Marine propulsion – Oar or paddle – Articulated sectional oar or paddle
Patent
1992-03-02
1993-09-28
Sotelo, Jesus D.
Marine propulsion
Oar or paddle
Articulated sectional oar or paddle
440105, B63H 1604
Patent
active
052482723
ABSTRACT:
A forwards facing rowing apparatus wherein the usual pair of sweep hinges is replaced by a single, common axis, sweep hinge system mounted to and rockable with the oarlock mainframe and wherein a blade feathering mechanism including a coupling device such as a pair of swing gears is employed at the oarset including a handle loom and a blade loom, one of the gears being driven from a rotating handle at the in-board end of the handle loom while the mating gear drives or rotates the blade at the outer end of the blade loom. Each gear may be affixed to a rotatable member such as a torque shaft extending along the handle and blade looms and connected at opposite ends to both the handle and blade, respectively. Alternatively, the handle and blade looms may be rotatable members and one of the pair of gears may be attached to each member. The swing gears are arranged to mesh with one another with the generally vertical tangent line of meshing of the gear pitch circles being aligned with the single common sweep hinge axis, allowing the gears to remain in mesh regardless of the large and rapid changes in sweep angularity occurring between the handle and blade looms and also reversing the rotation of feathering at the blade from that at the handle. A linkage assembly is also provided for synchronizing the motion of the handle and blade looms whereby the blade loom is constrained to move in the same direction as that of said handle loom when the handle loom is rotated about the common sweep axis.
REFERENCES:
patent: 537616 (1895-04-01), Paar
patent: 603398 (1898-05-01), Dalmer
patent: 3729369 (1973-04-01), Trull
patent: 4738643 (1988-04-01), Noggle
Doherty John R.
Sotelo Jesus D.
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