Braking device
First Claim
Patent Images
1. A braking device for an elevator, comprising:
- a motor capable of generating a counter-electromotive force;
a braking system having a disengaged and an engaged position, wherein the braking system moves to the disengaged position upon being energized and moves to the engaged position upon being de-energized; and
first and second switches having an open state, wherein in the open state, the first and second switches electrically couple the motor to the braking system, enabling the counter-electromotive force of the motor to energize the braking system.
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Abstract
A braking device for an elevator is disclosed. The device may include a motor, a braking system, a first switch, and a second switch. The motor may be capable of generating a counter-electromotive force. The braking system may move to a disengaged position upon being energized and may move to an engaged position upon being de-energized. The first and second switches may have an open state. In the open state, the switches electrically couple the motor to the braking system so that the counter-electromotive force of the motor may energize the braking system.
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Citations
20 Claims
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1. A braking device for an elevator, comprising:
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a motor capable of generating a counter-electromotive force; a braking system having a disengaged and an engaged position, wherein the braking system moves to the disengaged position upon being energized and moves to the engaged position upon being de-energized; and first and second switches having an open state, wherein in the open state, the first and second switches electrically couple the motor to the braking system, enabling the counter-electromotive force of the motor to energize the braking system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An elevator with a braking device, comprising:
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an elevator car; a motor associated with the elevator and capable of generating a counter-electromotive force; a braking system operatively coupled to the motor and having a disengaged and an engaged position, wherein the disengaged position the motor is free to rotate and in the engaged position the motor is prohibited from rotating, the braking system moves to the disengaged position upon being energized and moves to the engaged position upon being de-energized; a tension member operatively coupled to the motor and the elevator car, whereupon rotating the motor moves the elevator car; and an electronic controller, including first and second switches having an open state, wherein in the open state, the first and second switches electrically couple the motor to the braking system, enabling the counter-electromotive force of the motor to energize the braking system. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for controlled stopping an elevator, comprising:
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providing a motor capable of generating a counter-electromotive force; providing a braking system having a disengaged and an engaged position, wherein the braking system moves to the disengaged position upon being energized and moves to the engaged position upon being de-energized; electrically coupling the motor to the braking system; creating a braking torque for the elevator from the counterelectromotive force of the motor; energizing the braking system with the counter-electromotive force of the motor; and releasing the braking system to the engaged position as the counterelectromotive force dissipates into the braking torque for the elevator. - View Dependent Claims (19, 20)
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Specification