Gear and method of making the same
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United States of America Patent
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-
Sep 27, 2005
Grant Date -
Mar 18, 2004
app pub date -
Dec 4, 2000
filing date -
Dec 6, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order that a worm 1 is rotated, a clearance (a region constituting a clearance portion between bearings and a worm gear) is formed (FIGS. 4(1) to (3)) in an upper surface of a base plate 3. A mold 12 for forming a lower half region of the worm therein is formed (FIG. 4(8)). A material 5 for the worm is deposited (FIG. 4(9)) to a height equal to that of a lower half region plus that of an upper half of the worm. An upper half of the worm is formed (FIGS. 4(10) to (12). Finally, the material 13 in the clearance between the base plate 3 and gear 1 is removed (FIG. 4(13)).
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