Lubricating Device for Rotary Drills Page: 4 of 4
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1,138,184
together, and means at the upper end of one
of said members for detachably connecting
the lubricant-holder to a drill stem.
3. A lubricating device for rotary drills
5 comprising a lubricant-holder formed of
two cylindrical-shaped . members arranged
one within the other and spaced away from
each other so as to form an annular cham-
ber for holding a lubricant, a coupling de-
10 vice that serves to hold said member spaced
apart and also connect the lower ends of
said members together, means at the upper
end of one of said members for detachably
connecting the lubricant-holder to a drill
15 stem, a lubricant-pipe in said annular cham-
ber open at its upper end and having its
lower end communicating with a distribut-
ing duct in said couplinig device, and a wa-
ter-pipe in said chamber open at its upper
20 end and having its lower end terminating
above the bottom of the chamber.
4. A rotary drill comprising a stem, a
head provided with cutting devices, a sleeve
or collar of greater diameter than the stem
25 that connects said head and stem together,
said collar being provided with- an annular
chamber for holding a lubricating medium,
a lubricant-pipe in said chamber that com-
municates with distributing ducts which
30 lead to the cutting devices on the head, and
a water pipe projecting part way down into
said chamber and having its upper end ter-
minating in the top wall of said chamber at
a point outside of the drill stem for causing
35 the water that is introduced into the hole
to exert pressure on said lubricating medium
so as to force it through said .lubricating
pipe and distributing ducts.
5. A rotary drill comprising a stem, a
40 head provided with cutting devices, and a
lubricant-holder separate and distinct from
said stem and arranged between said stem
and head, said holder comprising two tubu-
lar-shaped members arranged one within the
45 other and spaced away from each other so
as to form an annular chamber, means on
one of said members for detachably con-
necting the holder to.the drill stem, a cou-
pling interposed between said members forconnecting them together and for securing 50
them to the head, and means for permitting
the wash water that is introduced into the
hole to exert pressure on the lubricating me-
dium in said annular chamber so as to feed
same to the cutting devices on the head. 55
6. A rotary drill comprising a stem, a
head provided with cutting devices, a lubri-
cant-holder arranged between said head and
stem and consisting of two tubular-shaped
members arranged one within the other, a 60
coupling device that secures the lower ends
of said members together and connects the
holder to the head, a threaded portion on
the inner member of the holder that is
screwed into the lower end of the drill stem, 65
an inwardly projecting flange on the upper
end of the outer member of the holder, and
a packing ring in said flange against which
the lower end of the drill stem bears.
7. A rotary drill comprising a stem, a 70
head provided with cutting devices, a lubri-
cant-holder arranged between said head and
stem and consisting of two tubular-shaped
members arranged one within the other, a
coupling device that secures the lower ends 75
of said members together and connects the
holder to the head, a threaded portion on the
inner member of the holder that is screwed
into the lower end of the drill stem, an in-
wardly projecting flange on the upper end 80
of the outer member of the holder, and a
packing ring in said flange against which
the lower end of the drill stem bears, a lubri-
cant-pipe arranged inside of the holder and
being maintained. in position by said cou- 85
pling device, and a water-pipe in said holder
whose upper end is open so- that the water
that is introduced into the hole can flow
downwardly through same and thus exert
pressure on the lubricating medium in the 90
hole.
In testimony whereof I hereunto affix my
.signature in the pressence of two witnesses,
this eleventh day of June 1913.
HOWARD ROBARD HUGHES.
Witnesses:
HYMAN LEVIN,
EARL Lw.
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Hughes, Howard Robard. Lubricating Device for Rotary Drills, patent, April 20, 1915; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth858940/m1/4/: accessed April 23, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.