B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
115/23, 115/25
B63H 1/06 (2006.01) B63H 3/04 (2006.01)
Patent
CA 1326173
VARIABLE PITCH PROPELLER BLADES AND DRIVE AND ADJUSTING MECHANISM THEREFOR Abstract of the Disclosure propeller blade having (i) a planar configuration (ii) an inner end portion, (iii) an outer end portion, (iv) a relatively sharp, outwardly swept back leading edge portion, and (v) a cylindrical stub axially aligned with the plane of the blade and affixed to the inner end portion of the blade. Also described is a mechanism that enables the pitch of the blades to be adjusted by the opera- tor through a continuum of positions ranging from fast forward to fast reverse so that the boat can be operated at a full range and variety of speeds, can be stopped rapidly, and can be maneuvered with precision. The mechanism can be used for operating flat-bottom boats ("mud boats") in swamps, shallow water, bayous, lakes, rivers and the like, and pass through wet mud and swampy marshes choked with mud or vegetation without excessively fouling the propellers. The mechanism can be serviced and repaired easily and quickly, and can be employed to operate small craft such as mud boats with a minimum loss of interior boat space.
594212
Macrae & Co.
Morrison Douglas M.
LandOfFree
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