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US 10,329,120 B2Granted
Elevator overspeed governor
AssigneeOtis Elevator Company
InventorRandall S. Dube
Life of this patent
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Abstract
An elevator governor rotor comprises a central axis and a plurality of pairs of lobes. Each pair of lobes comprises an inner lobe and an outer lobe.
Claims23
An elevator governor rotor comprising:
- a central axis;
- and
- a plurality of pairs of lobes, each pair of lobes comprising:
- an inner lobe and an outer lobe,
- wherein:
- each of the inner lobes and outer lobes comprises:
- a distal protuberant portion;
- and
- a generally circumferentially extending radially outboard flexing portion;
- and
- in a zero-speed condition, the inner lobes are nested between the protuberant portion and flexing portion of the associated outer lobe.
8 more elements
An elevator governor jaw system comprising:
- a first jaw shiftable from a disengaged position to an engaged second position via a partially downward motion;
- a second jaw spring biased toward the first jaw when the first jaw is in the engaged position so as to clamp the rope between the first jaw and the second jaw;
- and
- means for restraining upward movement of the first jaw from the engaged position,
- wherein:
- the means comprises a restraining member shiftable from a retracted position to an extended position under bias of a spring;
- and
- a linkage is configured to hold the restraining member in its retracted condition until actuated by a dropping of the first jaw from the disengaged position to the engaged position so as to release the restraining member.
5 more elements
A method for using an elevator, the elevator comprising:
- a car mounted in a hoistway for vertical movement;
- an elevator machine coupled to the car to vertically move the car within the hoistway;
- an elevator governor configured to allow a higher car-upward speed than car-downward speed and comprising:
- elevator governor rotor comprising:
- a central axis;
- and
- a plurality of pairs of lobes, each pair of lobes comprising an inner lobe and an outer lobe
- a sheave mounted for rotation about the axis;
- and
- a sensor positioned to interface with the rotor in at least a portion of a speed range of the rotation;
- and
- a rope engaging the sheave to rotate the rotor as the car moves vertically the method comprising:
- shifting the restraining ring in association with a change in direction of the elevator.
10 more elements
Dependencies are inferred from the claim text.