Overspeed safety mechanism for lift car
AssigneeSafeWorks, LLC
InventorsDavid Arevalo Romo, Gregory Scott McDonald
Life of this patent
Estimating the term…
Abstract
An overspeed safety braking mechanism for lift cars and elevator systems is described herein. The safety mechanism may comprise a safety kit secured to an overhead portion of a lift car, and configured to engage a cable to prevent a downward movement of the lift car. Engagement of the cable may occur when a threshold speed is reached. The overhead portion of the lift car is detachable upon a predetermined upward force resulting from an engagement of the safety cable from the safety kit. A primary brake system may be positioned beneath the safety kit, on or near a lift platform, configured to engage the safety cable in response to an activation of the safety kit and a detection of the threshold speed.
Claims19
An overspeed safety system for a lift car, comprising:
- a safety kit secured to an overhead portion of a lift car, wherein the safety kit is configured to engage a safety cable to slow a downward movement of the lift car when a threshold speed is reached, and the overhead portion is detachable from the lift car upon a predetermined upward force resulting when the overhead portion decelerates faster than the lift car;
- an attachment securing the safety kit to the overhead portion of the lift car;
- and
- a brake system positioned beneath the safety kit, configured to engage the safety cable and at least one support cable to prevent a downward movement of the lift car, in response to at least one of an activation of the safety kit and a detection of the threshold speed.
An overspeed safety method for a lift car connected to one or more cables, comprising:
- engaging a safety cable with a safety kit when a threshold speed is reached to slow a downward movement of the lift car, wherein the safety kit securely attaches to an overhead portion of the lift car engages the cable when the threshold speed is reached, and wherein the overhead portion detaches from the lift car upon a predetermined upward force resulting from the overhead portion decelerates faster than the lift car;
- engaging the safety cable and at least one support cable, using a brake system positioned beneath the safety kit, in response to at least one of an activation of the safety kit and a detection of the threshold speed.
Dependencies are inferred from the claim text.