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Патент USA US2108329

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Féb. 15, 1938.
-
B, D, CARTER
’
2,108,329
TIRE CASING AND RIM
Filed May 10, 1937
INVENTOR.
31fm31
l
BURTON D. CARTER
EM
ATTORNEY.
2,108,329
I Patented Feb. 15‘,
UNITED STATES PATENT OFFICE
2,108,329
TIRE CASING AND RIM
Burton 1). Carter, Aberdeen, SQ Dak.
Application May 10, 1937, Serial No. 141,635
13 Claims. _(01. 152-20)
' My invention pertains to an improved ‘ con
struction of casings for pneumatic tires for‘use
on vehicles, and wheel rims for supporting said
casings, by which the advantages below described
5
are secured}
-
'
.
My invention pertains particularly to tire cas
ings of the type known as “straight side" casings
and rims of the type known as “drop center”
rims, said casings having edge beads containing
reinforcing rings of metal which prevent enlarge
7
.'
tially the same diameter as the inner diameter
of the beads of a conventional straight side pneu
matic tire casing of the same size. The casing
of my invention is provided with edge beads’hav
ing inner diameters substantially equal‘respec- v5
' tively to the diameters of the rim seats, and the
bead of larger diameter has integrally built into
itfan emergency tread construction of somewhat
smaller external diameter than the main tread
diameter of the casing in use, the difference inv 10
these diameters being substantially equal to the
having integral edge ?anges extending outwardly normal compression of the main tread of the
from the inner diameters of the casing beads casing in traveling over roadway inequalities ordi
to hold the casing laterally on the rim; the drop narily encountered, and the diameter of the emer
' 15 center of the rim being enough smaller in diam 'gency tread being preferably as much greater 15
eter than the inner diameters of the beads, to than- the inner diameter of the smaller head, as
permit working the beads over one of the edge the saidnormalcompression of the main tread
permit. 7
'
?anges of the rim without stretching of the beads, will
Among the advantages of my improved con-,
1O
ment' and stretching of said beads, and said rims
after which the non-stretchable beads are worked
20 onto the casing supporting surfaces of the rim Y struction are
'
20
First: In the event of'de?ation of a tire while
which are of substantially the/same diametervas
in use, due, for example to a blow-out or a punc- ‘
the inner diameters of said beads.
‘Among the advantages of this type of casing ture, the drop of the wheel from themain tread
and rim construction, are the stability of the ‘to the emergency tread of the tire, is so small
25 casing beads which‘makes practically impossible that the pull on the steering wheel ‘is reduced to 25
the removal of the casing from the rim when a readily controllable amount, thereby‘ greatly
the tire is in?ated, and the impossibility of sepa
ration of therim ?anges from the rim, on account
of the rim and its ?anges constituting an inte
reducing the danger of accident;
'
Second: The greatly reduced wheel drop re
ferred to, materially reduces the tendency of skid-,
30 gral and unitary structure, which positively holds
dingof the de?ated tire;
‘
35 referred to,‘ are usually of ‘ large cross-‘section rel
' atively to the tire diameters, and'they are not
tire and rim constructionare used, thereby main-
invulnerable as to punctures and-blow-outs, and
where for any reason, a tire having a casing of
this type, is rapidly de?ated when on a vehicle
uindisturbed in the event of said de?ationv of the
40 traveling at high speed, the greatly reduced effec
tive diameter of the tire and the relatively large
stantial clearance between the smaller ?ange of
.
3Q
‘
Third: The emergency tread, being of rubber,
the casing on the rim for all conditions of use.
These advantages are important with the high ‘affords substantial frictional ‘engagement with 9.
speed operation‘ of motor vehicles which is now roadway ‘when it is brought into use, in contrast
, common. At the same time, casings of the type to the small frictional engagement of the metal ‘
rim with the roadway where the conventional 35
\,
taining the control -of the vehicle practically
t
e;
-
a
;
'
.
, Fourth: The emergency tread provides a sub- 40
the rim and the roadway, thereby not only pro
a mass of the released and‘ erratically moving de
?ated casing, constitute a serious menace to those . tecting the larger rim ?ange from .injury in‘ an
in the vehicle, and an object of the present inven
45 tion is to overcome these. di?lculties without sac
ri?cing the advantages of casings and rims of the
types referred to.
.
