LIFTING ASSEMBLY WITH A BOAT LIFT TRANSMISSION DEVICE
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United States of America Patent
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Issued Date -
Nov 10, 2022
app pub date -
May 4, 2021
filing date -
May 4, 2021
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Abstract
A lifting device for lifting various vessels includes a two-speed boat lift transmission enables a boat lift to operate at two speeds, i.e. a high speed when the lift is empty or when lowering a boat, and a low speed when lifting the boat. The worm gear drive acts as a speed reducer and it provides locking, so the boat lift cannot back drive. The novel idea of incorporating a harmonic drive differential transmission into the gearbox assembly allows the use of two inputs and ratios, enabling both high speed and low speed operation.
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