OPENTECHNICAL PUBLICATION
OT-2026-000002690

Multiple brake hoist for overhead crane

Published: 2026-09-15T19:14:41.847055Z
Permanent URL: https://opentechnical.org/p/OT-2026-000002690
Categories: Lifting, Positioning & Manipulation > Hoists and Cranes

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ABSTRACT

A multiple brake hoist system includes a hoist for lifting and lowering a load
and a power supply for supplying electrical power to the hoist. The power
supply is configured to retain electromagnetic and capacitive energy upon
deactivation. Primary and secondary brakes engage the hoist upon deactivation
from the power supply. The primary and secondary brakes are connected to the
power supply in a fail-safe configuration to maintain a non-engaged state on
the hoist during activation of the power supply. The primary brake establishes
an engaged state on the hoist upon deactivation from the power supply. The
secondary brake establishes an engaged state on the hoist after a
predetermined time-delay associated with consuming the predetermined amount of
electromagnetic and capacitive energy of the power supply upon deactivation.
In this manner, the primary and secondary brakes prevent a differential
torsional stress between the mechanical components upon deactivation of the
power supply.

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OpenTechnical publication OT-2026-000002690
Published 2026-09-15T19:14:41.847055Z
https://opentechnical.org/p/OT-2026-000002690