By my invention, I provide a rim of ‘the i‘drop‘
center” type, with two laterally spaced cylindri-_
50‘ cal bead seatspof substantially different diam
eters, the seat of larger diameter being‘preier
ably towards the vehicle on which the wheel rim
is used, that is, on the inside portion of the rim,
the other and smaller seat being on the outside
55 portion of the rim, and preferably of substanf
emergency, by ‘the action of the emergency tread,
but also protectingthe casing‘ from rim cutting, 45.
and ‘preventing injury to the smaller rim ?ange;
. Fifth: The emergency tread being solid and of
rubber, provides a surface on. which the vehicle
may safely be run at slow speed, without injury
to the casing or to the rim, thus facilitating 5o
reaching a repair station, instead of requiringthe '
vehicle‘ to be stopped at the scene of a tire de?a
tion, attended bythe disadvantage and delay in-,-‘
volved in bringing a repair man to the scene; -
Sixth: The emergency tread protects, the cas- 55
2,108,399
ing from rim cutting and the rim from injury ' || similar to that used'with said standard rims,
due tov unusual roadway projections, such as so that a non-expansible casing bead of a size
‘ poorly installed car tracks and railway crossings, _ to ?t said seat ||, may readily be worked over
when in regular use, by cushioning the unusual
impacts and preventing their being communi
cated to the rim ?anges through the unduly com
pressed tire;
the ?ange l6, into the center drop l3 and onto
the seat || against the ?ange IS in the usual
manner.
The casing 18 is provided with a main tread
Seventh :. The emergency tread affords a posi
tive indication of ‘under-in?ation of the tire, by
| 9 and edge beads 20 and 2|, said beads having
incorporated in them reinforcing rings 22 and
10 the bumping of the relatively stiff but elastic ~ 23 respectively, made of metal wire in the man
tread over usual roadway projections not
ner usual in straight-side casing construction, to
with a properly in?ated tire;
-make the beads rigid against expansion, but per
Eighth: In any case of de?ation of the tire mitting the bead 20 to be worked over the rim
while in use, and in any case of use of the emer
?ange IS in mounting the casing on the rim.
15 gency tread with the tire de?ated, and in any The bead 20 has an inner diameter ?tting the
case of abnormal and dangerous roadway pro
seat H in a manner usual'with straight-side cas
jections, the substantial diiference in diameter ings and drop-center rims, but the inner diam
of the rim seats, insures a substantial clearance eter of the bead 2| is much larger than the inner
between the‘ smaller rim ?ange and the roadway. diameter of the bead 20, and ?ts the seat l2 in
20 protecting'the casing and the inner tube of the a manner similar to the ?t of the bead 20 on its
tire from injury;
seat ||.- The bead 2| is provided with a sub
Ninth: The substantial difference in the diam
stantial enlargement extending laterally from
eters of the beads of the casing, permits perma
the inner portion of the casing, to form an emer
nently securing the larger bead and associated gency tread‘ 24, said enlargement being prefer
25 emergency tread to the larger seat of the rim, ably of rubber su?iciently resilient to cushion
without interfering with the removal of the.v usual roadway inequalities at slow speeds, and
smaller casing bead from the smaller seat of the having a depth radially which is su?lcient to pro
rim by means of the drop in the center of the tect the rim and its ?ange I], when the emer
rim, when it may be necessary to remove and gency tread is in use. The outer diameter of
30 replace an inner tube, thus. materially reducing the emergency tread 24 is enough smaller than
the time and e?ort involved in making such re
the diameter of the main tread I 9, so that the
pairs, the clearance between the casing and the . compression of the main tread by usual road in
rim with the smaller bead removed from the rim. equalities when the ca'sing is properly in?ated,
being ample toremove and insert an inner tube will not quite bring the emergency tread into en
35 andany shoes it may be desirable to use, the gagement with the roadway, and this ‘difference
support of the larger bead tending tohold the in tread diameters may, of course, be different
main tread of the casing in a position to main
for. diiferent sizes and constructions of. casings
tain said clearance during such repairs.
and the uses for which they are intended.
The above and other objects of my invention, ' The seat i2 being of relatively large diameter,
40 will be best understood,by reference to the ac
I ?nd it desirable to positively hold the bead 2|
companying drawing illustrating a preferred em
on said seat, instead of depending on the in?a
bodiment thereof, in which
tion of the tire to do so. To accomplish this, a
Fig. 1 illustrates in vertical, transverse, sec
heavy wire ring 25 is incorporated in the bead
tional view, a part of a tire casing and cooper
2| during the manufacture of the casing, the
45 ating wheel rim in accordance with my inven'—'~ ends of said heavy wire being contained in an
tion,
outer side recess 28 in the bead, which'recess isv
Fig. 2"illustrates!\in a- view similar to Fig. 1, placed in alinement with a circumferential slot
- a modi?ed means for holding the larger casing 21 through the ?ange I1, when the bead 2| is
beadon the rim,
.
