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US 4,226,200 AGranted
Automatic transmission casing
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorsKunio Morisawa, Tatsuo Kyushima
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Abstract
An automatic transmission for vehicles including a fluid torque converter, a change-over gear mechanism, and an oil pressure control means, wherein the oil pressure control means is substantially composed of a grooved portion formed integrally with the housing of the transmission, a first valve body means adapted to engage a first part of the grooved portion and providing a manual shift valve, and a second valve body means adapted to engage a second part of the grooved portion and providing other hydraulically operated control valves.
Claims9
An automatic transmission, comprising:
- (a) a casing with an integral grooved portion comprising a plurality of oil passage circuits;
- (b) a changeover gear mechanism, supported within the casing and including a plurality of oil pressure operated servo mechanisms, which provides various speed stages in accordance with variation of supply of oil pressure to the servo mechanisms;
- (c) a first valve body member directly engaged with a first part of the grooved portion and which incorporates a manually controlled shift valve which when operated varies supply of oil pressure to the servo mechanisms and changes over the speed stages manually;
- and
- (d) a second valve body member directly engaged with a second part of the grooved portion and which incorporates a plurality of hydraulically operated control valves which shift in accordance with supply of oil pressure, and which by shifting varies supply of oil pressure to the servo mechanisms and change over said speed stages automatically.
2 more elements
Dependencies are inferred from the claim text.