Abstract:
An automatic door operator for swing doors which uses a worm gear transmission to connect the motor to a belt and pulley which in turn is connected to a spur gear and drive gear. The door arm of the swing door is connected to a double-ended shaft which is part of the drive gear. A rack and pinion gear and spring are used to provide the closing force to the door arm. The motor is mounted over the spring and the belt and pulleys are located alongside the motor which results in a compact non-handed design.
Abstract:
An operating system for controllably moving in upward and downward directions a sectional door (D) in relation to a door frame (12) having a pair of jambs (13, 14) and an interconnecting header (15), including a counterbalancing system (30) having a drive tube (31) interconnected with the sectional door proximate the ends thereof, a motorized operator (10) mounted adjacent to the drive tube and between the ends of the sectional door, and a drive train (70) interconnecting the drive tube and the motorized operator for selectively driving the sectional door in upward and downward directions. The operator includes a motor (40) for selectively rotating a drive shaft (60) in two directions, a drive wheel (80) on the drive shaft for rotating the drive train in one direction when the motor rotates the drive shaft in one direction, and a coupler on the drive shaft rotating the drive wheel when located in a first position and directly engaging and rotating the drive gear in the other direction when located in a second position.
Abstract:
An over-the-top type cabinet door prop unit is characterized in that it comprises a fitting case to be rigidly fitted to the inner surface of one of the lateral walls of the cabinet, a movable spring holder vertically movable relative to the fitting case containing it and urged downward by compression springs, a link arm pivotably linked at the upper end to the movable spring holder by a pivot pin and a swing arm swingable around an arm spindle located in a lower portion of the fitting case and having a base section arranged around the arm spindle and linked to the lower end of said link arm by a link pin and an arm section extending from the base section and pivotably linked at the distal end thereof by an anchor pin to an anchor pin bearing secured to the over-the-top type cabinet door and that the pivot where the link arm and the base section of the swing arm is linked by the link pin is located closer to the cabinet door relative to the vertical axial line connecting the pivot pin and the arm spindle when the over-the-top type cabinet door is closed and moved onto the vertical axial line in the initial stages of the opening motion of the cabinet door and then further away from the cabinet door relative to the vertical axial line in the subsequent stages of the opening motion of the cabinet door until the cabinet door is placed on the top wall of the cabinet.
Abstract:
A device for dampening the movement of a pivotally supported structural part, for example, a flap or closure within an automobile, comprises a pivot arm attached to the structural part, and a rack operatively connected to the pivot arm. A housing is rotatably supported upon a support surface or member, and a rotor is rotatably disposed within the housing along with a viscous fluid which tends to dampen rotary motion of the rotor. The rotor also comprises a pinion which is enmeshed with the rack, and the housing comprises a pair of guides for confining movement of the rack in a translational or rectilinear mode while maintaining the rack enmeshed with the rotor pinion. Consequently, when the flap or closure is either opened or closed, the flap or closure is moved in a dampened mode due to the movement of the pivot arm and the rack relative to the dampened rotor pinion. As a result of the rotary mounting of the housing, and the provision of the rack guides, the rack undergoes both rotary and translational movements while being maintained enmeshed with the rotor pinion.
Abstract:
A mechanism for the powered opening and closing of household panels such as windows and doors comprises a worm drive screw, small enough to be mounted within and along the upper track of a sliding panel. A nut threaded on the drive screw moves axially along the screw when the screw is rotated. Motion of the nut is transmitted to the panel by means of a coupling bolt, slidingly mounted within a cavity in the top of the panel. The bolt slides up to engage the nut for powered operation, and slides down to disengage from the nut during manual operation. The position of the bolt can be secured through locking means. A resilient, dielectric transmission accouplement between the drive screw and the motor provides electrical and vibrational isolation, and scalability. A second extendible bolt mounted on an opposite end of the frame hinders pitch deflection of the panel during powered operation. Worm gearing and a solenoid based brake locks the motor and the position of the nut when no power is applied.
Abstract:
A pivoting gear damper for use with a rotary damper includes a toothed gear rack movable between a first position and a second position corresponding to movements in first and second directions. A pivotal bracket is provided for rotation between first and second positions corresponding to movements of the gear rack in the first and second directions. The rotary damper has a toothed driven gear disposed on the pivotal bracket. One-way dampening means is disposed on the pivotal bracket for causing the toothed gear rack to be in meshed engagement with the toothed driven gear to produce a dampening force when the gear rack is moved in the first direction and for causing the toothed gear rack to be disengaged from the toothed driven gear to allow unrestricted motion when the gear rack is moved in the second direction. The one-way dampening means is comprised of a guide pin and a cam member.
Abstract:
A brake mechanism for slowing elevator car doors in an elevator system during an emergency power outage or electrical control malfunction includes a brake shoe activated by a solenoid. During normal operation of the elevator car doors, the solenoid is in activated mode and maintains the brake shoe spaced away from the door pulley. During a power outage or electrical controls malfunction, the solenoid is deactivated and, in cooperation with a compression spring, forces the shoe brake to engage the door pulley to slow down the movement of elevator car doors.
Abstract:
A gear damper includes anti-ratcheting means for preventing disengagement between a gear of the damper and a mating gear rack when a sliding or rotating tray is moved or rotated in and out of a stationary housing. The gear damper further includes mounting means so as to permit the gear damper to move floatingly in a direction perpendicular to the gear rack as a toothed wheel gear follows the gear rack. As a result, the distance between the toothed gear of the damper and the gear rack is held substantially constant so as to eliminate ratcheting and gear skipping.
Abstract:
There is provided an overhead door that is placed on the roof board of a cabinet or the like to which it is fitted when it is opened so that the space available within the cabinet may be maximized. The overhead door 8 is swingably secured to the inner lateral wall surfaces 4, 4 of the cabinet 1 by means of a pair of support arms 14, 14 such that the distal end of each of the support arms is rotatably secured to a rotary shafts 15 on the corresponding lateral wall of the cabinet and the proximal end is pivotably fitted to the inner surface of teh door at a position close to the lower edge thereof by way of a bracket 16. The door 8 is provided on the inner surface thereof with a pair of longitudinally arranged slide rail assemblies 9, 9, each comprising a relatively long outer rail 9c and a relatively short inner rail 9d arranged vis-a-vis the outer rail and pivotably secured at the upper end to the front edge of the roof wall 2 of the cabinet 1 by means of a hinge 14 comprising hinge bodies 10a, 10b and an axis 10c. Thus, the door 8 can be swung closed as a combined effect of slewing and sliding motions when it is pulled forward and downward from its fully open position located on the roof board 2.
Abstract:
A garage door operator is disclosed to have a front coupling for a threaded screw of the operator and the rotor of the motor. The coupling includes a first coupling device that is a unitary coupling member with opposing recesses for receiving each of the rotor shaft and an end portion of the screw. The unitary coupling member thereby connects the screw to the motor for torque transmission from the motor. The second coupling device includes a thrust containment device that is supported on the screw, and an intermediate assembly disposed between the thrust containment device and an end portion of the guide rail of the door operator. A retainer component of the intermediate assembly restricts expansion of the thrust containment device.