Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1977-03-03
1979-07-24
Husar, C. J.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
192109F, 74869, B60K 2100
Patent
active
041618955
ABSTRACT:
An hydraulic control system for automatic transmissions includes at least first and second engaging members, a transmission for establishing at least two change gear ratios due to the selective engagement of said first and second engaging members, a first servo-mechanism for controlling the engagement of the first engaging member for shifting to a high speed, and a second servo-mechanism for controlling the engagement of the second engaging member for shifting to a low speed. Shifting to a high speed is established due to engagement of the first engaging member and release of the second engaging member, and shifting to a low speed is established due to release of the first engaging member and engagement of the second engagement member. A shift timing valve controls the communication of the second servo-mechanism with an accumulator for use with the second servo-mechanism, in response to the build-up of a pressure to a given level in the first servo-mechanism.
REFERENCES:
patent: 3707890 (1973-01-01), Ito
patent: 3896705 (1975-07-01), Patton
patent: 3951011 (1976-04-01), Lemmon
patent: 4023444 (1977-05-01), Murakami
Fukumura Kagenori
Ushijima Fmihiro
Husar C. J.
McKenzie, Jr. Frank H.
Toyota Jidosha Kogyo Kabushiki Kaisha
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