B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
305/40, 303/70,
B62D 11/08 (2006.01)
Patent
CA 1084088
Abstract of the Disclosure Steering control valves selectively pressurize and vent fluid-actuated clutches and brakes of a crawler tractor steering system. Each control valve has an in- ternal spool assembly, coupled to a foot pedal by a cable, which modulates brake pressure as a function of pedal po- sition and which establishes a maximum brake fluid pressure thereby eliminating the need for additional system compo- nents for such purposes. The control valves also provide a feedback fluid pressure, to resist pedal depression with a force proportional to the brake fluid pressures enabling an operator to sense the degree of braking which is present at different degrees of pedal depression.
305450
Caterpillar Tractor Co.
Kirby Eades Gale Baker
LandOfFree
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