US1738382A - Drilling tool and detachable bit - Google Patents

Drilling tool and detachable bit Download PDF

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Publication number
US1738382A
US1738382A US339411A US33941129A US1738382A US 1738382 A US1738382 A US 1738382A US 339411 A US339411 A US 339411A US 33941129 A US33941129 A US 33941129A US 1738382 A US1738382 A US 1738382A
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United States
Prior art keywords
bit
tool
drilling tool
detachable
detachable bit
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US339411A
Inventor
Elzadore S Mccullough
Asa B Smith
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Priority to US339411A priority Critical patent/US1738382A/en
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Publication of US1738382A publication Critical patent/US1738382A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17761—Side detent

Definitions

  • This invention relates to improvements in drills, and 'more particularly. to a combination drill tool and detachable bit.
  • the principal object of this invention is m to provide a combination tool and bit construction wherein the bit may be firmly secured to the tool and yet be capable of quick detachment.
  • Another object of importance is to provide means, whereby the individual cutting elements of a fishtail type bit may be readily replaced.
  • Figure 1 represents a fragmentary side elevation of the improved structure.
  • Fig. 2 is a fragmentary side elevation looking at the structure from a position at iight angles to the structure as appears in Fig. 3 is a fragmentary longitudinal sectional view through the drilling tool with the bit removed.
  • Fig. 4 is an end elevation of the bit holdlng end of the tool.
  • Fig. 5 is a side elevation of one of the bit elements.
  • the drilhng tool or screw 3 is shown abruptly severed transversely in the manner designated by the 40 numeral 4.
  • the present improved structure 1 is in the nature of a fishtail type of drill and is provided with a pair of detachable bit elements 5-'5, in substitution of the usual cutting blades integral to the tool in conventional drills.
  • the transversely severed end of the tool 3, is bifurcated, as at 6.
  • Each furcation is provided with an undercut channel 7, and these channels extend longitudinallyof the tool 3 and are slightly tapered inwardly.
  • Each furcation at the bottom of its groove 7 is portion beveled as denoted by the numeral 10, this end portion of the element being also slightly tapered.
  • Each element is also provided with a recess 11 at a point inwardly from said tapered end portion.
  • the bits are adapted for engagement within the channels in the manner shown in Figs.
  • drilling tool provided with a dove-tail groove in the free end thereot', a cutting bit of spring material provided with beveled edges for engagement within the said dove-tailed groove, said spring bit being provided with a recess, and a boss on the bit ,for engagement within the so saidrecess.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Description

Dec. 3', 1929. E. s. MECULLOUGH ET AL 1,733,332
DRILLING TOOL AND DETACHABLE BIT Filed Feb. 12, 1929 'Inventor Z13 'z /Jimu z/ 154/ B. Swazi/('7 Attorney Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE ELZADORE S. MCCULLOUGH AND ASA B. SMITH, OF FAIRMONT, WEST VIRGINIA I DRILLIKG TOOL AND DETACHABLIE BIT Application filed February 12, 1929. Serial No. 339,411.
This invention relates to improvements in drills, and 'more particularly. to a combination drill tool and detachable bit.
In combination, drilling tools and bits which are detachable, have been employed heretofore with but mediocre success due particularly to insufiicient and impractical means for securing the bit to the tool.
The principal object of this invention is m to providea combination tool and bit construction wherein the bit may be firmly secured to the tool and yet be capable of quick detachment.
Another object of importance, is to provide means, whereby the individual cutting elements of a fishtail type bit may be readily replaced.
Other objects and advantages of the invention will become apparent as the same is better understood from the following description and claim.
In the drawings:
Figure 1 represents a fragmentary side elevation of the improved structure. I
Fig. 2 is a fragmentary side elevation looking at the structure from a position at iight angles to the structure as appears in Fig. 3 is a fragmentary longitudinal sectional view through the drilling tool with the bit removed.
Fig. 4 is an end elevation of the bit holdlng end of the tool.
Fig. 5 is a side elevation of one of the bit elements.
Referrin to. the drawings wherein like numerals esignate like parts, the drilhng tool or screw 3 is shown abruptly severed transversely in the manner designated by the 40 numeral 4. The present improved structure 1 is in the nature of a fishtail type of drill and is provided with a pair of detachable bit elements 5-'5, in substitution of the usual cutting blades integral to the tool in conventional drills.
The transversely severed end of the tool 3, is bifurcated, as at 6. Each furcation is provided with an undercut channel 7, and these channels extend longitudinallyof the tool 3 and are slightly tapered inwardly. Each furcation at the bottom of its groove 7 is portion beveled as denoted by the numeral 10, this end portion of the element being also slightly tapered. Each element is also provided with a recess 11 at a point inwardly from said tapered end portion.
The bits are adapted for engagement within the channels in the manner shown in Figs.
1 and 2. The bosses 8 spring into the recess 11 to firmly retain the bit in wedged connection to the tool.
Obviously, in the construction of the novel structure. certain changes may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.
Having thus described our invention, what we claim as new is In combination, drilling tool provided with a dove-tail groove in the free end thereot', a cutting bit of spring material provided with beveled edges for engagement within the said dove-tailed groove, said spring bit being provided with a recess, and a boss on the bit ,for engagement within the so saidrecess.
In testimony whereof we afiix our signatures. a.
ELZADORE S. MGCULLOUGH.
ASA B. SMITH. s5
US339411A 1929-02-12 1929-02-12 Drilling tool and detachable bit Expired - Lifetime US1738382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US339411A US1738382A (en) 1929-02-12 1929-02-12 Drilling tool and detachable bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US339411A US1738382A (en) 1929-02-12 1929-02-12 Drilling tool and detachable bit

Publications (1)

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US1738382A true US1738382A (en) 1929-12-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510751A (en) * 1944-04-08 1950-06-06 Mclaughlin Joseph Auger bit head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510751A (en) * 1944-04-08 1950-06-06 Mclaughlin Joseph Auger bit head

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