CA1084399A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- CA1084399A CA1084399A CA312,328A CA312328A CA1084399A CA 1084399 A CA1084399 A CA 1084399A CA 312328 A CA312328 A CA 312328A CA 1084399 A CA1084399 A CA 1084399A
- Authority
- CA
- Canada
- Prior art keywords
- tire
- wheel
- bead
- rim
- inches
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011324 bead Substances 0.000 claims abstract description 79
- 230000003405 preventing effect Effects 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 25
- 208000020401 Depressive disease Diseases 0.000 claims 20
- 238000000034 method Methods 0.000 claims 2
- 238000009740 moulding (composite fabrication) Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/02—Seating or securing beads on rims
- B60C15/024—Bead contour, e.g. lips, grooves, or ribs
Abstract
PNEUMATIC TIRE
ABSTRACT OF THE DISCLOSURE
A tubeless pneumatic tire having means in the lower bead portions of the tire for preventing the tire from being inflated when the tire is mounted on a wheel having a rim diameter smaller than for which it was designed.
ABSTRACT OF THE DISCLOSURE
A tubeless pneumatic tire having means in the lower bead portions of the tire for preventing the tire from being inflated when the tire is mounted on a wheel having a rim diameter smaller than for which it was designed.
Description
~ 3 Back~round ~C 3~ CI
This invantion relates to a pneumatic tire and~
more particularly~ to a tublesss pneumatic tire having means for preventing air retention when the tire is mounted on a wheel having a rim diamlter smaller than that ~or which it was designed.
Pneumatic tirss come in a variety of sizes and are generally designed to be used with a particular wheel size.
When a tire is mounted and infla-ted on the size wheel for which it was designed~ the bead portions of the tire engage the bead seats and rim flanges o~ the ~heel in a secure manner~ forming arL airtight seal between the bead portlon of the tire and the bead seat of the rim. Proper bead seating is essential in a tubeless-type tire Prom the standpoint of tire performance and safety of the occupants of a vehicle on which the tires are mounted~
With the large selection of tubeless tire and wheel sizes9 there egists the possibility that a tire may be incorre¢tly mounted on a wheel having a ri~ diameter-slightly smaller than that for which it was designed.
Although the bead portions o~ the tire will not properly seal~ in~lation o~ the tire may occur due to the sealing engagement of the axial outer sur~ace of the bead portions of the tire with the flanges of the rim. Howe~er~ this type of sealing engagement is insecure and may lead to premature faillLre o~ the tire~ thus~ causing possibly in~ury to the occupants o* the vehicle and/or damage to the tire itself. This type o* mismounting is~ o~ course~
limlted to wheels having a rim diameter smaller than that ~ ~ . .
-:~84399 for which the -tire was designed, bu-t large enough to permi-t sealing be-tween -the rim flange and side of the bead portion of the tire.
According -to one aspect of the presen-t invention, there is provided a tubeless pneumatic tire comprising:
a pair of bead portions having a plurality of circum-ferentially spaced ribs ~or preven-ting sealing engage-ment of said -tire when mounted on a wheel having a rim diameter smaller than the diameter of the wheel onto which the -tire was designed to be used with by providing a plurality of air passages for escape of inflation pressure, said ribs extend substantially radially out-ward with respect to the axis of said tire along the exterior surface of the lower part of each o~ said bead portions starting from approximately the nominal rim diameter o~ said tire such that when said tire is mounted on wheel for which it is designed for use and the tire ; is in~lated to normal inflation pressures said ribs at least in part will be in abutting relationship with the axial inward surfaces of the flanges of said rim, the toe bead surface of said tire forms an angle from about 10 to 20 with respect to a line parallel to ~ the rotational axis o~ said tire.
- In accordance with another aspect of the present invention, there is provided a me-thod o~ preventing a tire having a given bead diameter designed ~or operative mounting on a first wheel o~ a firs-t rim diameter from being operatively mounted on a second wheel of a second rim diameter less than said ~irst wheel of said ~irst rim diameter by preventing the exterior sur~ace of the ~3 ~,; -:;.` ~
~.. . .
:; ~, " , .
. . . .. .
~- . . ..
~ 39 bead por~tion of said -tire from ~orming a sealing relationship with the flanges o~ said second wheel by permi-t-ting leakage of inflation air between said tire and said second wheel comprising: providing on the exterior surface of said lower bead portion of said tire a plurality o~ circumferen-tially spaced projections or depression.s which e~tend substantially radially outwardly with respect to the axis o~ the tire starting from approximately nominal rim diameter . .
of said tire, said projections or depressions form ,-a plurality of air passages when mounted on said second wheel permitting leakage o~ infla-tion air.
thereby preventing said,tire from forming a sealing '.
,. engagement with said second wheel; ' further prw iding means for preventing air flow ,~
from the internal cavity o~ said tire and from formlng `' an air sealing relationship with said bead seat portions of said first wheel when said tire is operatively ~ :
mounted thereon, said second means being located in the radially innermost portion of said bead portion ~' and belng located radially inward and axially in~ard ~, -of said projections and depressions.
