Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent
1980-06-02
1983-04-12
Mackey, Robert
Tool driving or impacting
Automatic control of power operated means
Tool advance causing or controlling means
81470, 137834, B25B 23145
Patent
active
043794920
ABSTRACT:
The invention relates to a control apparatus for a pneumatic impact wrench driven by an air motor. The pneumatic impact wrench according to the invention comprises a torsion bar, a spindle case, an orifice-shaped rotation suspending valve adapted to narrow or close an exhaust port provided on the torsion bar when the torsion bar is twisted, a pneumatic double-acting main valve adapted to be opened and closed by diaphragms provided intermediately in a passage for supplying compressed air to the air motor, a fluidic element connected to a pilot passage communicating with the control side of the main valve, a conflux pipe and a control valve, the conflux pipe being caused to communicate with one of the control orifices of the fluidic element through a small diameter hole, the other control orifices of the fluidic element being adapted to operate in association with a throttle valve for supplying compressed air to the air motor so as to instantaneously open when the throttle valve opens and closes, thereby communicating with a communication passage leading to the control valve. The torque control apparatus according to the invention is characterized in that two outputs of the fluidic element are caused to communicate with the diaphragms on both sides of the main valve respectively, a second throttle valve being provided in a passage communicating with the input of the fluidic element.
REFERENCES:
patent: 3122165 (1964-02-01), Horton
patent: 3180346 (1965-04-01), Duff
patent: 3238960 (1966-03-01), Hatch, Jr.
patent: 3628774 (1971-12-01), Sudich
patent: 3948328 (1976-04-01), Hiraoka et al.
Mackey Robert
Nippon Pneumatic Manufacturing Co., Ltd.
LandOfFree
Torque control apparatus for pneumatic impact wrench does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Torque control apparatus for pneumatic impact wrench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torque control apparatus for pneumatic impact wrench will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-936308