Invention Grant
- Patent Title: Marine propulsion device
- Patent Title (中): 船用推进装置
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Application No.: US13891215Application Date: 2013-05-10
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Publication No.: US08985084B2Publication Date: 2015-03-24
- Inventor: Makoto Kuroiwa , Isamu Naruse , Satoshi Miyazaki , Hirokazu Kaneko
- Applicant: Yamaha Hatsudoki Kabushiki Kaisha
- Applicant Address: JP Shizuoka
- Assignee: Yamaha Hatsudoki Kabushiki Kaisha
- Current Assignee: Yamaha Hatsudoki Kabushiki Kaisha
- Current Assignee Address: JP Shizuoka
- Agency: Keating & Bennett, LLP
- Priority: JP2012-275667 20121218
- Main IPC: F02B61/04
- IPC: F02B61/04
Abstract:
A crankshaft includes a coupling portion, a first functional portion, and a second functional portion. The coupling portion is coupled to a connecting rod. The first functional portion is provided on an upper portion of the crankshaft protruding from a crankcase. The first functional portion drives a first functional component. The second functional portion is provided on a lower portion of the crankshaft protruding from the crankcase. The second functional portion drives a second functional component. The entire crankshaft has been processed by a first treatment to at least enhance the corrosion resistance thereof. At least a coupling portion of the crankshaft has been processed by a second treatment to at least enhance the strength thereof. Neither of the first functional portion and the second functional portion has been processed by the second treatment.
Public/Granted literature
- US20140165934A1 MARINE PROPULSION DEVICE Public/Granted day:2014-06-19
Information query
