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1. (WO2018101980) IMPROVED CLAMP FORCE CONTROL SYSTEM FOR LIFT TRUCK ATTACHMENT WITH SECONDARY HYDRAULIC FORCE CONTROL CIRCUIT

Pub. No.:    WO/2018/101980    International Application No.:    PCT/US2017/031368
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Sat May 06 01:59:59 CEST 2017
IPC: B66F 9/18
B66F 9/00
Applicants: CASCADE CORPORATION
Inventors: WALTHERS, Christopher, M.
Title: IMPROVED CLAMP FORCE CONTROL SYSTEM FOR LIFT TRUCK ATTACHMENT WITH SECONDARY HYDRAULIC FORCE CONTROL CIRCUIT
Abstract:
An improved hydraulic control system for a lift truck attachment having opposed clamp arms that selectively grip and release a load. The improved hydraulic system utilizes a secondary hydraulic force control circuit that increases the gripping force on the load independently of inward movement of the clamp arms.