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Патент USA US2404583

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‘July 23, 1946;
Filed June 1, 1944
' ‘2,404,583
4 Sheets-Shec/at l_
July 23, 1946-
Filed June 1,; 1944
4 Sheets-Shea’; 2
July'23, 194-’6.'
_ 2,404,583
Filed ‘June 1; ‘1944
4 Sheets-Sheet 3
....... n
July 23, 1946-
‘Filed June 1; 1944
4 Sheets-Sheet 4,
2‘ o M16
b In“
ab '9 b
Patented July 23,1946
‘ 2,404,583
William ?rMcCollister, Akron, Ohio, assignor to
The Firestone Tire & Rubber Company, Akron,
Ohio, a corporation of Ohio
Application June’l, 1944, SerialgNo. 538,276
2 Claims. (Cl. 157-6)
This invention relates to improved tire remov
ing tools,’ and more especially it relates to tools
of the character mentioned adapted to force the
bead portions of‘ a pneumatic tire casing later
ally o? the bead seats and away from the lateral
?anges of a tire rim upon which the tire is
‘a The tool is of especial utility for removing tires
from “drop center” rims whereof each lateral
flange is an integral portion of the rim. It is also
especially suitable for removing extremely large‘
tires, such as the tires of bomber airplanes, tires
of mobile artillery, and tires used with heavy
earth-moving equipment. Such tires are inher
ently stiff, which contributes to the difficulty of
their removal. Furthermore, they frequently ad
here tightly to the rims due to rust and the like,
and in cases where the rims are provided. with
' .
showing the tire removing tool in the initia
phase of operation in removing a smooth con
tour tire from a tire rim without brake drum;
Fig; 6' is a view of the structure shown in Fig.
5 in the succeeding phase of tire-removing op
Fig. '7 is a section, on a larger scale, of a frag
mentary portion of a tire bead and tire rim of
the type shown in Figs. 5 and 6, and work-engag
ing portions of the improved tire removing tool,
shown in side elevation, operatively associated
Fig.8 is a View similar to Fig. 7 showing the
tire removing tool in operation upon a tire and
rim of the type shown in Figs. 1 to 4 inclusive;
Fig. 9 is a bottom plan view of a hook member
constituting one vof the elements of the tire re
moving tool;
integral brake drums, the heat generated by brak
ing friction may fuse the tires to the rims. In
other cases the bead seats of the rims are sloped
so that the tire beads are wedged thereon. It
is common occurrence for the tire beads to cling
Fig. 10 is a plan view of the work-engaging
end portion of a lever member constituting an
other element of the tool of the invention;
Fig. 11 is a section on the. line Il-ll of Fig. 7
showing how the tool elements of Figs. 9 and 10
engage each other; and
to the rim structures with such tenacity that
the vigorous effort required to free them results 25 Fig, 12 is a perspective view of anotherem
bodiment of the invention shown in operative as
in damage to the tires; In some cases such dam
age is so severe or extensive as to ruin the tire
sociation with a tire rim and a tire mounted
and require the discarding thereof.
Referring to the drawings, it will be seen‘ that
The chief. objects of the invention are to pro
vide an improved tire removing tool capable of 30 the essential elements of the improved tire re- 7
moving tool comprise an elongate hooked bar I6,‘
operating upon tires on rims of various diam
a hook 11,, a hand lever l8 engageable with the
eters; to provide a tool of the character. men
bar IG‘and hook IT for moving them relatively
‘ tioned that will not mutilate the tire upon which
of ‘each other, and a .lever l9 that utilizes the
it is used; that provides facility of application
to a. tire; that is capable of exerting leverage ade 35 hook I‘! as a fulcrum and is manually operated
to force the head of atire away from the flange
quate to loosen a tire from a ‘rim; to provide for
of a tire rim upon which the tire is mounted.
varying said‘ leverage progressively as a tire bead
is moved away from a rim ?ange; and to provide
Removal of a tire is'facilitated by the use of a
moving operation;
in the hookedbar l6. By inserting the pivot, pin
22 in. various apertures 2|, the device may be ad
second hook H, the same being employed in a
a tire removing tool adapted to operate with
equal facility upon tires and rims ofvarious types. 40 manner hereinafter to be explained. of ‘ metal; 7‘ is’
. The hooked bar l'6'is composed
More speci?cally, the invention aims to provide
form'ed'with a hook portion l6a at one end there
a tire removing tool comprising .a lever element
of, the end or nose of said hook portionbeing
constructed and arranged to provide a rolling
?at or blunt as shown. Said bar also is pro
fulcrum for the latter. Other objects will be
45 vided throughout its length with pivotal bearing
manifest as the description proceeds.
