US3087528A - Reserve chamber tubeless tire - Google Patents

Reserve chamber tubeless tire Download PDF

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Publication number
US3087528A
US3087528A US712217A US71221758A US3087528A US 3087528 A US3087528 A US 3087528A US 712217 A US712217 A US 712217A US 71221758 A US71221758 A US 71221758A US 3087528 A US3087528 A US 3087528A
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US
United States
Prior art keywords
tire
wall member
rim
wall
tubeless
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 - Lifetime
Application number
US712217A
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English (en)
Inventor
Herbert B Hindin
Leonard E Reinowski
Richard J Olejniczak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uniroyal Inc
Original Assignee
United States Rubber Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by United States Rubber Co filed Critical United States Rubber Co
Priority to US712217A priority Critical patent/US3087528A/en
Priority to FR1213962D priority patent/FR1213962A/fr
Priority to GB38415/58A priority patent/GB843589A/en
Priority to BE573675A priority patent/BE573675A/fr
Application granted granted Critical
Publication of US3087528A publication Critical patent/US3087528A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B60C5/02—Inflatable pneumatic tyres or inner tubes having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube
    • 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
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • B60C17/01—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional inflatable supports which become load-supporting in emergency

Definitions

  • HINDIN ETAL RESERVE CHAMBER TUBELESS TIRE 3 Sheets-Sheet 2 Fi led Jan. 50, 1958 INVENTORS HERBERT
  • HINDIN LEONARD E. REINOWSKI BY RICHARD J. OLEJNICZAK ⁇ QMXMZ ATTORNEY April '30, 1963
  • This invention relates to pneumatic tires of the tubeless type, and more particularly to a tubeless tire having means cooperating therewith to form a reserve air chamber for emergency use in the event of failure of the tire due to a puncture, blowout, or the like.
  • tire manufacturers have attempted to eliminate the need for a spare tire and wheel in various ways; as, for instance, by a diaphragm within the tire, dividing the same into outer and inner compartments which are separately inflated or connected by slow-leaking valves.
  • the air retained in the inner compartment prevents a complete collapse of the tire and permits the driver to bring the vehicle to a safe stop, or possibly drive the car a sufiicient distance to reach its destination or a service station where it can be repaired.
  • This presumably would eliminate the need for a spare tire and avoid the necessity of making a roadside change of tires.
  • diaphragm or dual compartment tires of this type In one brand of these tires now on the market, the diaphragm is provided with beads at its edges which are seated on ledges extending inwardly from the inner Wall of the tire adjacent the bead portions thereof. In another brand, the diaphragm is held in place by extending the edges thereof between the beads of the tire and the portion of the rim upon which the tire is mounted.
  • the principal objects of the invention are attained by providing a substantially conventional tubeless tire with a flexible, fabric reinforced, air impervious wall or partition permanently adhered to the tire liner stock circum'ferentially of the tire intermediate the crown and bead portions thereof, and adapted for movement from a position within the well of the tire rim to a position engaging the inner crown area of the tire.
  • Another object of the invention is to provide a movable wall or partition of the character described which may be moved by inflation through the conventional rim valve from its normal or collapsed position within the rim area to its other or extended position in engagement with the crown area of the tire, to provide an emergency air chamber inside the tire, despite a previous failure due to a puncture, blowout, or the like.
  • Still another object of the invention is to provide a movable wall or partition member of the character described which is fashioned or shaped to the contour of the crown area of the tire, during the shaping and vulcanization of the tire, so that when the two are in engagement, relative movement therebetween, and consequent chafing, is reduced to a minimum and deleterious heat build-up is substantially eliminated.
  • the wall or partition member is shaped and cured with the the during the shaping and vulcanization of the latter, no additional molds and shaping and curing apparatus are necessary as is the case where separate diaphragms are used.
  • a further object of the invention is to provide means for inducing predetermined folds or pleats in the wall member so that the wall member when collapsed may uniformly accommodate itself to the smaller diameter of the rim well. Thus, bunching or uneven distribution of the wall member, which might cause an out-of-balance condition in the tire, is prevented.
