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:
Aug. 23, 1977
Filed:
May. 21, 1976
Toyota Jidosha Kogyo Kabushiki Kaisha, Tokyo, JA;
Abstract
A negative pressure generating system for an internal combustion engine powered vehicle, comprising a brake booster incorporated in the vehicle and adapted for an increase in braking power, an air cleaner for cleaning air to be supplied to the internal combustion engine, an air pump which receives air from said air cleaner and delivers the air to said internal combustion engine, and a valve disposed among said brake booster, said air cleaner and said air pump and operative in response to the booster pressure in said brake booster on receiving said pressure as an input signal, thereby interrupting air communication between said air pump and said air cleaner, with the result that the negative pressure arising on the suction side of said air pump is used as a negative pressure source for operating said brake booster.