Abstract: A door closer unit (100) including a cylindrical housing (10) with a partition (14) axially extending inside and having a first liquid path; a moving body (20) with a movable barrier (24) dividing the interior of the housing into first and second chambers, and a rotational shaft (21) having an upper end extending upward; a door return spring (30) applying a recovering force to the door in a direction opposite to the direction when the moving body's rotational shaft (21) or housing (10) rotates in one direction; a high-viscosity liquid filling in the housing; a control check valve for opening a second liquid path when the door is opened, and closing the second liquid path when the door is closed; a cover (40) rotatably supporting the rotational shaft (21) of the moving body (20) and sealing the upper portion of the housing (10); a speed controller (19) regulating the amount of the liquid when the door is opened or closed, thus controlling the speed of the door; and a door stopper (29) for stopping the door whe

Abstract: A door closer with a door piston, which door piston is acted on by a driven shaft during the opening of a door. The door piston has an extension attached to it. The door closer also can have a pressure piston and an energy storage mechanism which acts on the pressure piston. The pistons can be axially guided and can interact with hydraulically connected pressure chambers to connect and disconnect the pistons during the opening and closing of the door closer.

Abstract: A doorstop system with an angled lower face comprising a top face in a rectangular configuration with long side edges and short front and rear edges, two side faces in a generally triangular configuration, each side face having a lower horizontal edge, a short vertical front edge, and a large generally vertical rear edge and an angled upper edge. Included is a five-sided front face with a horizontal upper edge and short vertical side edges and two angled lower edges, one lower edge being longer than the other lower edge; a five-sided rear face with a horizontal upper edge and long vertical side edges and two angled lower edges, one lower edge being longer than the other lower edge. Finally, two bottom faces are provided, each bottom face being in a rectangular configuration, one being larger than the other.

Abstract: A hold-open device for a door provided with a closing mechanism comprises an operating arm connectable at one end to the closing mechanism, a guide track, a sliding unit movable in the guide track and connected to the opposite end of the operating arm, and a retainer unit mounted in the guide track. The retainer unit includes a body part held in the guide track at a selectively adjustable position therealong, a holder piece turnably journalled at one end region to the body part, a spring urging the holder piece toward a position in which its opposite end region can engage the sliding unit, and an adjustment member effective between the body part and the holder piece for limiting turning movement of the holder piece relative to the body part.

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: A plate that is attached to a shaft to remove a door closer from the door completely. A door holder is used to set the plate in an "open" position, out of the way of the door. Once the plate is in the open position, the door is free to open and close without any force on it at all. If there is an emergency, the door holder releases the plate. The door closer then moves the plate against the door and closes the door. Once the door is closed, the plate can be reset by opening the door until the door holder is again engaged. In this way, people can operate the door without exertion while they are protected from emergencies.

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: The present invention discloses door closers provided with automatic latching in any position along the stroke, and delayed action mechanism together with a mechanism to switch on and off the automatic latching and the delayed action operation modes. The function, on which the automatic latching and the delayed action functions are based, are described in detail and examples of embodiments in door closers provided with either automatic latching or delayed action or both are also described.

Abstract: A blocking device for preventing a door closer from achieving a degree of rotation corresponding to a door hold-open position. A blocking device is provided which can be selectively protruded into a door closer housing to block the translation of a cam plate under influence of a rotating cam operatively connected to one of either the door or the door frame such that the 90.degree. or 105.degree. typical door hold open position cannot be achieved. The blocking device can be a rotatable limit bar which can be positioned to an interference or no-interference position, or it can be screw pins which can be threadingly inserted into the housing to block either the cam or other moving portions of the door closer such that the closer cannot achieve the door hold open position.

Abstract: In a brake device of a linear moving body, a brake member is provided with a hole and a rod is fitted to the hole in clearance fit, and the brake member is moved slantwise and rotational moment is produced in the brake member thereby brake is applied to the rod in relative motion. The brake member is arranged movable slantwise using position as fulcrum remote from the axial center of the rod, and notched portions having width smaller than diameter of the hole are formed at symmetric positions within the hole along a plane including the fulcrum and the axial center of the rod. In this brake device, rotational force (rotational moment) is supplied to the brake member, and drag is produced at a fitting surface within the hole and frictional force due to the drag is made brake force and frictional force due to the drag of the fitting surface is made reaction force of the rotational force.

