Patent ID: 6837762
Filing Date: 2005-01-04
Classification: B63H,F16F

Abstract:
1. A marine gas cylinder apparatus, comprising: a cylinder block connectable to one of a hull and a propulsion unit, a piston rod insertable into the cylinder block from a rod guide provided in the cylinder block and connectable to the other of the hull and the propulsion unit, a piston rod side oil chamber disposed in a side receiving the piston rod and a piston side oil chamber disposed in a side not receiving the piston rod being provided within the cylinder block, a gas chamber in communication with the piston rod side oil chamber and the piston side oil chamber being integrally formed in the cylinder block, a switching valve apparatus capable of switching a communication state among the piston rod side oil chamber, the piston side oil chamber and the gas chamber provided in the cylinder block, the switching valve apparatus having a check valve provided in a communication passage communicating the piston rod side oil chamber with a communication chamber and opened by pressure of the piston rod side oil chamber, a check valve provided in a communication passage communicating the piston side oil chamber with the communication chamber and opened by pressure of the piston side oil chamber, and a check valve provided in a communication passage communicating the gas chamber with the communication chamber and openable by pressure of the gas chamber, the switching valve apparatus being arranged and constructed to open and close all the check valves at one time, to open all the check valves in accordance with an opening operation, whereby all the communication passages are communicated with each other in the communication chamber, to close all the check valves in accordance with a closing operation, whereby all the communication passages are shut off with respect to the communication chamber, and wherein a relief passage communicating the communication chamber of the switching valve apparatus with the gas chamber is provided, and a temperature compensating relief valve relieving the oil in the communication chamber to the gas chamber is disposed in the relief passage.