Invention Grant
- Patent Title: Felling saw recovery control
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Application No.: US14677784Application Date: 2015-04-02
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Publication No.: US10221870B2Publication Date: 2019-03-05
- Inventor: Nicholas M. Goedken , Calin Raszga , Matthew J. Ramler
- Applicant: DEERE & COMPANY
- Applicant Address: US IL Moline
- Assignee: DEERE & COMPANY
- Current Assignee: DEERE & COMPANY
- Current Assignee Address: US IL Moline
- Agency: Klintworth & Rozenblat IP LLP
- Main IPC: F15B13/04
- IPC: F15B13/04 ; A01G23/091 ; B23D47/12 ; F15B15/08

Abstract:
A hydraulic system for a felling saw head includes a hydraulic motor, operatively coupled to a saw disc of the saw head, a hydraulic variable displacement pump, operatively coupled to the hydraulic motor to supply pressurized fluid to the motor, and a controller configured to control the pump. To provide a target operating speed of the saw disc, the motor is configured to operate at a first displacement corresponding to a first flow rate of hydraulic fluid through the motor During at least a part of a saw recovery operation, the controller controls the pump to operate at a current pump displacement that results in a flow rate of hydraulic fluid through the pump that exceeds the first flow rate through the motor. Saw recovery time may be reduced without overspeeding the saw by including a metered flow control device between the pump and the motor.
Public/Granted literature
- US20160146226A1 FELLING SAW RECOVERY CONTROL Public/Granted day:2016-05-26
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