Patent ID: 6015318
Filing Date: 2000-01-18
Classification: B63H,F02B

Abstract:
A tilt and trim adjustment system for an outboard drive comprising at least one actuator connected to the outboard drive, said actuator including first and second chambers, a pump connected to each of the first and second actuator chambers to supply pressurized working fluid to the actuator chambers, a main valve assembly arranged between the actuator and the pump and selectively placing the pump in communication with at least one of the actuator chambers, a bypass line interconnecting the first and second chambers independent of the main valve assembly, and a bypass valve assembly communicating with the bypass line and with at least the first actuator chamber and being operated between at least three operational states, the bypass valve assembly in a first operational state opening the bypass line to permit fluidic communication between the first and second actuator chambers, the first operational state being established by fluidic pressure supplied by the pump to the first actuator chamber, the bypass valve assembly in a second operational state closing the bypass line to allow working fluid to flow from the first actuator chamber to the pump, said second operational state being established by fluidic pressure supplied by the pump to the second actuator chamber, and the bypass valve assembly in a third operational state inhibiting the flow of working fluid through the bypass valve assembly when the pump is inactive.