.
: , Descr ption of the Drawings Fig. 1 is a fragmentary transverse sectional view showing the preferred embodiment of the invention mounted on a wheel having the correct rim diameter size for which it was designed;
, . Fig. 2 is a fragmentary side view o~ a tire made in accordance with the present invention taken along -~a-, .
:.. .: ~ ,. :
,~
-. .- . - -- ~ .
~89~399 line 2-2 o~ Fig. l;
Fig. 3 is a cross-sec-tional view of a tire made in accordance wi-th the presen-t invention taken along line 3-3 of Fig. 2;
: Fig. 4 is a fragment;ary, transverse sectionalview of a tire according to the pre~erred embodiment o~ the present invent on mounted on a wheel having a rim diameter smaller than that for which it was de-signed; and .` ~-~ - :`'' .
,~
:: ' -~ 3~ g Fig. 5 is a fragmentary cross-sectional view simllar to that o~ Fig. 3 illustrating a modifie~ form of the present invention~
Referring to Fig. 1~ there is illustrated a tire 10 made in accordance with the present in~ention mounted on a wheel having a rim 12 for which it was deslgned~ The rim 12 comprises a pair of axially spacad flanges 14~ 16 which extend annularly around the wheel. The radially inner ends of the flanges 14~ 16 merge into a pa~r of bead seats 18~ 20~ respectively. The rim 12 further comprises an annular wheel-portion 22 spaced axially inwardly from the bead seats 18~ 20.
The tire 10 is provided with bead portions 26~ 28 such that when the tire is mounted on a wheel 12 for which it was designed~ the bead portlons 263 28 are in buttlng ;~
relationship with flanges 14~ 16~ respectivel~ the toe portions 27~ 29 of the tire 10 forming an alrtight seallng ralationship with bead seats 18; 20~ respectivslyO The tire 10 is of the tubeless typa and may be of a radial or bias ply constructions.
The exterior surface of bead portions 26, 28 is provided with a plurality of radially extonding projections or deprassions which extend Xrom the lower portion of bead portions 26~ 28 radially outward along the ext~rior side-wall surface of tire 10. Reforring to Flgs. 1 through the preferred embodiment of the present invantion is provided with a plurality of ribs 30~ The radially inner end 32 of ribs 30 start at a point on bead portions 26~ 28 -~
.~ . .
391g such that the tire 10 when mounted on a wheel having a rim diameter smaller than that for which it was designed (as shown in E'ig. ~) will prevent inflation of the tire.
In particular, the present invention is designed to prevent inflation o~ a tire on a rim diameter which is approxi-mately 1/~ of an inch (6.248 mm) to 3/4 of an ihch (19.05 mm) less in diameter than that for which the tire was designed to be used with. The ribs 30 should not extend radially inward as to interfere with proper bead seating and sealing of the tire on the rim fo~ wh~ch it was designed (as illustrated in Fig. 1). Preferably7 the ribs 30 do not extend radially inward of the bead heel sharp point.
Tha radially outer end 34 of ribs 30 may extend to any point desired along the exterior surface of the tire.
The end 3~ should extend radially outward a distance so that the ribs will prevent the exterior surface of the lower bead portion of the tire from sealing with the rim ~langes of the rim. The exterior surface o~ the tire 10 in betweenithe ribs 30 should be free of any substantially circumferentially extending projection or projections.
The number of projectlons or depressions necessary will vary upon the size of the tire and the cross-sectional c~nfiguration and size of the projections or depressions.
There should be a sufficient number of projections or depressions to prevent the bead portions 26~ 28 from form- -ing a sealing engagement with fl~nges 14~ 16.
In the particular tire illustrated in Figs. 1 through 3~ the ribs 30 are circumferentially spaced approximately - ...~ . , : . ' .
~ 3 ~
an inch apart~ are semi-circ~lar in cross-sectional configuration and extend from a point radially outward from the nominal rim diamete;r NRD of the tire a distance equal to approximately 0.5 inches (12.7 mm) and extends radially outward along the exterior sur~ace of the tire 10 a distance equal to about 0.5 inches (12.7 mm). The ribs 30 have a width W, and a height H, equal to approximately 0.030 inches (0.762 mm). Various other sizes and configurations may be used so long as they do not interfere with proper bead seating.
The tire bead toe surfaces 31, 33 when in the mold in which it is cured form an angle from about 10 to 20~
pre~erably 15 with a line parallel to the rotational axis of the tire 10.
The bead sea-ts 18, 20 of wheel 12 for which the tire 10 was designed are inclined outwardly and typicall~ have an angle of a few degrees~ that is, from about 2 to 10~
preferably about 5~ as measured between a plane parallel to the rotational axis of the tire 10 and passing along th~ surface of the bead seats.
Referring to Fig. 4~ there is illustrated a tire 10 made in accordance with the present invention mounted on a wheel 13 having a rim diameter less than the rim for which it was designed.
