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:
Dec. 08, 1987
Filed:
Dec. 19, 1986
Yukio Nakamura, Tengachayakita, Nishinari-Ku, Osaka-Shi, Osaka-Fu, JP;
Other;
Abstract
A method of producing propeller shafts for jet-propelled small-sized boats comprises the steps of preparing a main shaft in the form of a hollow round bar, which is a finished part and a pair of auxiliary shafts shorter in length than the main shaft, in the form of solid round bars, which are roughly shaped parts, connecting and integrating the pair of auxiliary shafts with the opposite cut ends of the main shaft by the friction welding process utilizing heat of friction produced by relative pressurized rubbing movement between the parts, and, with the main shaft, which is a finished part, used as a standard, machining the surfaces of the auxiliary shafts, which are roughly shaped parts, to form mount surfaces for fitting thereon such parts as oils seals, bearings, and a propeller.