engaging corresponding holes on the mounting bracket and the mounting bracket includes a resilient clip for engaging the body of the door closer.

Abstract: A gear driven dial indicator is used to indicate the door closer size for a door closer having an adjustable closing force. A drive gear is attached to the door closer adjustment screw. In the preferred embodiment, this drive gear engages a ring gear which is formed as part of the dial indicator. As the door closer adjustment screw is turned to change the door closer size, the drive gear turns with the adjustment screw. The drive gear then turns the planetary gear which turns the dial indicator, thereby changing the indicated size of the door closer.

Abstract: A closure device (4) for movable furniture parts is combined with a closure damping mechanism, which is formed by a fluidic damper. The fluidic damper is either a rotation damper (20) or a linear damper. The closure device, together with the closure damping mechanism, is constructed highly compactly.

Abstract: A door holder and stop which utilizes an elongated arm and track to retain the door in a closed position. The arm, through the use of a plate, is attached to a door frame. Pivotally and slidably connected to the arm is the track, having a return end and a closure end. The track is fixably attached to a door. At one end, the track has a locking mechanism for retaining the door in a closed position.

Abstract: A door closer and mounting bracket for attaching the door closer to either the door or the door frame. The door closer includes a lip at one end for engaging a corresponding hook on the mounting bracket and a screw passageway at the other end for engaging a screw on the mounting bracket. A unique mounting hole pattern is used to prevent installing the mounting bracket in the wrong orientation.

Abstract: A cylinder lock door closure device. In an exemplary application, the cylinder lock door closure device includes a cylindrical housing, a piston assembly, an arm assembly, a cylindrical catch piece and a hard stop whereby when a door is opened past 90° open, it will automatically lock in an open position. When the door is tapped toward the open position, the automatic lock will be released and the door returned to a closed position.

Abstract: A control mechanism includes a set of permanent magnets located within a cylindrical housing, the magnets being carried on a shaft which extends within the housing and is movable axially relative to the housing. The magnets are arranged in repulsion configuration and are coupled to the shaft and moved together as the shaft is moved relative to the housing manually from a stationary or retracted position to an extended position. Upon release of the shaft, repulsion forces produced by the magnets cause the magnets to move apart, moving the shaft relative to the housing from the extended position to the retracted position. In one embodiment, the control mechanism is coupled between a door and a door frame and operates as a door closer. In other embodiments, the control mechanism operates as an opening mechanism for opening the cover of a container, the opening mechanism also acting as a closer as the cover is being closed, to assist in closing the cover.

Abstract: A door closer and mounting bracket for attaching the door closer to either the door or the door frame. The door closer includes a lip at one end for engaging a corresponding hook on the mounting bracket and a screw passageway at the other end for engaging a screw on the mounting bracket. A unique mounting hole pattern is used to prevent installing the mounting bracket in the wrong orientation.

Abstract: A locating structure of an oil pressure door closer is composed of a locating plate, a main body of the door closer, and a plurality of fastening pins. The locating plate is fastened with a door and provided with a plurality of fastening holes. The main body is provided in one longitudinal side thereof with two longitudinal edges parallel to each other and forming therebetween a longitudinal space for accommodating the locating plate. The two longitudinal edges are provided with a plurality of through holes corresponding in location to the fastening holes of the locating plate. The fastening pins are received in the through holes and the fastening holes for fastening the main body with the locating plate.

Abstract: A device (10) designed to be placed between a gate (12) and a powered actuator (16) to permit release on command and free movement of the gate with respect to the actuator. The device comprises a first plate (11) designed to be fastened to the gate and a second plate (17) designed to be connected kinetically to the actuator. A first and a second plate are supported to rotate freely around a common rotation axis (13) designed to coincide with the gate rotation axis. Means of bolt engagement (18) are arranged to engage between them a first and a second plate to make them integral. Two operating levers (19,20) each arranged on one side of the device and having cam surfaces (31,32) to cause independent backing of the bolt (24) of the engagement means (18) against the thrust of elastic means (25) to move it towards a disengagement position upon movement of one of the two operating levers from a rest position to an operating position. Locks (22,23) can be provided to prevent inappropriate operation of the levers.

