Handwheel modified for improved lubrication and cooling
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United States of America Patent
Stats
-
Feb 25, 1986
Grant Date -
N/A
app pub date -
Sep 21, 1983
filing date -
Sep 21, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sewing machine has a housing and a mechanism in the housing for actuating the sewing elements of the machine. The mechanism includes a rotating shaft with a drive end which protrudes from the housing and carries a handwheel. The handwheel has a surface which is proximate to the housing to provide a thin space between the surface and the housing. Wheel rotation during machine operation causes centrifugal movement of air in the space toward the circumference of the space. The wheel has openings which supply air to the space to cool the wheel and prevent the aspiration of fluids from the housing by the centrifugal movement of air in the space.
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