Single-Disk Drill Page: 2 of 5
[1], 4 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATESPATENT OFFICE
HOWARD R. HUGHES, OF HOUSTON. TEXAS.
SINGLE-DISK DRILL.
1,124,243. Specification of Letters Patent. Patented Jan, 5, 1915.
Application filed February 24, 1914. Serial No. 820,670.
To all whom it may concern: ber, not shown, through which water is in-
Be it known that I, HOWARD .R. HUGHES, tf'oduced into the hole so as to flush out tne
a citizen of the United States, residing at disintegrated -material. A single cutter B
Houston, Texas, have invented a certain new of substantially disk-shape, is rotatably go
- and useful Improvement in Single-Disk mounted on the head A in such a manner
Drills, of which the following isa full, clear,. that it crushes and disintegrates the ma-
,and exact description,, such as will enable terial when the head A rotates, the cutter B
others skilled in the art to which it apper-. being arranged in an upright or 'substan'.
tains to make and use the same. tially vertical position at one side of the 65
10 ' This invention relates to rotary. boring head but inclined slightly so that the lower.
drills of the type that are used for- drilling portion of same inclines inwardly toward
deep holes in comparatively soft' formations, the vertical axis of the head and the -upper
such, for example, as gumbo, shale,' hard portion inclines outwardly, as shown in Fig.
clay and soft rock. 1, The cutter B is provided with a com- 70
15 The main object tf my present invention paratively sharp, cutting edge 1 -that shears.
is tp provide an efficient and serviceable ro- off the material from the side of the hole, 'as
tary boring drill.that comprises only a few shown in Fig. 2, when the drill is in opera-.
parts which are so designed -and arranged tion, and said cutter is also preferably pro-
that ample clearance is provided for the dis- vided with a crushing surface 2 that lies 75
20 integrated material that is flushed out of the back of or beyond the cutting edge 1 so as to
hole by the water which is introduced crush and disintegrate the material at the
through the hollow drill stem to which the bottom of the hole that lies outside of the
head of the drill'is connected, thereby re- zone where the sharp edge of the cutter digs
duci.ng the tendency of the disintegrated into the bottom of the hole. Various means 80
25 material to pack in the hole and thus inter- may be employed for connecting the cutter
fere with the operation of the drill. . B to the head, but I prefer. to mount said
Another object is to provide a rotary bor- cutter substantially 'horizontally disposed
ing drill of the type mentioned in which the spindle 3 that incli s downwardly, as
cutting means consists of .a single cutter of shown.in Fig. 1, and which is offset slightly, 85
30 substantially.disk-shape'that cuts a 'circular or set a trifle to one side of the longitudinal
hole without leaving a core standing at the center of the head, as shown .in Fig. 2, so
bottom of the 'hole, said cutter being ar- that the rear side or edge portion of the cut-
ranged in a substantially upright or vertical ter will not drag against the side of the hole,
position at one side.gqf the head so that the which is indicated by the circle x in Fig. 2 90
35 advancing sharp edge of same will shear off when the advancing edge, of the cutter is
the material at the side of the-hole, and the shearing off the material at the side of the
head of the drill on which the .cutter is ro- 'hole. ' The spindle 3 is preferably screwed
tatably mounted being provided with-one or into the head, and is provided at its outer
more. ducts for the flushing water which are end with an enlarged head 3a that laps over 95
40 so disposed that neither the cutter nor other the outer face of the cutter B, but I do not
parts on the head impede 'the flow or dis- 'wish it to be understood that my invention'
charge of the.flushing water from the head. is limited to this specific means for holding
Other objects and desirable features 'of the cutler on the head, for any other suitable
my invention will be hereinafter pointed mounting could be provided for the cutter loo
4 out. without departing from the spirit of my
Figure 1 of the drawings is a vertical see- invention. In view of the great strains
tional view of a' drill constructed in accord-' that the cutter is subjected to when it is in
- 'ance with my 'invention; and Fig. 2 is a top service, it'is desirable -to have an 'exception-
plan view of said drill. ally large bearing area for the cutter, and in 1oS
50 Referring to the drawings which illus- the .embodiment" of my invention, herein
trate the preferred form. of my invention, A shown this is obtained by means of a bushing
designates the head of the drill.which pref- C of bronze or other suitable material that is
erably consists of a block of metal provided mounted on the spindle 3 and which-is pro-
at its upper end with a screw-threaded por- 'avided with a relatively large cylindrical- I
55: tion a for connecting the head' to the hollow shaped bearing portion 4 that surrounds a
drill stem or tubular-shaped operating mem-. 'boss or flange 5 on the head 'A. through
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Hughes, Howard R. Single-Disk Drill, patent, January 5, 1915; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth858022/m1/2/: accessed July 8, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.