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| Number | Title | Issue Date |
| 7774899 | Non-handed door closer cover attachment method 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 therei... | 08/17/2010 |
| 7421761 | Door closer A door closer comprises a spindle journaled in a housing and connected to turn with a door. Upon rotation of the spindle, a cam carried by the spindle effects linear movement of a slide assembly relative to the housing. A piston is connected with the slide assembly.... | 09/09/2008 |
| 7356878 | Door closer A door closer includes an anchor assembly for mounting on a door frame, an actuator assembly for mounting within the thickness of a door which is hinged for movement between open and closed positions, an operating member coupled by a linkage to the anchor assembly a... | 04/15/2008 |
| 7353923 | Damper device A damper device includes a housing; a viscous fluid filled inside the housing; a rotor rotatably disposed inside the housing; and a sealing member for preventing the viscous fluid from leaking through the rotor and the housing. A rotational wing with a viscous-fluid... | 04/08/2008 |
| 7240603 | Valve A piston assembly for a door closer includes a piston formed with a mounting hole and a door closer valve installed with clearance in the mounting hole. The door closer valve has a body part with first and second formations at opposite respective ends of the body pa... | 07/10/2007 |
| 7219391 | Door assembly with concealed door closer A door assembly and a door closer arranged and constructed so as to be wholly concealed within the associated door, yet is rendered readily accessible to effect the adjustment thereof to regulate or control the closing speed of the associated door. The door closer i... | 05/22/2007 |
| 7216400 | Door hold and release mechanism A door hold and release mechanism is provided including a housing mounted onto the pneumatic cylinder of a door check or closer having a piston rod extending from one end of the cylinder. The piston rod passes through an oversized hole in a drop stop which restricts... | 05/15/2007 |
| 7197790 | Hinge including a gas strut A hinge which includes a gas strut. The hinge in one embodiment further includes a first control arm and a second control arm which is coupled to the first control arm. The gas strut in this one embodiment is coupled to both first and second control arms. ... | 04/03/2007 |
| 7111359 | Rod gripper A bar or rod gripper for arresting the linear axial movement of a rod, e.g. the piston rod of a door closure between a door open or closed position, that includes a compressible bushing slidably disposed about the rod or bar, and a canter washer disposed about the c... | 09/26/2006 |
| 7076834 | Cabinet door buffer bar A cabinet door buffer bar includes a hollow tube, a shaft, an elastic element and a sliding member. The sliding member and the inner wall of the hollow tube form different intervals there between so that a resilient member mounted thereon receives varying constraint... | 07/18/2006 |
| 7024725 | Overhead door closer with slide arm assembly This invention relates to an overhead door closer with slide arm assembly having a toothed pinion that is eccentrically supported and presents a circular rolling curve, which pinion meshes with a toothed rack arranged at a piston. The invention concentrates on a par... | 04/11/2006 |
| 7007342 | Door closer The present invention relates to a door closer, in a housing of which is received a sliding cylinder, the sliding cylinder is provided with teeth on an outer periphery thereof for meshing with a gear wheel of a door shaft, a sliding cylinder interiorly formed with i... | 03/07/2006 |
| 7003847 | Door closer A door closer comprising a housing, a member for driving engagement with a door, the member being rotatable relative to the housing in a door opening direction and in a door closing direction, a spring apparatus within the housing providing a resilient bias, the res... | 02/28/2006 |
| 6976288 | Rod gripper A bar or rod gripper for arresting the linear axial movement of a rod, e.g. the piston rod of a door closure between a door open or closed position, that includes a compressible bushing slidably disposed about the rod or bar, and a canter washer disposed about the c... | 12/20/2005 |
| 6976289 | Door closer with door arresting mechanism 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... | 12/20/2005 |
| 6968930 | Damper A damper includes a cylinder, and a piston rod inserted into the cylinder through an opening portion of the cylinder. The piston rod includes front and base ends, and a frictional engaging member provided on an outer surface along a longitudinal direction thereof ex... | 11/29/2005 |
| 6942204 | Extension spring strut An extension spring strut comprises a pre-loaded extension spring with a damper disposed therein. An operating element is disposed inside the extension spring, having an actuating tappet that is joined to an end of the extension spring. The actuating tappet is displ... | 09/13/2005 |
| 6931693 | Damper mechanism A damper mechanism installed on an opening and closing device that has an arcuate plunger with the same radius of curvature of the cylinder it slidably mates with. A torsion coil spring causes the sliding action of the plunger into the cylinder in one direction.... | 08/23/2005 |
| 6904643 | Door closer hold-open apparatus The present invention relates to a hold-open apparatus for controlling the position of a door, preferably a screen door or storm door. The apparatus is used in conjunction with a piston assembly and can maintain a door in a predetermined open position, such as about... | 06/14/2005 |
| 6871381 | Door closure with adjusting mechanism for controlling door closing speed A readily adjustable door closure for varying the rate of speed at which an associated door may close which is effected by rotating the piston rod relative to the piston and associated cylinder assembly so as to vary the rate of flow of an actuating fluid flowing fr... | 03/29/2005 |
