Power-operated spreader tool

A spreader tool comprising:

• a housing including a fluid cylinder;
• a pair of arms pivotably mounted at one end to said housing and formed with jaws at the opposite end;
• a piston in said fluid chamber and including a stem carrying a piston head displaceable axially between said arms;
• and a spring urging said pair of arms towards each other to close said jaws;
• one of said arms including a rib extending along its longitudinal axis, and the other of said arms including two ribs extending laterally on opposite sides of its longitudinal axis and defining a space between said two ribs for accommodating a part of said one rib in the fully closed position of the jaws, said ribs defining track surfaces engageable by the piston head during its axial displacement between the arms for spreading apart the jaws.

A spreader tool comprising;

• a housing including a fluid cylinder;
• a pair of arms pivotably mounted at one end to said housing and formed with jaws at the opposite end;
• a piston in said fluid chamber and including a stem carrying a piston head displaceable axially between said arms and engageable with the inner confronting faces thereof for spreading apart said jaws when the piston head is movable towards said jaws;
• and a spring urging said pair of arms towards each other to close said jaws;
• said piston head being of cylindrical configuration and mounted to the piston stem so as to be rotatable about the longitudinal axis of the piston stem, thereby permitting the piston head to accommodate itself with respect to any uneveness in the inner confronting surfaces of said arms.