Sleeve and collar system for an oar and method of making same

摘要

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.

主权项

1. A sleeve and collar system for an oar, said system comprising:
a sleeve configured to couple to a shaft portion of the oar, said sleeve comprising an outer surface; and a wear collar configured to couple around said sleeve at each of a plurality of longitudinal positions along said sleeve, said wear collar configured to bear substantially all direct contact from an oarlock during a rowing stroke of the oar, a radially inner surface of said wear collar is shaped to be complementary to at least a portion of said sleeve outer surface, such that said wear collar inner surface and said sleeve outer surface cooperate to maintain said wear collar in a predetermined orientation about a longitudinal axis of said sleeve at each of said plurality of longitudinal positions, wherein said wear collar inner surface is configured to engage said sleeve outer surface in a complementary fit that enables a sliding movement of said wear collar longitudinally along said sleeve.