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:
Jun. 19, 1979
Filed:
Sep. 26, 1977
Applicant:
Inventors:
Assignees:
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Aisan Industry Co., Ltd., Obu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60276 ; 60290 ;
Abstract
An electromagnetic type vacuum switching valve adapted for connecting a vacuum actuator of an exhaust gas cleaning apparatus to a vacuum signal port in an intake manifold of an internal combustion engine or to the atmosphere. The valve is provided therein with an orifice means for controlling the rate of introducing the vacuum signal or the rate of introducing the atmospheric air pressure signal, and with a filter means for preventing dust in the atmosphere from entering into the engine.