For the purpose of clarity~ only one hal~ of the wheel 13 is illustrated~ the other half not shown being identical to the axial end shown. It should therefore be understood all that is said with respect to the half illustrated applies equally to the half not shown. The flange 15 ~ . , . .
'~ 8 ~3~
extends annularly around the wheel 13~ the radially inner end merging into a bead seat 19. The radial height of flange 15 of wheel 13 is such that the radially outermost point extends radlally outward from the axis of the wheel 13 a distance equal to about the distance in which the radially outermost point of flanges 1~, 16 of wheel 12 extend from its respective axis.
Ribs 30 prevent the bead portions 26, 2& of the tire 10 from formlng a sealing engagement with flange 15 of the wheel 13 by allowing air to escape from the internal cavity of the tire 10 outward along the exterior part of tire 10 to the atmostphere~ as is indicated by the arrows in Fig. ~
Referring to Fig. 5, there is illustrated an 1~ alternate embodiment of the present invention. In place of the ribs 30 shown in Fig. 3~ grooves ~0 are provided in the lower bead portion to prevent the tire from forming a sealing engagement with flanges 1~ 16. The grooves 40 start from the same lower limits as ribs 30 and extend radially outward along the surface of the tire 10 termin-ating in the same manner as ribs 30. The grooves 40 have the same width W and height H as grooves 30.
- While certain representative embodiments and details have been shown for the purpose of illustrating the inven--25 tion~ lt will be apparent to those skilled in this art that various changes and modifications may be made therein without departing from the spirit or scope of the invention.
. :~
.. . .
~.. ~. ., . :
- ~ . . . : . .:
This invantion relates to a pneumatic tire and~
more particularly~ to a tublesss pneumatic tire having means for preventing air retention when the tire is mounted on a wheel having a rim diamlter smaller than that ~or which it was designed.
Pneumatic tirss come in a variety of sizes and are generally designed to be used with a particular wheel size.
When a tire is mounted and infla-ted on the size wheel for which it was designed~ the bead portions of the tire engage the bead seats and rim flanges o~ the ~heel in a secure manner~ forming arL airtight seal between the bead portlon of the tire and the bead seat of the rim. Proper bead seating is essential in a tubeless-type tire Prom the standpoint of tire performance and safety of the occupants of a vehicle on which the tires are mounted~
With the large selection of tubeless tire and wheel sizes9 there egists the possibility that a tire may be incorre¢tly mounted on a wheel having a ri~ diameter-slightly smaller than that for which it was designed.
Although the bead portions o~ the tire will not properly seal~ in~lation o~ the tire may occur due to the sealing engagement of the axial outer sur~ace of the bead portions of the tire with the flanges of the rim. Howe~er~ this type of sealing engagement is insecure and may lead to premature faillLre o~ the tire~ thus~ causing possibly in~ury to the occupants o* the vehicle and/or damage to the tire itself. This type o* mismounting is~ o~ course~
limlted to wheels having a rim diameter smaller than that ~ ~ . .
-:~84399 for which the -tire was designed, bu-t large enough to permi-t sealing be-tween -the rim flange and side of the bead portion of the tire.
According -to one aspect of the presen-t invention, there is provided a tubeless pneumatic tire comprising:
a pair of bead portions having a plurality of circum-ferentially spaced ribs ~or preven-ting sealing engage-ment of said -tire when mounted on a wheel having a rim diameter smaller than the diameter of the wheel onto which the -tire was designed to be used with by providing a plurality of air passages for escape of inflation pressure, said ribs extend substantially radially out-ward with respect to the axis of said tire along the exterior surface of the lower part of each o~ said bead portions starting from approximately the nominal rim diameter o~ said tire such that when said tire is mounted on wheel for which it is designed for use and the tire ; is in~lated to normal inflation pressures said ribs at least in part will be in abutting relationship with the axial inward surfaces of the flanges of said rim, the toe bead surface of said tire forms an angle from about 10 to 20 with respect to a line parallel to ~ the rotational axis o~ said tire.
- In accordance with another aspect of the present invention, there is provided a me-thod o~ preventing a tire having a given bead diameter designed ~or operative mounting on a first wheel o~ a firs-t rim diameter from being operatively mounted on a second wheel of a second rim diameter less than said ~irst wheel of said ~irst rim diameter by preventing the exterior sur~ace of the ~3 ~,; -:;.` ~
~.. . .
:; ~, " , .
. . . .. .
~- . . ..
~ 39 bead por~tion of said -tire from ~orming a sealing relationship with the flanges o~ said second wheel by permi-t-ting leakage of inflation air between said tire and said second wheel comprising: providing on the exterior surface of said lower bead portion of said tire a plurality o~ circumferen-tially spaced projections or depression.s which e~tend substantially radially outwardly with respect to the axis o~ the tire starting from approximately nominal rim diameter . .
of said tire, said projections or depressions form ,-a plurality of air passages when mounted on said second wheel permitting leakage o~ infla-tion air.
thereby preventing said,tire from forming a sealing '.
