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:
Aug. 14, 2001
Filed:
Jul. 09, 1998
Michael J. Dudinetz, Saratoga Springs, NY (US);
Kenneth W. Streifert, Scotia, NY (US);
Ralph F. Hubert, Cohoes, NY (US);
Atlas Copco Aktiebolag, Stockholm, SE;
Abstract
A labyrinth cartridge seal having a shell and a plurality of sleeves having corresponding portions to prevent axial and radial movement therebetween and particularly a labyrinth cartridge seal for use in a compressor for compression of a gas, such as oxygen, which restricts leakage of pressurized gas to a drive mechanism such as an oil lubricated gear box, to thereby reduce the likelihood of explosions. In one embodiment, the labyrinth cartridge seal includes a shell comprising a passageway therethrough, and four spaced-apart, concentrically aligned sleeves, axially and radially supportable along the passageway and generally sealable with the shell to define three separate chambers around the shaft. The shell has three ports, each one opening onto a different one of the three separate chambers for venting or receiving a supply of buffering gas. Also disclosed is a compressor incorporating such a labyrinth cartridge seal.