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:
Mar. 28, 2017
Filed:
Jul. 27, 2012
Toshiyuki Shimizu, Okazaki, JP;
Masao Kobayashi, Okazaki, JP;
Kenji Nishikawa, Okazaki, JP;
Seiji Otani, Okazaki, JP;
Takaya Nishikawa, Okazaki, JP;
Manabu Takeda, Okazaki, JP;
Toshiyuki Shimizu, Okazaki, JP;
Masao Kobayashi, Okazaki, JP;
Kenji Nishikawa, Okazaki, JP;
Seiji Otani, Okazaki, JP;
Takaya Nishikawa, Okazaki, JP;
Manabu Takeda, Okazaki, JP;
RICOH ELEMEX CORPORATION, Okazaki-Shi, Aichi, JP;
Abstract
The removal starting position (S) of a first removal process and the four removal starting positions (S-S) in a second removal process are established on an imaginary circle (I) with a prescribed radius (R) that is inscribed in the apex (C) of an incomplete thread part (). In each removal process, the tip of the screw thread cutting tool shaves off the apex (C) of the incomplete thread part () into respective recesses, contacting the imaginary inscribed circle (I) from the outside (above). The multiple cutting surfaces of the apex (C) are formed in parallel helices (that is, as mutually adjacent helical recesses) from the starting position to the ending position of the incomplete thread part. Points and burrs in the incomplete thread part can thereby be eliminated or reduced without loss of the ability to screw together with a partner threaded fastener (threaded portion).