Abstract: A cover device for a door closure mechanism includes a detachably mounted shell which has a generally C-shaped cross section and is formed by an elongated wall. The wall has an inside surface which terminates laterally in opposing side edges. An elongated trough extends adjacent the inside surface of the wall and is adapted to receive the door closure housing. A pair of opposing jaw members protrude from the inside surface of the wall adjacent each of the side edges respectively. The opposing jaw members define a lateral opening, the lateral opening is smaller than the diameter of trough. The jaw members are resiliently or elastically deflectable in an outward direction to enlarge the throat opening so as to permit the door closure housing to be inserted laterally into the trough. Once the jaw members have been deflected over the full diameter of the housing, the jaw members spring inwardly to frictionally retain the cover on the door closure housing of the door closure mechanism.

Abstract: A door control device for use on a non-fire side of a fire-door mounted in a door frame in a fire-door safety installation has a door closer assembly filled with a hydraulic damping fluid and attached to a non-fire side of the fire-door by at least one fastener; a door control arm pivotally connected to the door frame at a first end and to the door closer assembly at a second end; and the hydraulic damping fluid is one of a group of fire resistant hydraulic fluids.

Abstract: The subject invention is a delay door closer that is to be used in conjunction with a dual door arrangement such as a screen door mounted in conjunction with an entry door of a house or other building. A catch mechanism is mounted on the door jamb with the catch mechanism functioning to lock and hold the screen door in an open position when the entry door is in the closed position. Upon opening of the entry door a sufficient amount to where the user is now able to enter the building, the catch mechanism is disengaged which will cause the screen door to be moved from its open position to a closed position.

Abstract: A hinge structure of rotary door, including a mechanical rotary hinge and a buffering rotary hinge inserted in a hinge casing. An upper section of the rotary shaft of the buffering rotary hinge is formed with two opposite ring seats. A flange body is slidably fitted around the rotary shaft between the ring seats. An upper and a lower edges of the flange body and the ring seats are respectively disposed with corresponding projecting wedge edges and recessed wedge edges so as to lift or lower the rotary shaft along with the opening or closing of the door. A flange body is formed with an insertion hole and the ring seat is formed with a slide slot to be inserted in the casing. A piston body disposed with oil seal ring is fitted with the end of the rotary shaft to be slidably disposed in an oil cylinder. The piston body is formed with an annular groove communicated with a lower chamber by several through holes for fast opening the door.

Abstract: A hydraulically damped door closer is described which has a relatively weak closer spring (3c) and stronger back-up closer springs (3a, 3b). If, after a predetermined time period, the door does not arrive in the closed position under the effect of the closer spring (3c), the back-up closer springs (3a, 3b) are connected for the closing. Their connection is therefore controlled by way of a time function element, which represents a simple and, at the same time, reliable control.

Abstract: An automatic door closer has a piston assembly dividing a housing into two pressure medium chambers. The piston assembly is moveable by a cam roller in camming engagement with a cam that rotates during an opening or closing movement of a door. The piston assembly includes two parts, a coupling part and an outer part. The coupling part provides for connection to the cam roller and the outer part seals one pressure medium chamber from the other pressure medium chamber. The coupling part and the outer part are connected firmly together by a connecting element.

Abstract: This invention is directed to a door closer which is rendered optionally operative to effect either a controlled closing of the door upon opening or to automatically latch or arrest the door in the open position as may be desired. This is attained by a closer housing having a cylinder chamber and a connected latching chamber in which a piston is reciprocally mounted in the cylinder chamber which is biased by a compression spring toward the closed position. The piston rod connected to the piston extends through the end of the latching chamber and a latching member and an associated recoil spring is slidably disposed on the piston rod within the latching chamber. An arming device extends into the latching chamber which is shiftable between an armed position and an unarmed position.