'
mounted on the seat |2, to‘ give access through
50 Fig. 3 is a left hand elevation to an enlarged _ said ?ange to the ends of the ring 25, so that
scale, of a portion of the structure shown in said ring may be tightened in-any desired man
_Fig. 1,
_
ner, to hold the bead 2| tightly on its seat l2.
‘ Fig. 4 is a sectional view of a part of ,the struc
In Figs. 3 and 4, I illustrate one means that
ture shown in Fig.3, taken along the line'l-l, may be employed to tighten ‘the ring 25. As
there shown, the ends of the ring are spaced
from each other, and each end has rigidly se
Fig. 5 is an end view of the wire retaining de
and
'
a
numerals
'
refer
throughout the several views.
60
30
‘
35
40
45
i
vice shown in Fig. 4.
Similar
20
to
-
I
_
similar
parts
'
I
As shown in Fig. 1, a metal wheel rim i8, pref
erably formed from sheet metal, is provided at
its edge portions with bead seats H and I2 be
55
cured thereto, spaced ?anges 28 and 29, so that,
as shown in Fig. ‘i, the outer ?anges 28, 28 may
be engaged by the slotted jaws of a clamping
tool 38, by which the ends of the wire 25 are
forced towards each other, until a U-shaped re
taining member 3| .can be inserted at each' of
its ends between the ?anges 28, 29, and by en
. tween which the rim is provided with a center
drop l3 where the rim is securedto the outer ' gagement with the ?anges 29, 29, hold the'wire
edge portion 'of the web I‘ of the wheel in any 25 in its clamping position pressing the bead 2| 65
tightly against the seat l2, thereby permanently
65
suitable manner, for example, by rivets l5. The
seats H and ii are provided with outwardly ex
tending edge ?anges l5 and I‘! for restraining
70
casing beads on said seats, from movement lat
erally of'and away from said seats. The seat ii‘
is“ of substantially the same diameter as used
with standard drop-center} rims for straight
' side tire casings of similar diameter and cross
section to the casing illustrating my invention;
and the drop center l3 has a relation to said seat
securing the bead'2l on its seat until it is de
sired to remove the casing, which may be done
‘by ?rst removing the retaining member 3| by
means of the tool, 30. As shown in Fig.5, the 70
ends of the retaining member 3| are slotted at
3|a to passv around the wire 25 in placing the
member in position to hold the ?anges 29, 29 as
described.
‘I
In Fig. 2 I illustrate a modi?ed 'means for
3
2,108,829 ,
tion of a rim having two spaced bead seats sep- ‘
holding the larger bead of the
'
and against
on its seat arated laterally by a dropv center, one of said
the rim ?ange, consisting
of a’I ‘ sub‘
\
‘ rigidly secured thereto studs 33 extending through
seats having a diameter equal to the inner diam
eter of the cooperating tire casing, and the other
ciearance holes in the rim, the ‘outer-ends of said
studs being threaded and engaging suitable nuts
the‘ inner and outer diameters of said casing, a
*stantially ?at retaining ring 32 of metal having
of said seats ‘having ‘a diameter intermediate
straight-side tire casing having edge beads of
by which the ring 32 is securely held in place
inner diameters respectively fitting said seats,
with its outer portion pressing laterally against
the bead of the casing. With this construction,
and an emergency tread portion extending lat
erally outwardly from said casing and support; 10
10 the rim llla,‘seats Ma and I20, rim ?anges l6a
and I'Ia, the casing I81: and its beads 20a and 2la,
and its treads l?a and “a, are the‘ same re
spectively as the rim l0, seats H and I2, rim
?anges i6 and H, the casing l8 and its beads
15 20 and 2|, and its treads l9 and 24 above de
scribed in connection with Fig. 1, excepting that
the wire 25, the recess 26 and the ?ange slot 21
are omitted, and that the inner surfaces of the
rim Illa and casing l8a adjacent the seat l2a, are
recessed to receive the thickness of the retain
ing ring v32, to make the inner surface of the rim
Illa and of the casing 18a smoothly continuous
with the inner surface of, said retaining ring,
which ring, it will be understood, may either be
ed on the larger one of said seats, said rim hav
ing outwardly extending radial and integral
?anges at the outer edges of said seats.
a single member, ‘or sectional, as preferred.
