Patent ID: 7544110
Filing Date: 2009-06-09
Classification: B63H,F16H

Abstract:
1. A marine transmission actuation system, comprising: a housing structure; an actuator movably supported within said housing structure; first, second, third, and fourth cavities disposed at least partially between said actuator and said housing structure; a first surface of said actuator having a first effective area which is responsive to pressure within said first cavity to exert a first force against said actuator in a first direction; a second surface of said actuator having a second effective area which is responsive to pressure within said second cavity to exert a second force against said actuator in a second direction; a third surface of said actuator having a third effective area which is responsive to pressure within said third cavity to exert a third force against said actuator in said first direction; and a fourth surface of said actuator having a fourth effective area which is responsive to pressure within said fourth cavity to exert a fourth force against said actuator in said second direction, said fourth effective area being larger than said first effective area.