Abstract: Disclosed is a top mounted interior door closer utilizing as a drive mechanism a yieldable actuator which is exercised during the opening and retraction which is desirably mounted in an encasement having a closing rod extending from one end. The closing rod is secured to a pair of flanking members along a vertical axis, which members, in turn, are positioned for movement in a track. The closer is sandwiched in place interiorly by having elongate slot at the top of the door means of a cover plate. The elongate slot passes a closing link pin pivotally secured to the shaft or bushing joining the rollers or blocks.

Abstract: An apparatus and method of providing improved attachment and securement for a reciprocating operative device stability control bracket (26) which comprises an arm structure (32) connected to a basal structure (28), and functions from a predetermined location which is proximal to the edge (38) of a surface (36), the improvements including a reinforcement basal attachment plate (10) of larger dimensions than the basal structure (28) of the stability control bracket (26) whereby a fastening means (12) is provided; a chambered area (14) providing securement for said basal structure (28) of the stability control bracket (26); and a primary slot (20) for accommodating the protruding arm structure (32) also of the stability control bracket (26). Furthermore, the exterior edge (16) or any interior edge (17) of the chambered area (14) may provide a secondary slot (24) whereby the stability control bracket (26) may optionally mount and demount.

Abstract: An automatic revolving door drive is described, with a hydraulic piston-cylinder unit with a closing spring and an opener motor, consisting of an electric motor and hydraulic pump. It is a so-called servo closer, with which the door is opened with motor support and automatically closes with hydraulic damping under the influence of the closing spring.In order to be able to use even low-powered opener motors and to produce a relatively compact design, provision is made such that during the motorized opening process the pressure of the hydraulic medium is regulated with adjustment to the prevailing force of the closing spring, in which the closing spring that cooperates with the piston abuts the piston at one end and a hydraulic pressure cushion at the other end, with the same hydraulic pressure being set and regulated by a special pressure-regulating valve in the pressure chamber and in the hydraulic pressure cushion.

Abstract: A door closer having a spindle and cam arrangement for driving a cam plate longitudinally within a housing filled with oil, and dual rods connected to the cam plate at one end and to two pistons respectively at an opposite end. The pistons are reciprocal within cylinders having speed valves in flow communication to opposite sides of the pistons. Dual springs are arranged, one around each rod and compressed between the pistons and a fixed compression plate within the housing. A single adjusting screw extends from a front end of the housing to a threaded central aperture of the compression plate. Rotation of the adjusting screw sets the initial spring compression force of the return springs which influences the rate of closure of the door and the preload force of the door to the door frame.

Abstract: A door closer employing a cylinder having an end attachable to a door or door frame and slidably retaining a piston biased by a spring to a maximum retracted position in the cylinder. One end of a rod is attached to the piston and the other end extends from the cylinder and is attachable to a door frame or door. Confined to a short longitudinal space in the cylinder and riding on the rod, is a cantable washer. Structural members at the ends of the washer space in the cylinder maintain the washer in an essentially perpendicular orientation on the rod so that it may slide through the washer freely as the door is opened or closed. A positionable support, longitudinally buttressed from the cylinder, is introducible into the washer space so that the support may contact the washer on initiation of retraction of the rod into the cylinder causing the washer to cant, arrest the piston rod, and hold the door open. To unlatch the door, the positionable support is withdrawn to avoid canting contact with the washer.

Abstract: A hydraulic operating device for gate movement comprises a gate pintleing unit (10) comprising a box (11) with rotating support body (37) for a shaft (12) having a first gear (20) integral therewith projecting into the box. The shaft (12) faces at the top a box (11) with one of its axial fixing ends (15) integral with the gate rotation axis. The device also comprises a hydraulic operating unit made up of a drive element (25) consisting of a central body (32) from which project opposed hydraulic cylinders (26,27) in which run respective pistons (28,29). Between the pistons is connected a rack (30) traversing the central body (32) to project laterally therefrom with its teeth. It is thus possible to prepare a gate for future automation by mounting only the box and subsequently inserting therein the operating unit.

