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. 16, 2011
Filed:
Nov. 02, 2006
Nobuo Nakahara, Minato-ku, JP;
Nobuo Nakahara, Minato-ku, JP;
Eagle Industry Co., Ltd., Tokyo, JP;
Abstract
A mechanical sealing device includes a stationary slide ring, a rotary slide ring which rotary slides and closely contacts the stationary slide ring, an O-ring located between an inner bore of the rotary slide ring and the rotary shaft. An annular ring member has a relatively lower gas permeability than that of the O-ring and is provided in the inner bore of the rotary slide ring so as to adjoin the O-ring at an atmosphere side of the sealing device, wherein the following expression D<D<Dis satisfied. Dis a diameter of the rotary shaft, Dis an inner diameter of the annular projected portion of the ring member, and Dis an inner diameter of a portion at the atmosphere side from the ring member in the inner bore of the rotary slide ring.