Title:
AIR SOURCE DEVICE
Document Type and Number:
Japanese Patent JPS63134360
Kind Code:
A
Abstract:
PURPOSE:To prevent the burning of a motor due to overloaded operation and prevent waste caused by unnecessary operation by providing a protection circuit for opening a control circuit based on the detection of a discharge pipe pressure. CONSTITUTION:When it is detected by a provided protection circuit 4 that the pressure in a discharge pipe 9 is not lowered below a first set value even when a first prescribed time elapsed from the detection of a pressure regulating upper limit value in a pressure regulator 15, a control circuit 3 is opened separately from opening carried out by the pressure regulator 15. And, even when the pressure regulator 15 closed the control circuit by detecting a pressure regulating lower limit value, the opening is continued to keep a motor 6 stopped and prevent it from burning due to overloading. Also, when it is detected by the protection circuit 4 that the pressure in the discharge pipe 9 does not rise above a second set value even when a second prescribed time elapsed from the time when the pressure regulator 15 detected the pressure regulating lower limit value operating the motor 6, the control circuit 3 is opened to stop the motor 6, thereby, preventing the wasteful operation of the motor 6.
More Like This:
| JPS59126093 | PUMP |
| WO/2001/036755 | CONTROL APPARATUS AND CONTROL METHOD FOR CONSTRUCTION MACHINE |
| WO/1991/005166 | VACUUM PUMPING GROUP |
Inventors:
HACHIMAKI TAKESHI
Application Number:
JP28126786A
Publication Date:
June 06, 1988
Filing Date:
November 25, 1986
Export Citation:
Assignee:
NIPPON AIR BRAKE CO
International Classes:
F04B49/06; B60T17/00; F04B49/00; F04B49/10; H02H7/08; (IPC1-7): B60T17/00; F04B49/02; F04B49/10
Domestic Patent References:
| JPS5849550A | 1983-03-23 | |||
| JPS5131406A | 1976-03-17 |
Attorney, Agent or Firm:
Mitsuhiko Watanabe