Marine propulsion – Screw propeller – With means effecting or facilitating movement of propulsion...
Patent
1994-11-15
1995-11-14
Basinger, Sherman
Marine propulsion
Screw propeller
With means effecting or facilitating movement of propulsion...
114150, B63H 2012
Patent
active
054661781
ABSTRACT:
A load-relieving external steering system for marine outdrive units comprises a first hydraulic steering ram having a piston partially disposed within a housing, wherein the piston is attached to one side of an outdrive unit and the housing is attached to an adjacent portion of a transom. A second hydraulic steering ram has a piston partially disposed within a housing, wherein the piston of the second steering ram is attached to an opposite side of the outdrive unit and the housing of the second steering ram is attached to an adjacent portion of the transom. The first and second steering rams are mounted in a common horizontal plane between the outdrive unit and transom. The housing of each steering ram comprises a front chamber and a rear chamber. A hydraulic pump for providing hydraulic fluid at a constant pressure is connected to the rear chamber of each steering ram. A hydraulic pump and a control valve for providing hydraulic fluid at a variable pressure is connected to the front chamber of each steering ram, wherein the hydraulic pressure at a variable pressure is routed to a particular front chamber to effect the steering of the vessel in a desired direction. At all times the hydraulic fluid at constant pressure routed to each rear chamber imposes a frontwardly directed compression force onto an upper steering bearing to counteract a static and/or dynamic tension load and, thereby enhance the service life of the upper steering bearing.
REFERENCES:
patent: 2939417 (1960-06-01), Hammock, Sr.
patent: 3913517 (1975-10-01), Lohse et al.
patent: 4645463 (1987-02-01), Arneson
patent: 4775342 (1988-10-01), Connor et al.
Inman, Jr. Frederick R.
Inman, Sr. Frederick R.
Basinger Sherman
Inman Marine Corporation
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