Power plants – Pressure fluid source and motor – Pneumatic motor with gas supply or removal device
Reexamination Certificate
2006-03-28
2006-03-28
Look, Edward K. (Department: 3745)
Power plants
Pressure fluid source and motor
Pneumatic motor with gas supply or removal device
C060S329000, C060S418000
Reexamination Certificate
active
07017342
ABSTRACT:
An air compressor includes a tank unit storing a compressed air used by a pneumatic tool, a compressed air generator which generates the compressed air and supplies the compressed air to the tank unit, a motor driving the compressed air generator, a drive portion including the motor, a controller portion controlling the drive portion and a pressure sensor detecting an air pressure of the compressed air in the tank unit, in which the controller portion controls a rotation speed of the motor at multiple levels based on a detection signal P1of the pressure sensor, a first differential signal which is a differential value d(P1)/dt of the detection signal P1, and a second differential signal which is a differential value d(P2)/dt of a detection signal P2obtained by removing a pulsatory element from the detection signal P1.
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Iimura Yoshio
Orikasa Hiroaki
Segawa Kazuhiro
Sunaoshi Mitsuhiro
Hitachi Koki Co,. Ltd.
Leslie Michael
Look Edward K.
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