Hydraulic system in a boat hull, preferably a boat hull having an outboard drive
AssigneeAB Volvo Penta
InventorsBenny Hedlund, Mikael Asberg
Life of this patent
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Abstract
An hydraulic installation in a boat hull for swinging a properller rig pivotably suspended in a shell on a boat transom using a piston-cylinder device arranged in a hydraulic control circuit. A control valve included in the hydraulic circuit for controlling the flow to and from the hydraulic cylinder is sealingly mounted in a through-opening in the shell, so that one side of the valve faces outwardly towards the propeller rig in order to be subjected to water spray during driving and serve as an oil cooler.
Claims8
Hydraulic installation in a boat hull, comprising a hydraulic circuit (37,38,45,46) with pump means (39,41), pressure medium-actuated operating means (20a,20b), control valve means (36) for controlling the flow between the pump means and the pressure-actuated operating means, and cooling means for cooling the pressure medium in the hydraulic circuit, characterized in that the pump means are located inside the hull and that the control valve means comprise at least one control valve (36) with a valve housing, which is so fixed relative to the boat hull, that at least a portion of the valve housing is exposed to the hull surroundings, to thereby serve as cooling means for the pressure medium in the hydraulic circuit.
A boat propeller drive, comprising:
- a shell intended to be permanently mounted against a boat transom;
- a propeller rig which is mounted in the shell for pivoting about a steering axis;
- at least one pressure medium-actuated piston-cylinder device, by means of which the propeller rig is pivotable about the steering axis;
- a control valve for controlling the flow of pressure medium to and from the cylinder of the piston-cylinder device;
- and
- a pump means for pumping the pressure medium mounted inside the boat transom,
- wherein the control valve has a valve housing, which is so carried by the shell, that at least a portion of the valve housing is exposed towards the propeller rig.
Dependencies are inferred from the claim text.