Title: Drill bits for obtaining core samples

Abstract: A drill bit used for obtaining core samples in concrete or rock formations. The drill bit comprises a cylindrical body having a generally annular-shaped cutting surface at one end and at least one waterway including an inner channel on the interior surface of the body extending to the cutting surface and an outer channel on the exterior surface of the body extending to the cutting surface at a point radially spaced from the point where the inner channel extends to the cutting surface. The waterway further includes a recessed portion on the cutting surface connecting the inner and outer channels at the points at which the channels respectively extend to the cutting surface. Such a waterway helps to wash the cutting surface of the bit so that concentration of drill cuttings on the cutting surface is minimized.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: III, William L. (Lenoxville, PA, US)
Acker, Warren T. (Wilton, CT, US)

Application Number: 935357
Filing Date: 1978-08-21
Publication_date: 1980-02-19
Assignee: Acker Drill Company, Inc. (Clarks Summit, PA)
Primary Class(es): 175/405.1 175/402
Other Classes:
US Patent Ref:

2495400	Jan, 1950	William, Jr.	175/330.
2633682	Apr, 1953	Jackson	175/329.
2838284	Jun, 1958	Austin	175/329.
3181632	May, 1965	Raynal	175/329.
3640355	Feb, 1972	Lebourg	175/329.
3692127	Sep, 1972	Hampe et al.	175/330.
3833077	Sep, 1974	Lavallee	175/329.

Other Refs:
Primary Examiner: Leppink, James A.
Assistant Examiner: Favreau, Richard E.
Attorney: LeBlanc, Nolan, SHur & Nies