Title:
船舶推進機用プロペラ緩衝装置
Document Type and Number:
Japanese Patent JP4668745
Kind Code:
B2
Abstract:
A shock absorbing device for a watercraft propeller is provided that can include an outer tube unitarily formed with blades of a propeller. An inner tube can be coupled with a propeller shaft. An intermediate tube can be positioned between the outer tube and the inner tube. A first damping means can be placed between the intermediate tube and the outer tube. A second damping means can be placed between the intermediate tube and the inner tube. One of the damping means can include a rubber damper interposed between the inner tube and the intermediate tube, and an engaging means for limiting an angle range in which the inner tube and the intermediate tube can be rotatable relative to each other to a predetermined angle range. The rubber damper can have a spring constant with which elastic deformation thereof begins at a moment that the propeller shaft initiates its rotation. The other damping means includes a torque limiter (tolerance rings 16) having a circumferential surface that slips against frictional resistance.
Inventors:
Hiroshi Harada
Application Number:
JP2005258934A
Publication Date:
April 13, 2011
Filing Date:
September 07, 2005
Export Citation:
Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA
International Classes:
B63H23/34; B63H20/00
Domestic Patent References:
| JP59171789A | ||||
| JP2000280983A | ||||
| JP9088998A | ||||
| JP57008198U | ||||
| JP8028550A | ||||
| JP60215495A |
Foreign References:
| US3212296 |
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Shigeki Yamakawa