Patent ID: 8266941

Claim:
A fastener installation tool, comprising: an upper jaw having a first end, a second end opposite the first end, a first side extending between the first and second ends, a second side opposite the first side and extending between the first and second ends, and a head located at the first end and adapted to engage a fastener for securing a plurality of workpieces to one another; a lower jaw having a first end, a second end opposite the first end of the lower jaw, a first side extending between the first and second ends of the lower jaw, a second side opposite the first side of the lower jaw and extending between the first and second ends of the lower jaw, and a head located at the first end of the lower jaw; a first pair of links, each of which includes a first end, a second end opposite the first end thereof, and an intermediate point located between the first and second ends thereof, the first end of one of the first pair of links being fastened to the first end of the lower jaw on the first side thereof, and the intermediate point of the one of the first pair of links being fastened to the second end of the upper jaw on the first side thereof, the first end of the other of the first pair of links being fastened to the first end of the lower jaw on the second side thereof, and the intermediate point of the other of the first pair of links being fastened to the second end of the upper jaw on the second side thereof; a second pair of links, each of which includes a first end and a second end opposite the first end thereof, the first end of one of the second pair of links being fastened to the first end of the upper jaw on the first side thereof and the second end of the one of the second pair of links being fastened to the lower jaw on the first side thereof, the first end of the other of the second pair of links being fastened to the first end of the upper jaw on the second side thereof, and the second end of the other of the second pair of links being fastened to the lower jaw on the second side thereof; and actuating means, attached to the second end of the lower jaw and the second ends of the first pair of links, for actuating the fastener installation tool between a disengaged position, in which the first pair of links and the second pair of links are each in a retracted position and the upper jaw and the lower jaw are juxtaposed with one another, and an engaged position, in which the first pair of links and the second pair of links are each in an extended position and the upper jaw and the lower jaw are spaced apart from one another, the head of the upper jaw being adapted to install the fastener to the plurality of workpieces when the fastener installation tool is in its engaged position.