초록 ▼

A bit extracting tool, used to pull rotatable cutting bits from bit pocket holders. The bit extractor tool comprises two concentric pipe sleeves: an inner tension sleeve with fingers to slide over and hook the rotatable cutting bit's exposed annular ring at the bit end, and a threaded hole at the pu

A bit extracting tool, used to pull rotatable cutting bits from bit pocket holders. The bit extractor tool comprises two concentric pipe sleeves: an inner tension sleeve with fingers to slide over and hook the rotatable cutting bit's exposed annular ring at the bit end, and a threaded hole at the pulling end which receives the tension bolt; a tension bolt which, when tightened, pulls the tension sleeve away from the pocket and pushes on the capped pulling end of the outer compression sleeve; and, a compression sleeve, open on the bit end which pushes on the face of the pocket holder surface, is capped on the pulling end to bear the force of the tension bolt as it pulls the inner sleeve, and locks the finger hooks into the annular bit ring, which tow the bit out of the bit pocket.

대표청구항 ▼

1. A tool assembly for extraction a bit said tool comprising: an outer compression cylinder, a compression cylinder cap, a concentric inner tension cylinder having a plurality of slots and hooks, and a tension bolt which passes through the unthreaded hole of, and bears against, the compression cylin

1. A tool assembly for extraction a bit said tool comprising: an outer compression cylinder, a compression cylinder cap, a concentric inner tension cylinder having a plurality of slots and hooks, and a tension bolt which passes through the unthreaded hole of, and bears against, the compression cylinder cap, and threads into the threaded end of the tension cylinder such that when the tension bolt is tightened, said tension bolt draws the tension cylinder toward the cap of the outer compression cylinder. 2. The tool assembly as set forth in claim 1, wherein the inner tension cylinder is closed with a threaded hole at the pulling end, and the hooks having a finger shape at the bit end, such that the tension cylinder can slide over a seated bullet bit and hook the bullet bit, by the exposed annular ring of said bullet bit, with said finger shape hooks. 3. The tool assembly as set forth in claim 1, wherein the hooks having a finger shape are at the bit end of the tension cylinder are 4″ long and the hooks extend 0.1875″ inward. 4. The tool assembly as set forth in claim 1, wherein the outer compression cylinder is capped with an unthreaded hole in the cap at the pulling end, and open at the bit end such that the compression cylinder can slide over the tension sleeve and seat against the face of the pocket surface around the bit pocket. 5. The tool assembly as set forth in claim 1, wherein the outer compression cylinder bears a small observation hole between 1″ and 3″ from the open bit end to ensure the tension cylinder does not rotate inside the compression cylinder during extraction. 6. The tool assembly as set forth in claim 1, wherein the compression cylinder cap further comprises a thickness. 7. The tool assembly as set forth in claim 1, wherein the tension bolt having a hex head at the pulling end and a tension bolt bearing surface 5″ from the threaded end, bears against the top of compression cylinder cap to transfer the load to the compression cylinder as the tension bolt tightens. 8. The tool assembly as set forth in claim 1, wherein the tension bolt includes a plurality of threaded fasteners with at least one of said fasteners being a head and one acting as a locking bolt. 9. The tool assembly as set forth in claim 1, wherein the compression cylinder bears a non-concentric porthole near the bit end to provide access to the finger hooks of the tension cylinder to prevent internal rotation of the tension cylinder during operation. 10. A tool assembly for extraction a bit said tool comprising: an outer compression cylinder, a compression cylinder cap, a concentric inner tension cylinder having a plurality of slots and hooks, and a tension bolt which passes through the unthreaded hole of, and bears against, the compression cylinder cap, and threads into the threaded end of the tension cylinder such that when the tension bolt is tightened, said tension bolt draws the tension cylinder toward the cap of the outer compression cylinder wherein the tension bolt includes a plurality of threaded fasteners with at least one of said fasteners being a head and one acting as a locking bolt. 11. A tool assembly for extraction a bit said tool comprising: an outer compression cylinder includes a porthole, a compression cylinder cap, a concentric inner tension cylinder having a plurality of slots and hooks, and a tension bolt which passes through the unthreaded hole of, and bears against, the compression cylinder cap, and threads into the threaded end of the tension cylinder such that when the tension bolt is tightened, said tension bolt draws the tension cylinder toward the cap of the outer compression cylinder.