means consisting of a plurality of apertures 2!,
Of the accompanying drawings:
2|.‘ The hand lever l8 consists of a rigid metal
Fig. 1 is a perspective .view showing the pre
bar having a forked or bifurcated end portion
ferred embodiment of the improved tire. remov
l8a adapted to straddle the hooked bar [6 and ing tool in the intial phase'of operation in re
pivotally connectible with the latter by means of
moving a balloon tire from a tire rim having a
a pivot pin. 22 insertible. through aligned aper
brake drum mounted thereon;
tures formed in the, forked portion l8a of the
Figs. 2, 3 and 4am views of the structures
member l8 and through one of the apertures 2.!
shown in, Fig. 1 in succeeding phases of tire-re
‘r .‘Fig. 5. is1a perspective view similar to- Fig. 1 , 55
justed for operation upon tires of various bead
diameters. The bifurcated end portion l8a of
with a small rib or bead 28, the function of which
presently will be manifest.
lever [B is formed with marginal recesses or
Describing now the operation of the improved ’
notches V23, ‘23, which notches extend obliquely
tire removing tool, attention ?rst is directed to
Figs. 1 to 4 inclusive and Fig. 8 of the drawings
upwardly toward the margins of the fork ele
ments, which margins face the hook portion I?a
when the member [8 is in operative association
with the‘ member [6.
There are two pairs of '
notches 23, one pair being nearer the pivot pi
wherein the‘ tool is shown removing a low pres
sure balloon tire 33 from a drop center rim 3|
having a brake drum 32 attached thereto and
extending axially from one side thereof.
22 than .the other.
10 the tire de?ated and resting upon a flat hori
The hook I’! has a broad substantially ?at .
zontal surface, the tire tool is properly assem
nose portion at one end thereof adapted for inbled so that hook portion its of the bar I6 and
sertion between the bead portion of a tire andv hook I1 will engage the tire rim. In such as
a marginal ?ange on the rim on which the tire" ‘ sembly the vend or second stud 25 of hook I‘! is
is mounted. The opposite end portion of the
engaged in the end notches in hand lever I8, the
hook I‘! is ?attened laterally so as to constitute
arrangement being such as to incline the point
a shank Ila, which shank is receivable in the
or nose of the hook so that it will start under
forked portion l8a of the hand lever 18, below ‘
thelrim ?ange, the latter being designated 31a.
the pivot pin 22 therein. The shank Ha of the
Such inclining of the nose of the hook is made
hook is provided with a pair or studs 25, 25, said 20 necessary by the curved or bulging sidewall of v
studs being spaced apart longitudinally of the
the tire. By pulling on the hand lever 18 in. the
hook-shank and projecting from each side there
direction indicated by the arrow in Fig. 8, the
of, said studs being receivable alternativelyin
hook i? may be started between the rimand'the .
either-pair'of notches’ 23 in the forked end‘ por
tiono'f the hand lever l8.‘
When the bar element i6, hand lever 18/, and
bead portion of the tire.
After the hookris en->
25 gaged,‘ ‘the hand lever i8 is loosened and the
stud 25 (whichever stud is conveniently posi
tioned) is engaged in the inner notches 230i the
handlever, as shown in Fig. 2. This increases
hook member H are assembled‘ in the manner
described, the hand. lever is may be ,moved in
the direction indicated by the arrows in Figs.‘ 7
the leverage, so that movement of-the hand lever
and 8 to moiresaid‘hook. ll toward-the hooked 30 forces the hook down between the‘ tire bead and
end portion t?a of the bar it. ' When the tool is
rim ?ange.
employed for removing a tire, the hooked end 7
then removed, leaving the ‘hook H in- place under
16a of the barl? is engaged with the ?ange of
atire rim, the force applied to the hook I‘! being
su?icient to force the: latter between. the rim
flange and tire bead, at‘ the diametrically oppo
fully explained. Leverage applied topthe hook
inches away from the ?rst hook H, and: is forced
same. manner as the ?rst hook H. The lever l9»
now is pushed between the, tire bead and ‘rim'
i'Fm-ay' be varied. by engaging the studs 25 there
of in different recesses 23' of the hand lever 18.‘
?ange, beside the second hook ii, in the slight
gap which has just been opened by said hook, as
The simple stud and slot. connection between the
hook and hand lever makes the connecting and
disconnecting of these. elements a simple matter.
