192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1979-04-13
1981-08-18
Krizmanich, George H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 12C, B60K 4120
Patent
active
042841828
ABSTRACT:
A crawler tractor vehicle having fluid actuated steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. The vehicle further includes a transmission operable upon supply of fluid pressure thereto and a priority valve for providing that a certain level of fluid pressure is supplied to the brake system to provide a disengagement thereof prior to fluid pressure being supplied to the transmission.
REFERENCES:
patent: 2941639 (1960-06-01), Christenson et al.
patent: 3159247 (1964-12-01), Charlton
patent: 3181667 (1965-05-01), Lohbauer et al.
patent: 3460645 (1969-08-01), Brown et al.
patent: 3498427 (1970-03-01), Bingley
patent: 4029183 (1977-06-01), Toyomura
patent: 4101004 (1978-07-01), Oltman
patent: 4164276 (1979-08-01), Shore
Burdette Stephen D.
Cackley George W.
Hakes Gary A.
Morris Hugh C.
Shook Norma G.
Caterpillar Tractor Co.
Krizmanich George H.
Meyer Sheldon R.
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