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| Number | Title | Issue Date |
| 7364023 | Device for slowing the movement of a drawer or similar movable member, having releasable locking means A device (15) for slowing the movement of a drawer (2) urged by unidirectional thrust means (4), including a casing (17) fixable to a structure (S) and defining a chamber (18) filled with a viscous fluid, and a rotor (31). T... | 04/29/2008 |
| 7063225 | Opening-closing mechanism and opening-closing device using same In an opening-closing mechanism of a door member for shifting the door member from a closed position for closing an opening portion of a base member to an open position and vice versa, the door member includes a pair of arm portions. Each arm portion includes a circ... | 06/20/2006 |
| 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 |
| 7016492 | Magnetic hinge apparatus An apparatus for controlling a lifting cover open automatically, is applied in an electric product with a lifting cover. The apparatus includes a first magnetic device disposed on the main body of the electric product, a second magnetic device disposed on the liftin... | 03/21/2006 |
| 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 |
| 6681525 | Handicapped train-station gate A handicapped-entrance gate for retrofitting a train-station comprises a door panel that forces itself normally closed, but can be pushed open from either side. A closing mechanism is fully contained within a cap rail along to top edge of the door and ope... | 01/27/2004 |
| 6618899 | Door closer and method of producing a door closer A door closer assembly and method of making the assembly, in which the closing force is exerted by at least one closing spring. The door closer assembly comprises a housing, a rotor journalled in said housing to deliver torque, and at least one piston app... | 09/16/2003 |
| 6510586 | Door closer Door closer with a spring system that must be stretched when the door is open and supplies the closing moment necessary to close the door. There is provided a gear train between the spring system and the door to influence the force curve which varies over... | 01/28/2003 |
| 6266847 | Door operator and process for operation of a door operator A door closer assembly and a method for operating a door closer assembly. The door closer assembly includes a housing and a door piston guided in the housing. The door piston is operably connected to move a door. A spring piston is guided in the housing a... | 07/31/2001 |
| 6262548 | Door drive for a pivot-hung door This invention relates to a pivot-hung door drive system with an electro-mechanical device that supplies the closing moment required for the opening and closing of the door, comprising a transmission which varies its translation ratio over the angle of ro... | 07/17/2001 |
| 6154924 | Door closer unit 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... | 12/05/2000 |
| 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 |
| 6047440 | Non-rotating pinion cap A non-rotatable pinion cap for use on a non-handed door closer where both ends of the drive pinion extend beyond the cylinder body. The pinion cap has one exposed edge for engaging the door or door frame surface and includes a christmas tree plug for atta... | 04/11/2000 |
| 5943736 | Door closer A door closer includes a casing-like body enclosing a piston member, which is movable back and forth according to the movements of a door and is in cooperation with at least one closer spring, and a closer shaft and a pinion member connected thereto for t... | 08/31/1999 |
| 5802670 | Door closer A door closer with an adjustable springiness has an adjusting screw located inside the pressure chamber and at the same time inside the pressure spring.... | 09/08/1998 |
| 5553353 | Door damping system A door damping system includes a base fixed to a wall, a fixing element fixed to the door and a rod connected between the base and the fixing element, the base having a pinion rotatably disposed in the base and the pinion coupled to the rod and a coil spr... | 09/10/1996 |
| 5535514 | Method for making a hydraulic door closer having a one-piece molded housing body A method for making a hydraulic door closer includes the steps of molding material to form an elongated single-piece housing having a longitudinal cylindrical bore extending from a first open end thereof to a closed second end, a transverse intersecting b... | 07/16/1996 |
| 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 |
| 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 |
| 5272787 | Overhead concealed door closer, mechanically, hydraulically operated An overhead concealed door closer, hydraulicly operated, within a narrow housing case which fits within a header. The housing case has a step radius design along one side and the aperture for the pinion is off-center toward the step radius design side. Hy... | 12/28/1993 |
| 5265306 | Automatic door closing device An automatic door closing device comprises a base and an oil guiding loop. The base is provided in the direction of a longitudinal axis thereof with a canal and is further provided in the direction of a short axis thereof with a through hole. A sliding bl... | 11/30/1993 |
| 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 |
| 5219372 | Door accessory with a hydraulic retarding device A door accessory, such as a door hinge or a door check, includes a hydraulic retarding device for cushioning the closing action of a door. The hydraulic retarding device has a cylinder body which confines a fluid receiving space to receive hydraulic fluid... | 06/15/1993 |
| 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 |
| 5001809 | Door apparatus with damper switch A door apparatus with damper switch formed by a control function which supplies a soft operation of a door with combination of a spring tension and a friction of viscous oil in a damper switch, a guide function which supplies a rotation route from the operatio... | 03/26/1991 |
| 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 |
| 4979261 | Variable position door closer 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. ... | 12/25/1990 |
| 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 |
| 4937914 | Door control device The piston of a door control device is assembled from a channel and cups welded on to opposite ends of the channel. A valve assembly is mounted in one of the cups. Rollers extend between opposite sides of the channel and co-operate with teeth on a rotatab... | 07/03/1990 |
| 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 |
| 4763385 | Door closure transmission utilizing an eccentric pinion A door closer is described in which transmission ratios which change in dependence on the closing angle can be realized by eccentric toothed elements. The toothed elements can have different profile offsets, moduli and flank angles along their respective ... | 08/16/1988 |
| 4744125 | Door closer transmission including an eccentric pinion A door closer is described in which transmission characteristics which change in dependence on the closing angle can be realized either by two pistons disposed coaxially within one another and displaceable relative to one another, or by eccentric toothed ... | 05/17/1988 |
| 4686739 | Door closer A door closer the closing force of which can be adjusted is provided with a device for indicating the selected closing force. The device used to indicate the prevailing closing force is actuated in dependence on the adjustment of the spring which determin... | 08/18/1987 |
| 4665583 | Door closer piston assembly having separate head portions A hydraulic door closer has a housing including a bore and a piston supported for reciprocal sliding movement within the bore in door opening and closing directions corresponding, respectively, to opening and closing movements of an associated door. The p... | 05/19/1987 |
| 4653229 | Holding installation for double doors A holding installation with an integrated closing sequence regulation is described for double doors comprising a leading door which is the first to close and a trailing door which then closes. The hydraulic door closer associated with the trailing door is... | 03/31/1987 |
| 4502180 | Door control device having piston assembly with separately formed rack The piston assembly of a hydraulically controlled door closer has a tubular wall, plugs secured in end portions of the wall and a separate rack secured inside the tubular wall between the plugs by formations on the plugs.... | 03/05/1985 |
| 4455708 | Door closer having a braking mechanism comprising an elastomeric bag A door closer comprising at the end of one of two pivotally interconnected arms a closing device whose housing encloses a cylindrical piston driven by the arm through a rack-and-pinion system. On each side of this piston a return spring and a bag, filled ... | 06/26/1984 |
| 4419786 | Door closer assembly A door closer assembly for controlling the operation of a door relative to a door frame includes a door closer mounted on the door and an articulated arm assembly which has one end attached to the door closer and the other end pivotally secured to a slide... | 12/13/1983 |
