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OÉt- 15,' 1946- ‘
H. D. RocHEvlLLE
l
2,409,589
RÍVET REMOVING DEVICE
ì Filed Aug. 29', 194s
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2,409,589
Patented Oct. 15, 1946
UNITED STATESA PATENT OFFICE
2,409,589
nivET nEMoviNc DEVICE
Harry D. Rocheville, Los Angeles, Calif., assignor
to Consolidated Vultee Aircraft Corporation,
San Diego, Calif., a corporation of Delaware
Application August 29, 1945, Serial No. 613,378
6 Claims. (Cl. 164-94)
1
2
The present invention relates to devices for re
nular cutting edge in proper relation with the
moving rivets.
Heretofore it has been customary to remove a
rivet from the plates to which it is applied by
placing against the preformed or upset head of
the rivet a drill having substantially the same
diameter as the shank of the rivet, and then'
rotating and exerting pressure on the drill in or
der to drill through the rivet and sever from the
shank of the rivet the head against which the
drill is placed. In practice it has been found
that this method of removing a rivet is objection
able because in connection with drilling of the
rivet it is very diflicult to hold the drill in co
axial relation with the shank, and hence the drill
produces in the plates oversized or irregularly
shaped holes which precludethe use of a new
rivet of the saine size as the removed rivet. The
aforementioned method is also'objectionable be
cause it requires considerable time and conse
quently is costly.
The primary object of the invention is to pro
vide a rivet removing device which is an improve
ment upon, and eliminates the objections of, pre
viously designed and used devices for the same
purpose, operates by Way of percussion or ham
mering, and is characterized by the fact that it
will, when properly used, quickly remove a rivet
head during a rivet removing operation.
Another object of the invention is to provide a
rivet removing device of the type and character
under consideration which comprises in addition
to the arbor, means for automatically retracting
the arbor after a rivet removing operation.
`
A further object of the invention is to provide
a rivet removing device of the last mentioned
character in which the arbor retracting means is
in the form of a springloaded sleeve-like jacket
which fits slidably around the tool carrying end
ef the arbor and has at its from; 0r outer end a
cross wall having a central ` aperture through
which the cutting tool extends slidably.
4
` `
A still further object of the invention is to pro
vide a rivet removing device which effectively
and efficiently fulfills its intended purpose, is so
designed and constructed that it may be pro.
-duced at a low cost, and embodies simple and
novel means for detachably connecting the'ar
bor to the operating end of the rivet gun-`
’
Other objects of the invention and the various
advantages and characteristics of the present
rivet removing device will be apparent from a
consideration of the following detailed descrip
tion.
'
The invention consists in the several novel fea
without enlarging or distorting the rivet receiv- \
tures which are hereinafter set forth and are
ing holes in the riveted plates. In general the `subject device comprises an‘arbor having'one end
thereof adapted _for connection to the operating
more particularly defined by the claims at the
end of a standard‘or `conventional rivet gun and
i its other end provided with a cylindrical `coaxial
cutting tool, the‘outer end‘of which has an an-"l
nular cutting edge which is adapted to be placed
in centered relation with the preformed head of
, the rivet to be removed and operates in response
, to actuation of the rivet gun to sever the outer
portion of the preformed head from the rivetíî
shank and eject the shank from the holes in the
riveted plates.
Another object of the invention is to provide a
rivet removing device of the aforementioned type
in whichtheouter end of the cylindrical cutting?
tool on the arbor embodies a pilotpoint which is
disposed centrally within the annular cutting
edge and is adapted when the device is used to
conclusion hereof.
‘
In the drawing which accompanies and forms
a part of the present disclosure or specification
and'in which like numerals of reference denote
corresponding parts throughout the several
views:
’
‘
`Figure 1 is aside view of a rivet removing
` device embodying the invention;
Figure 2 is a longitudinal section of the device,
illustrating in detail the construction of the cut
ting tool and showing the design and manner of
mounting of the spring loaded sleeve-like jacket
that constitutes the means for retracting the
arbor after a rivet removing operation;`
Figureß is a front view of the device, showing
, in detail the manner in which the centrally aper
tured cross wall ,at the outer or frontend of
l the jacket serves to support and guide the cutting
remove a rivet having a so-called dimple in the
tool; and
center of its preformed head to lit within they
dimple and thus hold the annular cutting edge
in centered relation with the preformed head,
Figures 4, 5 and 6 are enlarged fragmentary
sections illustrating the manner inwhich the de
or when the device is used to remove a rivet
eted plates.
