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Jan. 20, 1948.
F. E. KNIGHT
2,434,660
TOOL FOR ROTATING .THREADED ARTICLES
Filed March 2l, 1946
//
Frank E. Kai [3h
am ¿by Mpmüfßß-MH
2,434,660
Patented Jan. 20, 1948
’ Y UNITED STAT Es
PATENT VOFFICE:
2,434,660
^ 'rooL Fon RoTA'rING THREADED ARTICLES
Frank E. Knight, Northampton, Mass.
applîeation March 21, 1946, serial No. 656,120
'
2 claims.
(ol. iai-90)
y (Granted under the act of March 3, 1883, as
amended April 30, 1928; 370 0. G. 757)
2
as will be later described. Each end of hole 3 is
counterbored as shown at 5 in Fig. 2. A flat por
tion 6 is provided on one side of body I and head
governmental purposes, without the payment to
2 as shown in Fig. 1 to clear the bottom of re
me of any royalty thereon.
ceiver 4 when such tool is fastened to receiver 4.
This invention relates to an assembly tool and
The screw I0 integrally formed with body I' is
more particularly to a tool for assembling a
provided with a thread having a lead identical
threaded component.
with that of a piston retaining nut 1. Such nut
When assembling certain components to an ar
is screwed into a threaded hole 8 in a gas cylinder
ticle of manufacture there is frequently encoun
tered a component which is particularly diiñcult 10 9 provided on the underside of a barrel Il of a
firearm as illustrated in Fig. 1. Driver 20 is pro
to assemble. This is especially true of bolts or
vided with a threaded axial hole I2 and such
nuts secured in inaccessible places. The conven
driver is screwed on to screw I0. The upper half
tional wrench or screw driver for use in removal
The invention described herein may be manu
factured and used by or for the Government for
of such components from such inaccessible places
of driver 20 is preferably of hexagonal shape as
15 shown at I3 to permit a conventional open end
is either extremely difficult or impossible to use.
wrench or other type of wrench to be placed
Accordingly, it is an object of this invention to
about driver 20 to facilitate turning thereof. The
provide a tool for assembling (or disassembling)
lower end I4 of driver 20 is notched or castellated
certain threaded components to an article of
as shown in Fig. 3. Such notches correspond
manufacture.
to the notched or castellated end of nut 1. Thus
A particular object of this invention is to pro
when the notched end I4 of driver 20 is in engage
vide an assembly tool for assembling the piston
ment with nut 1, nut 'l can be readily screwed in
nut to a firearm known as the U. S. carbine,
or removed as will be presently described.
cal. .30, M1.
To assemble or remove nut 1 from the cylinder
The specific nature of the invention as well
as other objects and advantages thereof will 25 9 of the firearm shown in Figs. 1 and 2, the
notched end I4 of driver 201s placed in engage
clearly appear from a description of a preferred
ment with nut 1. The bifurcated end of head 2
embodiment as shown in the accompanying draw
of body I is then placed about an integral lug
ings in which:
_
I5 provided on the underside of receiver 4. A
Fig. 1 is a side elevational view of the assembly
tool shown in assembled relation to a firearm for 30 transverse hole I6 is provided in lug I5. When
head 2 of body I` surrounds lug I5 and hole 3 is
removal of the threaded nut;
in alignment with hole I6, a headedpin I'I is
Fig. 2 is a view similar to Fig. 1 but rotated
inserted through hole 3 and hole I6 to secure
90° to better show the manner of securing such
body I to the underside of receiver 4. The head
.
Fig. 3 is a perspective view of the driver showing 35 of headed pin I1 rests Within one of the counter
bored ends 5 of hole 3. Thus the tool is mounted
the castellated end thereof; and
in position for assembly or removal of piston nut
Fig. 4 is a perspective view of the castellated
tool to the receiver of a firearm;
piston retaining nut.
1.
To remove such nut a. conventional wrench
is placed about the hexagonal portion I3 of driver
In Fig. 1 there is shown in assembled relation
an assembly tool embodying this invention. The 40 20 and such driver is rotated. Such rotation
turns nut "I, this being possible because the lead
of the thread provided on screw II) is identical to
that of nut 'L
application such tool is utilized to assemble or re
From the foregoing description it is readily ap
move the piston retaining nut of a firearm known
as the U. S. Carbine M1. Such is only a specific 45 parent that there is hereby provided a convenient
tool for use in assembling or disassembling the
example however and should not be construed
piston nut of the U. S. Carbine, cal. .30, M1. It
as limiting the invention to such application as
is also apparent that such a. tool can be readily
the scope of the invention is suiliciently broad to
modified to remove a screw or nut from a simi
include numerous similar applications.
Body I is a cylindrical member provided on one 50 larly difficult inaccessible location and yet lie
within the scope of this invention.
end with a bifurcated head 2. On the other end
of such body, screw I0 is preferably integrally
I claim:
1. A tool for rotating a. threaded nut for as
formed therewith and axially "disposed thereto.
sembly to the gas cylinder of a firearm having
A transverse hole 3 is provided on head 2 for
tool shown in such figure comprises mainly a body
I, a screw II), and a driver 20. In the preferred
mounting such head to a receiver 4 of a firearm 55 a barrel, a receiver, a depending lug on the re
3
4
ceiver, the gas cylinder being in depending rela
tion to the barrel and relatively inaccessible, said
ing a lead of thread corresponding to the lead of
thread on the castellated threaded nut, a driver
threadably mounted on said screw, said driver
tool comprising, a body, a bifurcated head on one
end of said body arranged to straddle the lug on
the receiver of the firearm to non-rotatively se
cure the body to the firearm, a screw extending
from the other end of said body and arranged to
underlie the barrel of the firearm, said screw hav
ing a lead of thread corresponding to the lead 0f
thread on the threaded nut, a driver threadably
mounted on said screw, means on said driver for
engaging said threaded nut, and means on said
having a castellated end adapted to engage said
castellated threaded nut, and a plurality of flats
on said driver for engagement by a tool whereby
rotation of said» driver ,eiîects rotation of said
castellated threaded nut _for ,assembly or removal
o thereof to the gas cylinder.
.10'
FRANK E. KNIGHT.
y,n_EF,xt_mirzorzs CITED
driver for engagement by a tool whereby rotation
of said driver eiïects rotation of said threaded
The `following references are of record in the
nut for assembly or removal thereof to the gas 15
ifile ,0fl this retenir
UNITED STATES PATENTS
2. A tool for rotating a castellated threaded nut
Name
Date
Number
for assembly to the gas cylinder of a firearm hav.
`'101,948 Senn ____________ -_ June 10, 1902
ing a barrel, a receiver, a depending lug on kthe
vPotts ____________ __ June 5, 1923
1,458,076
receiver, the gas cylinder being in depending rela 20 1,846,099
Graham L _________ __ Feb. 23, 1932
tion to the barrel and relatively inaccessible, said
Parvin _„_,_,__
_., Mar. 10, 1936
`2,0Z>‘3,892 ~
cylinder.
tool comprising, a'body, a bifurcated head on one
fendof said body arranged to straddle the lug on
the `receiver of the ñrearm to non-rotatively se
.cure the body to the firearm, a screw extending
from the other end of said body and arranged to
underlie the barrel of the iirearm, said screw hav.
>2,267,012
Bowne ....-‘_„-_,_,_,_____ Dec. V23,-1941
FOREIGN PATENTS
2,5 Number
5,155
Country
_Date
Great UBritain ,___Y--- Mar. 15, 1909
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