Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1975-04-23
1977-02-01
Scott, Samuel
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74869, B60K 4118
Patent
active
040056201
ABSTRACT:
To control the changeover between different speed ratios in an automotive transmission, with the aid of hydraulically actuatable clutches and brakes, a 1-2 shift valve (70) and a 2-3 shift valve (90) responsive to a speed-dependent fluid pressure are subjected to a countervailing load-dependent fluid pressure generated by a throttle valve (40), under the control of the vehicular accelerator, above a predetermined intermediate point of the load range. Fluid for the actuation of the clutches and brakes, under a pressure rising in the lower part of the load range and remaining constant in its upper part, is delivered by a modulating valve (340) in cascade with the throttle valve, provided with a limitedly displaceable slider, or by cascaded modulating and limiting valves (350, 357).
REFERENCES:
patent: 3561296 (1971-02-01), Iijima
patent: 3593599 (1971-07-01), Dach
patent: 3667323 (1972-06-01), Irie
patent: 3752015 (1973-08-01), Murakami
patent: 3831465 (1974-08-01), Murakami
patent: 3840039 (1974-10-01), Shellman
patent: 3895542 (1975-07-01), Miyauchi
patent: 3895547 (1975-07-01), Murakami
Dach Hansjorg
Marion Robert
Chandler Lance W.
Dubno Herbert
Ross Karl F.
Scott Samuel
Zahnradfabrik Friedrichshafen AG
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