An'important feature of. theinvention is the
provision of means enabling more emcienteo'op
eration'between the hook ti- and the lever!!!‘v
that utilizes‘. said book? as .a fulcrum, as presently
is shown in Fig. 3. if necessary the lever is may
be forced ?rmly into place by means of a rubber-w
tipped hammer. The bar It and hand lever I8;
are then released and the hook 11 next to the
lever I9 is removed from the tire. Then said
hook is superposed upon the work-engaging end
portion of the lever l9, with the‘ groove 21 of the
convex’ side of the vhook straddling the lever.
The bar it and hand lever is are againasseirie
Such means comprises a shallow
groove or recess 27 formed. in. the hook on the
' convex side thereoh'said groove extending rear->
wardly from the nose ‘of theihoot: and-‘merging
'Next, a second hook i1 is positioned 3 or 4
between the tire bead and rim ?ange by means
of the bar It and hand lever; It in ‘exactly the
sitesi’de of the rim, as presently will be more
will appear.
The bar it and hand lever [8 are
the rim ?ange.
bled and by means thereof the hook ii is engaged ‘
with the surface oithe hook altits rear end.- As ' . and forced toward? the rim, as shown-in Fig; 4. '
most clearly shown in Flgseiand 1.0,the lat
The point of‘the hook enterslike' a wedge‘ bee
eral walls or. margins Zia, Z'lmoi said-groove are‘
beveled or slopedso that the bottom ot'the groove
tween'therim ?ange 3rd, and thepoint of lever
l 9‘, forcingv the latter downwardly, and also‘forc-v
ing it forwardly because of tl1e'inter~engagement
is'narrower than the top thereof. Furthermore
the margins 27a. of the groove are disposed
oi the nose of the lever with. the groove 21in
the hook. The: position of the tool parts at; this
time is best shown in. 'Fig'.v 8. The lever 1&9? is
obliquelywvi-th. reia'tionltouea'ch other and to the
rcenterline .o?the hock, andv progressively. ‘con
verge towardeachother rearwardly; from the‘
nose“ of the hook. "?ie'lever t9 has: its work-,
engaging, operative end portion." Hla'p?attened,
which ?attened portion i?slightly arcuatelongie
tudinally' of the lever. said ?attened portion
aisjohas lateral margins that ‘diverge‘toward the
operative end thereof, said‘. diverging margins
‘being beveled at 1%,. tab on the'coneavejside. of
said ‘end portion. li-i'm ' Thetaperxandlbeveh of
~ .
thentl'iite'd. in‘ the’ vdirection indicated by';_-the
arrow irrEig. .8“ :to .force the tire-bead, dowrie'
, wardly: away" from‘ itherim ?ange in. a .local
As the lever Leis‘ lifted in the manner;de-=_
65 scribed, it fulcrmns upon- .the nose? portionoof; the
hook it“, and said‘fulcrum’ progresses .01‘ rolls
rearwardiy ‘from: the ' ‘nose. of the hook and . the
lever ‘as the. angular position of the leverin-e
end portion issaof lever isaare .complemental to
creases: Thus it will. be‘ seen. that: the: lever has
the-taper‘andbevei: oi the lateral margins 21a of
70 greatest‘ mechanical advantage when .ittis'?ne'
‘ "the groove 2% in the. nose of hook ll, the arrange
itially applied, and that as ‘its mechanical advan-.
. 'ment being such. asto enablejinter?ttingi ofzthe '
tage decreases the are. of movement of itsopera
lever andzhook as is clearly shown in Fig.1];
tive end“; portionincr‘eases and" thereby. imparts
nose-"lore terminus of .the'end' portion we of
sufficient movement to the tire: be'aidittor. mrlvea
‘ lever‘ Isis formed, on the convex ‘side thereof, '
substantial local. region thereo? ctr the'tbeadzseat
ing portion of the rim. The complementally bev
eled margins of the lever l9 and hook-groove 21
enable the lever readily to be received in said
groove, and the complemental taper of said
groove and the lever portion received therein
prevent relative longitudinal movement of lever
and hook as leverage is applied to the tire bead.
by oscillating the hand lever 42 the bars 31, 33
may be moved longitudinally relatively of each
other, whereby the hook portions 38, 40 of said 7
bars are moved toward each other for the pur
pose of forcing the nose portion of hook 40 be—
tween a tire bead and a rim ?ange. The hook
portion 4i] of bar 39 has its nose formed with a
central tapered groove (not shown) similar to the
Slippage of the lever relatively of the hook also
groove 21 of hook ll of the previously described
is opposed by the rib 28, on the nose of the lever,
which rib presses into the. heel of the tire bead 10 embodiment of the invention, and a lever 45,
identical with lever I9 is provided and is adapted
during the prying operation described. Said rib
also prevents mutilation of the tire bead by the '
lever as the end of the latter moves relatively of
to use the hook structure 40 as a fulcrum for
forcing a tire bead away from a rim ?ange in the
previously explained manner characteristic of the
the tire bead.