having no dimple in its preformed head to form a
dimple in the head and thus maintain the an
The device which is shown in the drawing con
Stitutes the preferred form or embodiment of the
,
vice operates to remove a rivet from a pair of riv
l
‘
2,409,589
3
4
invention, and, as described in detail hereafter,
such head from the rivet shank 1a.
serves as a medium or instrumentality for re
the outer portion of the preformed head of the
rivet is severed from the shank by the cutting
edge I8, additional or further hammering of the
moving a rivet 'I from a pair of abutting plates 8.
It is adapted for use in connection with, and to be
As soon as
attached to the operating end of. a conventional 5 arbor results in the front end face of the cut
or standard pneumatic rivet gun (not shown)
ting tool I0 ejecting the shank of the rivet from
and as its principal components or parts com
prises an arbor 9, a cutting tool'IDy and a sleeve
like jacket :I I. As shown in Figure 4, the rivet 'I
embodies a cylindrical Shank 'la which extends 10
through a pair of registering holes 8a in thel
plates 8 and has at one end thereof a preformed
head 'Ib with a dimple ‘lc in the center thereof,
and at its other end an upset head 1d. When the
rivet is in place the two heads abut, respectively, 15
against the outer faces of the plates 8 and serve,
as well understood in the art, to hold the plates
in clamped relation.
the rivet holes 8a in the plates 8. The cutting
tool is of such length that in connection with
hammering of the arbor it willpass completely
through the rivet holes 8a as shown by dotted
lines in Figure 5. The central portion of the
outer end face of the cutting tool, that is, the
portion within the circular groove il, is shaped
to form a pilot point I9. This point projects be
yond or outwards of the cutting edge I8 and is
adapted when the device is manipulated into its
operative position to fit within the dimple 'lc in
the preformed head 'Ib of the rivet and main
The arbor 9 of the device is formed of any
tain the cutting edge in centered relation with
suitable metal stock of circular cross section and 20 the preformed head. In the event that the de~
has at one endthereof a reduced shank I2 which
vice is used to remove a rivet having no dimple,
is shaped to lit-loosely in the nozzle of the rivet
the pilot point i9 serves to form a dimple in the
gun and is of suchv‘length that when the device
center of the head and thus maintain the cut
isin connected relation` with the gun it-is dis
ting edge i8 in centered relation with the head.
yposed in the path of Ythe reciprocating hammer 25
The sleeve-like jacketv II surrounds, and is in
-of the gun and-receives the successive impulses
sliding engagement'with, the front end of the
or hammer >blows of the hammer. -A helical
' arbor 9 and together with a helical compression
spring I3 of greater diameter than the >shank I2
spring 2i) serves to'retract the arbor from the
surrounds, and is arranged in concentric vrelation
plates 8 after a rivet removing operation. It is
--with,«the shank and-serves detachably-to connect 30 preferably formed of metal and has at the front
the device to the rivet gun. This spring is adapt
end thereof an integral cross wall 2l. The lat
edA to interñt with, and be screwed onto, the usual
ter is adapted in connection with use of the de
external screw thread on the nozzle of the rivet
vice to iit against the preformed head 7b of the
» gun. The front end of the springr I3'is tapered
rivet l, and has in the central portion thereof a
and has thexextremity thereof suitably anchored
substantially circular aperture 22'in which the
to the inner‘portionof the shank 42. When it is
outer end of the cutting tool is slidably mounted.
v»desired to'connect fthe device to the rivet gun
The compression spring 20 surrounds the central
theA shank l2 is ñrst -inserted intov the nozzle of
portion ofthe arbor 9 and has one end thereof
„the gun. vThereafter the arbor` 9 is rotated in
in abutment with the inner or rear end of the
'order -.to bring the spring I3 into sorewfthreaded 40 sleeve-like jacket l I. The other end of the spring
.engagement with the external` screw thread on
abuts against the ends of a pin 23 which ex
the gun nozzle. To remove-the device it is only
tends through, and is held by a drive rit in, a
necessary reverselyto turn or rotate the arbor.
