Method and apparatus for compensating for axial deformation of screw shafts due to heat treatment

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United States of America Patent

PATENT NO 4459164
SERIAL NO

06451390

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Abstract

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A method and apparatus for compensating for axial deformation of screw shafts due to heat treatment, wherein in the process of hardening of a screw shaft, the screw shaft is twisted to produce permanent twist deformation by an amount corresponding to the pitch error of the screw shaft caused by hardening, so as to correct the pitch error.

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Patent Owner(s)

Patent OwnerAddress
NTN TOYO BEARING COMPANYLIMITED 3-17 KYOMACHIBORI 1-CHOME NISHI-KU OSAKA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goto, Fumikazu Iwata, JP 2 4
Yoshioka, Morihisa Hamamatsu, JP 10 89

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