Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1985-09-06
1988-02-23
Braun, Leslie
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74740, 74878, 180247, B60K 4106
Patent
active
047262621
ABSTRACT:
An automatic transmission for motorcar of the type including a main transmission and an auxiliary transmission is disclosed. The auxiliary transmission has a plurality of speed changing stages and when it assumes a certain lower speed stage, any speed changing to higher speed stage is inhibited in the main transmission. The main transmission is provided with a solenoid valve which makes it possible to carry out speed changing to higher speed stage when it is turned on, while the auxiliary transmission is provided with a hydraulic control device which is communicated with a hydraulic servo via a hydraulic passage. The hydraulic servo is operatively associated with a speed reduction frictional engagement element which allows the auxiliary transmission to assume a certain lower speed stage. The solenoid valve is electrically connected to a pressure switch which is so constructed that it is turned off when the hydraulic servo is supplied with hydraulic oil and it is turned off when hydraulic pressure is released from the hydraulic servo. When the auxiliary transmission assumes a certain lower speed stage, the hydraulic servo is supplied with hydraulic oil and the solenoid valve is turned off. Thus, any speed changing to higher speed stage is inhibited in the main transmission.
REFERENCES:
patent: 3939722 (1976-02-01), Stromberg
patent: 3939733 (1976-02-01), Wetrich
patent: 4312248 (1982-01-01), Sugimoto et al.
patent: 4325450 (1982-04-01), Ward
patent: 4373409 (1983-02-01), Benedek et al.
patent: 4503927 (1985-03-01), Hayakawa et al.
Fujiura Kaiya
Harada Yoshiharu
Hayakawa Yoichi
Watanabe Kazuaki
Aisin Warner Limited
Braun Leslie
Diehl Dwight
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