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| Number | Title | Issue Date |
| 8056183 | Multiple position ball stud for closure strut A multiple position ball stud assembly for a closure strut supporting a closure pivotally attached adjacent to an opening, and a method of operation, is disclosed. The ball stud assembly may comprise a ball stud and a ball stud actuator. The ball stud may have a soc... | 11/15/2011 |
| 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 |
| 7051403 | Electromechanical swing leaf operator The invention relates to an electromechanical swing leaf operator having a door closer (1) with an eccentrically supported pinion (6) that presents a circular rolling curve and meshes with a toothed rack (5) being disposed at a piston (4)... | 05/30/2006 |
| 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 |
| 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 |
| 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 |
| 6493904 | Door closer A door closer includes casing fixedly fastened to a door frame, a hydraulic cylinder installed in the casing and holding a hydraulic fluid, a coupling block installed in one end of the hydraulic cylinder, the coupling block having a pivot shaft connected ... | 12/17/2002 |
| 6434788 | Door closer The invention describes a door closer with an energy storage that includes a resisting spring (3), with a closer shaft (1) driven by the resisting spring (3) and with an hydraulic fluid damped damping device (12, 13), whereby the energy storage and the da... | 08/20/2002 |
| 6397430 | Adjustable hydraulic backcheck door closer A hydraulic backcheck valve system for controlling an opening cycle of a door closer has a housing with an interior chamber, at least one cylinder, and a piston that can reciprocate between a door closing stroke and a door opening stroke within the cylind... | 06/04/2002 |
| 6317922 | Door closer A door closer includes a cylinder and a piston sliding along the cylinder with a piston rod extending from the cylinder, with the closer mounting at one end to the door and at a second end to the door frame. The door closer has a speed adjustment know ext... | 11/20/2001 |
| 6151753 | Door closer to generate a sudden change in the transmission ratio during the closing phase 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 ... | 11/28/2000 |
| 6112368 | Temperature compensating valve A valve element for operative association with a valve seat in a passage in a body in which the valve element is mounted, in use, the valve element comprising first and second portions connected together by snap-fit means, the first portion being screw-th... | 09/05/2000 |
| 5687451 | Revolving door device 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 s... | 11/18/1997 |
| 5657511 | Piston-tpye door closer with adjustable closing speeds An improved multi-stage door closer for automatically closing a door after the door is opened, is disclosed. It contains a cylinder having three sections each with a different diameter, with the middle section having the largest diameter. A pair of speed ... | 08/19/1997 |
| 5651162 | Hydraulic door control system A hydraulic control system for automatically closing and opening a door is disclosed and has means for providing such opening and closing even if power is lost to the hydraulic control system. Further disclosed is a fluid control device of the hydraulic s... | 07/29/1997 |
| 5586361 | Door stop, in particular for motor vehicle doors A door stop including an hydraulic cylinder connectable to one of a door assembly part, a stop piston longitudinally displaceable in the hydraulic cylinder and connected with another part of the door assembly by a piston rod, and two spring-biased closing... | 12/24/1996 |
| 5410777 | Automatic checking mechanism A check or stop for a moveable member, the check or stop comprising actuated means actuated by the moveable member, or alternatively by seperate actuating means, the actuated means being either fastened with the moveable member or being integral with the ... | 05/02/1995 |
| 5251400 | Control for a door closer having a power-assist opening feature A control for a power-assist feature for an hydraulic closer is driven by structure mounted on the pinion shaft of the closer. It includes a pump-activating arm slidably mounted on the shaft, the end of the arm adapted to cover a pump-on sensor when the d... | 10/12/1993 |
| 5239778 | Modular door control apparatus with quick release connection A quick release door closer including a hydraulic assembly and a spring assembly connected at a quick release connection. The quick release connection includes a retaining element and element housing structured to allow the door closer to be easily mainta... | 08/31/1993 |
| 5206971 | Apparatus and method for increasing the efficiency of a door closer by reducing friction therein A door closer has a fluid conduit connecting the high pressure portion of the cylinder in front of the piston with a cavity between the surfaces of the cylinder wall and the piston. This cavity is located at the intermediate lateral surface of the piston ... | 05/04/1993 |
| 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 |
| 5090089 | Automatic door closing device To simplify the fabrication of the housing of an automatic door closing device with hydraulic damping, it is proposed to configure the housing as a tubular hollow cylinder 106 on which, externally, by means of one or more compactly superimposed covering e... | 02/25/1992 |
| 5064033 | Rotary damper A rotary damper is disclosed having a hollow casing and a power receiving shaft extending exteriorly of the casing. The power receiving shaft turns a movable vane within the casing to pressurize a working fluid. A stationary partition member including a d... | 11/12/1991 |
| 5050268 | Door closer with back checking means An improved door closer is provided which has a back checking arrangement including a loosely held resilient cushion bar which is engaged by a metallic shield abutting sliding cam plates during a final few degrees of opening of a door to provide an increa... | 09/24/1991 |
| 5016317 | Lightly-operating automatic door closer with double cylinders An automatic door closer includes: a casing having a primary and a secondary cylinder juxtapositionally formed in the casing for resiliently holding two pistons in the two cylinders filled with a hydraulic oil and partitioned with a wall formed with a mai... | 05/21/1991 |
| 5012551 | Furniture hinge A furniture hinge has a hinge arm connectible to the body of a piece of furniture and a lever connectible to a closure for the furniture. The closure is movable between a closed position and an open position. A damping device is disposed between the hinge... | 05/07/1991 |
| 4999872 | Door closer A door closer wherein a housing defines a fluid-containing space for a reciprocable damping piston which divides the space into a first and a second compartment. The piston carries a check valve which is closed during movement of the piston in a first dir... | 03/19/1991 |
| 4995194 | Power-assist door closer An hydraulic door closer has a motor/pump component to assist opening the door by supplying oil under pressure to the closer cylinder. The component is activated by a switch sensitive to the turning of the closer pinion shaft as the door is moved out of i... | 02/26/1991 |
| 4991255 | Pneumatic door-closer usable for left-hinged and right-hinged doors A pneumatic door-closer includes a door-closer body pivoted to a generally L-shaped crank unit which is mounted pivotally on a support. The unit includes a long crank arm member and a short crank arm member, and can be adjusted to change the positions of ... | 02/12/1991 |
| 4967444 | Device for damping the closing movement of a dual door spring-loaded or closure and closure control therefor 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... | 11/06/1990 |
| 4937913 | Door closer A door closer wherein a housing defines a fluid-containing space and rotatably supports a shaft which is articulately connected with a pivotable door panel. A piston in the housing divides the space into a chamber and a compartment and has a toothed rack ... | 07/03/1990 |
| 4886149 | Rotary type hydraulic damper A rotary type hydraulic damper for motorcycle suspension application is disclosed in which a shaft and a housing each containing oppositely extending vanes are arranged for relative rotational movement. The vanes cooperate to define alternately spaced exp... | 12/12/1989 |
| 4847946 | Hydraulic door closer 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... | 07/18/1989 |
| 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 |
| 4817238 | Pneumatic door-closer having a closable passage and a regulatable passage A door-closer has an air cylinder in which a piston rod and a piston body are provided to define first and second sealed chambers. The piston body is sleeved movably on the piston rod and has a tapered bore which is communicated with the second chamber. A... | 04/04/1989 |
| 4797971 | Adjusting device for a vehicle door 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 p... | 01/17/1989 |
| 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 |
