Ships – Steering mechanism – Speed retarders
Patent
1976-01-26
1977-05-31
Blix, Trygve M.
Ships
Steering mechanism
Speed retarders
B63H 2544
Patent
active
040262316
ABSTRACT:
Relates to attachments to a motor boat for reducing the speed of the boat below the idling speed sufficient to permit trolling for fish. The speed controlling device includes a plate member mounted for movement from a vertical position immediately aft of the propeller and across the path of the propeller wash, thereby to slow the speed of the boat, to a second position away from the propeller and out of the path of the propeller wash. Hydraulic mechanism including a piston-cylinder combination unit is connected to a fixed support, such as the propulsion unit of the boat, and to the plate member for moving the latter between the aforesaid two positions of movement. Ports are provided in the cylinder for admitting fluid under pressure to either side of the piston to impart movement of the piston in either direction in the cylinder and to impart corresponding movement to the plate member. A rotary hydraulic pump is driven by a reversible electric motor to provide not only the source of fluid pressure for moving the piston plate member but also the port in the cylinder into which the fluid pressure is introduced for determining the direction of movement of the piston. A three-position electric switch is provided for controlling the operation of the electric motor either in one or the other of its two directions of rotation or for rendering the motor inoperative.
REFERENCES:
patent: 2618121 (1952-11-01), Tucker
patent: 3577948 (1971-05-01), Frey
patent: 3885517 (1975-05-01), Borst et al.
Blix Trygve M.
Sotelo Jesus D.
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