Marine transmission actuation system

Marine propulsion – Screw propeller – Having transmission

Reexamination Certificate

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Details

C440S086000, C192S021000

Reexamination Certificate

active

07544110

ABSTRACT:
An actuator for a marine transmission uses four cavities of preselected size in order to provide four potential forces resulting from pressurized hydraulic fluid within those cavities. The effective areas of surfaces acted upon by the hydraulic pressure are selected in order to provide increased force to move the actuator toward a neutral position from either a forward or reverse gear position. Also, the relative magnitudes of these effective areas are also selected to provide a quicker movement into gear than out of gear, given a similar differential magnitude of pressures within the cavities.

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patent: 7291048 (2007-11-01), Phillips et al.
U.S. Appl. No. 11/786,821, filed Apr. 13, 2007, Phillips et al.

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