B - Operations – Transporting – 60 – P
Patent
B - Operations, Transporting
60
P
214/27, 138/74.1
B60P 1/16 (2006.01) E02F 9/22 (2006.01)
Patent
CA 1167741
Abstract A maximum lift system for a hydraulic hoe includes a dual pressure relief valve in the hoist circuit and an actuat- ing valve that delivers a signal to the relief valve to in- crease hoist capacity and simultaneously causes operation of lockout valves to center the wrist control valve and thus lock the dipper in position.
412171
Christensen Norman B.
Ecker Frank A.
Jensen Theodore G.
Bucyrus-Erie Company
Hewitt Neville S.
LandOfFree
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