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:
Jul. 04, 1978
Filed:
Sep. 09, 1976
Kiyokazu Konishi, Kariya, JP;
Hiroshi Yoshida, Aichi, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A minute pressure control system which combines constant positive pressure and constant negative pressure together to control pressure in a controllable object is disclosed. An electronic control circuit generates a train of pulses modulated in accordance with a preset value. The two constant pressures, either one thereof being switched on and off in response to the pulses, are applied to a surge tank to be combined together therein. The surge tank absorbs pressure pulsation resulting from on-off switching application of the pressure and controls the pressure in the controllable object such as a half-closed chamber to the value preset by the electronic control circuit.