Hydraulic power arrangement for mechanical davits

Claim 1

A HYDRAULICALLY POWERED MECHANICAL BOOM DAVIT HAVING A DECK SUPPORT STRUCTURE INCLUDING INVERTED HIGH AND LOW INBOARD AND OUTBOARD LONGITUDINAL U CROSS SECTION BEAM MEMBERS TO GIVE A HORIZONTAL BASE, A TRIANGULAR BEAM STRUCTURE HAVING A HORIZONTAL TRANSVERSELY EXTENDING BASE MEMBER SUPPORTED AT ITS ENDS UPON SAID BEAM MEMBERS IN HORIZONTAL POSITION ABOVE THE DECK, A VERTICAL INBOARD UPWARDLY EXTENDING LEG AND A HYPOTENUSE MEMBER EXTENDING OBLIQUELY OUTWARDLY AND DOWNWARDLY FROM THE UPPER END OF THE VERTICAL LEG TO THE OUTER END OF THE TRANSVERSELY EXTENDING BASE MEMBER, A LOWER END HYDRAULIC CYLINDER PIVOT MOUNT ON THE UPPER END OF THE VERTICAL INBOARD LEG, A HYDRAULIC CYLINDER HAVING A PISTON PIVOTALLY MOUNTED AT ITS LOWER END ON SAID PIVOT MOUNT, SPACED BOOM DAVIT PIVOT MOUNTS ON EACH SIDE OF SAID HORIZONTAL BASE MEMBER AND ON THE TOP SIDES OF THE ENDS OF THE OUTBOARD U-CROSS SECTION BEAM MEMBER, OBLIQUELY UPWARDLY AND INWARDLY EXTENDING BOOM PIVOT AND BRACE MEMBERS EXTENDING FROM THE DAVIT PIVOT MOUNTS TO A BOOM CARRIED BY SAID BRACE MEMBERS INTERMEDIATE ITS SIDES AND EXTENDING DOWNWARDLY TO MIDWAY BETWEEN SAID SPACED PIVOT MOUNTS AND PIVOTED THEREON AND UPWARDLY TO SUBSTANTIALLY BEYOND THE UPPER END OF SAID HYDRAULIC CYLINDER, A PISTON DRIVEN CONNECTING ROD EXTENDING FROM THE UPPER END OF THE HYDRAULIC CYLINDER TO THE UPPER PORTION OF THE BOOM BELOW THE UPPER END THEREOF AND MEANS TO LIMIT THE OUTBOARD MOVEMENT OF THE BOOM.