Patent ID: 7934317

Claim:
A pipe cutter having a body having a front end; a rear end; an internal surface; multiple wheels being rotatably mounted in the internal surface of the body near the front end; and an extension tube being formed on and protruding from the rear end of the body and corresponding to the wheels; a mounting sleeve being hollow, being slidably mounted in the extension tube of the body and having a front end extending out of the extension tube and facing to the wheels of the body; a rear end; an inner surface; an outer surface; a bottom; two opposite sidewalls; and two elongated holes being respectively formed through the opposite sidewalls of the mounting sleeve near the front end; a drive segment being mounted in the mounting sleeve and having a blade mount being slidably mounted in the mounting sleeve near the elongated holes and having a drive end extending out of the front end of the mounting sleeve and facing to the wheels of the body; a middle; a connecting end; a mounting recess being axially formed in the middle of the blade mount and communicating with the connecting end of the blade mount; a mounting rod being mounted in the mounting recess of the blade mount and having a rear end extending out of the connecting end of the blade mount; a through hole being transversely formed through the blade mount and communicating with the mounting recess and the elongated holes of the mounting sleeve; a holding pin being mounted in the through hole of the blade mount and having two free ends respectively mounted slidably in the elongated holes of the mounting sleeve; and a blade being rotatably connected to the drive end of the blade mount and facing to the wheels of the body; a linking shaft being slidably mounted in the mounting sleeve and having a front end facing to the connecting end of the blade mount; a rear end; and an inserting chamber being axially formed in the front end of the linking shaft and being mounted around the rear end of the mounting rod; and a spring being mounted around the rear end of the mounting rod and abutting the connecting end of the blade mount and the front end of the linking shaft to provide a damping effect to the blade; and an operating head being rotatably connected to the rear end of the mounting sleeve and being connected to the rear end of the linking shaft of the drive segment.