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:
Oct. 13, 2020
Filed:
Nov. 27, 2015
Mitsubishi Heavy Industries Compressor Corporation, Tokyo, JP;
Yoshiaki Shoji, Hiroshima, JP;
Abstract
A fixing bolt for a stationary member, the bolt extending through and fixing a plurality of stationary members in a multistage centrifugal compressor, includes a head portion, a columnar portion connected to the head portion, and a threaded portion connected to the columnar portion. The columnar portion includes one or more large diameter parts and a plurality of small diameter parts, the one or more large diameter parts each corresponding to a position of an antinode of a primary vibration mode of the fixing bolt for the stationary member, or to the position of the antinode of the primary vibration mode and positions of antinodes of a secondary vibration mode of the fixing bolt for the stationary member, and each of the plurality of small diameter parts having a diameter smaller than each of the large diameter parts.