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US 9,776,832 B2Granted
Self-propelled cargo lift for elevator systems
AssigneeOtis Elevator Company
InventorsTadeusz Pawel Witczak, Richard N. Fargo, Martin J. Hardesty
Life of this patent
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Abstract
An elevator system includes a car, configured to travel through a hoistway; a first stationary drive unit, configured to be mounted in a hoistway, a first movable drive unit, configured to be functionally coupled to the car and to the first stationary drive unit, and a second movable drive unit, configured to be functionally coupled to the car and to the first stationary drive unit.
Claims8
An elevator system comprising:
- a car, configured to travel through a hoistway;
- a first stationary drive unit, configured to be mounted in the hoistway,
- a first movable drive unit mounted to the car and driven by the first stationary drive unit,
- a second car, configured to travel through the hoistway, a second movable drive unit mounted to the second car;
- wherein the second car is physically connected to the car.
2 more elements
A method for providing a cargo lift in an elevator system, the method comprising:
- configuring a car and a second car for cargo lift, the configuring including:
- obtaining a first propulsion assembly, the first propulsion assembly including a first self-propelled drive unit, a stationary portion of the first self-propelled drive unit mounted in a hoistway and a moving portion of the first self-propelled drive unit mounted to the car;
- obtaining a second propulsion assembly, the second propulsion assembly including a second self-propelled drive unit, a moving portion of the second self-propelled drive unit mounted to the second car;
- physically connecting the car and the second car;
- operating the car and the second car as a cargo lift;
- and
- configuring the car for passenger service by disconnecting the second car from the car.
4 more elements
An elevator system comprising:
- a car, configured to travel through a hoistway;
- a first stationary drive unit, mounted in the hoistway;
- a second stationary drive unit, mounted in the hoistway;
- a first movable drive unit functionally mounted to the car and driven by the first stationary drive unit, and
- a second movable drive unit, functionally mounted to the car and driven by the second stationary drive unit;
- a second car physically connected to the car;
- a third movable drive unit mounted to the second car and driven by the first stationary drive unit;
- and
- a fourth movable drive unit mounted to the second car and driven by the second stationary drive unit.
6 more elements
Dependencies are inferred from the claim text.