Abstract: A mechanism for controlling the opening and closing of a closure object, comprising an outer cylinder whose inner chamber, contains hydraulic fluid, a distal end of the outer cylinder being attachable to either a closure object or an object to be closed. A circumferential single groove is located in an inner wall of the outer cylinder and a piston shaft telescopically received within the outer cylinder extends proximally therefrom, being attachable to either a closure object or an object to be closed, and distally into the inner chamber. A piston head is mounted distally on the piston shaft. The piston head contains a bore therethrough, a peripherally located circumferential retaining groove, and an inclined outer surface which increases in cross section in the distal direction. A seal prevents hydraulic fluid from passing around the piston head between the distal chamber and the proximal chamber. A snap ring, partially housed within the single groove, engages the inclined outer surface of the piston head.

Abstract: Surface mounted apparatus for closing a door that is hinged along a side thereof includes a commercially available spring powered closer unit that is mounted within a heavy duty outer housing secured directly on the door. A pivoted linkage is connected between the closer unit and a bracket secured directly on a door jamb. The linkage is constructed of heavy duty arms and pivot pins are mounted permanently as by welding. A stub shaft on the linkage extends through a tiltable bearing unit into the outer housing to engage the output shaft of the closer unit. Extensive use is made of tamper resistant fasteners to secure elements together and to mount the outer housing and the bracket.

Abstract: The invention provides a biasing device for biasing a movable first structure to a position relative to a second structure, said biasing device includes aconnection mechanism for interconnecting said first and second structures, said connection mechanism including at least one motion reducing mechanism; andextensible and/or compressible biasing means for providing a biasing force;the biasing means is connected between said first or second structure and said motion reducing mechanism so that the length of extension or compression of said biasing means is less than the movement of said first structure relative to said second structure.

Abstract: A door closing system includes a foot actuated pedal positioned conveniently near a vehicle door to be actuated, a flexible member having one end coupled to the pedal and a spring and interference fitting for coupling the flexible member to the door such that actuation of the pedal will provide a force to the door tending to close the door.

Abstract: A door holding mechanism for use with closure devices, having interacting members connected to the door that selectively, by touch, effect locking or sliding movement to permit unrestricted door movement or rigid positioning in one or more positions.

Abstract: Disclosed is a door control device that automatically repositions the driving shaft of the door closer toward and away from the door pivot, as the door opens and closes, as a means of modifying and improving the force required to open and close the door. Movement is accomplished by a double ended driving shaft having a sprocket gear on one end which drivingly engages a track which in turn repositions the slide mounted door closer to more favorable positions as the door opens and closes.

Abstract: An arm for a door closer includes a shaft rotatable about a first axis. The arm includes a first arm member having a first end connected to the shaft and rotatable therewith. A second arm member has a first end pivotably connected to a second end of the first arm member and a second end pivotably connected to a mounting bracket. The second arm member includes an open ended axially movable housing member having radially inwardly extending detent. A clamp has a first end forming the first end of the second arm and a second and forming radially expandable jaws of the clamp. The detent on the housing when disposed in a first axial position maintains the jaws in a closed position and when moved to a second axial position permits the jaws to radially expand. A link has a first end forming the second end of the second arm and a second end. A joining member is connected to the second end of the link and extends towards the clamp.

Abstract: A door closer has a cam surface on its pinion shaft. A lever mounted thereadjacent works against the shaft, and when the door is closed, engages a switch to indicate remotely the condition of the door. The lever fulcrum is mounted on an eccentric arrangement so that the change from "door closed" to "door opened" position can be set at a precise point.

Abstract: Disclosed is a tamper resistant assembly of a roller or slider in a track that can be used advantageously in schools, public buildings, detention facilities and the like; wherever the potential for vandalism and mischief is likely. In the present device the track is provided with unique sloped ends which expel, up and out, any foreign material placed in the track as it is moved along by the roller or slider toward the end of the track where it would ordinarily jam.

