Metal working – Method of mechanical manufacture – With testing or indicating
Reexamination Certificate
2011-06-14
2011-06-14
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
With testing or indicating
C073S001120, C073S862230
Reexamination Certificate
active
07958611
ABSTRACT:
A number of pre-production calibration tightenings are performed at a screw joint identical to a screw joint used in production and using the same impulse wrench as to be used in production tightening. The value of one or more tightening related parameters are registered at the attainment of the desired pre-tension level, and those parameter values are used to statistically form a basis for a reference set-up. The tightening parameter values registered during production tightening are compared to the reference set-up, and an indication is obtained as to discrepancies between the reference set-up and the actually registered parameter values to get an indication as to whether the impulse wrench is malfunctioning and/or the screw joint is faulty.
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Friberg John Robert Christian
Holmin Mats Cornelius
Karlberg Nils Gustav Erland
Karlberg, legal representative Christa Maria
Schoeps Knut Christian
Atlas Copco Tools AB
Bryant David P
Holtz Holtz Goodman & Chick PC
Koehler Christopher M
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