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1. (WO2017201452) SELF-PROPELLED VEHICLES INCLUDING A DIFFERENTIAL SYSTEM

Pub. No.:    WO/2017/201452    International Application No.:    PCT/US2017/033615
Publication Date: Fri Nov 24 00:59:59 CET 2017 International Filing Date: Sat May 20 01:59:59 CEST 2017
IPC: B62D 1/00
Applicants: VERMEER MANUFACTURING COMPANY
Inventors: DOCKTER, Nathan D.
RECKER, Kent M.
BURNS, Gary J.
THOMPSON, Kent L.
REMPE, Scott A.
KNAPP, Jeffrey T.
GRAHAM, Curt T.
Title: SELF-PROPELLED VEHICLES INCLUDING A DIFFERENTIAL SYSTEM
Abstract:
Self-propelled vehicles that include swiveling caster wheels and independent drive wheels are disclosed. The self-propelled vehicles are selectively steered in a caster wheel steering mode or a drive wheel steering mode. The vehicle includes a differential system that may include a differential valve that allows hydraulic fluid to be transferred between the left and right drive systems. The differential system may be operable during the caster wheel steering mode such as when the vehicle is driven for transport between sites.