Control valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 16, 1988
Issued Date -
N/A
app pub date -
May 26, 1987
filing date -
Jan 21, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control valve includes a pulse motor 1, the threaded shank 4 of a ball screw 3 connected to the output shaft 2 of the motor, a slider 6 united with a nut 5 on the ball screw 3, and a valve stem 8 extending outward from a valve assembly 7 and connected to the slider 6. Two cases 9 and 10, each in the form of a vertical cylinder having a bottom, are fitted together in vertical alignment, and the pulse motor 1 is placed on the upper end of the upper case 9 to close the end opening thereof, with the output shaft 2 extending into the upper case 9. The slider 6 is housed in the lower case 10 and has its peripheral wall coupled to the inner surface of the lower case 10 so as to be vertically slidable. The threaded shank 4 extends through and is rotatably supported by the bottom wall 22 of the upper case 9. The valve assembly 7 is fixed to the bottom wall 41 of the lower case 10.
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