Abstract: A safety device for automatically preventing a door accidentally closing completely. The door comprises at least one panel (2) provided with an actuator member (3) and hinged in a doorframe (4, 5, 6). The safety device comprises a moving member (10) displaceable between a safety position in which it prevents the door closing completely and a closure position in which the door can be closed, the moving member being connected (20) to the actuator member such that actuating the actuator member displaces the moving member towards its closure position.

Abstract: A locomotive engine top deck cover support apparatus for supporting the top deck cover of a locomotive engine in a selective position, has a ratchet member with a plurality of radially disposed ratchet teeth and a support arm pivotal between a fully raised and fully lowered position. The support arm supports a reciprocal pawl which is biased into engagement with the ratchet member.

Abstract: An apparatus for controlling the position of a door suitable for use in association with door closing piston assemblies having a spring-biased reciprocable door closing piston rod and a latch plate transversely slidable along the length of the piston rod. By use of the present invention, a momentary initial rotational bias may be imparted to the latch plate automatically and electronically, thereby causing it to shift the latch plate towards a rotated angle while the door is closing, and to facilitate pre-positioning the latch plate to set into a locking hold-open orientation without any subsequent manual adjustment.

Abstract: A door stopper device comprising a central post having an upper component and a lower component formed of a rigid material, the lower extent of the upper component being linear and of a reduced diameter and the upper extent of the lower component being linear and of an enlarged diameter to receive the lower extent of the upper component; a U-shaped fork formed in the upper extent of the upper component, the fork being positioned vertically with respect to the door to be maintained closed with the adjacent component formed at an obtuse angle with respect thereto; a vertical foot formed at the lower end of the lower component; and spring-urged locking components coupling the area of overlap between upper and lower components.

Abstract: A door closer being affixable to a door for closing the door. A channel having a slide therein for engaging with a detent also in the channel for holding the door open. The slide is connected to an arm of the door closer which arm moves the slide along the channel into contact with the detent which holds the door open once the detent and the slide have engaged with one another.

Abstract: A gas spring is connected between a cabinet and a lift-top lid and releasably holds the lid upwardly in a fully open position with respect to the cabinet. Gravity automatically pivots a safety latch into latching relation with the cylinder of the gas spring as the lid approaches its fully open position. If the gas spring loses pressure, the latch operably engages the cylinder to mechanically hold the lid in its fully open position and to prevent the lid from falling toward its closed position.

Abstract: A mechanism is provided for maintaining an open door in a selected fixed position includes a keyed shaft which passes through a plurality of elliptically shaped discs via apertures centrally located in the discs are mounted. The long axis of each disc is aligned to that of the other discs and the discs are pressed together from either side along the axis of the shaft between two compression springs. Angled stop members located to the outside of the compression springs displace the discs along their long axis at a small angle from the plane perpendicular to the shaft. The small angle is chosen to produce a substantially circular projection of the discs in a plane perpendicular to the shaft. The shaft, with its mounted discs, springs, and angled stop members, is placed within a housing of cylindrical cross section having an interior diameter selected such that the discs are in frictional contact with the internal surface of the housing and the shaft is thus slidably but frictionally disposed in the housing.

Abstract: A door holder that includes a holding member adapted to be secured between the door and a frame of the door. The holding member includes a lever that may be clamped in either a first released position in which the door is freed to be opened and closed or a second holding position in which the door is held open. A foot operated actuating means operated by a user controls the lever to move it into a clamping position to hold the door open.

Abstract: In a door fastener for motor vehicle doors, whose rigid door holding bar, which is fixed at a door arrangement part, penetrates a holder housing in the other door arrangement part and is supported on the one hand against a rigidly supported abutment roller and is acted upon by means of a loading roller which is supported on the free loading arm of a torsion bar spring supported in the holder housing, the two rollers are equipped on both sides with a lubricant reservoir, which is accommodated in caps which are clipped on on the front sides of the rollers and is sealed relative to the respective bearing axis of the roller by means of sealing lips constructed at the caps.

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: A double-winged door spring is biased for closing with a mechanism for damping of the closure movement and includes a closure sequence control, particularly of a fire-resistant door, in which the damping of the movable door portion is accomplished through a hydraulic damping element with throttled overflow. The hydraulic damping element includes two oppositely controlled pressure chambers defined by a double-acting piston and a valve disposed in the overflow conduit connecting the two pressure chambers, the valve being actuated directly or indirectly through the stationary door portion. By the valve being disposed in the overflow conduit, actuation of the movable door portion can be inhibited until the stationary door portion is closed.

