Patent ID: 7216409

Claim:
A gear puller comprising a screw shaft having a proximal end; a distal end; an external surface; an outer thread formed on the external surface of the screw shaft; a hexagonal head formed on the proximal end; and a tip formed on the distal end of the screw shaft; a connecting seat connected rotatably to the screw shaft and having a body having a top; a bottom; a center; and a through hole formed in the center of the body; a threaded stub mounted on the top of the body, being hollow and having an internal surface; a central hole axially defined through threaded stub and communicated with the through hole in the body an external surface and having an internal surface; an outer thread formed on the external surface; and an inner thread formed on the internal surface of the central hole and screwed with the outer thread of the screw shaft; and multiple arms formed on and radially extending from the body and each having a proximal end connected with the body; a distal end; two hangers formed on and parallelly extending from the distal end of the arm and each having a top; and a groove defined in the top of the hanger; and a gap defined between the hangers; multiple paws pivotally mounted one the connecting seat and each having a pivot end; an action end; a pivotal axle mounted on and laterally extending from the pivot end of the paw and pivotally held inside the grooves of the hangers in one of the arms; and a hook formed on the action end of the paw; and a fixed element mounted around the threaded stub on the connecting seat and the screw shaft and having a fixed board having a central body comprising a top; a bottom; and a center; a fixed hole formed in the center of the central body and held the threaded stub; and multiple sheathings radially extending from the central body and contacting the arms on the connecting seat and being U-shaped; a nut screwed onto the threaded stub and having an internal surface; and an inner thread formed on the internal surface and screwed with the outer thread of the threaded stub; and a spring mounted and compressed between the fixed board and the nut to push against the fixed board.