Abstract: An arm driving device for a fluid loading apparatus is disclosed, which comprises a V link comprised of a first link arm and a second link arm connected together rotatably at one end thereof and a hydraulic cylinder having a cylinder rod the top of which is rotatably connected to a suitable portion of either of the link arms, the other end of the first link arm being connected rotatably to a suitable portion of an extension member of an inboard arm of the fluid loading apparatus and the other end of the second link arm being connected rotatable to a suitable member fixedly connected to a stand pipe installed on land. The arm driving device may be applied to operate the outboard arm of the fluid loading apparatus with respect to the inboard arm.

Abstract: A fluid loading device for marine application in the form of a fixed, vertical, hollow supporting member fluid connected to a transfer pipe, has mounted thereto one end of an inner hollow arm through a bi-directional swivel joint, allowing the inner hollow arm to rotate freely about vertical and horizontal axes. An outer hollow arm is rotatably mounted for rotation vertically by means of a hollow swivel joint to the outer end of the inner hollow arm about a horizontal axis and carries at its outboard end a swivel joint for rotation vertically and horizontally. Polygonal cam plates which rotate in response to rotation of the outer arm are mounted on the inner and outer ends of the inner hollow arm and rotate with the outer hollow arm and a balancing counterweight, respectively. The cam plates rotate in unison through a loop created by an endless array of end to end linked rods which have an individual length equal to 1/n times the length of one side of the polygonal cam plate, with n being an integer.