Abstract: An improved door closing device has a door closer main body for exerting a closing force on a door, a guide rail for guiding a slider, a tension spring provided in the guide rail and a releasably connecting device for releasably connecting the tension spring with the slider at a certain angular position of the door whereby a closing force can be additionally exerted near a position where the door is completely opened.

Abstract: A new type of hydraulic door closer is disclosed. The device of the present invention utilizes spring force and hydraulic pressure, and is equipped with a straightly extending arm instead of the conventional type of the folding arms. The advantages of the device of the present invention are that variations of the size of the device are not required for different sizes and weights of doors, and the lack of the folding portion of the arm enables avoiding of wear and stress on the critical parts. Another advantage of the device of the present invention is that different door opening ranges are provided such as 80 degrees, 90 degrees and 100 degrees in addition to a free moving zone.

Abstract: A door closer is disclosed having an operating arm with a track traveler which mounts a plurality of rollers. The rollers engage between them the opposite sides of a track on the door. The opposite sides of the track each have outward concave faces. The rollers are ball-shaped, conforming to the faces of the track. A door holder is also disclosed which may be adjustably fixed at a position along the track, the traveler and the holder having the mating parts of a snap fastener which, when engaged, hold releasably the door at a fixed hold-open position.

Abstract: A door closer includes a plate-shaped mounting bracket and a closer body. The bracket is secured to a door. The closer body is secured detachably to the bracket by a particular tongue and groove engagement and a fastener. The closer body has an opening which is sized so that the bracket can be completely concealed by the closer body. After the fastener is removed, the closer body can slide within the bracket. The closer body has two opposed side walls each having an inner surface which has longitudinally spaced-apart grooves. The bracket body has two opposed sides on each of which spaced-apart tongues are provided for engaging with the grooves. The closer body can be sleeved on the bracket and then moved laterally relative to the bracket so as to achieve the tongue and groove engagement.

Abstract: A door closer for a sliding screen or door which can be vertically mounted on the vertical non-movable frame of a doorway. A tension cord extends inwardly from the door-opening to be secured to the inboard end of a sliding screen or door whereby automatically to pull the screen or door across said opening. The closer does not obstruct the opening when said screen or door is in open position.

Abstract: A door holding mechanism having interacting members with cooperating cam surfaces that selectively, by touch, effect locking or sliding movement to permit unrestricted door movement or rigid positioning in partial open conditions.

Abstract: A gate latch is described for maintaining a wire gate in a closed position between a pair of gate posts embedded in the ground. The gate latch comprises a support which is nailed to the upper end of one of the gate posts and which has one end of a lever pivotally secured thereto. A U-shaped connector is pivotally secured to the lever and is adapted to be extended over the upper end of the end post member of the gate. The lower end of the end post member is inserted into the U-shaped connector secured to the lower end of the associated gate post. Pivotal movement of the lever causes the upper end of the end post member to be drawn or pulled towards the gate post. When the lever is in its locked position, an "over-center" condition is achieved to maintain the gate in its closed position.

Abstract: A door assembly describing a stationary frame having doors mounted therein for relative translational movement. Each door includes a self-closing mechanism comprising a flexible tubular member affixed at one end to the frame and a follower secured to the other end of the tubular member for loose positioning in an active position adjacent a side of the door for urging the door in a closed position, and a self-opening means comprising a similar flexible tubular member affixed at one end to the frame and a follower secured to the other for loose positioning in an active position adjacent an opposite side of the door for urging the door to a fully open position. The self-closing and self-opening mechanisms both are adapted to be deactivated as an incident to positioning the door to respective locations within the mounting frame.

Abstract: A jamb plate is mounted between the jamb bracket of a conventional door closer and the door jamb to prevent the door closer from tearing away the door jamb.