| 6442795 | Damper for a pivot door A damper for a pivot door has a piston movably received inside the damper and having a first channel and a second channel respectively and selectively communicating with a space full of hydraulic oil, such that the movement of the piston is able to be slo... | 09/03/2002 |
| 5709009 | Door closer for the non-fire side of a fire-door safety installation 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 fa... | 01/20/1998 |
| 5502874 | Speed regulating valve for fluid filled door closers A valve for regulating speed of operation of a door closer, includes an elongated hollow tubular body having a closed first end with driving provisions thereon, an open second end, and an orifice in its sidewall adjacent its closed first end; an endplug f... | 04/02/1996 |
| 5487206 | Door control device A door closing device comprises a piston (12) having at one end a seal (21) which seals the interface between the piston and a housing (10). The seal (21) also acts as a one-way valve and carries a pressure relief valve (37).... | 01/30/1996 |
| 5432977 | Door Closers The door closer is of the kind which acts, for example between a door hinge stile and a hinge jamb and has a body for mounting usually in the stile, from which body a spring-biased tension member extends correspondingly for anchoring to an anchoring point... | 07/18/1995 |
| 5414894 | Door closer A door closer (20) is attachable to a door (24) and is formed with a chamber (44) in which a piston element (50) is movable to move fluid from the chamber to a reservoir (82) upon opening of the door. After the door (24) has been opened to a position, for... | 05/16/1995 |
| 5343593 | Door closer A door closer having a housing defining a fluid containing chamber and a fluid reservoir and including a piston supported in the chamber for movement in one and an opposite direction in response to respective opening and closing movements of a door. A fir... | 09/06/1994 |
| 5274880 | Door closer A door closer having a return spring for accumulating a recovering force in a door closing direction at the time of opening a door for performing a braking force by a damper at the time of closing the door which comprises a closer body internally containi... | 01/04/1994 |
| 5259090 | Fluid door closer with means to permit entrapped gases to move A door closer (20) is attachable to a door (24) and is formed with a chamber (44) in which a piston element (50) is movable to move fluid from the chamber to a reservoir (82) upon opening of the door. After the door (24) has been opened to a position, for... | 11/09/1993 |
| 5222277 | Intermittently and reversibly operable hot wax energized hinge A powered hinge powered by a hot wax linear actuator, which can provide for bi-directional rotation of the hinge as the consequence of sequential and intermittent energizing and deenergizing sequence of the actuator.... | 06/29/1993 |
| 5211269 | Damper for a flapdoor using viscous fluid A damper for a flapdoor that does not show any damping effect when its movable shaft of the damper is rotated with the door in one sense whereas it effectively damps the rotary movement of the flapdoor when the movable shaft is rotated with the door in th... | 05/18/1993 |
| 5187835 | Door closer with rack and pinion, spring, and spring mounting plate A door closer includes a body having a closed, fluid-filled cylinder. A piston is slidably mounted in the cylinder and has an actuating rod with rack gearing. A pinion is rotatably mounted on the body for meshing with the rack gearing of the actuating rod... | 02/23/1993 |
| 5170530 | Door closer A door closer of the kind which acts between a door hinge stile and a hinge jamb has a body for mounting usually in the stile, and from the body a spring-biased tension member extends for anchoring to the jamb. A hydraulic cylinder piston damper is interp... | 12/15/1992 |
| 5165507 | Damper for a flapdoor using viscous fluid According to the invention, there is provided a damper for a flapdoor that does not show any damping effect when its movable shaft of the damper is rotated with the door in one sense whereas it effectively damps the rotary movement of the flapdoor when th... | 11/24/1992 |
| 5111548 | Liquid check and closer A door closer which comprises a damper having a body case including an arm fixed to a door, a rotational shaft formed in the body case, a pair of chambers filled with high viscous liquids, a pair of rotary blades respectively having passages with check va... | 05/12/1992 |
| 4844567 | Vending machine with controlled return access door The prevent invention is directed to improvements in vending machines of the type having an access door which is opened by a purchaser for removing a purchased article from within the machine. A two-stage hydraulic door closer is provided with a spring to retu... | 07/04/1989 |
| 4835905 | Door position indicator for a door closer A door position indicator for a door closer which senses the position of a door closer piston as a means of sensing door position. The door closer and hence the door position indicator may be recessed in the door jamb over the top edge of the door thereby... | 06/06/1989 |
| 4825503 | Braking apparatus for door closer An improved door closer which prevents overly rapid closing due to an external force, such as wind pressure, being exerted on the door. A pair of oil holes are formed communicating with a first pressure chamber and a non-pressure chamber formed in the mai... | 05/02/1989 |
| 4793023 | Door closer and holder A door closer and holder comprises a cylinder shell having a piston sealingly reciprocable therein. A spring biases the piston toward one end of the shell, and the piston is connected through the ususal apparatus to the door. At the one end the operating ... | 12/27/1988 |
| 4723777 | Basketball goal and backboard unit A basketball goal for mounting on a backboard for providing absorption and dissipation of the energy occuring during a dunk shot or the like. The rim of the goal is pivotally mounted to the backboard and held in place by means of a spring and fluid filled... | 02/09/1988 |