,. engagement with said second wheel; ' further prw iding means for preventing air flow ,~
from the internal cavity o~ said tire and from formlng `' an air sealing relationship with said bead seat portions of said first wheel when said tire is operatively ~ :
mounted thereon, said second means being located in the radially innermost portion of said bead portion ~' and belng located radially inward and axially in~ard ~, -of said projections and depressions.
.
: , Descr ption of the Drawings Fig. 1 is a fragmentary transverse sectional view showing the preferred embodiment of the invention mounted on a wheel having the correct rim diameter size for which it was designed;
, . Fig. 2 is a fragmentary side view o~ a tire made in accordance with the present invention taken along -~a-, .
:.. .: ~ ,. :
,~
-. .- . - -- ~ .
~89~399 line 2-2 o~ Fig. l;
Fig. 3 is a cross-sec-tional view of a tire made in accordance wi-th the presen-t invention taken along line 3-3 of Fig. 2;
: Fig. 4 is a fragment;ary, transverse sectionalview of a tire according to the pre~erred embodiment o~ the present invent on mounted on a wheel having a rim diameter smaller than that for which it was de-signed; and .` ~-~ - :`'' .
,~
:: ' -~ 3~ g Fig. 5 is a fragmentary cross-sectional view simllar to that o~ Fig. 3 illustrating a modifie~ form of the present invention~
Referring to Fig. 1~ there is illustrated a tire 10 made in accordance with the present in~ention mounted on a wheel having a rim 12 for which it was deslgned~ The rim 12 comprises a pair of axially spacad flanges 14~ 16 which extend annularly around the wheel. The radially inner ends of the flanges 14~ 16 merge into a pa~r of bead seats 18~ 20~ respectively. The rim 12 further comprises an annular wheel-portion 22 spaced axially inwardly from the bead seats 18~ 20.
The tire 10 is provided with bead portions 26~ 28 such that when the tire is mounted on a wheel 12 for which it was designed~ the bead portlons 263 28 are in buttlng ;~
relationship with flanges 14~ 16~ respectivel~ the toe portions 27~ 29 of the tire 10 forming an alrtight seallng ralationship with bead seats 18; 20~ respectivslyO The tire 10 is of the tubeless typa and may be of a radial or bias ply constructions.
The exterior surface of bead portions 26, 28 is provided with a plurality of radially extonding projections or deprassions which extend Xrom the lower portion of bead portions 26~ 28 radially outward along the ext~rior side-wall surface of tire 10. Reforring to Flgs. 1 through the preferred embodiment of the present invantion is provided with a plurality of ribs 30~ The radially inner end 32 of ribs 30 start at a point on bead portions 26~ 28 -~
.~ . .
391g such that the tire 10 when mounted on a wheel having a rim diameter smaller than that for which it was designed (as shown in E'ig. ~) will prevent inflation of the tire.
In particular, the present invention is designed to prevent inflation o~ a tire on a rim diameter which is approxi-mately 1/~ of an inch (6.248 mm) to 3/4 of an ihch (19.05 mm) less in diameter than that for which the tire was designed to be used with. The ribs 30 should not extend radially inward as to interfere with proper bead seating and sealing of the tire on the rim fo~ wh~ch it was designed (as illustrated in Fig. 1). Preferably7 the ribs 30 do not extend radially inward of the bead heel sharp point.
Tha radially outer end 34 of ribs 30 may extend to any point desired along the exterior surface of the tire.
The end 3~ should extend radially outward a distance so that the ribs will prevent the exterior surface of the lower bead portion of the tire from sealing with the rim ~langes of the rim. The exterior surface o~ the tire 10 in betweenithe ribs 30 should be free of any substantially circumferentially extending projection or projections.
The number of projectlons or depressions necessary will vary upon the size of the tire and the cross-sectional c~nfiguration and size of the projections or depressions.
There should be a sufficient number of projections or depressions to prevent the bead portions 26~ 28 from form- -ing a sealing engagement with fl~nges 14~ 16.
In the particular tire illustrated in Figs. 1 through 3~ the ribs 30 are circumferentially spaced approximately - ...~ . , : . ' .
~ 3 ~
an inch apart~ are semi-circ~lar in cross-sectional configuration and extend from a point radially outward from the nominal rim diamete;r NRD of the tire a distance equal to approximately 0.5 inches (12.7 mm) and extends radially outward along the exterior sur~ace of the tire 10 a distance equal to about 0.5 inches (12.7 mm). The ribs 30 have a width W, and a height H, equal to approximately 0.030 inches (0.762 mm). Various other sizes and configurations may be used so long as they do not interfere with proper bead seating.
The tire bead toe surfaces 31, 33 when in the mold in which it is cured form an angle from about 10 to 20~
pre~erably 15 with a line parallel to the rotational axis of the tire 10.
The bead sea-ts 18, 20 of wheel 12 for which the tire 10 was designed are inclined outwardly and typicall~ have an angle of a few degrees~ that is, from about 2 to 10~
preferably about 5~ as measured between a plane parallel to the rotational axis of the tire 10 and passing along th~ surface of the bead seats.