The operation described is repeated at several
The tire removing tool shown in Fig. 12 is es
points circumferentially of the tire until one
sentially similar to the embodiment of the inven
bead thereof is completely loosened from the
tion ?rst described, it operates substantially in
tire rim. The tire is then reversed and the same
the same manner as the latter, and achieves sub
procedure followed to loosen the other tire bead
from'the rim. The tire may then be removed 20 stantially all of the advantages set out in the
statement of objects of the invention.
from the rim in the usual manner.
Other modi?cation may be resorted to without
The operation of removing a smooth contour
departing from the spirit of the invention or the
tire from a rim is shown in Figs. 5, 6 and '7 of
scope thereof as de?ned by the appended claims.
the drawings wherein the tire is designated 34
What is claimed is:
and the rim, of drop center type without brake
1. In a tire removing tool of the character de
drum, is designated'35. The tire tool is assembled
scribed, the combination of a prying lever having
in the manner previously described except that
an operative end portion adapted to enter be
the outer stud .25 of the hook I1 is engaged in the
tween a tire bead and a tire rim ?ange, a hook
upper notches 23 of the hand lever l8, as shown
in Fig. 5. The tool is then applied to the tire and 30 member engageable with a tire rim ?ange at one
side thereof, a second hook member adapted to
the hook forced between the tire bead and the
enter between said tire rim ?ange and the end
rim ?ange. The hook is then disengaged from
portion of the prying lever therebeneath, a hand
lever connectible to said hook members and op
same manner about 3 or 4 inches from the ?rst
hook, as is clearly shown in Fig. 6. The re 85 erable to apply leverage thereto to draw them to
' the tool, and a second hook I‘! is inserted in the
mainder of the operations are identical with the
steps employed for removing a balloon tire from
a rim, so that a description thereof need not be
repeated. In Fig. '7 is shown how the lever 19 is
ward each other and thus to force the second
hook member farther beneath the tire bead
?ange, and inter-engaging means on the second
hook member and the operative end of the pry
40 ing lever adapted to move the said prying lever ‘
The improved tool is adjustable and may be
with said second hook member as the latter is
forced beneath said rim ?ange, said second hook
utilized for removing tires of all sizes from their
member constituting a rolling fulcrum for the
rims. The invention makes it possible to loosen
the most tightly mounted tires without mutila
prying lever when the latter subsequently is
tion or other damage thereto, and achieves the 45 operated to loosen the tire from the rim.
other objects set out in the foregoing statement of
2. In a tire removing tool of the character de
scribed, hook members adapted to engage a tire
The embodiment of the invention shown in
rim simultaneously at diametrically opposed
Fig. 12 is adapted for operation upon but one size
points and to enter between a tire bead and a
and type of tire and rim. The tool shown com 50 tire rim ?ange, means for applying a force be
prises an elongate metal bar 31 formed with a
hook portion 38 on an end thereof, and another
elongate bar 39 formed with a hook portion 40 on
an end thereof. The bar 31 has a pair of loops
tween said hook members to draw them toward
each other, and thus to urge said hook members
simultaneously between the tire bead and the rim
?ange, a prying lever having an operative end
or straps 4|, 4| welded thereto at spaced points 65 portion adapted to enter between one of said hook
thereon, the straps 40 being arranged loosely to
members and the tire bead and interengaging
embrace the bar 39 in the assembled condition 'of
means on said latter hook member and said pry
the tool. The arrangement is such as to enable
ing lever adapted to move said prying lever with
the bars to move longitudinally relatively of each
said hook member as the latter is forced beneath
other, and to move toward and away from each 60 said rim ?ange, said latter hook member consti
other to a limited extent. A hand .lever 42 has a .
tuting a rolling fulcrum vfor said prying lever
forked end portion that is pivotally connected to
the bars 31 and 39 by removable pivot pins 43 and
44 respectively. The arrangement is such that
when the latter subsequently is operated to loosen
the tire from the rim.
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