Rivet setting tool

A rivet setting tool for setting a rivet having a mandrel, comprising:

• a. a lower handle having an input port and having a hollow head at one end,
• b. an upper handle having one end lying in the hollow head and being connected thereto for pivotal movement about a first transverse pin,
• c. a support arm is provided and lies within the hollow head and is connected thereto for pivotal movement about a second transverse pin substantially spaced from the first pin lengthwise of the lower handle,
• d. a gripper is mounted on the support arm for pivotal movement about a third transverse pin, the support arm and the gripper forming a grasping means, operated by movement of the upper handle to cause the mandrel to move along a path passing through the input port, the gripper, and an exit port in the direction from the gripper opposite that of the input port,
• e. a first spring means is provided and biases the upper handle and the support arm,
• f. a second spring means is provided and biases the gripper and the support arm,
• g. a fourth pivot pin extending between the upper handle and the support arm is provided so that, as the upper and lower arms are brought together by pivotal movement about the first pin, the fourth pin causes pivotal movement of the support arm with the gripper about the second pin, and
• h. a pressure pad which intersects the path to limit the movement of the mandrel along the path and which can be pressed by the user's hand to press the anvil against the work, a pair of flanges extending from the pressure pad and embrace the said head of the lower handle and are held in place by the said first transverse pin.