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Publication numberUS362934 A
Publication typeGrant
Publication dateMay 17, 1887
Filing dateSep 29, 1880
Publication numberUS 362934 A, US 362934A, US-A-362934, US362934 A, US362934A
InventorsJosiah P. Champion
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Josiah p
US 362934 A
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Description  (OCR text may contain errors)

(No Model.)



.1 0M 1 J v Vim??? Patented May 17,- 1887.


SPECIFICATION forming part of Letters Patent No. 362,934, dated May 17, 1887.

(No model.)

To all whom, it may concern:

Be it known that I, JOSIAH P. CHAMPION, a citizen of the United States, residing at Phelps, in the county of Ontario and State of New York, have invented a certain new and useful Improvement in a Combined Borer and Reamer; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the drawings accompanying this specification.

My invention relates to an improvement in the reamer patented by J abez K. Babcock, August 15, 1882, No. 262,885, of which I am sole owner. That invention consists of a reamer in which a central longitudinal hole extends up into the stock, a circumferential groove extends around the reamer above the cutting edge, with passages communicating with the interior, and a spiral thread extends around the stock above the groove, for purposes therein set forth.

My present invention consists in the combination,with the reamer constructed as above set forth, of a drill forming a borer, which stands in advance of the reamer and centrally therewith, said drill having a shank extending up in the reamer, dividing the central passage through the same, leaving spaces for the passage of the dirt, and secured in place by a pin or other suitabie means, as will be more fully described.

In the drawings, Figure 1 is an elevation of the combined borer and reamer. Fig. 2 is a section in line as m of Fig. 1. Fig. 3 is a similar view at right angles to Fig. 2. Fig. 4 is a bottom end view.

A indicates the stock of the reamer. B is the reamer-head, (l, the central longitudinal passage in the same. 1) is the circumferential groove. E is the hole or holes communicating with the interior, and F is the spiral thread.

This construction is the same as described and shown in the aforementioned patent.

My improvement is as follows: G is a drill forming the borer, the same consisting of a flat bar having a beveled end, as shown. The end of the reamer is slotted on two opposite sides to receive the shoulders of the drill, the shank of which extends up the passage in the reamer and divides it centrally, leaving a clear space on each side. The drill is attached by a pin, a, or othersuitable means. Acombined borer and reamer is thus produced in which dust and chips can pass inward through the sides of the reamer and be deposited without being impeded by the drill, as the central passage of the reamer is unobstructed on both sides. The drill being of nearly the full width of the reamer, only one action is required in boring and smoothing thehole. In large holes the hole may first be bored by a smallerinstrument, and then bored out and reamed by this device.

I do not claim, broadly, a combined borer and reamer.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

The combination,with the reamer provided with head B, central passage, 0, circumferential groove D, holes E, and screwth read F, of the drill consisting of a flat shank with a beveled point, said shank extending up centrally into the passage and secured by a pin, and dividing said passage, in the manner and forthe purpose specified.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.



.Tosnrn Senna, JOHN T. GIFFORD.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2655964 *Feb 16, 1951Oct 20, 1953Labbee Jr Joseph AScrew taper drill attachment
US2918954 *May 27, 1958Dec 29, 1959Harry E MillerDrill
US4274771 *Jun 28, 1979Jun 23, 1981G. N. Tool Inc.Boring reamer with end mill cutters
US4345899 *Nov 3, 1980Aug 24, 1982Vlock D GDental twist drill
US4720218 *May 1, 1987Jan 19, 1988The Boeing CompanyCombination drilling and dressing bit
US6758639Feb 7, 2002Jul 6, 2004Credo Technology CorporationBit for cutting drywall
US8038445 *May 13, 2009Oct 18, 2011Nobel Biocare Services, AgMethods of forming at least one hole in a jaw bone
Cooperative ClassificationY10S408/713, B23B51/108