Abstract:
When a drive shaft is in a non-drive state, a second drive rotor is in a non-engaged state with a driven rotor with respect to its own rotating direction. When the drive shaft is in a drive state, a rotating force of a first drive rotor is transmitted to the second drive rotor through an urging member. As a result, a power transmitting member revolves, and a centrifugal force arranges the power transmitting member at a second clamping position. The second drive rotor receives a reaction force from a driven rotor via the power transmitting member. As a result, the second drive rotor is relatively rotated in an opposite direction to a rotating direction of the first drive rotor with respect to the first drive rotor, against an urging force of the urging member. As a result, the first drive rotor is engaged with the driven rotor with respect to its own rotating direction. Accordingly, the clutch is stably operated.
Abstract:
An overhead door control system includes an input shaft drivably connected to an overhead door axle and a load brake shaft drivably connected to the input shaft. The control system includes a load brake which releases the load brake shaft in response to rotation of the input shaft. The load brake engages the load brake shaft in response to the rotation of the input shaft being driven to zero.
Abstract:
A closure mechanism C comprising a elongated push/pull member 1, a base part 2, a resilient element 4, such as a coil spring, a motion converting means 6, such as a rack-and-pinion gearing, comprising a rotary output element 6o and a rotary braking device 7, such as a centrifugal brake, comprising a rotary input element 7i directly or indirectly coupled to said rotary output element 6o at least during movement of the elongated push/pull member 1 towards said first position, so as to be rotated thereby. The elongated push/pull member 1 and the base part 2 are assembled to each other so that said elongated push/pull member 1 is guided in a translational motion relative to the base part 2 between a first and a second position. The resilient element 4 is placed between said first and base parts 1, 2 so as to urge the elongated push/pull member 1 towards said first position. The motion converting means 6 converts the translational motion of said elongated push/pull member 1 relative to said base part 2 into a rotational motion of said rotary output element 6o, which is transmitted to the rotary input element 7i, and the rotary braking device 7 brakes its rotary input element 7i with a variable braking torque which increases and decreases with the rotational speed of said rotary input element 7i.
Abstract:
An automatic closing device for returning a sliding section of a sliding door assembly to a closed position without application of an external force. The automatic closing device has a controlled return mechanism that has an adjustable mass assembly and a spring. The controlled return mechanism generates a force that returns the sliding section to its closed position after the sliding section is opened. The controlled return mechanism has a connector having a first end and a second end. The first end of the connector is attached to a fixed position on the sliding door assembly and the second end of the connector is attached to a top end of the controlled return mechanism. The controlled return mechanism has a pulley assembly having a plurality of pulleys that guides the connector from the top end of the controlled return mechanism to the fixed position on the sliding door assembly.
Abstract:
When a drive shaft is in a non-drive state, a second drive rotor is in a non-engaged state with a driven rotor with respect to its own rotating direction. When the drive shaft is in a drive state, a rotating force of a first drive rotor is transmitted to the second drive rotor through an urging member. As a result, a power transmitting member revolves, and a centrifugal force arranges the power transmitting member at a second clamping position. The second drive rotor receives a reaction force from a driven rotor via the power transmitting member. As a result, the second drive rotor is relatively rotated in an opposite direction to a rotating direction of the first drive rotor with respect to the first drive rotor, against an urging force of the urging member. As a result, the first drive rotor is engaged with the driven rotor with respect to its own rotating direction. Accordingly, the clutch is stably operated.
Abstract:
To provide a rotary damper having a compact shape with a short axial length and capable of absorbing an extremely high torque acting temporarily in the case of a door abruptly closing. In a rotary damper (1) in which a rotary member (5) includes: a basement portion (6) axially supported by a drive shaft (4); a torque adjustor (7) capable of relatively moving on the drive shaft (4); a slide member (8) positioned through and facing the torque adjustor (7); and a spring (9) for energizing the slide member (8) to a cam, the slide member (8) is moved in the radial direction by relatively moving the torque adjustor (7) to a position having a predetermined angle against the drive shaft (4), and a predetermined radial clearance is formed between an outer surface (8b) of the slide member (8) and an inner peripheral surface (3a) of a chamber, thereby changing the clearance to change a torque generated by the rotation of the rotational member (5).
Abstract:
The invention is an uncomplicated mechanism for preventing injury to a person's (especially a child's) hand when a fast-closing door slams against a door frame or jamb. The mechanism comprises a casing which is positioned within a hollowed out portion of the door. The casing is constructed with an opening disposed along the edge of the door panel. A metallic pendulum is housed and suspended within the casing such that the action of centrifugal force imparted by a fast-closing door will cause the pendulum to swing outwardly through the opening. A raised metal body is attached to the side molding of the door jamb and functions to engage the outwardly swung pendulum to prevent the door from completely closing.
Abstract:
A time delay release mechanism has a brake actuator including an actuation member movable between engaged and released positions. The actuation member, when in the engaged position, operatively engages a fire barrier for preventing closure thereof. The actuation member, when in the released position, is operatively disengaged from the fire barrier such that the release mechanism does not prevent closure thereof. A timer includes a magnet which is powered by voltage applied to a capacitor. The magnet is, in turn, connected to the actuator member. When power is interrupted, the capacitor disengages for a predetermined time period. At the conclusion of the time period the magnet releases the actuator which, in turn, releases the brake and causes the fire barrier to close.
Abstract:
A manually assistable electric driving device for a lid of an automobile luggage compartment has a clutch mechanism disposed between an electric motor and an output member drivingly connected to the lid. The clutch mechanism is so constructed that, when the lid is being driven by the motor in either direction, the lid can be manually moved in the same direction and at a speed higher than the speed caused by the motor drive.
Abstract:
A retraction device for automatically closing a panel, such as a door or window, after the panel has been opened. The retraction device includes a drum, a coiled spring power assembly for driving the drum, a centrifugal brake for controlling the power assembly and the drum to eliminate slamming of the panel during closing, and a gear train transmission assembly to connect the power assembly and the centrifugal brake. In one embodiment, the drum is a spool which carries a cable to connect the panel to the retraction device. In another embodiment, the drum has a rim which frictionally engages a frame supporting the panel. The centrifugal brake is adjustable to take into account a wide range of panel sizes and frictional conditions. This adjustment can be made through an aperture in the device's housing for quick and easy on-site installation. A one-way clutch mechanism is coupled between the power assembly and the brake to actuate the brake only when the panel is being retracted. This clutch mechanism is formed by two members, each of which is integrally molded of plastic.