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. 10, 2010
Filed:
Jul. 06, 2005
Chisami Ishida, Kitakyushu, JP;
Hiroshi Okumura, Kitakyushu, JP;
Hirokazu Takeuchi, Otsu, JP;
Masanori Wada, Otsu, JP;
Chisami Ishida, Kitakyushu, JP;
Hiroshi Okumura, Kitakyushu, JP;
Hirokazu Takeuchi, Otsu, JP;
Masanori Wada, Otsu, JP;
Toto, Ltd., Fukuoka, JP;
Nippon Electric Glass Co., Ltd., Shiga, JP;
Abstract
Provided is a ferrule holding member with a transparent body attached to an inner hole of a sleeve. The transparent body has a primary end face for bringing into contact with an end face of a plug ferrule at a halfway position in an axial direction of the sleeve. The primary end face of the transparent body has a convex curved surface obtained through heat treatment. The convex curved surface is preferably an unpolished surface, and a region with a radius of 75 μm or more, centered around a shaft axis of the sleeve at the convex curved surface, has a convex spherical surface. Alternatively, the transparent body is directly fixed to an inner surface of the sleeve through heat treatment.