Sleeve and collar system for an oar and method of making same
US9573668B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2015 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Nov 16, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H2016/043
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A sleeve and collar system for an oar includes a sleeve configured to couple to a shaft portion of the oar. The sleeve includes an outer surface. The system also includes a wear collar configured to couple around the sleeve at each of a plurality of longitudinal positions along the sleeve. The wear collar is configured to bear substantially all direct contact from an oarlock during a rowing stroke of the oar. A radially inner surface of the wear collar is shaped to be complementary to at least a portion of the sleeve outer surface, such that the wear collar inner surface and the sleeve outer surface cooperate to maintain the wear collar in a predetermined orientation about a longitudinal axis of the sleeve at each of the plurality of longitudinal positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.