Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Reexamination Certificate
2005-11-29
2005-11-29
Gerrity, Stephen F. (Department: 3721)
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to torque or speed condition
C173S183000
Reexamination Certificate
active
06968908
ABSTRACT:
Power tool (11) may include a motor and oil pulse unit (22) that generates an elevated torque. Oil pulse unit (22) may be coupled to the motor and have output shaft (18). When load acting on output shaft (18) is less than a predetermined value, rotating torque generated by the motor is directly transmitted to output shaft (18). When the load acting on output shaft (22) exceeds the predetermined value, an elevated torque is generated by oil pulse unit (22) and applied to output shaft (18). Output shaft (18) may be connected to load shaft (12). A socket may be attached to the distal end of load shaft (12). Power tool (11) may further include detecting device (20) for detecting change in rotational angle of output shaft (18) and the direction of rotation thereof, and a control device. The detecting device (20) may output signals corresponding to a state of output shaft (18) to the control device. The control device may store the state of output shaft (18) at predetermined interval. Preferably, the control device may further determine a generating time, at which oil pulse unit (22) generates the elevated torque, based upon the state of output shaft (18).
REFERENCES:
patent: 3590582 (1971-07-01), German et al.
patent: 4305471 (1981-12-01), Eshghy
patent: 4316512 (1982-02-01), Kibblewhite et al.
patent: 4685050 (1987-08-01), Polzer et al.
patent: 5154242 (1992-10-01), Soshin et al.
patent: 5285857 (1994-02-01), Shimada
patent: 5289885 (1994-03-01), Sakoh
patent: 5457866 (1995-10-01), Noda
patent: 5631823 (1997-05-01), Layer et al.
patent: 6311786 (2001-11-01), Giardino et al.
patent: 6371218 (2002-04-01), Amano et al.
patent: 6460629 (2002-10-01), Bookshar et al.
patent: 2002/0175656 (2002-11-01), Matsunaga
patent: 57-201177 (1982-12-01), None
patent: 06-206172 (1994-07-01), None
patent: 08-290368 (1996-11-01), None
patent: 2000-210877 (2000-08-01), None
patent: 2001-277146 (2001-10-01), None
patent: 2001-341079 (2001-12-01), None
patent: 2002-154063 (2002-05-01), None
Ishikawa Goshi
Tokunaga Manabu
Gerrity Stephen F.
Makita Corporation
Nathaniel Chukwurah
Orrick Herrington & Sutcliffe LLP
LandOfFree
Power tools 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 tools, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power tools will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3499339