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 completely mechanical hold open device for a swingably mounted vehicle closure includes a pair of telescoping members pivotally connected to the closure and vehicle body and a releasable latching means for automatically holding the telescoping members in an extended position and hence the closure in its open position. The latching means is constructed such that it can be automatically released by merely exerting a downward force in excess of a predetermined magnitude on the closure to move the latter to its closed position.

Abstract: A wedge assembly to be secured to a vehicle door to prevent door rattling during vehicle operation. A slide element is captured by a base plate and stops are provided to prevent inadvertent disassembly.

Abstract: A completely mechanical hold open device for a swingably mounted vehicle closure includes a pair of telescoping members pivotally connected to the closure and vehicle body and a releasable latching means for automatically holding the telescoping members in an extended position and hence the closure in its open position. The latching means is constructed such that it can be automatically released by merely exerting a downward force in excess of a predetermined magnitude on the closure to move the latter to its closed position.

Abstract: A door closer is set forth having a housing, a plunger rod in the housing with a plunger at the inner end of the rod, and a main spring around the rod between the plunger and a housing end for urging the rod into the housing. An actuator carried at the housing end with an opening for the rod and mounted for transverse sliding motion relative to the rod, with a spring for urging the actuator into a latch space in the rod is utilized. With the door closer connected to a door, the actuator slides into the latch space when the door has been opened, to hold the door open. A further opening movement raises the actuator out of the latch space and a sleeve maintains the actuator raised, permitting closing of the door.

Abstract: A toilet lid closing device for use on toilets of the type having a vertical tank with a flushing lever, a bowl, a seat and an overlying lid pivotally mounted by a hinge pin, has a torsional coil spring received around the hinge pin which biases the lid and the seat to a closed position. A channel shaped bracket has a horizontal mounting surface secured by the toilet seat mounting bolts, with perpendicularly attached parallel support legs for mounting end portions of a pair of dampening cylinders. An adjustment bracket allows independent adjustable positioning of the dampening cylinders. Each of the dampening cylinders has an extensible rod provided with a circumferential groove for engagement with a spring biased locking pin which retains the rod in a extended position. End portions of the extensible rods have journal bearing ends received on mounting pad axles secured to the underside of the lid and the seat.

Abstract: Automatic door closers have a latch mechanism for holding the door open. In one mode of operation, the latching of the door is effected automatically when the door is opened. Tapping the door closer cylinder upwardly releases the latch mechanism and allows the door to close. Manual manipulation of the latch mechanism is required to latch the door open in a second mode of operation. However, in this mode of operation, the latch mechanism can be released simply by opening the door slightly beyond its latched position. The door closer includes a cylinder with a rectilinearly displaceable piston rod housed therein and extending through one cylinder head; and the latch mechanism comprises that cylinder head and a notch in the piston rod into which cylinder head is fitted to keep the piston rod from telescoping into the cylinder. The opposite end of the cylinder and the exposed end of the piston rod are attached to the door and the door frame.

Abstract: A releasable door hold-open mechanism, for use with a door closer, is disclosed. The mechanism employs a latch assembly, mounted in a track which defines a predetermined path for a slider shoe associated with a door closer arm. The latch assembly employs a pair of reciprocable rollers, associated with a solenoid activated clevis. When the solenoid is actuated, the clevis maintains the rollers in a latching position, in which they can capture and hold a wedge associated with the slider shoe. Deactivation of the solenoid permits release of the wedge, and the force of the solenoid can also be overcome manually to release the wedge. The latch assembly is selectively positionable in a broad range of positions within the track, to determine the angular position of the door at which holding occurs.

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 mechanism which prevents a door from closing by blocking the door hinge from closing.

Abstract: A device which allows a choice of stopping positions for a swinging door mainly comprises a body having a cylindrical well together with a passage hole vertically formed through the body, an operation means includes a plunger normally supported by a spring, a friction body received under the plunger. Said plunger can be plunged repetitively between a suspension position where the friction body is suspended properly above the ground and a stop position where the friction body is pushed in association with the plunger to touch the ground to stop the door at a selected position through friction effected between the friction body and the ground.

Abstract: A storm door lock apparatus is set forth wherein a clamp is secured to an associated screen-door type closure member that further secures a slidable rod mounted with an abutment surface for actuation by a user with a pivoted lever at the other end of said rod for canting about a piston rod associated with a door closure. Additionally, a generally "L" shaped link is securable to the abutment member for allowing engagement and access by a user.

