Abstract:
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), whereby a particular execution of the rolling curve and of the teeth (9) of the toothed rack (5) in adaptation to a toothing of the pinion (6) is achieved. With the intention to realize an optimized moving course of the piston (4) in the housing (2) of the door closer (1) an improved execution of the delayed closing operation is provided.
Abstract:
A power slide device includes a first cable connected to a wire drum and moving in a first direction when wound up by the wire drum, a second cable connected to the wire drum and moving in a second direction when wound up by the wire drum, a first tension roller having a first abutting surface abutting against the first cable, and a second tension roller having a second abutting surface abutting against the second cable. The first abutting surface is taken as an inclined surface becoming gradually shorter in diameter toward the first direction, and the second abutting surface is taken as an inclined surface becoming gradually shorter in diameter toward the second direction.
Abstract:
A power-operated system for actuating the liftgates of motor vehicles is disclosed. The system includes a controllable strut with internal locking structure that includes a driver and a valve assembly. The controllable strut is typically mounted on one side of the liftgate between the liftgate and the vehicle's frame. Conventional strut may be mounted on the other side of the liftgate. One end of each strut is connected to a powered articulating arm. To move the liftgate between open and closed positions, the articulating arms move the controllable strut and the other strut between positions of greater and lesser mechanical advantage. During the movements, the locking structure in the controllable strut may be activated and deactivated either cyclically or continuously to momentarily to retain the controllable strut as particular lengths.
Abstract:
A device for urging a door into a first position includes a spring apparatus (16) including a winding drum (22) having a conical outer peripheral surface (27) and a torsional spring (24) for imparting a relatively constant urging force to a cable 23 secured to the door in the direction of the first position.
Abstract:
A mechanism and method for operating a track-mounted door is disclosed. The mechanism includes a pair of side drums that are connected by first cables to the bottom of the door. The side drums are coaxially mounted on a shaft for simultaneous rotation with a pair of cable drums. The cable drums are connected to high pressure gas struts by second cables. Each second cable is carried around a shiv wheel that slides along a guide track as the second cable moves. Each shiv wheel is operatively connected to one of the gas struts. As the shiv wheel moves along the guide track toward the cable drum, the gas strut is charged. As the shiv wheel moves away from the cable drum, the gas strut is discharged. A standard electric motor and screw driven lift-arm is used to initiate the opening and closing of the door. The charged gas strut stores sufficient energy to overcome friction and gravity to assist the electric motor and lift-arm to open the door.
Abstract:
A method and system for controlling the descent of a moveable element pivotally attached to a rigid structure is described herein. The moveable element is directly attached to the rigid structure, and is then connected to a compressible strut, which is attached to a linkage connected to the rigid structure. The descent of the moveable element is controlled using a microcontroller and a motor attached to the linkage, and the control path for the linkage is selected based on a comparison of the angle between the linkage and rigid structure and the angle between the moveable element and the rigid structure.
Abstract:
Constant balance of a varying load, particularly a window shade or blind, is maintained by providing a lifting force, preferably from a spring, through a mediating mechanism including a variable pitch screw arrangement, such that the mechanical advantage of the mediating mechanism changes to allow the continuously decreasing spring force to apply an appropriate lifting force at all times. The variable pitch screw preferably takes the form of a twisted bar.
Abstract:
An operator for controlling pivoting of a window sash relative to a window frame including dual arms which pivot relative to one another to move the window sash. A drive input pivotally drives a drive member which is eccentric about its pivot axis, where the drive input includes recesses spaced from the input pivot axis and engageable by a user's fingers to manual pivot the drive input. A drive ring gear is pivotable relative to the drive member and includes two axially spaced sets of gear teeth. The dual arms are secured to separate ring gears which are respectively associated with the two gear teeth sets. The drive ring gear is moved eccentrically relative to the pivot axis by the eccentric drive member whereby at least some of the teeth of the first set of drive ring gear teeth are disengaged from the teeth of its associated arm ring gear and at least some of the teeth of the second set of drive ring gear teeth are disengaged from the teeth of its associated arm ring gear. At least one of the first and second arm ring gears or the first and second sets of drive ring gear teeth have different numbers of teeth.
Abstract:
A van door slidable in tracks (16, 18 and 20). An operating module is mounted inside the van adjacent center track 18. A front cable attached to drive pulley (144) extends through guide assembly (54) to hinge and roller assemble (26). A rear cable attached to drive pulley (136) extends through guide assembly (56) to hinge and roller assembly (26). The drive pulleys (136 and 144) each have a large diameter spiral cable groove (164), a small diameter cable groove (208) and a transition cable groove (210). A motor rotates the drive pulleys. The small diameter cable grooves drive the door when the door is in the forward portion of the tracks. The large diameter spiral cable grooves drive the door when the door is in the center and rear portions of the track. Fixed idler rollers (226 and 254) are positioned relative to the cable drive pulleys to insure that the total cable in the continuous cable loop is substantially the same when the cable is driven by the small diameter cable grooves as when the cable is driven by the large diameter spiral cable grooves. A cable tension system (220) maintains cable tension. A slack cable take-up pulley (174) on the drive pulley (136) is locked in position by teeth (194) thereon and arcuate tooth rack (172) which move into engagement by rotation of the drive pulley (144) relative to drive pulley (136).
Abstract:
A multiple spring counterbalance includes a torsion spring and a tension spring for exerting a combined lifting force on a window sash. A spiral rod is threadably engaged with a follower nut for converting a torque applied by the torsion spring into a lifting force on the window sash. The spiral rod has a pitch that is varied along one part of its length to produce a substantially constant combined lifting force throughout most of a range of sash travel between a lowered position and an intermediate position. However, the pitch is further varied along another part of the length of the spiral member to produce a larger combined lifting force within a remaining portion of the range of sash travel from the intermediate position to the raised position.