Sealing device for operating shafts in food processing machines
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United States of America Patent
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Jun 28, 1994
Grant Date -
N/A
app pub date -
Nov 4, 1992
filing date -
Jun 18, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
The shaft (16) goes through a hole in a wall (10). A bushing (26) is attached to the wall and carries a first gasket (28) adjacent to the wall and sealing against the shaft (16) and a lip seal (32) at a distance from the first gasket so that a toroidal chamber (34) is defined between the first gasket, the web, the bushing and the shaft. An inlet passage (44), preferably bored in the body of the bushing, connects said toroidal chamber (34) with a source of pressurized water, and an outlet passage (48), also preferably bored in the body of the bushing, drains the water from the toroidal chamber (34).
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