US 6,416,368 B1 · Unitary inboard electric marine propulsion system

Abstract

An electric propulsion system for watercraft, such as fishing boats, includes an electric motor disposed within a dry cavity of the craft hull, and a prop disposed outboard, below a waterline of the craft. The prop is driven by the motor via a support and power transmission assembly. The motor and prop may be supported by the support and power transmission assembly. A seal assembly is provided at the location where the support and power transmission assembly passes through the hull. A pair of similar propulsion systems may be provided at symmetrical locations with respect to a longitudinal centerline of the hull. Control circuitry permits navigational commands to be input by an operator and translated to speed commands for the propulsion system or systems. The system may remain deployed at all times without the need to retract and stow the prop or motor during transport.

Claims30

Dependent claims

A propulsion system for a watercraft, the watercraft including a hull having an inboard cavity and an outboard surface, the system comprising:

a drive assembly configured to be disposed within the inboard cavity of the hull, the drive assembly including a variable speed electric motor;
a propulsion assembly configured to be disposed outboard of the hull within a region substantially below a waterline during use, the propulsion assembly including a prop for displacing water to produce thrust;
and
a support and power transmission assembly coupled between the drive assembly and the propulsion assembly, the support and power transmission assembly transmitting torque from the drive assembly to the propulsion assembly when the electric motor is driven during use.

1 more element

Dependencies are inferred from the claim text.

Unitary inboard electric marine propulsion system

Life of this patent

Unitary inboard electric marine propulsion system

Life of this patent

Abstract

Claims30