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:
Feb. 17, 1987
Filed:
Nov. 19, 1984
Applicant:
Inventors:
Masayuki Aiga, Hyogo, JP;
Tetsuji Hashiguchi, Kasai, JP;
Assignee:
Sanyo Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315 3951 ; 315 3953 ; 315 3965 ; 315 3969 ;
Abstract
The ratio b/a of the width a of the forward end surface 30a of each vane 30 to the interval b between the opposed forward end portions of the respective adjacent vanes 30 is set to be not more than 2.3, whereby distribution density of a high-frequency electric field concentrated in the vicinity of the forward end portions of the vane 30 can be equalized.