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. 13, 1980
Filed:
May. 08, 1978
Applicant:
Inventors:
Takao Yamaguchi, Nagoya, JP;
Kenjiro Aoyama, Okazaki, JP;
Yukihiro Nishio, Kariya, JP;
Sadayosi Kazino, Nagoya, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; H01H / ;
U.S. Cl.
CPC ...
335202 ; 200306 ; 335156 ;
Abstract
An electromagnetic switch has a movable contact and a stationary contact accommodated and sealed in a container of a given shape. In the container, there are provided at the axial top and bottom of the container, meander venting paths for communicating the inside of the container with surrounding atmosphere. The ventilation of the inside of the container is thus effectively attained by the meander paths so that the formation of ice on the stationary contact can be prevented.