Referring to Fig. 4~ there is illustrated a tire 10 made in accordance with the present invention mounted on a wheel 13 having a rim diameter less than the rim for which it was designed.
For the purpose of clarity~ only one hal~ of the wheel 13 is illustrated~ the other half not shown being identical to the axial end shown. It should therefore be understood all that is said with respect to the half illustrated applies equally to the half not shown. The flange 15 ~ . , . .
'~ 8 ~3~
extends annularly around the wheel 13~ the radially inner end merging into a bead seat 19. The radial height of flange 15 of wheel 13 is such that the radially outermost point extends radlally outward from the axis of the wheel 13 a distance equal to about the distance in which the radially outermost point of flanges 1~, 16 of wheel 12 extend from its respective axis.
Ribs 30 prevent the bead portions 26, 2& of the tire 10 from formlng a sealing engagement with flange 15 of the wheel 13 by allowing air to escape from the internal cavity of the tire 10 outward along the exterior part of tire 10 to the atmostphere~ as is indicated by the arrows in Fig. ~
Referring to Fig. 5, there is illustrated an 1~ alternate embodiment of the present invention. In place of the ribs 30 shown in Fig. 3~ grooves ~0 are provided in the lower bead portion to prevent the tire from forming a sealing engagement with flanges 1~ 16. The grooves 40 start from the same lower limits as ribs 30 and extend radially outward along the surface of the tire 10 termin-ating in the same manner as ribs 30. The grooves 40 have the same width W and height H as grooves 30.
- While certain representative embodiments and details have been shown for the purpose of illustrating the inven--25 tion~ lt will be apparent to those skilled in this art that various changes and modifications may be made therein without departing from the spirit or scope of the invention.
. :~
.. . .
~.. ~. ., . :
- ~ . . . : . .:
Claims (30)
1. A tubeless pneumatic tire comprising: a pair of bead portions having a plurality of circumferentially spaced ribs for preventing sealing engagement of said tire when mounted on a wheel having a rim diameter smaller than the diameter of the wheel onto which the tire was designed to be used with by providing a plu-rality of air passages for escape of inflation pressure, said ribs extend substantially radially outward with respect to the axis of said tire along the exterior surface of the lower part of each of said bead portions starting from approximately the nominal rim diameter of said tire such that when said tire is mounted on wheel for which it is designed for use and the tire is inflated to normal inflation pressures said ribs at least in part will be in abutting relationship with the axial inward surfaces of the flanges of said rim, the toe bead surface of said tire forms an angle from about 10° to 20° with respect to a line parallel to the rotational axis of said tire.
2. A tire according to claim 1 wherein said ribs are spaced approximately 1 inch (25.4 mm) apart.
3. A tire according to claim 1 wherein said ribs start at a point spaced a distance radially outward from said tire nominal rim diameter of approximately 0.5 inches (12.7 mm).
4. A tire according to claim 1 wherein said ribs have a width of about 0.030 inches (0.762 mm).
5. A tire according to claim 1 wherein said ribs have a thickness of about 0.030 inches (0.762 mm).
6. A -tire according to claim 1 wherein said ribs extend along the exterior of said tire a distance of about 0.5 inches (12.7 mm).
7. A tubeless pneumatic tire having a pair of bead portions designed for operative mounting on a first wheel having a first rim diameter and a pair of flanges each having a first outer diameter, the bead toe surface of each of said bead portions form an angle from about 10° to 20° with respect to a line parallel to the rotational axis of said tire, the -tire comprising:
a first means for preventing operative mounting of said tire on a second wheel of a second rim diameter by preventing the exterior surface of said bead portions of said tire from forming an air-sealing relationship with the flanges of said second wheel by providing a plurality of air passages for the escape of inflation pressure between said tire and said second wheel, said second wheel having a pair of rim flanges each having a second outer diameter equal to about said first outer diameter of said pair of rim flanges of said first -wheel, said second rim diameter being less than said first rim diameter from about 1/4 inch (6.35 mm) to about 3/4 inch (19.05 mm), said first means comprising a plurality of projections or depressions on the exterior surface of the lower bead portion of said tire, said projections or depressions being spaced apart the circumference of said tire and extend substantially radially outwardly starting from approximately tire nominal rim diameter, said projection or depression being spaced circumferentially apart approximately one inch (25.4 mm) and have a width of approximately 0.030 inches (0.762 mm) and a height "or depth" of about 0.30 inches (0.762 mm) and a length of about 0.5 inches (12.7 mm) and having a substantially semi-circular cross-sectional configuration;
a second means for preventing air flow from the internal cavity of said tire and for forming an air-sealing relationship with the bead portion of said tire with said first wheel when operatively mounted thereon, said second means being located in a radially innermost portion of said bead portion and being located radially inward and axially inward of said first means on each respective bead portion.
