Powerhead assembly and hoisting system
OwnerByron Wayne Painterinventor
Life of this patent
Estimating the term…
Abstract
An electrically powered hoisting system is operated by seating a line attached to the load to be hoisted in a groove formed between two sheave components and activating the electrical drive motor to rotate the sheave assembly. Voltage for the electrical drive motor is provided by an on-board 12 volt battery and voltage to the drive motor is controlled by means of a switch device. The groove formed by the sheave components has a resilient gripping surface that provides a firm line gripping action and hands-free and self-tailing operation. A davit, davit mounting brackets, and a flexible mounting assembly for mounting the powerhead assembly to a support are also disclosed.
Claims17
A powerhead assembly for use in a hoisting system comprising:
- an electrical drive motor having a drive motor output shaft and capable of producing rotation of the drive motor output shaft;
- a gear reduction unit having a gear reduction output shaft, the gear reduction unit being engaged with the drive motor output shaft and capable of producing rotation of the gear reduction output shaft at a slower rotation and higher torque than the rotation of the drive motor output shaft;
- a housing enclosing the electrical drive motor and the gear reduction unit and additionally comprising a mounting joint mountable to the housing and to a support structure for mounting the powerhead assembly to the support structure, the mounting joint permitting rotation of the powerhead assembly on a generally horizontal plane and limiting swinging of the powerhead assembly out of the horizontal plane;
- and
- a sheave assembly comprising two sheave components, each having a resilient gripping surface, mounted on the gear reduction output shaft in a mirror image relationship and adjacent to one another to form a groove for receiving and gripping a line during a hoisting operation.
A hoisting system comprising:
- an electrical drive motor capable of producing rotation of a drive motor output shaft
- a motor casing enclosing the electrical drive motor and additionally comprising a mounting joint for mounting the motor casing to a support structure that permits rotation of the motor casing in a generally horizontal plane and that limits swinging of the motor casing out of the horizontal plane;
- and
- a sheave assembly comprising two sheave components having resilient gripping surfaces mounted in a mirror image relationship to one another to form a groove having resilient gripping surfaces for receiving and gripping a line during a hoisting operation, the sheave assembly adapted to be rotated by rotational output of the drive motor.
Dependencies are inferred from the claim text.