Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Separate valve means actuatable by a common nonmanual...
Patent
1978-02-09
1979-08-07
Geoghegan, Edgar W.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Separate valve means actuatable by a common nonmanual...
91522, 60486, 180 648, F15B 1306, F15B 1309
Patent
active
041634136
ABSTRACT:
A vehicle includes first and second drive transmission assemblies, each having a control element and associated control valve for selectively establishing forward and reverse operation thereof. A control system therefore includes a plurality of master and slave cylinders for individually moving the control elements, a first manual control for operating the transmission assemblies at substantially the same speed and direction, and a second manual control for controllably altering or overriding the first manual control for steering purposes.
REFERENCES:
patent: 3187509 (1965-06-01), Moon
patent: 3774707 (1973-11-01), Bridwell et al.
patent: 3803841 (1974-04-01), Erickson et al.
patent: 3946560 (1976-03-01), MacIntosh et al.
Caterpillar Tractor Co.
Geoghegan Edgar W.
Lanchantin, Jr. Charles E.
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