transverse holeV 24 in the arbor. Prior to pene
The other- or ifront- end ofthe arbor is‘provided
tration of the cutting edge I8 of the cutting
Yin the extremity thereof with a cylindrical sock 45 tool into the preformed head of the rivet the
et =I4. -As `shown'inxthe drawing, this socket ex
`spring 2i) is in its extended condition and the
tends lengthwise of, and is in coaxial relation with,
cross wall 2l at the front end of the jacket II
the arbor.
is disposed directly behind the cuttingedge. In
`The Ycutting tool >It) is cylindrical. Itis prefer
connection withy a rivet removing‘operation in
ably formed rof hard metal andis substantially the 50`the jacket II, after abutment of the cross Wall
same in diameter as the socket I4. ' VOne end of the
22 against’the preformed head of the rivet, re
>outtingr‘tool IS fits Withinthe lsocket fI/t and is
mains stationary and the arbor and cutting tool
;held"in~connected relation withthe frontend of
move forward relatively tothe jacket. During
Nthearborf` 9 by way of a set screwí :I5 which, as
forwardy movement of the arbor and tool the
'shown inFigure 2, extends through a‘transverse 55 spring '29 is compressed. - When the device after
screw threaded hole I5. The latter is formed -in
a rivet removing operation is released the spring
the front end ofv the arbor and communicates with
28 extends or expands and operates automati
the central portion of'the socket: M. `The di
callyito effect retraction of the arbor and cut
ameter 'of the cutting Vtool la is slightly less'than
ting tool. The upper portion o-f the cross wall
the diameter .of lthe rivet holes 8a in the plates 60 ZI is provided with a V-shaped notch' 25 which
8. The'front end face of the cutting tool is pro
leads to, and intersects, the circular aperture 22
vided with-a> circular groove I? which is semi~
and enables the user of the device readily to
circulariin cross sectionaandserves to form out
observe the yiront end of the cutting tool Ii] dur
wards thereofan annular cutting edge 'i8 ‘at the
ing application thereof to the central portion of
front end of l'the cutting tool. vIn connection with 65'the preformed head of the rivet. The front up
-vusefof the device, ~theV cutting edge I8 isplaced
per portionv 'ofl the sleeve-like jacket II is pro~
against the central-portion of the preformed head
'.'Ib ofthe rivet 1 while the arbor 9 is held in
coaxial relation with the shank of ythe frivct.
vided with a coutout 25 and this extends rear
wards from the upper portion of the cross wall
'2l and permits the user of the device to see
:After properly positioning the> cutting edge; the 70 through the notch 25. Forward sliding move
»rivetfguniistactuated so. as toeffect hammering
ment of the jacket relatively tothe arbor 9 is
»ofithe' arbor 9. (During hammering `of the. arbor
limited by way of a stop pin' 2i'. ' Thisfpin has
the cutting edge I8 penetrates throughthe cen
one end thereof disposed in- a socket .28 in the
tral portion of the preformed head 'Ib _of the
-upper frcntpcrtion of the arbor 9 and is adapted
Yrivetv 'land operates to sever the outer portion of '(5 to be ¿engaged by the portionof .the 'sleeve-like
2,409,589
jacket I I that defines the rear end of the cut
out 2E.
When itis desired to use the device the arbor
is manipulated into a position wherein the pilot
point I9 is disposed inthe dimple ‘Ic in the cen
ter of the preformed head 'Ib of the rivet l. After
so manipulating the arbor and while the arbor is
maintained at right angles to the plate, the rivet
gun to which the> device is attached is actuated.
As soon as the gun is started the arbor isrham
mered forwards with the result that the annular
cutting edge i8 penetrates through the preformed
head 'Ib and severs the outer portion of the head
from the shank of the rivet. Directly upon sever
ance of the outer portion of the' preformed head
from the rivet shank, the outer end face of the
cutting tool in connection with further forward
movement of the arbor ejects the shank 'la of the
rivet from the rivet holes 3a in the plates 8. Dur
ing forward travel or movement of the arbor and
cutting tool the sleeve-like jacket I I remains sta
tionary so long as the cross wall 2| thereof is in
abutment with the preformed head 'Ib of the
rivet. When the device is released after removal
of the rivet l the jacket Il and the spring 29
operate to retract the arbor and cutting tool as
hereinbefore pointed out. When the device is
removed from the plates the severed outer por
tion of the preformed head of the rivet drops. It
6
the rivet shank and eject the shank from the
holesin the plate.
