Boat lifting apparatus
AssigneeSuperior Gearbox Company
InventorCharles A. Fox
Life of this patent
Estimating the term…
Abstract
This boat lift drive is used for raising and lowering a wide range of boat size. The boat drive is a two stage worm system and uses a drive motor having a motor shaft driving a first worm and a first worm wheel as a first stage, and driving a second worm and a second worm wheel, as second stage. At least one of said worm shafts has a copper alloy intermediate worm portion. A third stage is provided having a spool driven by the second worm wheels, the spool having a cable disposed thereabout for lifting the boat.
Claims5
A boat lift drive system for raising and lowering a boat, the system comprising:
- a drive motor having a drive shaft;
- a first shaft connected to the motor drive shaft, the first shaft including a first worm;
- a first worm wheel engageable by the first worm, the first worm wheel rotating a second shaft, a second worm on the second shaft, at least one of said first and second worms being of copper alloy secured to its associated shaft;
- a second worm wheel rotated by the second worm;
- the second worm wheel being operatively connected to a spool having a cable disposed thereabout and operatively disposed for lifting a boat;
- the second worm wheel being ferrous and the second worm being copper alloy.
A boat lift drive system for the raising and lowering of a boat, the system comprising:
- a drive motor having a drive shaft;
- a first stage including a copper alloy worm having an axis of rotation aligned with the motor drive shaft;
- and a ferrous worm wheel;
- a second stage including a ferrous shaft having a copper alloy worm secured to the shaft and a ferrous worm wheel;
- a third stage including a spool operatively connected to the second stage ferrous worm wheel the spool having a cable disposed thereabout and operatively disposed for lifting a boat.
Dependencies are inferred from the claim text.