Title:
OVERTURN AVOIDANCE DEVICE FOR CATAMARAN
Document Type and Number:
Japanese Patent JPS63242796
Kind Code:
A
Abstract:
The mast (3) of a catamaran (1) is pivotally mounted at (5) on the transverse beam (7) of connection between two hulls (9) and kept in position by two shrouds (15) which, starting from the top (17) of the mast (3) and winding around tensioning pulleys (19) and positioning pulleys (21), are connected to the movable point (12) of a piston device (11). Said piston device is of the oleodynamic-mechanical type: in general, it is constituted by a piston head (37) kept in position in the cylinder (31) by elastic means (33) and in turn constituted by two parts (35), (39) connected to each other by a calibrated helical spring (43); provided outwardly of the cylinder (31) is a pipe (45) with a pump and unidirectional valves (55) and (57) for the oil. When the load on the mast (3) exceeds the value of calibration of the spring (43), the piston head (37) opens to uncover apertures (61) for the passage of the oil which in this manner circulates and permits shifting of the piston head (37) in the cylinder (31). Obviously the mast (3) will only bend if the wind acting on the sail exceeds said calibration or safety value.
Inventors:
BAABARISU MICHIERE
Application Number:
JP17402487A
Publication Date:
October 07, 1988
Filing Date:
July 14, 1987
Export Citation:
Assignee:
BAABARISU MICHIERE
International Classes:
B63B15/02; B63B43/02; B63H9/04; (IPC1-7): B63B15/02; B63B43/02; B63H9/04
Attorney, Agent or Firm:
Nobuyuki Fukuda