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Патент USA US2125133

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July 26, 1938. ‘
. E. F.' TERRY
i
2,125,133
CLEANSING DEVICE‘ 'f'ok‘ ROCK‘ DRILLS
1 '
Filed April‘ 10. ‘1936 '
55'.
<77
“
INVENTOR '
BYW
’
H as ATTORNEY.
2,125,133
Patented July 26, 1938
UNITED STATES PATENT OFFICE
2,125,133
CLEANSING DEVICE FOR ROCK DRILLS
Edward F. T‘erry; Phillipsburg, N. J., assignor to
IngerSoll-Rand Company, Jersey City, N. J., a
corporation of New Jersey
'
Application April 10, 1936, Serial No. 73,674
1 Claim. (01. 121-10)
This invention relates to cleansing devices, but
ing its rearward stroke for rotating the working
more particularly to a device for supplying cleans
implement.
ing liquid directly to the working implement of
In accordance with the practice of the inven
tion the chuck mechanism guiding the Working
implement 29 comprises a sleeve 39 having a bore
40 to receive the shank of the working implement.
In the front end of the sleeve 39 are threads 4|
to engage threads 42 on the working implement
for securing the two securely together. The
rearward portion of the bore 49 is in body en 10
gagement with the adjacent portion of the work
ing implement and, as a preferred form of con
struction, the sleeve 39 is provided with an en
larged recess 43 having ‘threads 44 for engage
ment with threads 45 of a plug 46. The plug 15'
preferably seats upon the bottom of the recess
43 and has a beveled surface 41 that cooperates
a ?uid actuated rock drill.
One object of the invention is to assure an
adequate supply of cleansing liquid to a drill hole
to flush the cuttings from the Working surface.
Another object is to prevent the passage of
pressure fluid from the rock drill into the drill
10 hole.
Other objects will be in part obvious and
in part pointed out hereinafter.
In the accompanying drawing forming a part
of this speci?cation and in which similar refer
15 ence numerals refer to similar parts,
Figure 1 is a sectional elevation of so much of
a rock drill as will serve to illustrate the inven
tion and a practical application thereof, and
Figure 2 is a transverse view taken through
20 Figure 1 on the line 2-2.
Referring more particularly to the drawing,
the rock drill embodying the invention and desig
nated in its entirety by 20, comprises a cylinder
2!, a front head 22 and a hollow spacer 23 inter
posed between the cylinder and the front head.
These elements constitute casing parts of the
rock drill and may be held securely in the cor
rect assembled relationship with respect to each
other by side rods 24 disposed on opposite sides
30 of the rock drill.
The spacer 23 has an annular extension 25 that
extends into the front head 22 to centralize these
elements with respect to each other and is cen
_ tralized with respect to the cylinder by a front
cylinder washer 25 extending into the contigu
ous ends of the cylinder and the spacer. A ?ange
2‘! on the periphery of the front cylinder washer
acts as a seat for the ends of the cylinder and
the spacer.
4.0
The cylinder 29 contains a hammer piston 28
for actuating a working implement 29 extending
into the front head 22. The piston 28 has a stem
30 which is guided by the front cylinder washer
26 and has longitudinally extending ?utes 3| to
receive and interlock slidably with ribs 32 in a
sleeve 33 rotatable in the spacer 23.
In the rear end of the cylinder 2| is arranged
rotation mechanism of well known type com
prising a ri?e bar 34 which interlockingly en;
gages the piston 28. The ri?e bar has a head 35
and pawls 36 in the head 35 cooperate with the
teeth 31 of a ratchet ring 38 for holding the ri?e
bar against rotary movement and thus cause
55 the piston 28 to describe a partial revolution dur
1
with a corresponding surface 48 on the end of I
the working implement 29 to effect a seal at
that point.
..
20v
The plug 46 carries a stem 49 which extends
into the sleeve 33 and has ?utes 5D to receive
the ribs 32 on the sleeve 33. The stem 49 is
imperforate and projects into the path of the
stem 30 to receive the blows of the piston and 25
transmit them to the working implement 29.
In order that pressure ?uid ?owing along the
stem 30 of the piston toward the front end of
the drill may be prevented from entering the
chuck mechanism the sleeve 33 is provided with 30
an aperture 5|, preferably adjacent the free end
of the stem 49. The aperture 5| opens into an
annular groove 52 in the periphery of the sleeve
33, and a vent 53 in the spacer 23 affords com
munication between the groove 52 and the at
35
mosphere.
Within the front head 22, and encircling the
sleeve 39, is an annular chamber 54 into which
cleansing ?uid is constantly delivered by a con
duit 55 connected to the front head. The ends
of the chamber 54 are sealed by packing members
56 which are pressed into sealing engagement
with the periphery of the sleeve 39 by a spring 51
interposed between the packing members.
In the periphery of the sleeve 39 is an annular 45
groove 58 which, when the chuck mechanism and
the working implement are in their rearmost
limiting positions to receive the blows of the ham
mer piston 28, registers with the chamber 54, and
from the annular groove 58 lead passages 59 which
open into the front end of the recess 43. The
block 49 is likewise provided with a series of
passages 60 and. an axial passage 6| communicat
ing with the passages 60 and with a passage 62 in
the working implement 29.
55
2
2,125,133
Preferably, the annular groove 58 is so posi~
tioned that it opens into the chamber 54 near
the front end of said chamber when the chuck
member 56. In this way the groove 58 will be
moved out of communication with the chamber
54 and no cleansing ?uid will, therefore, ?ow to
mechanism lies in its rearmost limiting position.
the ‘drill hole. Whenever it is again desired to
The chuck mechanism is slidable within the front
head and capable of a considerable degree of lon
resume drilling the percussive element of the rock
drill is set in operation and the working imple
ment pressed against the work to move the chuck
mechanism rearwardly in the front head. The
passages in the working implement and the chuck
mechanism will then again be communicated with 1O
the source of liquid supply and without necessi
tating the manipulation of valve means exteriorly
of the rock drill, as is customary.
I claim:
gitudinal movement therein.
Thus, when the
rock drill is inoperative, the chuck mechanism
may be moved forwardly to move the groove 58
out of communication with the chamber 54 and
thereby cut off communication between the pas~
sage 62 in the working implement and the source
of cleansing liquid supply.
During the normal operation of the drill and
when the working implement is pressed against
the Work the chuck mechanism lies in its rear
most limiting position so that the annular groove
58 will be in full communication with the cham
ber 54. In this position of the parts cleansing
?uid flows from the chamber 54 through the
groove 58 and the passages 59, 60, BI and 62 into
the hole being drilled and ?ushes the cuttings to
the surface of the ground. Cleansing ?uid con
tinues to flow through these channels as long as
25 the chuck mechanism remains retracted so that
In a rock drill, the combination of a casing and
a working implement extending thereinto and
having a passage for cleansing fluid, a hammer
piston for actuating the working implement, a
hollow rotary member in the casing having in
ternal ribs in engagement with the piston, a ,,
sleeve slidable in the casing and being threaded
ly connected to the working implement, means
threaded into the sleeve and seating against the
end of the working implement for transmitting
the blows of the hammer piston to the working 25
the stem 49 is in position to receive the blows of implement, an imperforate stem on said means
the hammer piston 28. In the event, however, having ?utes to receive the ribs on the rotary
that the drilling operation is interrupted, as member, and a supply passage in the sleeve and
when changing working implements, the chuck the said means for conveying cleansing fluid to
30 mechanismis drawn forwardly in the front head, the passage in the working implement.
80
preferably to a position in which the annular
groove 58 lies forwardly of the front packing
EDWARD F. TERRY.
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