2. A device adapted in conjunction with a rivet
gun to remove a head-equipped rivet from a plu
rality of abutting plates with registering holes
therethrough for the shank oi the rivet, and com
prising an elongated arbor having one end thereof
shaped to ñt within the nozzle of the rivet gun
and extend into the path of the gun hammer and
provided with means for yieldingly holding it in
connected relation with the gun nozzle, and a cut
ting tool of less width than the holes in the plates,
connected to the other end of the arbor, extend
ing lengthwise of said arbor, having on the outer
end face thereof a continuous cutting edge for
placement against the central portion of the head
of the rivet and in addition a centrally disposed
pilot point projecting outwards of the cutting
edge, and adapted when said cutting edge is
placed in centered relation with the head of the
rivet and the arbor is subjected to hammer blows
by the gun to sever the outer portion of the rivet
head from the rivet shank and eject the shank
from the holes in the plate.
3. A device adapted in conjunction with a
percussion type rivet gun to remove a head
equipped rivet from a plurality of abutting plates
with registering circular holes. therethrough for
the shank of the rivet, and comprising an elon
is contemplated that during a rivet removing op- : : gated arbor having one end thereof shaped to iit
eration the upset head of the rivet will be sur
rounded by any suitable backing bar (not shown).
The herein described rivet remo-ving device
is highly efficient in operation and operates to
remove a rivet in an exceedingly short period of 35
within the nozzle of the rivet gun and extend into
the path of the gun hammer and provided with
means for yieldingly holding it in connected rela
tion with the gun nozzle, and a cylindrical cut
ting tool of less diameter than the holes in the
time. When properly used the device will remove
plates, connected to the other end of the arbor,
a rivet without enlarging or distorting the rivet
extending lengthwise of said arbor, provided in
holes in the riveted plates. Because of this par
its outer end face with .a concentric circular groove
deñning outwards thereof an annular cutting
ticular feature it is possible after the device has
been used to remove a damaged or faulty rivet 40 -edge for placement against the central portion of
the head of the rivet, having the portion thereof
to apply a similar sized rivet in its stead. Be
within the groove shaped to form a pilot point
cause the device is essentially simple in design it
extending outwards . of the cutting edge, and
maybe manufactured at a low cost. The subject
device is capable of removing all forms or types 45 adapted when said cutting edge is placed in cen
tered relation with the head of the rivet and the
of rivets including rivets having countersink
arbor is subjected to hammer blows by the gun to
variety preformed heads.
sever the outer portion of the rivet head from the
'I‘he invention is not to be understood as re
rivet shank and eject the shank from the holes
stricted to the details set forth since these may
in the plate.
be modified within the scope of the appended 50
4. A device adapted in conjunction with a rivet
claims without departing from the spirit and scope
gun to remove a head-equipped rivet from a plu
of the invention.
