Positioning structure between parts of different materials and assembly structure of motor
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United States of America Patent
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-
Nov 30, 2010
Grant Date -
Feb 1, 2007
app pub date -
Jul 24, 2006
filing date -
Jul 28, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A first part formed of a first material is positioned to a second part formed of a second material, which is different from the first material in degree of modification due to environmental variation, by contacting surfaces of the first and second parts. At least three projections are formed on the contact surface of the first part along a circle whose center is coincident with a reference point. Grooves are formed on the contact surface of the second part so that the respective projections are fitted therein and that have wall surfaces to which the projections can contact at the inner and outer sides of the projections. The width of the grooves is determined so that the projections contact the inner or outer wall surface of the grooves even when the first and second parts deform in different degrees due to environmental variation.
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