Invention Grant
- Patent Title: System for controlling the operation of a hydraulic winch
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Application No.: US16217387Application Date: 2018-12-12
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Publication No.: US11339038B2Publication Date: 2022-05-24
- Inventor: Timothy L. Hand , Andrew J. Kieser
- Applicant: Caterpillar Inc.
- Applicant Address: US IL Deerfield
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Deerfield
- Agency: Leydig, Voit & Mayer, Ltd.
- Main IPC: B66D1/50
- IPC: B66D1/50 ; E02F9/20 ; B66D1/08 ; B66D1/48 ; B66D5/26

Abstract:
A system for controlling a winch assembly having a hydraulic motor, a drum, a cable, and a cable tension sensor. A controller is configured to access a winch load threshold defining a hold zone and a reel zone, and one of the hold zone and the reel zone including loads greater than the winch load threshold and another of the hold zone and the reel zone including loads less than the winch load threshold. The controller is further configured to determine whether the winch assembly is operating within the hold zone or the reel zone, and generate a zero flow command while the winch assembly is operating within the hold zone to prevent rotation of the hydraulic winch motor, and generate a pressure differential command while the rotatable winch drum is operating within the reel zone to permit rotation of the hydraulic winch motor.
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