Vacuum control valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 26, 2003
Grant Date -
Mar 6, 2003
app pub date -
Sep 6, 2001
filing date -
Sep 6, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vacuum control valve comprises a valve chamber with a valve opening which has a portion with a cylindrical inside wall on which an elastic sealing washer is provided. A closing body is included which comprises a cylindrical portion with a first end and a second end, adjoined by a portion of the closing body that widens into a cone, wherein at least one groove is present in the cylindrical portion of the closing body which extends to the first end of the cylindrical portion and which either widens along its extent to the first end, or deepens, or widens as well as deepens. An operating device is also included for the closing body which comprises a valve rod to which the closing body is attached and a drive device, wherein the closing body can be moved by means of the operating device, from a completely open position of the valve where the closing body has been pulled out of the elastic sealing washer, through a control range where the sealing washer encloses the cylindrical portion of the closing body, to a completely closed position where the portion of the closing body that widens into a cone is pressed against the sealing washer.
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