close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2129509

код для вставки
Patented Sept». 6, 1938
UNITED smrss PATEN'E
FFMIE
2,129,509
ROCK DRILLv HOOD
Lester C. Smith, West Hartford, Conn., assigner
to The Spencer Turbine Company, Hartford,
Conn., a corporation of Connecticut-
Application June 13, 1938, Serial No. 213,408
4 Claims. (Cl. Z55-50)
My invention relates to that class of devices
which are employed for disposing of the dust
created by rock drilling operations, and an object
of my invention, among others, is the production
5 of a rock drill hood that may be readily placed
in position and as readily removed therefrom
without displacing the drill from the hole into
which it extends; and a further object of the
invention is to provide means for retaining the
10 hood in position; and a still further object is to
provide a hood that, while possessing the con
veniences mentioned, shall be so constructed as
to effectually permit removal and dispose of the
dust in a most satisfactory manner.
One form of a drill hood embodying my in
15
vention and in the construction and use of which
the objects herein set out, as Well as others, may
be attained is illustrated in the accompanying
drawing in which
Figure 1 is a top plan view of my improved drill
hood.
Figure 2 is a view in central vertical section
through the same.
`
Figure 3 is an isometric perspective view.
In operations embodying drilling of rock it
is not only desirable, but the law requires that
means shall be employed for removing the dust
and thereby prevent its> inhalation by operators,
this in order to prevent disease resulting from
30 the introduction of such dust to the lungs by
breathing. It is also desirable that the hood
may be placed in position with little incon
venience and as readily removed without disturb
ing the drill and that the hood shall also be se
curely retained in position. My improved drill
hood, illustrated and described herein, possesses
these qualifications and comprises a case 5 com
posed of any suitable material, preferably par
tially circular in form and having a bottom 6,
a top l, and a side wall 8.
The side wall has an
opening 9 through what I term the rear side of
the case and from which a nipple IU extends to
receive a conducting tube Il to convey away
the dust which enters the chamber in the case
from the operation of a drill l2 in a hole I3 in
rock i4, as shown in Fig. 2 of the drawing. ‘The
bottom 6 has an opening l5 to receive a drill,
and a slot i6 extends from said opening out at
the fro-nt of the case. The top 1 also has a slot
Il located vertically above the slot i6 and open
ing I5 and registering therewith.
The front of
' the case is preferably squared off, as shown at
i9, and a slot 2@ is formed through this front
wall of a width substantially that of the slots I6
55 and Il. These slots are each of a width slightly
greater than the diameter of the shank I3 of the
drill so that the case may be freely slid into place
with the drill in the hole I3 and as readily re
moved, said slots, however, not being open enough
to prevent free ilow of air currents from within
the case out through the opening 9, but being
large enough to enhance such flow.
In order to aid in obtaining this result in the
flow of air> currents a partition` 2| is extended
downwardly from the top 'l to such distance as 10
will secure the most effective results, in the struc
ture shown herein such partition extending down..
ward nearly half` way to the bottom. This par
tition is of U-shape, of a width substantially
that of the slots i6 and il, the bend 22 in the
partition terminating the slot formed by the side
'walls 2l of such partition.
As an effective means for retaining the case in
position and preventing its displacement from
vibration created by operation of a drill, Ipro
vide a retaining clip 23 formed of spring metal
and having retaining bends 24 converging toward
the front of the clip and with divergent prongs
25 to form a guide opening for reception of the » 25
drill shank, as shown in'F’ig. l. A cleat 26 se
cured to the top 'l is used to clamp the clip in.
place, and a stop 2l’ may be provided to prevent
any backward mo-vement of the clip on the case
should the cleat become loose to any extent.
30
The operation of the hood will be readily un- v
derstood from the foregoing description taken in
connection with the drawing, it being observed
that it is frequently desirable to position the
hood and to remove it without displacing the 35
drill, and this may be readily done by sliding
the hood into place, the drill shank passing along
the slots in the top and bottom and partition,
into theV opening between the prongs 25, and into
the enlarged space between the arms of the clip. 40
These slots also possess the advantage of en
abling the operator to closely observe the action
of the drill, which is important, particularly in
dimensional stone cutting or in the extraction of
stone for building or monumental purposes, the
drill and hole being visible -through the slots
which also enables the operator to tell whether
or not the dust is being properly expelled.
In accordance with the provisions of the patent
statutes I have described the principles of opera~
tion of my invention, together with the device
which I now consider to represent the best em
bodiment thereof; but I desire to have it under
stood that the device shown is only illustrative
and that the invention may be carried out by 55
2
2,129,509
other means and applied to uses other than those
above set out.
I claim:
1. A rock drill hood including a case having an
outlet opening and also having an inlet opening
for admission of air through the side Wall of the
case, said inlet opening being of a size to permit
admission of a drill shank by sliding movement
outlet opening and also having an inlet opening
for admission of air through the side Wall of
the case, said inlet opening being of a size to
permit admission of a drill shank by sliding move
ment of the case to engage said shank, and a
spring clip secured to the top of the case and
having converging arms to resiliently receive said
drill shank to removably secure the case to said
of the case to engage said shank, and means
secured to said case and arranged for automatic
shank.
engagement of said drill shank by said sliding
movement to removably hold the case engaged
outlet opening and also having an inlet opening
with said shank.
2. A rock drill hood including a case having an
15 outlet opening and also having an inlet opening
for admission of air through the side Wall of the
case and with slots in its top and bottom Walls
communicating With said inlet opening, and hold
ing means secured to the top of the case adjacent
the slot therein to automatically engage said drill
shank by sliding movement of the case to remov
ably hold the case engaged with said shank.
3. A rock drill hood including a case having an
4. A rock drill hood including a case having an
for admission of air through the side Wall of the
case, said inlet opening being of a size to permit
admission of a drill shank by sliding movement
of the case to engage said shank, and a spring 15
clip secured to the top of the case bounding
said inlet opening and having converging arms
to removably receive said drill shank to tempo
rarily secure the case to said shank, said arms
also having diverging prongs to permit ready 20
access of said shank between said arms.
LESTER C. SMITH.
Документ
Категория
Без категории
Просмотров
0
Размер файла
258 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа