Patent ID: 11872677
Assignee: GOODRICH CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A device for extracting a deeply embedded helical coil, the device comprising:
a shaft, the shaft comprising a proximal end and a distal end; and
a blade, the blade comprising a first portion and second portion,
wherein the first portion of the blade is rectangular in shape and is configured to be inserted into and retained within a slot in the distal end of the shaft,
wherein the second portion of the blade has an approximate diameter-to-length ratio of 5:12 with reference to a diameter of a hole into which the second portion of the blade is to be inserted and a length of the second portion of the blade,
wherein the second portion of the blade has an approximate thickness-to-diameter ratio of 1:5 with reference to a thickness of the blade and the diameter of the hole into which the second portion of the blade is to be inserted, and
wherein the second portion of the blade is tapered at an angle such that a first width of the second portion of the blade tapers to a second width, wherein the second width is less than the first width, and wherein the second width has an approximate width-to-diameter ratio of 4:5 with reference to the second width of the blade and the diameter of the hole into which the second portion of the blade is to be inserted.