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:
Nov. 11, 2025
Filed:
Jan. 20, 2022
Hitachi Global Air Power Us, Llc, Michigan City, IN (US);
Jonathan D. Batdorff, Fort Wayne, IN (US);
Hideki Fujimoto, Shizuoka, JP;
Edward Noble, Chesterton, IN (US);
HITACHI GLOBAL AIR POWER US, LLC, Michigan City, IN (US);
Abstract
A screw compressor and a variable capacity bypass valve therefor are provided. The variable capacity bypass valve includes a bore formed in a rotor bore discharge face of the compressor housing upstream of a compression chamber outlet end of the compression chamber, a slide valve member inserted into the bore to fill a cavity, the valve member having a sealing surface configured to interact with a thread of a compressor screw during operation of the screw compressor, an actuator structure coupled to the valve member and oriented to move the valve member radially along the bore to open a fluid pathway communicatively coupling the compressor chamber to a bypass chamber configured to return compressed fluid to a fluid inlet of the compression chamber.