Title: Towing valve arrangement for fail-safe brake system

Abstract: A brake system having spring applied fluid pressure released brakes is provided with an auxiliary source of pressure for release of the brakes and a valve that is locked into an inoperative position effective to thereby render it tamper-proof.

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Inventors: Lloyd, Michael K. (Sandy City, UT, US)
Rosenberger, Paul C. (Decatur, IL, US)

Application Number: 545642
Filing Date: 1975-01-30
Publication_date: 1976-03-16
Assignee: Caterpillar Tractor Co. (Peoria, IL)
Primary Class(es): 303/89
Other Classes:
US Patent Ref:

273889	Mar, 1883	Platt	188/265.
1188853	Jun, 1916	Sorenson	188/265.
2963896	Dec, 1960	Hoffman	180/114.
3107126	Oct, 1963	Valentine	303/71.
3871475	Mar, 1975	Stevenson et al.	180/114.

Other Refs:
Primary Examiner: Reger, Duane A.
Assistant Examiner:
Attorney: Phillips, Moore, Weissenberger Lempio & Strabala