Automatic power transmission shift valve

Details Automatic power transmission shift valve Automatic power transmission shift valve

1978-11-24

1981-10-27

Braun, Leslie

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74861, 74863, 74864, 74867, B60K 4106, B60K 4110

Patent

active

042966515

ABSTRACT:
A shift valve for use in a hydraulic control system of an automatic power transmission, having valve spools formed with a plurality of pressure acting areas which can be selected independently of each other for providing shift points for upshifting and downshifting under part-throttle and full throttle conditions of the engine.

REFERENCES:
patent: 2955482 (1960-10-01), Winchell
patent: 3136175 (1964-06-01), Ivey
patent: 3605525 (1971-09-01), Pierce et al.
patent: 3625090 (1971-12-01), Chana
patent: 3667323 (1972-06-01), Irie
patent: 3685372 (1972-08-01), Miyazaki
patent: 3691872 (1972-09-01), Schaefer et al.
patent: 3710652 (1973-01-01), Miyazaki
patent: 3818783 (1974-06-01), Norris et al.
patent: 3886819 (1975-06-01), Lentz
patent: 4020718 (1977-05-01), Miyazaki et al.

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