Marine propulsion – Screw propeller – With means effecting or facilitating movement of propulsion...
Reexamination Certificate
2005-03-15
2005-03-15
Swinehart, Ed (Department: 3617)
Marine propulsion
Screw propeller
With means effecting or facilitating movement of propulsion...
C440S054000
Reexamination Certificate
active
06866553
ABSTRACT:
A retractable propulsion system for s vessel has an engine (2) mounted within the hull (1; 101) with a drive shaft connected through a universal joint (6) to a propeller shaft (3; 103), supported so that it can rotate and slide in a bearing (7; 105) at a point close to the propeller (4; 104). The bearing (7; 105) is articulated at one end of an extension-retraction mechanism (8, 9; 110, 115, 116, 118) through which the propeller shaft can be placed in a first operating position outside the hull or a second retracted position in a housing (11, 12; 102, 111) in the hull with a door (13, 13′; 15). A device for actuating, guiding and locking this system has a pair of upper arms (118, 118′) and a pair of lower arms (110, 110′) forming an articulated parallelogram (118, 118′; 110, 110′). The device of articulated arms (118, 118′; 10, 110′) is locked in the operating position when the upper arms (118, 118′) are in an over-centering position once the lateral members (121, 121′) have been coupled to fixing members (113, 113′).
REFERENCES:
patent: 2151004 (1939-03-01), Barclay
patent: 5152240 (1992-10-01), Fontanille
Ladas & Parry LLP
Swinehart Ed
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