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:
Sep. 24, 1996
Filed:
May. 31, 1995
Hiroshi Ogino, Hamamatsu, JP;
Sanshin Kogyo Kabushiki Kaisha, Hamamtsu, JP;
Abstract
A simple structured propeller shaft assembly for a counter-rotating propeller system of a watercraft outboard drive prevents fishing line, weeds and like debris from entangling on a shaft of the propeller system and damaging the lubricant seals of the shaft assembly. The shaft assembly includes a nut which threads partially onto an end of an outer propeller shaft of the propeller shaft assembly. A thrust washer, carrier by an inner propeller shaft, includes a front hub which partially inserts into the nut adjacent to the end of the outer shaft. The nut, thrust washer and outer shaft end together define a labyrinth path into the space occupied by the lubricant seals between the inner and outer shafts. This labyrinth path inhibits weeds and like debris from wrapping around the inner shaft at a point adjacent to the lubricant seals.