Motor driven flaring device

A motor driven flaring device in which a rotatable eccentric cone an apex of which defines a fixed center of rotation is pressed, while rotating, against an end of a pipe to be flared to spread the end of the pipe into a conical shape, comprising:

• a body having a motor incorporated therein and having an output shaft to be connected to a drive source, said body being provided with a female threaded portion;
• a rotational drive shaft which is connected to the output shaft of the motor so as to relatively move in the axial direction thereof, said eccentric cone being rigidly secured to the rotational drive shaft;
• a feed screw shaft member which is connected to the rotational drive shaft and is screw-engaged by the female threaded portion of the body so as to rotate and move in the axial direction thereof;
• a one-direction rotation transmission means between the rotational drive shaft and the feed screw shaft member for transmitting the rotation of the rotational drive shaft to the feed screw shaft member only in one direction;
• and,
• an elastic means between the feed screw shaft member and the rotational drive shaft for continuously biasing the rotational drive shaft in one predetermined axial direction.