Differential gear
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United States of America Patent
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May 29, 2012
Grant Date -
Apr 2, 2009
app pub date -
Sep 25, 2008
filing date -
Sep 28, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a differential gear, a differential case includes: a first differential case on a side ranging from a pinion-shaft installation part on which a pinion shaft is installed, to a ring gear; and a second differential case on a side opposite to the side ranging from a pinion-shaft installation part on which the pinion shaft is installed, to the ring gear. The first differential case is integrally molded from only a low-carbon steel containing less than 0.45% of C, by forging or by forging and cutting. The second differential case is integrally molded from only a low-carbon steel containing less than 0.45% of C, by forging or by forging and cutting. The first differential case and the second differential case are bonded to each other by welding.
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