a first means for preventing operative mounting of said tire on a second wheel of a second rim diameter by preventing the exterior surface of said bead portions of said tire from forming an air-sealing relationship with the flanges of said second wheel by providing a plurality of air passages for the escape of inflation pressure between said tire and said second wheel, said second wheel having a pair of rim flanges each having a second outer diameter equal to about said first outer diameter of said pair of rim flanges of said first -wheel, said second rim diameter being less than said first rim diameter from about 1/4 inch (6.35 mm) to about 3/4 inch (19.05 mm), said first means comprising a plurality of projections or depressions on the exterior surface of the lower bead portion of said tire, said projections or depressions being spaced apart the circumference of said tire and extend substantially radially outwardly starting from approximately tire nominal rim diameter, said projection or depression being spaced circumferentially apart approximately one inch (25.4 mm) and have a width of approximately 0.030 inches (0.762 mm) and a height "or depth" of about 0.30 inches (0.762 mm) and a length of about 0.5 inches (12.7 mm) and having a substantially semi-circular cross-sectional configuration;
a second means for preventing air flow from the internal cavity of said tire and for forming an air-sealing relationship with the bead portion of said tire with said first wheel when operatively mounted thereon, said second means being located in a radially innermost portion of said bead portion and being located radially inward and axially inward of said first means on each respective bead portion.
8. A tire according to claim 7 wherein the bead toe surface of said tire when in the mold in which it is cured forms an angle of about 15°.
9. A tubeless pneumatic tire comprising a pair of bead portions having a plurality of circumferentially spaced grooves for preventing sealing engagement of said tire when mounted on a wheel having a rim diameter smaller than the diameter onto which the tire was de-signed to be used by providing a plurality of air passages for escape of inflation air, said grooves extend substantially radially outward with respect to the axis of said tire along the exterior surface of the lower part of each of said bead portions starting from about the nominal rim diameter of said tire such that when said tire is mounted on a wheel for which it is designed for use said grooves at least in part are axially adjacent the axially inward surface of the flanges of said rim, the toe bead surface of said tire forming an angle from about 10° to 20' with re-spect to a line parallel to the rotational axis of said tire.
10. A tire according to claim 9 wherein said grooves are spaced approximately 1 inch (25.4 mm) apart.
11. A tire according to claim 9 wherein said grooves start at a point spaced a distance radially outward from said tire nominal rim diameter of approxi-mately 0.5 inches (12.7 mm).
12. A tire according to claim 9 wherein said grooves have a width of about 0.030 inches (0.762 mm).
13. A tire according to claim 9 where m said grooves have a thickness of about 0.030 inches (0.762 mm).
14. A tire according to claim 9 wherein said grooves extend along the exterior of said tire a dis-tance of about 0.5 inches (12.7 mm).
15. A tire according to claim 9 wherein the bead toe surface of said tire when in the mold in which it is cured forms an angle of about 15°.
16. A tubeless pneumatic tire having a pair of bead portions designed for operative mounting on a first wheel having a first rim diameter and a pair of rim flanges each having a first outer diameter, the bead toe surface of each of said bead portions form an angle from about 10° to 20° with respect to a line parallel to the rotational axis of said tire, said bead portion having a first means for preventing operative mounting of said tire on a second wheel of a second rim diameter by preventing the exterior sur-face of said bead portions of said tire from forming an air-sealing relationship with the flanges of said second wheel by providing a plurality of air passages for the escape of inflation pressure between said tire and said second wheel, said second wheel having a pair of rim flanges each having a second outer diameter equal to about said first outer diameter of said pair of rim flanges of said first wheel, said second rim diameter being less than said first rim diameter from about 1/4 inch (6.35 mm) to about 3/4 inch (19.05 mm), said first means comprising a plurality of projections or depressions on the exterior surface of the lower bead portion of said tire, said projections or depressions being spaced apart the circumference of said tire and extend substantially radially outwardly starting from approximately tire nominal rim diameter;
a second means for preventing air flow from the internal cavity of said tire and for forming an air-sealing relationship with the bead portion of said tire with said first wheel when operatively mounted thereon, said second means being located in a radially inner-most portion of said bead portion and being located radially inward and axially inward of said first means on each respective bead portion.
a second means for preventing air flow from the internal cavity of said tire and for forming an air-sealing relationship with the bead portion of said tire with said first wheel when operatively mounted thereon, said second means being located in a radially inner-most portion of said bead portion and being located radially inward and axially inward of said first means on each respective bead portion.
17. A tubeless pneumatic tire according to claim 16 wherein said second rim diameter being less than said first rim diameter from about 1/4 inch (6.35 mm) to about 3/4 inch (19.05 mm).
18. A tubeless pneumatic tire according to claim 16 wherein said projections and depressions are being spaced apart approximately 1 inch (24.4 mm) and have a width of about 0.030 inches (0.762 mm) and a height of about 0.030 inches (0.762 mm) and a length of about 0.5 inches (12.7 mm) and having a semi-circular cross-sectional configuration.
19. A tubeless pneumatic tire according to claim 16 wherein said second means being located in the radially innermost portion of said bead portion and being located radially inwardly and axially inwardly of said first means of each respective bead portion.
20. A tubeless pneumatic tire according to claim 16 wherein said pair of rim flanges each have a second outer diameter equal to about said first outer diameter of said pair of rim flanges of said first wheel.
