- Patent Title: System and methods for controlled lowering and lifting of a load
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Application No.: US14106112Application Date: 2013-12-13
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Publication No.: US10533304B2Publication Date: 2020-01-14
- Inventor: Michael Berne Rannow , Vishal Vijay Mahulkar
- Applicant: Eaton Intelligent Power Limited
- Applicant Address: IE Dublin
- Assignee: Eaton Intelligent Power Limited
- Current Assignee: Eaton Intelligent Power Limited
- Current Assignee Address: IE Dublin
- Agency: Merchant & Gould P.C.
- Main IPC: E02F9/24
- IPC: E02F9/24 ; F15B11/15 ; F15B20/00 ; E02F9/22

Abstract:
A system and method for the controlled lowering and lifting of a load are disclosed. The system and method may include operating a work machine having a hydraulic system including a hydraulic actuator for supporting a load, a first control valve in fluid communication with the actuator, and a controller for operating the first control valve. In one embodiment, the controller includes a first algorithm for operating the first control valve in a load lowering operation. When an operational fault within the hydraulic system is detected, the controller can be configured to enter into a safe lowering mode. In the safe lowering mode, the first algorithm is disabled and a pulse width modulation (PWM) current is sent from the controller to the first control valve. A user interface is provided to allow an operator to control the PWM current duty ratio to allow the load supported by the actuator to be lowered.
Public/Granted literature
- US20140165547A1 SYSTEM AND METHODS FOR CONTROLLED LOWERING AND LIFTING OF A LOAD Public/Granted day:2014-06-19
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