The ring 32, whether a unitary member or sec
beads having therein ametal restraining ring
3. In a tire and rim‘construction, the combi
nation of a rim having two spaced bead seats
separated laterally by a drop center,_ one of said
seats having a diameter equal to the inner
diameter of the cooperating tire casing, and the
other of said seats having a diameter interme
diate the inner and outer diameters of said cas
20
ing, and a straight-side tire casing having edge
beads of inner diameters respectively ?tting said
seats, said larger bead having an enlargement
extending laterally outwardly from said casing '
to constitute an emergency tread, each of said 25
tional, is readily put in place after the bead
2la‘is mounted on the seat Ila and before the
holding said bead against expansion.
-
_
and 24a being" of rubber compound su?iciently
hard and at the same time sui?c'iently resilient
other of said seats having a diameterintermeé
4. In a tire and rim construction, the combi
nation
of a rim having two spaced bead seats
, bead 20a is placed on thevrim "la.
30
The casings l8 and Na. above described, are separated laterally by a' drop center, one of said
80
seats
having
a
diameter
equal
to
the
inner
made in‘the usual manner of layers of fabric or
cords and rubber, the tread portions I9}, 24, I91; _ diameter of the cooperating tire‘ casing, and the
to serve their intended purposes.
diate the inner and outer diameters of said cas
ing, a‘straight-side tire casing having edge beads
of inner diametersrespectively ?tting said seats,
anemergency tread portion on said'larger' seat
_
In using the‘rim and casing construction de
scribed, inner pneumatic tubes (not shown) are
employed in the usual ‘manner to lreep the casings in in?ated condition.‘
-
adjacent said larger bead, and a metal clamping .
ringin said emergency tread portion for com-'
I
From the‘construction described, it‘ will ap
pear that by ‘my invention I attain all ‘of ‘the
desirable advantages above set‘ forth, and that
45
pressing it "against its supporting seat;
40
_ _. 5. In a tire and rim construction, the com
bination of ‘a rim‘nhaving two spaced bead seats
with the casing de?ated and with the vehicle. separated laterally by a drop center, one of said
riding on the emergency tread, the de?ated con- _ seats-having a diameter equal to the inner slams
of the cooperating tire-casing, and the other
dition of the casing (illustrated in ‘dotted lines in eter
Fig. l) , results in ample‘ clearance spaces in the ofsaid seats having a diameter intermediate the
45
casing and around the smaller ?ange of the inner and outer diametersof saidcasing, and a
rim, to completely protect from ‘injury the casing. ‘ straight-side tirev casing having edge beads of
the inner tube and thesmaller ?ange of the
' inner diameters respectively ?tting said seats,
the larger rim ?ange being at that time also pro-‘ . an emergency treadportion 'on said larger-seat
adjacent said larger ‘head,’ a metal clamping ‘ring
tected against, injury by the emergency ' tread in
said emergency tread portion for compress- I
If
preferred,
the
em
‘portion of the casing.
ergency tread portion may be separate from ‘the ing it against its supporting seat, and a retain
ing member for holding said clamping ring in‘
casing and mounted on the larger-rim seat adia
55
cent the larger casing bead.
‘
'
-
'
While I have shown my invention in the par
ticular embodiment set forth, it will be under
stood that I ‘do not limit myself‘ thereto in car
rying :out my invention, as I mayemploy equiv‘
60
alentsthereof without departingv from the scope
‘of
_ what
the appended
I claim is;
claims.
.
"
, .
1. In a tire and rim construction, the combina-~
tion of a rim having ,two spaced bead seats sep
65 arated laterally by a drop center, one of said
clamping condition.;
55
I
6. In- a tire and rim construction, the com
bination of. a
having two spaced bead seats
separated laterally by a drop centenone of ,said
seats having a diameter equal to the inner diam
eter of the ‘cooperating tire casing, and the other so
of said seats having a diameter intermediate the
inner and outer diameters of said casing, and. a
straight-side tire casing having edge beads of
inner diameters respectively ?tting said ‘seats,
said larger bead having an enlargementextend»
65
ing‘ laterally outwardly from said casing to‘ con- 7
eter of the cooperating tire casing;-and the other ' stitute an emergency tread, a metal clamping
oi.’ said seats having ‘a diameter intermediate the ring in said enlargement for compressing said
seats having a diameter equal- to the inner diam
' inner and outer diameters of said casing, and
70 a straight-side tire casing having edge beads
of inner diameters respectively ?tting said seats,
said larger bead having-an enlargement extend
ing laterally outwardly from said casing to con
stitute an emergency tread.
