Valve and valve control method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 3, 2001
Issued Date -
N/A
app pub date -
Aug 1, 2000
filing date -
Jan 11, 1999
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A vacuum actuated valve uses a specially designed spring having a spring rate as a function of valve position. The spring rate function is determined using physical relationships between flow, pressure, and valve s position. The result is that the relationship between the control input to the valve (either a vacuum signal, or an electrical signal to a vacuum source) and the flow through the valve are linearly related through the entire operating region of the valve.
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