Abstract: In a door closing device for an upper lock a bar structure is provided for interconnecting a shaft of the door upper lock with a door wing. The bar structure includes a main arm and an adjusting arm pivotally connected to the adjusting arm. The adjusting arm is comprised of telescopically displaceable outer and inner bars which can be locked in position by a locking member. The locked position of the bars relative to each other is secured by a slidable tube surrounding the outer bar and securable to the inner bar.

Abstract: A door closing apparatus is described which embraces a unit for generating a closing force, a lever attached thereto via a releasable clutch for actuating the door and a controllable blocking device. The releasable clutch consists of a threaded connection which permits relative rotation between the actuating lever and the drive axle over a predetermined stroke. An abutment for frictionally locking the actuating lever is provided, with the frictional locking abutment becoming effective relative to the actuating lever at at least one end of the stroke. The holding force which sets in between the actuating lever and the frictional locking abutment is smaller than the holding force of the blocking device which blocks the unit for generating the closing force in the closing direction.

Abstract: An axially extending closer shaft for a door closer is made up of an axially extending first section mounted in a door closer housing and an axially extending second section aligned with and connected to the first section and located outside of the housing. A plurality of annular grooves are formed in the second section extending perpendicularly of the shaft axis and spaced apart in the direction of the shaft axis. The second section can be cut to the desired length in the plane of one of the grooves. The first and second sections can be connected together by a plurality of bolts extending in the axial direction of the shaft or by a single shaft and coupling balls positioned within recesses in the first shaft and in bores in the second shaft.

Abstract: An automatic door closer comprises a closer shaft connected to a door for turning therewith and being turnably mounted in the region of one end of an elongated fluid-filled housing. A cam disk fixed to the closer shaft cooperates over rollers carried by a slide to move the latter and a piston rod fixed thereto during opening movement of the door in a first direction. A first piston arranged in the housing divides the latter into a first and a second pressure space and is connected to the piston rod passing through a bore in the first piston for moving therewith in the first direction to thereby reduce the volume of the first pressure space while increasing the volume of the second pressure space. A coiled compression spring arranged about the piston rod biases the first piston to move in a second direction opposite said first direction. A second piston fixed to the free end of the piston rod projects beyond the first piston into a cylinder space formed in a plug closing the other end of the housing.

Abstract: An automatic motorized door closure having an arm freely movable on a motor shaft in response to opening a door and after a time delay being connected to the motor shaft and automatically moving the door to a closed position.

Abstract: A railway house car is provided with a sliding door and door driver. The door driver includes a lock having a door mounted hasp and upper and lower bracket portions mounted on a fixed door post for common engagement with a locking pin. The lower bracket portion has a pivoted manual lever mounted thereon with a crank arm for providing an increased mechanical advantage. The crank arm extends downwardly to pivotally and drivingly engage a door latch carried on an inner surface of the crank arm. The door latch has an opening on its end opposite the crank arm for selective connection to a flanged boss mounted on a vertical door edge reinforcement member. The lever with its crank arm and the door latch may be made from plate steel.

Abstract: Door closer of the type which holds the door open until an associated electric circuit is opened or closed. Provides means for free swinging of the door when the door closer is "cocked". This is achieved by a drive plate interposed between the closer shaft and its operator arm. The plate provides a pair of apertures which may selectively retain a pin adapted to work against the closer arm.

Abstract: The closing mechanism of an automatic door closing arrangement is partly enveloped by an elongated unitary casing of sheet metal. Flanges on two of the longitudinal casing walls bound therebetween an opening in the casing which may be closed by a panel releasably retained by the flanges. Provisions are made for attaching the casing to a door and for linking the output element of the closing mechanism to a door frame. The panel may be removed simply and without tools for access to the mechanism or for replacement by another panel of different decorative appearance.

Abstract: A generally box-shaped main body or a housing of a door closer is snap fitted on or demounted from a mounting plate of a generally U-shaped or channel shaped form with two position control wall portions extending from opposite ends of a generally flat base portion, and the wall portions contacting the opposite side walls of the main body in face-to-face contact.