rality of abutting plates with registering circular
VHaving thus described the invention what I
holes therethrough for the shank of the rivet,
and comprising an elongated arbor having one
claim as new and desire to secure by Letters Pat
ent is:
end thereof shaped to fit within the nozzle of
1. A device adapted in conjunction with a rivet
the rivet gun and extend into‘the path of the
gun to remove a head-equipped rivet from a plu
gun hammer and provided with means for yield
rality of abutting plates with registering circular
ingly holding it in connected relation with the
holes therethrough for the shank of the rivet,
and comprising an elongated arbor having one
end thereof »shaped to fit within the nozzle of the
rivet gun and extend into the path of the gun
hammer and provided with means for yieldingly
holding it in connected relation with the gun noz
zle, and a cylindrical cutting tool of less diameter
than the holes in the plates, connected to the
other end of the arbor, extending lengthwise of
said arbor, having in its outer end face a concen
tric annular groove defining outwards thereof an
gun nozzle, a cylindrical cutting tool of less diam
eter than the holes in the plates, connected to
the other end of the arbor, extending lengthwise
of said arbor, having in its outer end face a con
centric annular groove defining outwards thereof
an annular cutting edge for placement against
the central portion of the head of the rivet, and
adapted when said cutting edge is placed in
centered relation with the head of the rivet and
the arbor is subjected to hammer blows by the
gun to sever the outer portion of the rivet head
annular cutting edge for placement against the 70 from the rivet shank and eject the shank from
central portion of the head of the rivet, and
the holes in the plate, and means for retracting
adapted when said cutting edge is placed in cen
the arbor and tool after a rivet removing opera
tered relation with the head »of the rivet and the
tion, consisting of a sleeve-like jacket mounted
arbor is subjected to hammer blows by the gun .to
on said other end of the arbor to slide longitu
sever the outer portion of the rivet head from
dinally to a limited extent and provided at its
2,409,589
7
outer end with a cross wall adapted in connection
with a rivet removing operation to abut against
the head of the rivet and having in the central
portion thereof an aperture through which the
tool extends slidably, and a spring mounted on
the arbor and arranged to urge the jacket out
wards relatively to said arbor.
5. A device adapted in conjunction with a rivet
gun to remove a head-equipped rivet from a
plurality of abutting plates with registering cir
cular holes therethrough for the shank of the
rivet, and comprising an elongated arbor pro
vided on the central portion thereof with an abut
ment forming element and having one of its ends
shaped to ñt within the nozzle of the rivet gun
and extend into the path of the gun hammer and
embodying means for yieldingly holding it in con
nected relation with the gun nozzle, a cylindrical
cutting tool of less diameter than the holes in
the plates, connected to the other end of the
arbor, extending lengthwise of said arbor, hav
ing in its outer end face a concentric annular
groove defining outwards thereof an annular cut
ting edge for placement against the central por
tion of the head of the rivet, and adapted when
said cutting edge is placed in centered relation
ment with the inner end of the jacket,” andar
ranged to urge the jacket outwards relatively
to said arbor.
.
'
6. A device adapted in conjunction with a rivet
gun to remove a head-equipped rivet from a plu
rality of abutting plates with registering circu
lar holes therethrough for the shank of the rivet,
and comprising an elongated arbor having one
end thereof shaped to fit Within the nozzle of
the rivet gun and extend into the path of the
gun hammer and provided with means for yield
ingly holding it in connected relation with the
gun nozzle, a cylindrical cutting tool of less di
ameter than the holes in the plates, connected
to the other end' of the arbor, extending length
wise of said arbor, having in its outer end face
a concentric annular groove deñning outwards
thereof an annular cutting edge for placement
against the central portion of the head of the
rivet, and adapted when said cutting edge is
placed in centered relation with the head of the
rivet and the arbor is subjected to hammer blows
by the gun to sever the outer portion of the rivet
head from the rivet shank and eject the shank
25 from the holes in the plate, and means for re
traoting the arbor and tool after a rivet remov
ing operation, consisting of a sleeve-like jacket
with the head of the rivet and the arbor is sub
mounted on said other end of the arbor to slide
jected to hammer blows by the gun to sever the
longitudinally to a limited extent and provided
outer portion of the rivet head from the shank
and eject the shank from the holes in the plate, 30 at its outer end with a cross wall adapted in con
nection with a rivet removing operation to abut
and means for retraoting the arbor and tool after
against the head of the rivet and having in the
a rivet removing operation, consisting of a sleeve
central portion thereof an aperture through
like jacket mounted on said other end of the arbor
which the tool extending slidably, and a spring
to slide longitudinally to a limited extent and
mounted on the arbor and arranged to urge the
provided at the outer end thereof with a cross
wall adapted in connection with a rivet removing
operation to abut against the head of the rivet
jacket outwards relatively to said arbor, said
and having in the central portion thereof an
shaped notch leading to the aperture and having
aperture through which the tool extends slid
ably, and a, helical compression spring extend
ing-around the central portion of the arbor, hav
ing one end thereof in abutment with the afore
mentioned element and its other end in abut
jacket being provided in its cross wall with a V
a cutout communicating with, and leading rear
40 wards from, the notch in order to permit the user
of the device readily to view the tool.
HARRY D. ROCHEVILLE.
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