Abstract:
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 45null to about 100null in relation to a closed position. In a preferred embodiment, the apparatus can automatically lock and/or unlock when the door reaches predetermined positions. The apparatus advantageously can be retrofitted to existing door assemblies.
Abstract:
An elevator door assembly includes a rail and at least one roller that rolls along the rail to move a door between opened and closed positions, for example. A resilient track is provided on the rail that facilitates more efficient roller movement and increases the longevity of the assembly. In one example, the resilient track includes several pieces of flexible material that are snapped in place onto the rail. In another example, the flexible track is supported on the rail using a spray coating technique.
Abstract:
The invention is in a device for monitoring the position of a swinging door that is mounted on a stationary frame, the device essentially comprises a magnet and magnetic proximity sensor which are mounted in coaxially aligned relation on a pair of opposing leafs of a hinge. Means are provided for moving the magnet to and from the sensor to correspondingly vary the gap or spacing between them.
Abstract:
A door seal for use with a bi-parting door in which the door panels of the door have supplementary angled leading edges. One leading edge has a triangular cross-section, while the other has a cross-section similar to a parallelogram. To further the reliability of the door seal, a plurality of magnets with corresponding magnet attracting plates may be attached along the leading edges. Alternatively, both leading edges may have at least one magnet aligned with a magnet on the other edge. With the double magnet configuration, the use of multi-pole magnets is necessary. The magnets also help reduce the bounce between the door panels, which may be closed roughly, and increase the force required to separate the door panels when closed.
Abstract:
A double-hinged device for a console box of an automobile whose lid can be opened or closed from either lateral side without using a lever or a similar tool. Since the device has a simple construction, it can be assembled easily and manufactured at a reduced cost. Two sets of a number of pivotal members 3 are removably arranged along the lateral edges of a console box main body 1 and two sets of the same number of connectors 4 are arranged at respective corresponding positions of a box lid 2 so that the pairs of pivotal members 3 and the connectors 4 can be releasably and mutually engaged to close the box lid by means of magnetic force or ball stoppers as they are placed in contact with each other. The box lid 2 can be opened simply by pulling upward either lateral edge of the box lid 2 as the pivotal members 3 and the connectors 4 arranged along that edge are mutually separated and the box lid 2 can be swung open around the other lateral edge.
Abstract:
A power door operator for transit vehicles utilizing a rodless pneumatic cylinder as a prime mover in opening and closing doors in the sidewall of a transit vehicles. Door movement having a controlled, predetermined door edge force is achieved through mechanical coupling an external piston of the rodless cylinder and vehicle doors through an endless toothed belt. Magnetic coupling between internal and external pistons of the cylinder provide controlled force having a maximum or breakaway value applied to the operated door. A novel reaction lock operated by admission of pressurized air to the cylinder latches or unlatches the operated door in its closed position subsequent or prior to door closing or opening. Control of door motion at the ends of its travel is achieved through the use of a novel differential area internal piston in the pneumatic cylinder. Available internal piston force is modified for predetermined piston positions on approaching either end of the cylinder through the use of a sliding rod contained by the pressure sensitive internal position. Movement of the sliding rod adjust the effective piston area so as to modify available force to controlling door motion.
Abstract:
A magnetic closure bumper assembly is used in conjunction with a movable structure that engages a stationary structure. The magnetic bumper assembly includes a first closure bumper and a second closure bumper. The first closure bumper includes a first bumper casing in which a first magnet is disposed. The first bumper casing has a mounting surface configured for attachment to the movable structure and an engagement surface opposing the mounting surface. The second closure bumper includes a second bumper casing in which a second magnet is disposed. The second bumper casing has a mounting surface configured for attachment to the stationary structure and an engagement surface opposing the mounting surface. Magnetic attraction between the first and second magnets causes the first closure bumper to be attracted to the second closure bumper, thereby urging the engagement surface of the first bumper casing to removably contact the engagement surface of the second bumper casing as the movable structure is moved toward the stationary structure.
Abstract:
The present invention provides a locking device for a waste container that keeps the lid of the container closed when the container is knocked over on its side, as may arise from a sudden jerking or jarring motion, such as by impact with the ground, to prevent spillage of its contents. The locking device allows the lid to open automatically when the waste container is tipped over by a dumping operation. The locking device includes a sliding block slidable between a locked position and an open position, and a pendulum weight detachably attached to a magnet, when detached from the magnet, the pendulum weight blocks the sliding block from sliding to the open position. When attached to the magnet, the pendulum weight allows the sliding block to slide to the open position.
Abstract:
A vehicle door checker integrated with a power drive unit for an automobile door includes a direct current permanent magnet electric motor subject to cogging torque. The electric motor includes a central shaft. The vehicle door checker also includes a cogging torque increase device that is mounted to the central shaft externally of the motor. The cogging torque increase device includes pairs of oppositely magnetized permanent magnets that are mounted coaxially in a stator and rotor respectively about the motor shaft. The stator magnets and the rotor magnets shift into and out of alignment with each other as the shaft is rotated such that the motor is held in multiple discrete stable positions that correspond to check positions of an automobile door.