Fluid reaction surfaces (i.e. – impellers) – Working member foldable – pivotable or collapsible to non-use...
Patent
1974-07-10
1976-09-21
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Working member foldable, pivotable or collapsible to non-use...
416140, 416139, 416241A, B63H 124
Patent
active
039816133
ABSTRACT:
There is disclosed a propeller adapted for driving a vehicle, such as a boat. The propeller comprises a pair of pivotally mounted propeller blades which are adapted to assume an inactive position wherein the blades are substantially aligned with the direction of vehicle movement, and a working position wherein the blades are at an angle with respect to the direction of vehicle movement. A stop means on the propeller limits the forward pivotal movement of the propeller blades to those locations between the inactive position and a stop position wherein the propeller blades each forms an oblique angle with respect to the inactive position so the propeller blades can each assume a working position which is located on either side of a perpendicular position wherein the propeller blades are perpendicularly disposed to the direction of vehicle movement.
REFERENCES:
patent: 725097 (1903-04-01), Learnard
patent: 866369 (1907-09-01), Learnard
patent: 938290 (1909-10-01), Thompson
patent: 1491997 (1924-04-01), Messick
patent: 1862481 (1932-06-01), Glenwright
patent: 2404678 (1946-07-01), Wuensch
patent: 2532371 (1950-12-01), Petersen
patent: 3038543 (1962-06-01), Davidson
patent: 3255826 (1966-06-01), Beck
patent: 3533714 (1970-10-01), Pfleiderer
patent: 3542487 (1970-11-01), Knuth
patent: 3709634 (1973-01-01), Lorenz
Ehrenskjold Nils Oluf
Munk Torben
Gori-Vaerk A/S
Powell Jr. Everette A.
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