21. The tire according to claim 16 wherein the bead toe surface of said tire when in the mold in which it is cured forms an angle of about 15°.
22. A tubeless pneumatic tire comprising:
a pair of bead portions having a plurality of circumferentially spaced projections or depressions for preventing sealing engagement of said tire when mounted on a wheel having a rim diameter smaller than the diameter of the wheel onto which the tire was designed to be used with by providing a plurality of air passages for escape of inflation pressure, said projections or depressions extend substantially radially outwardly with respect to the axis of said tire along the exterior surface of the lower part of each of said bead portions starting from approximately the nominal rim diameter of said tire such that when said tire is mounted on a wheel for which it is designed for use and the tire is inflated to normal inflation pressures said projections or depressions at least in part being axially adjacent the axially inward surface of the flanges of said rim, the toe bead surface of said tire forms an angle from about 10° to 20° with respect to a line parallel to the rotational axis of said tire.
a pair of bead portions having a plurality of circumferentially spaced projections or depressions for preventing sealing engagement of said tire when mounted on a wheel having a rim diameter smaller than the diameter of the wheel onto which the tire was designed to be used with by providing a plurality of air passages for escape of inflation pressure, said projections or depressions extend substantially radially outwardly with respect to the axis of said tire along the exterior surface of the lower part of each of said bead portions starting from approximately the nominal rim diameter of said tire such that when said tire is mounted on a wheel for which it is designed for use and the tire is inflated to normal inflation pressures said projections or depressions at least in part being axially adjacent the axially inward surface of the flanges of said rim, the toe bead surface of said tire forms an angle from about 10° to 20° with respect to a line parallel to the rotational axis of said tire.
23. The tire according to claim 22 wherein said projections or depressions are spaced approximately 1 inch (25.4 mm) apart.
24. The tire according to claim 22 wherein said projections or depressions start at a point spaced a distance radially outward from said tire nominal rim diameter approximately 0.5 inches (12.7 mm).
25. The tire according to claim 22 wherein said projections or depressions have a width of about 0.030 inches (0.762 mm).
26. The tire according to claim 22 wherein said projections or depressions have a thickness of about 0.030 inches (0.762 mm).
27. The tire according to claim 22 wherein said projections or depressions extend along the exterior of said tire a distance of about 0.5 inches (12.7 mm).
28. The tire according to claim 22 wherein -the bead toe surface of said tire when in the mold in which it is cured forms an angle of about 15°.
29. A method of preventing a tire having a given bead diameter designed for operative mounting on a first wheel of a first rim diameter from being operatively mounted on a second wheel of a second rim diameter less than said first wheel of said first rim diameter by preventing the exterior surface of the bead portion of said tire from forming a sealing relationship with the flanges of said second wheel by permitting leakage of inflation air between said tire and said second wheel comprising: providing on the exterior surface of said lower bead portion of said tire a plurality of circum-ferentially spaced projections or depressions which extend substantially radially outwardly with respect to the axis o. the tire starting from approximately nominal rim diameter of said tire, said projections or depres-sions form a plurality of air passages when mounted on said second wheel permitting leakage of inflation air thereby preventing said tire from forming a sealing engagement with said second wheel;
further providing means for preventing air flow from the internal cavity of said tire and from forming an air sealing relationship with said bead seat portions of said first wheel when said tire is operatively mounted thereon, said second means being located in the radially innermost portion of said bead portion and being located radially inward and axially inward of said projections and depressions.
further providing means for preventing air flow from the internal cavity of said tire and from forming an air sealing relationship with said bead seat portions of said first wheel when said tire is operatively mounted thereon, said second means being located in the radially innermost portion of said bead portion and being located radially inward and axially inward of said projections and depressions.
