Metal working – Method of mechanical manufacture – Gear making
Reexamination Certificate
2006-03-16
2010-10-12
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Gear making
C029S893300, C029S407100, C074S458000
Reexamination Certificate
active
07810238
ABSTRACT:
In optimum number of teeth setting method for a helical gear pair and the helical gear pair manufactured on the basis of the set optimum number of teeth of each helical gear of the helical gear pair, a sound pressure level of a gear sound is compared with the sound pressure level of an audible limit with respect to a meshing frequency of the helical gear pair at a predetermined vehicle speed of an automotive vehicle in which the helical gear pair is mounted to select a frequency region in which the calculated sound pressure of the gear sound is relatively low to the sound pressure level of the audible limit, and number of teeth of each helical gear of the helical gear pair corresponding to the selected frequency region is set to an optimum number of teeth of each helical gear of the helical gear pair.
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Aoyama Eiichi
Hirogaki Toshiki
Nakano Yuusuke
Uenishi Yasuhiro
Bryant David P
Foley & Lardner LLP
Jatco Ltd
The Doshisha
Walters Ryan J
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