Data processing: generic control systems or specific application – Specific application – apparatus or process – Mechanical control system
Reexamination Certificate
2005-10-11
2005-10-11
Cabrera, Zolia (Department: 2125)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Mechanical control system
C073S862230, C173S176000, C081S467000
Reexamination Certificate
active
06954682
ABSTRACT:
According to a bolt tightening method and a bolt tightening apparatus of the invention, a bolt is tightened by using a bolt tightening device, in which torque gradients expressed in terms of the ratio of a tightening torque exerted on the bolt to its turning angle are calculated by successively detecting the tightening torque at intervals of a specific bolt turning angle and calculating an average of individual torque gradient values by first and second torque gradient calculators, and the amount of tightening of the bolt is controlled by a tightening amount controller based on the average of the individual torque gradient values calculated.
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Japanese Office Action issued on Sep. 21, 2004 in the corresponding Japanese Patent Application No. 2002-234044.
Fujii Yutaka
Makimae Tatsumi
Shinagawa Hiroshi
Cabrera Zolia
Mazda Motor Corporation
Nixon & Peabody LLP
Studebaker Donald R.
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