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. 23, 2017
Filed:
Sep. 17, 2013
Applicant:
Mayekawa Mfg. Co., Ltd., Tokyo, JP;
Inventors:
Akira Matsui, Tokyo, JP;
Hironori Yamashita, Tokyo, JP;
Assignee:
MAYEKAWA MFG. CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C 18/00 (2006.01); F04C 18/16 (2006.01); F04C 29/00 (2006.01); F04C 18/18 (2006.01); F04C 18/08 (2006.01); F04C 18/20 (2006.01);
U.S. Cl.
CPC ...
F04C 18/18 (2013.01); F04C 18/084 (2013.01); F04C 18/16 (2013.01); F04C 18/20 (2013.01);
Abstract
The objective of the present invention is to reduce a meshing seal line length and further reduce a blowhole area. A compression side blowhole Bis generated in a region surrounded by a male rotor side blowhole contour R, a female rotor side blowhole contour R, and a lower cusp line k. By configuring a female rotor side blowhole contour Rwith a curve including at least two arcs Cand C, an area of the compression side blowhole Bmay be reduced. At a connection point between arcs, by making tangents of the arcs on both sides across the connection point to be the same gradient, the arcs may be smoothly connected.