Abstract: A closure check for temporarily bracing open a conventional cylinder/piston mechanism. The closure check comprises a longitudinal brace, positioning means, engagement means and disengagement means. The closure check can automatically engage with the cylinder/piston mechanism or can be engaged manually by a user.

Abstract: A door holder-closer comprising a conventional door closer and a novel electromechanical door holder attached to the drive spindle of the door closer. The door holder features a lever which is coupled to the drive spindle of the door closer by an adjustable clamp comprising mating rotor and cone elements. Both the rotor and the cone are seated over the drive spindle with the cone being fixed to the spindle. The rotor is formed with a projecting rotor tab which is selectively engaged by a pawl. The lever is formed with a notch which selectively engages a roller driven by an electromagnet-actuated armature. The motion of the door closer spindle is restrained by a primary latch formed when the roller is seated within the lever notch in response to an energized electromagnet, and by a secondary latch formed when the pawl engages the rotor tab. The primary latch supports and controls the secondary latch. Hold-open door control occurs when both latches are in effect concurrently.

Abstract: A door security device which is mounted in the floor or other flat surface in the arc of passage of a door which can be operated solely by one's foot. The door security device includes a housing with a flange plate which is mounted in the opening of the floor surface. A stop member is provided within the housing which assumes two alternate positions, a lowered position and a raised position. In the lowered position, the door is free to move through its arc of passage without obstruction by the door security device. By pressing down on the principal surface of the stop member, a latching mechanism is actuated which allows the stop member to be spring biased into the open position. In the open position the stop member obstructs the motion of the door through its arc of passage so that the door can be opened only a limited distance.

Abstract: A control mechanism for a door of a motor vehicle is described that is actuated via an inside and outside handle and comprises a piston-cylinder unit arranged between a door post and the vehicle door. It has a piston provided with passage openings for a pressure medium, the piston interacting with an interior valve that separates two working chambers of the cylinder from one another. The control mechanism is equipped with a blocking valve controlling the medium flow, this blocking valve being arranged in a control circuit connecting the two working chambers of the cylinder, acting against the flow direction. This blocking valve, via a control element at a door handle, can be controlled in such a way that the door is blocked in at least one intermediate position. The cylinder has at least one overflow duct between the two working chambers, the flow-through of which is controlled by the piston of the unit. The duct extends over an area into which the piston dips, up to a door opening angle of about 30.degree.

Abstract: A door check wherein a housing is affixed to the pivotable panel and a guide rail is affixed to the frame of a door. The housing contains a shaft which is rigidly connected with one end of an arm the other end of which is slidably guided by the rail. The shaft carries a disc cam having two asymmetric sections one of which is tracked by a spring-biased follower surrounding an antifriction bearing and tending to return the panel to its closed position and the other of which is tracked by a roller on the piston of a damper which yieldably opposes the movement of the panel back to its closed position. The configuration of the two cam sections is selected with a view to allow for a reduction of the resistance which the follower offers to opening of the door shortly after the panel leaves its closed position as well as to ensure that the damper can operate independently of the follower and vice versa.

Abstract: A sleeve for assisting a cylindrical door closure for maintaining a door opened. A door closure made of a cylindrical barrel with a rod slidably mounted in the member is known to have a hold open washer for locking the rod relative to the barrel. The locking takes place when the washer is tilted on the rod and the edge around the hole pries on the rod. When the hole in the washer does not perform its locking function, the new sleeve is mounted over the end of the barrel. The sleeve has an end wall which abuts against the end of the barrel and is provided with a central aperture for allowing the sliding of the rod. The end wall is made with a greater thickness around the periphery to increase the angle between the washer and the rod so that the prying effect takes place between the washer and the rod.

Abstract: A link is pivotally connected at one end thereof to one end of a case or main body of a door closer so that the link is turnable between a first position where it is received in the case and a second position where it is put outside the case. A roller is attached to the link, and a cam member is installed within the case. Also installed within the case is an urging spring which causes the cam surface of the cam member to abut against the roller, whereby the link is urged in the direction to be received in the case. The case has no oil enclosed therein. Thus, the construction of the case is simple and inexpensive. When the door is closed, the link is received within the case to improve the external appearance.

