Line and weed cutter

Details Line and weed cutter Line and weed cutter

1990-07-11

1991-05-21

Swinehart, Ed

Marine propulsion

Screw propeller

Self-clearing

416146R, 440 49, B63H 516

Patent

active

050171674

ABSTRACT:
Apparatus shears foreign matter such as lines, wires, nets and weeds that can entangle and befoul propellers, propeller shafts, bearings and related structure of propeller-driven, water born vessels. The apparatus shears by cooperative action of a rotating blade that rotates in conjunction with the propeller and a non-rotating blade supported on a non-rotating portion of the vessel. The non-rotating blade moves axially within its support. With each revolution, a slot follower connected to the non-rotating blade engages a slot carried by the rotating blade to adjust the axial position of the non-rotating blade to compensate for axial movement of the rotating blade. A wedge and valley mechanism prevents the two blades being forced apart during shearing action.

REFERENCES:
patent: 4447215 (1984-05-01), Govan
patent: 4507091 (1985-03-01), Govan
patent: 4544363 (1985-10-01), Govan
patent: 4801281 (1989-01-01), Govan

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