Device for automatic closing of cut-off throttle at hose reels
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United States of America Patent
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Oct 27, 1998
Grant Date -
N/A
app pub date -
Feb 3, 1997
filing date -
Aug 11, 1994
priority date (Note) -
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Abstract
An apparatus for extracting gases comprises a rotatable reeling drum, a suction hose, a cut-off throttle, a position changing device, and a pivoting means. The position changing device cooperates with the pivoting means to open the cut-off throttle during initial rotation of the reeling drum in a direction of unwinding the suction hose and close the cut-off throttle within a first revolution of the reeling drum in a direction of winding the suction hose.
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