I _
I
_:2. In a tire and rim construction, the combina
'enlargementvagainst the larger one of said seats,
and a retaining member for holding saidclamp 70
ing ring- in clamping condition, each‘ of said
beads having therein a metal restraining ring
holding said bead against expansion.
'
‘'1. In a tire and'riin construction, the com
bination of a rim having two spaced bead .‘seats 75
4
aioaaao
separated laterally by a drop center, one of said
seats having a diameter equal to the inner diam
eter of the cooperating tire casing, and the other
of said seats having a diameter intermediate the
inner and outer diameters of said casing, and a
straight~side tire casing having edge beads of
inner diameters respectively ?tting said seats,
said larger bead having an enlargement extend
ing laterally outwardly from said casing to con
10 stitute an emergency tread, a substantially ?at
ring in said casing adjacent said larger seat and
overlapping said larger bead, and studs extend
ing from said ?at ring through said rim for hold~_
ing said ?at ring against'said larger bead.
15
8. In a tire and rim construction, the com
bination of a rim having two spaced bead seats
separated laterally by a drop center, one of said
seats having a diameter equal to the inner diam
eter of the cooperating tire casing, and the other
20 of said seats having a diameter intermediate the
inner and outer diameters of said casing, and a
straight-side tire casing having edge beads of
inner diameters respectively ?tting said seats,
said larger bead having an enlargement extend
25 ing laterally outwardly from said casing to con
stitute an emergency tread, a substantially ?at
ring in said casing adjacent said larger seat and
overlapping said larger bead,‘ and studs extend
ing from said ?at ring through said rim for
'30 holding said ?at ring against said larger bead,
each- of said beads having therein a metal re
straining ring holding said bead against ex
pansion.
9. A
35
j
casing
for
,
'
pneumatic . tires
having
straight-side edge beads‘oi‘di?’erent inner diam
eters, the inner diameter of one of said beads
being the inner diameter 01' said casing and the,
inner diameter of the other of said beads being
intermediate the inner and outer diameters of 40
said casing, said larger diameter bead having an
enlargement extending laterally therefrom and
constituting an emergency tread.
"
.
.eters, the inner diameter of one of said beads
being the inner diameter of said'casing and the
inner diameterof the other of said beads being
intermediate the inner andfouter diameters of
said casing, said larger diameter bead having an'
enlargement extending laterally therefrom and
constituting an emergency tread,‘ each of said
beads having therein a metal restraining ring
holding said bead against expansion.
11. A ‘casing for pneumatic tires having 10
straight-side edge beads of different inner diam
eters, the inner diameter of one of said beads
being the inner diameter of said casing vandthe
inner diameter of the other of said beads being
intermediate the inner and outer diameters of 15
said casing, said larger diameter bead having an
enlargement extending laterally therefrom and
constituting an emergency tread, and a- metal
clamping ring in said enlargement.
12. A casing for pneumatic tires having 20
straight-side edge beads of different inner diam
eters, the inner diameter of one" of said beads
being the inner diameter of said casing and the
inner diameter of the other of said beads tbeing
intermediate the inner and outer diameters, of 25
said casing, said larger diameter bead‘ having an
enlargement extending laterally therefrom and
constituting an emergency tread, a metal clamp
ing ringvin said enlargement, and a retaining
member for holding said clamping ring in clamp 30
ing condition.
.
1
.
13. A casing for pneumatic tires having
straight-side edge beads of different inner diam‘
eters, the inner diameter of one of said beads
being the inner diameter of said casing and the
inner ‘diameter of the other of said beads being
intermediate the inner and outer diameters of
said casing, said larger diameter bead having an
enlargement extending laterally therefrom and
constituting an emergency tread, and-a metal
clamping ring in said enlargement, each of said
beads having therein a metal restraining ring
10. A casing for pneumatic tires having ' holding said bead against expansion.
straight-side edge beads o'i' di?erent inner diam
‘
BURTON D. CARTER. I
40
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