Title: Foldable propellers

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.

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Inventors: Ehrenskjold, Nils Oluf (Kolding, DK)
Munk, Torben (Virum, DK)

Application Number: 487220
Filing Date: 1974-07-10
Publication_date: 1976-09-21
Assignee: Gori-Vaerk A/S (Kolding, DK)
Primary Class(es): 416/142 416/139, 416/140, 416/241A
Other Classes:
US Patent Ref:

725097	Apr, 1903	Learnard	416/131.
866369	Sep, 1907	Learnard	416/142.
938290	Oct, 1909	Thompson	416/142.
1491997	Apr, 1924	Messick	416/131.
1862481	Jun, 1932	Glenwright	416/140.
2404678	Jul, 1946	Wuensch	416/145.
2532371	Dec, 1950	Petersen	416/142.
3038543	Jun, 1962	Davidson	416/241.
3255826	Jun, 1966	Beck	416/142.
3533714	Oct, 1970	Pfleiderer	416/144.
3542487	Nov, 1970	Knuth	416/139.
3709634	Jan, 1973	Lorenz	416/142.

Other Refs: 98,562768,9642,050,42061,987179,2494,73418,344179,249

Nov, 1924	OE
Aug, 1934	FR
Apr, 1972	DT
Feb, 1938	NO
Feb, 1966	AU
, 1911	UK
, 1909	UK
Feb, 1966	SU

Primary Examiner: Powell, Jr., Everette A.
Assistant Examiner:
Attorney: Fleit & Jacobson