The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1976
Filed:
Mar. 04, 1975
Toshimitsu Sakai, Toyota, JA;
Isamu Suzuki, Aichi, JA;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JA;
Aisan Kogyo Kabushiki Kaisha, Obu, JA;
Abstract
A control system for a diaphragm vacuum pump comprises a vacuum sensor disposed within the vacuum chamber of a pneumatically operated device for detecting a predetermined vacuum pressure to ensure the effective operation of the device and generating an output signal therefrom. A switchover solenoid valve is disposed within the pneumatic connection between the suction port of the vacuum pump and the vacuum chamber of the device is energized in response to the output signal of the sensor to selectively open the pumping chamber of the pump to the air through the suction port and close the vacuum chamber of the device.