Socket fastener removal tool

摘要

An apparatus for removing a socket fastener is described. The apparatus includes a base, a camshaft, a sleeve and a cartridge. The base includes a base top section and a base bottom section. The camshaft includes lobes that extend from a camshaft top surface to a camshaft bottom surface. The camshaft is fixedly coupled to the base. The cartridge includes a cartridge top surface, a cartridge lip and a plurality of jaws. Each jaw includes a jaw counterclockwise outer cam surface, a jaw counterclockwise inner cam surface, a jaw clockwise outer cam surface, and a jaw clockwise inner cam surface. The cartridge is fixedly coupled to the sleeve and the cartridge interfaces with the camshaft. Additionally, the jaw inner cam surface interfaces with the camshaft cam profiles. The jaws rotate and engage the socket fastener.

主权项

1. An apparatus for removing a fastener having a socket cavity with polygonal drive flats, the apparatus comprising:
a base having a longitudinal axis, the base including,
a base top section having a base top surface,a base bottom section having a polygon shaped opening at a base bottom surface to receive a rotary tool to rotate the base; a camshaft that includes a camshaft top surface and a plurality of lobes, each of which extends from the camshaft top surface to the base top surface; the camshaft being coupled for rotation in unison with the base; each of the lobes of the camshaft having a curved distal surface with a lobe centerline extending from the axis, a curved counterclockwise convex cam surface joining the distal surface on one side of the lobe centerline and a curved clockwise convex cam surface joining the distal surface on an opposite side of the lobe centerline; a plurality of curved concave cam surfaces, each joining the clockwise cam surface of one of the lobes with the counterclockwise cam surface of an adjacent one of the lobes; the distal surface of each of the lobes being farther from the axis than the counterclockwise and clockwise convex cam surfaces and the concave cam surfaces; a rigid sleeve mounted on the base top section so as to allow an increment of rotation of the base relative to the sleeve; a cartridge that includes a plurality of jaws, in which each jaw includes a jaw centerline, a flat jaw counterclockwise outward facing cam surface and a curved jaw counterclockwise inward facing cam surface on one side of the jaw centerline, and a flat jaw clockwise outward facing cam surface and a curved jaw clockwise inward facing cam surface on the opposite side of the jaw centerline, the outward facing cam surfaces joining each other at corner; the cartridge configured to be fixedly coupled to the sleeve for rotation in unison; the camshaft extending through the sleeve and the cartridge with one of the convex cam surfaces of each of the camshaft lobes in engagement with one of the inward facing cam surfaces of one of the jaws; and wherein an increment of rotation of the base and the camshaft relative to the sleeve and the cartridge causes the camshaft to move the jaws outward to and engage the drive flats of the socket cavity, and continued rotation of the base and the cartridge in unison causes rotation of the fastener.