30. A method of preventing a tire having a given bead diameter designed for operative mounting on the first wheel of the first rim diameter from being operatively mounted on a second wheel of a second rim diameter less than said first wheel of said first rim diameter by preventing the exterior surface of the bead portion of said tire from forming a sealing relationship with the flanges of said second wheel by permitting leakage of inflation air between said tire and said second wheel comprising: providing on the exterior surface of said lower bead portion of said tire a plurality of circumferentially spaced projections or depressions which extend substantially radially out-wardly with respect to the axis of the tire starting from a point spaced radially outward from the tire rim diameter a distance of about 0.5 inches (12.7 mm), said projections or depressions being spaced apart approxi-mately 1 inch (25.4 mm) and have a width of about 0.030 inches (0.762 mm), a length of about 0.5 inches (12.7 mm), and a height or depth of about 0.030 inches (0.762 mm) and a semi-circular cross-sectional configu-ration, said projections or depressions form a plurality of air passages when mounted on said second wheel per-mitting leakage of inflation air thereby preventing said tire from forming a sealing engagement with said second wheel; further providing in the radially inner-most portion of said bead portions of said tire and radially inward of said projections or depressions means for preventing air flow from the internal cavity of said tire and for forming an air sealing relationship with said bead seat portions of said first wheel when said tire is operatively mounted thereon, said second means being located in the radially innermost portion of said bead portion and being located radially inward and axially inward of said first projections or de-pressions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85368577A | 1977-11-21 | 1977-11-21 | |
| US853,685 | 1977-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1084399A true CA1084399A (en) | 1980-08-26 |
Family
ID=25316653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA312,328A Expired CA1084399A (en) | 1977-11-21 | 1978-09-28 | Pneumatic tire |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5857321B2 (en) |
| BR (1) | BR7807462A (en) |
| CA (1) | CA1084399A (en) |
| DE (1) | DE2850973A1 (en) |
| FR (1) | FR2409163A1 (en) |
| GB (1) | GB2008504B (en) |
| IT (1) | IT1101113B (en) |
| LU (1) | LU80520A1 (en) |
| MX (1) | MX146794A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU80688A1 (en) * | 1977-12-23 | 1979-04-13 | Dunlop Ltd | TIRE IMPROVEMENTS |
| JPS5751926Y2 (en) * | 1978-11-29 | 1982-11-12 | ||
| ZA806046B (en) * | 1979-10-20 | 1981-10-28 | Dunlop Ltd | Tyre and wheel assemblies |
| IN155019B (en) * | 1979-12-06 | 1984-12-22 | Dunlop Ltd | |
| JPS59149802A (en) * | 1983-02-12 | 1984-08-27 | Sumitomo Rubber Ind Ltd | Tyre for heavyduty truck having improved durability |
| JP2667765B2 (en) * | 1991-08-09 | 1997-10-27 | 住友ゴム工業株式会社 | Pneumatic tire |
| US5660655A (en) * | 1991-08-09 | 1997-08-26 | Sumitomo Rubber Industries, Ltd. | Tire and rim combination with exhaust ribs in tire bead |
| KR100493660B1 (en) * | 2000-11-23 | 2005-06-03 | 한국타이어 주식회사 | Heavy duty pneumatic radial tire |
| US8286680B2 (en) | 2009-04-28 | 2012-10-16 | Bridgestone Americas Tire Operations, Llc | Tire with circumferential grooves in the bead region |
| JP6298348B2 (en) * | 2014-04-22 | 2018-03-20 | 住友ゴム工業株式会社 | Pneumatic tire |
| US10974543B2 (en) * | 2018-04-17 | 2021-04-13 | Custom Wheel House, LLC | Vehicle wheel having barbed bead seat |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2007825A (en) * | 1931-09-04 | 1935-07-09 | Wingfoot Corp | Vented rubber article |
| US2047858A (en) * | 1931-09-04 | 1936-07-14 | Wingfoot Corp | Vented rubber article |
| FR957217A (en) * | 1946-12-14 | 1950-02-17 | ||
| BE541211A (en) * | 1955-02-07 | |||
| GB785094A (en) * | 1955-02-07 | 1957-10-23 | Pirelli | Improvements relating to pneumatic vehicle wheel tyres of the tubeless type |
| BE550658A (en) * | 1955-08-30 | |||
| GB814403A (en) * | 1956-02-22 | 1959-06-03 | Dunlop Rubber Co | Tubeless type and rim assembly |
| US3203461A (en) * | 1963-04-03 | 1965-08-31 | Goodyear Tire & Rubber | Tire containing vibration dampers |
| JPS5232803B2 (en) * | 1972-08-15 | 1977-08-24 | ||
| US3882919A (en) * | 1973-12-13 | 1975-05-13 | Caterpillar Tractor Co | Safety rim |
| JPS5232803U (en) * | 1975-08-30 | 1977-03-08 |
-
1978
- 1978-09-28 CA CA312,328A patent/CA1084399A/en not_active Expired
- 1978-11-07 FR FR7831416A patent/FR2409163A1/en active Granted
- 1978-11-08 MX MX175520A patent/MX146794A/en unknown
- 1978-11-14 BR BR7807462A patent/BR7807462A/en unknown
- 1978-11-15 LU LU80520A patent/LU80520A1/en unknown
- 1978-11-20 IT IT29951/78A patent/IT1101113B/en active
- 1978-11-20 JP JP53142435A patent/JPS5857321B2/en not_active Expired
- 1978-11-21 DE DE19782850973 patent/DE2850973A1/en active Granted
- 1978-11-21 GB GB7845388A patent/GB2008504B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2008504B (en) | 1982-11-24 |
| FR2409163A1 (en) | 1979-06-15 |
| GB2008504A (en) | 1979-06-06 |
| DE2850973C2 (en) | 1989-10-12 |
| FR2409163B1 (en) | 1983-09-16 |
| JPS5857321B2 (en) | 1983-12-20 |
| DE2850973A1 (en) | 1979-05-23 |
| IT1101113B (en) | 1985-09-28 |
| JPS5480906A (en) | 1979-06-28 |
| MX146794A (en) | 1982-08-16 |
| BR7807462A (en) | 1979-07-24 |
| IT7829951A0 (en) | 1978-11-20 |
| LU80520A1 (en) | 1979-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |