Machine element or mechanism – Elements – Gear casings
Patent
1988-03-31
1990-02-20
Aschenbrenner, Peter A.
Machine element or mechanism
Elements
Gear casings
475146, F16H 5702
Patent
active
049016059
ABSTRACT:
In an automatic transmission, an arrangement for discharging band servo operating hydraulic pressure comprises an upstanding passage and a communication passage formed in a transmission case, and a discharge valve installed in the communication passage. The upstanding passage is so formed as to extend inwardly or upwardly from a control valve body joining surface of the transmission case. The communication passage is so formed as to extend inwardly from an outer peripheral portion of the transmission case adjacent an oil pump cover joining surface thereof to fluidly connect a servo cylinder chamber to the upstanding passage which is in turn fluidly connected to a servo release passage of a control valve assembly. The discharge valve is in the form of a check valve and disposed in the open end of the communication passage which is located at the above described peripheral portion of the transmission case adjacent the oil pump cover joining surface thereof.
REFERENCES:
patent: 4631980 (1986-12-01), Ishimori
patent: 4640152 (1987-02-01), Quick et al.
patent: 4693141 (1987-09-01), Iwanaga
patent: 4738159 (1988-04-01), Kato et al.
Aschenbrenner Peter A.
Nissan Motor Co,. Ltd.
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