Vacuum pump with a gas ballast device
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United States of America Patent
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-
Feb 16, 1999
Grant Date -
N/A
app pub date -
Jan 29, 1996
filing date -
Jul 28, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention pertains to a vacuum pump (1) with a closable line (63, 102) through which gas ballast can be fed into the pump chamber (8, 9); to eliminate the danger that a recipient hooked up to the vacuum pump may be charged with air in the event of a pump failure, the invention proposes that the line be equipped with a control valve (59, 60, 61; 98, 99; 109, 110) to regulate the gas ballast feed as a function of operating conditions, such that the line is closed in the event of a pump failure.
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Cited Art Landscape
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