Invention Grant
- Patent Title: Forestry grapple with high pressure protection system
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Application No.: US15065867Application Date: 2016-03-10
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Publication No.: US10066644B2Publication Date: 2018-09-04
- Inventor: Patrick Opdenbosch
- Applicant: Caterpillar Forest Products Inc.
- Applicant Address: US IL Peoria
- Assignee: Caterpilllar Forest Products Inc.
- Current Assignee: Caterpilllar Forest Products Inc.
- Current Assignee Address: US IL Peoria
- Main IPC: F15B11/04
- IPC: F15B11/04 ; F15B11/044 ; A01G23/00

Abstract:
A hydraulic control system for a work implement is provided. The hydraulic control system includes first hydraulic circuit and second hydraulic circuit. The first hydraulic circuit includes a selector valve and a pair of hydraulic cylinder assembly. Each hydraulic cylinder assembly includes a head end, a rod end, a cylinder, and a rod. The selector valve is configured to operate in neutral position and at least one operating position to selectively connect either the head end or the rod end to a fluid source, and the other of the head end or the rod end to fluid tank. The second hydraulic circuit includes a counterbalance valve and a shuttle valve. The counterbalance valve selectively connects the head end to the fluid tank. The shuttle valve is configured to maintain predefined pressure at relief side pressure port of the counterbalance valve to maintain a threshold pressure at the head end.
Public/Granted literature
- US20160186787A1 FORESTRY GRAPPLE WITH HIGH PRESSURE PROTECTION SYSTEM Public/Granted day:2016-06-30
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