Power tool

Tool driving or impacting – Processes

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C173S216000, C173S217000

Reexamination Certificate

active

07007762

ABSTRACT:
It is an object of the present invention to provide a technique to increase efficiency of the output torque of the blushless motor to drive a power tool. A representative power tool may comprise a tool bit, a brushless motor to drive the tool bit, a battery to operate the brushless motor and a control device. The control device may operate the brushless motor by means of the battery. The control device may include an advance angle controlling section to control an advance angle of the brushless motor. According to the present teachings, the advance angle of the brushless motor may be determined based upon indexes that reflect working condition of the tool bit when the brushless motor is under the operation. By reflecting the working condition of the tool bit to the determination of the advance angle of the brushless motor, the brushless motor can be operated with higher efficiency under the various working condition such as a hard joint operation and a soft joint operation.

REFERENCES:
patent: 3908130 (1975-09-01), Lafuze
patent: 4072888 (1978-02-01), Bechtle et al.
patent: 4316512 (1982-02-01), Kibblewhite et al.
patent: 4455514 (1984-06-01), Ohno
patent: 4546293 (1985-10-01), Peterson et al.
patent: 4633158 (1986-12-01), Hirata et al.
patent: 4641066 (1987-02-01), Nagata et al.
patent: 4922169 (1990-05-01), Freeman
patent: 5115174 (1992-05-01), Masuda et al.
patent: 5287044 (1994-02-01), Izawa et al.
patent: 5298839 (1994-03-01), Takeda
patent: 5360073 (1994-11-01), Akazawa
patent: 5589746 (1996-12-01), Lewis
patent: 5637968 (1997-06-01), Kainec et al.
patent: 5701065 (1997-12-01), Ishizaki
patent: 5982133 (1999-11-01), Murakami et al.
patent: 6134973 (2000-10-01), Schoeps
patent: 6239567 (2001-05-01), Sunaga et al.
patent: 6424798 (2002-07-01), Kitamine
patent: 6536536 (2003-03-01), Gass et al.
patent: 6538403 (2003-03-01), Gorti et al.
patent: 02-315434 (1992-07-01), None
patent: 09-326479 (1999-06-01), None
patent: 11-132628 (2000-11-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Power tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power tool will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3535548

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.