Abstract: This invention relates to a device ensuring automatic closure of pivoting doors and for holding them in open position. The device includes a fixed box mounted on the door (or frame) and supporting a pivoting arm subjected to the action of a return element. A fixed slide rail is mounted on the frame and a connecting element is positioned between the pivoting arm and the slide rail. The connection between the pivoting arm and the slide rail is obtained by way of a sliding rod, retractable inside the arm. The rod is adapted to be blocked automatically when it projects from the arm by a determined length corresponding to a given degree of opening of the door.

Abstract: For self-closing a sliding door, e.g. of a showcase, combinations of belts and sprockets, cables and pulleys, rods and springs and the like, which have proved difficult to construct, service and replace are replaced by one or more constant force springs associated with a spring-retention cavity or other spring retainer. This permits the doors to be easily removed for servicing and for improved access to the interior of the showcase. Upon door removal, no self-closing apparatus still links the door to the case. The parts are simple and easy to replace, few moving parts are involved and the system is applicable both for new construction and for retrofitting to existing cases.

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: The device comprises a rotor having a central pin a plurality of concentrically arranged cylinders and a sprocket wheel, adapted for mesh engagement with a rack fixed to the sidewall of a drawer compartment. The device also comprises a stator adapted for being attached to a drawer and rotatably mounted on the pin and having a plurality of concentrically arranged cylinders interposed between those of the rotor. Relative movement of the rotor and the stator is controlled by an arrangement of co-operating grooves, a cam, and a ball, and a high density fluid interposed between the cylinders.

Abstract: A control mechanism for a door of a motor vehicle is suggested that is coupled at a door post on the side of the body so that it can be swung, is actuated via an inside and outside handle and comprises a piston-cylinder unit arranged between the door post and the vehicle door. The unit has a piston provided with passage openings for a pressure medium, the piston interacting with an interior valve that separates two working chamber of the cylinders from one another. The mechanism has an exterior blocking valve controlling the medium flow, this blocking valve being arranged in a control circuit connecting the two working chambers of the cylinder, acting against the flow direction. The blocking valve is controlled by a door handle in such a way that the door can be blocked in at least one intermediate position.

Abstract: A stopper which has a rod projected from the lower end opening in a hollow body to be slidable in upward and downward directions and mounted to be urged by the lifting force of a spring, a pedal attached to the rod, and an actuator formed symmetrically with recesses and rotatably supported to one side of the rod. The body is formed with a guide slot 8 adapted so that the actuator is disposed in a predetermined direction slidably in upward and downward directions therein, a rotary controller for rotating the actuator in a predetermined angle, and a connector for engaging the actuator at a predetermined angle, the rod formed to be able to be axially contracted and elongated and returned. Thus, the stopper can lock and release the lock merely by depressing the pedal, thereby improving the operability and permitting locking in a predetermined stroke.

Abstract: A hydro-magnetic door hold open device. A piston on a piston rod is slideably mounted in a cylinder that is mounted eccentrically inside a housing. The piston rod extends out of the housing and connects to a hingedly mounted door so that opening or closing of the door effects reciprocation of the piston within the cylinder. Both the housing and the cylinder within it are filled with hydraulic fluid. A ball valve positioned forwardly of the piston is confined within a valve chamber that has three seats; the inner cylinder is provided with apertures on the rearward side of the piston and forwardly of the valve chamber so that the ball valve is carried by the fluid into either of two of the seats attendant piston advancement or retraction and maintained in such seat by a pressure differential established in the fluid by the travel of the piston.

Abstract: A hinged driveway gate opened manually or by a vehicle against a closing force is latched in the open position for an adjustable time interval for vehicle passage by the control mechanism having an improved support connection with the gate, an improved latch mechanism, a novel optional power spring, an improved dashpot and a novel protective cover.

Abstract: In an apparatus for closing a fireproof door, a holding device comprises a latch mechanism and a slider. The latch mechanism comprises an actuator member swingably supported in a housing which is provided with a tubular portion wherein a stopper is inserted and downwardly biased by a spring, the biasing force of the spring being adjustable by a screw which is threaded into the tubular portion. The slider is provided with an inclined surface at the front end thereof and a through-hole to receive the stopper therein. The slider is slid into the spacing formed between the actuator member and the housing with upwardly guiding the stopper by the inclined surface of the slider and the slider is locked by the stopper when it falls into the through-hole of the slider. The slider is released from the latch mechanism by swinging the actuator member or upwardly pushing the stopper against the biasing force of the spring.