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:
Jan. 14, 2003
Filed:
Nov. 30, 2001
Hiroki Osumimoto, Shimizu, JP;
Shigekazu Nozawa, Shimizu, JP;
Masayuki Urashin, Shimizu, JP;
Takeshi Hida, Shimizu, JP;
Hirotaka Kameya, Tsuchiura, JP;
Atsushi Watanabe, Chiyoda, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The screw compressor according to the invention is provided with a main casing having male and female rotors , a discharge casing having a discharge passage for compressed gas discharged from the rotors, and an oil reservoir for accumulating oil separated from the compressed gas. The discharge casing is provided with a cylindrical oil separating space section formed therein so as to communicate with the discharge passage, which discharge passage is connected in a tangential direction of the oil separating space section. Further, a discharge port is provided so as to communicate with the oil separating space section, and a cylindrical member is further provided in the oil separating space section so as to be concentric therewith. The oil separating space section and the oil reservoir are connected to each other through a communication passage having a cross-sectional area smaller than that of the oil separating space section.