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:
May. 21, 1985
Filed:
Aug. 30, 1983
Mitsuyoshi Yokota, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A pressure sustaining apparatus which can be used for a braking force magnification apparatus for a vehicle includes a control circuit which energizes a DC motor and a vacuum pump or a compressor associated with the DC motor. When the absolute value of the gauge pressure generated by the pump or compressor reaches a predetermined threshold pressure, a sensor detects this condition and opens its contacts in response thereto. The contacts are connected to the control circuit which electrically energizes the DC motor for a predetermined length of time after the contacts of the sensor are opened. The predetermined length of time is determined by a time constant of a timer circuit included in the control circuit.