Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1992-01-27
1994-04-26
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
F16H 6100
Patent
active
053056647
ABSTRACT:
A hydraulic control device for an automatic transmission comprises a shift valve and a control valve which are coaxially aligned in a valve chamber. The shift and control valves of a spool type control connecting states of first and second clutches of the automatic transmission, respectively. The shift and control valves are separated by a retainer having a through-hole through which a part of the control valve pushes the control valve so as to change the operating state of the control valve. The shift valve takes one of a first state where a hydraulic chamber of a first clutch is communicated with a drain port and a second state where the first clutch hydraulic chamber is communicated with a line pressure. In the first state of the shift valve, the control valve is set to control the line pressure and communicate a hydraulic chamber of a second clutch and the controlled line pressure. In the second state of the shift valve, the control valve is pushed by the shift valve and is set to communicate the second clutch hydraulic chamber and a drain port.
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Nissan Motor Co,. Ltd.
Wright Dirk
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