  • a still further object of the invention is to provide a tubeless tire of the character described in which the wall or partition member is normally located in the tire in a position remote from, or out of proximity to, the crown region of the tire, and thus is not exposed to injury from puncturing objects or blowouts.
  • Still another object of the invention is to provide a tubeless tire of the character described in which the emergency wall or partition normally extends into the rim area of the wheel, and thus acts in a manner similar to an inner tube to prevent accidental roll-01f of the tire, and also seals against possible leakage of air at the bead portions of the tire. Furthermore, the emergency wall in its collapsed position seals the air chamber of the tire against failures due to bead wire separation, bead wire cuts, and carcass breaks above the bead.
  • Another object of the invention is to provide a tubless tire of the character described in which the reserve chamer forms an integral part of the tire, thus eliminating the mounting difliculties inherent in tires provided with separate diaphragms, and also in conventional tubeless tires.
  • Conventional tubeless tires cannot be inflated until the beads are in substantial sealing engagement with the rim and rim flanges. This requires special equipment or tools and some effort on the part of the operator.
  • the tire beads may be forced into engagement with the rim flanges and thus properly mounted by inflating the tire through the sidewall valve.
  • FIG. 1 is a transverse sectional view of a tire and rim assembly embodying the present invention, with the emergency wall or partition member in its normal or collapsed position;
  • FIG. 2 is a similar view showing the emergency wall member in its extended position
  • FIG. 3 is a circumferential sectional view of a tire and rim assembly showing the emergency wall member in the position illustrated in FIG. 1;
  • FIG. 4 is a fragmentary partial sectional perspective view of the tire of this invention with the emergency wall member in the position illustrated in FIG. 1;
  • FIGS. 5, 6, 7, 8, 9 and 10 are partial sectional views showing one method of fabricating the emergency wall member on a building drum
  • FIG. 11 is an elevational view of a building drum with the two plies of the emergency wall applied thereto and showing one stage of the fabrication of the tire of this invention
  • FIG. 12 is a fragmentary partial sectional view showing the tire carcass and emergency wall member assembled on the tire building drum prior to the shaping and vulcanization thereof, and
  • FIGS. 13 and 14 are fragmentary sectional views showing modifications of the manner in which the emergency wall member is attached to the liner of the tire.
  • the numeral 10 indicates generally a tubeless type pneumatic tire of the so-called straight sidewall type comprising a tread portion 11, sidewalls 12, a carcass 13 usually composed of a plurality of plies 14 (see FIG. 12) of cord fabric skimcoated with conventional carcass stock, and bead portions 15, provided with substantially inextensible bead wires 16.
  • the reference character 17 indicates a liner in the form of a sheet of air impervious material extending throughout the interior of the tire from one bead portion to the other.
  • the reference character 18 indicates a conventional type of drop center rim upon which the tire is mounted.
  • the rim 18 is provided with an inflating valve 19 and the reference character 20 indicates an inflating valve located in the sidewall of the tire.
  • the valves 19 and 20 may be of any preferred or desired construction, it being essential only that both of these valves have an air-tight connection with the rim or tire structure with which they are respectively associated. If desired, the rim valve 19 may be replaced by a valve (not shown) similar to valve 20 located in the tire sidewall in a position to permit inflation of the chamber between the rim 18 and partition 25.
  • the tire construction thus far described, except possibly for the sidewall valve 20, is a conventional type of tubeless pneumatic tire now quite generally in commercial use.
  • the present invention relates to a simple, but effective, means, useful upon tire failure, to convert the tubeless tire into a partial or semitube type tire, whereupon it may be reinflated and driven to its destination or to a service station where it can be repaired.
  • the invention consists in the provision of a flexible, fabric reinforced, air impervious, wall or partition 25, permanently adhered during vulcanization of the tire to the inside of the tire circumferentially thereof intermediate the crown and bead portions of the tire.
  • This wall or partition 25 is preferably formed of two plies of nylon cord fabric, each ply of which is skimcoated on each side with a suitable rubber stock to render the same air impervious.
  • the skimcoat may be composed of an admixture of styrene butadiene rubber, natural rubber and rubber reclaim.
  • This wall or partition 25 is preferably formed of two plies with the cords of the plies extending in opposite directions at an approximate angle of from 55 to 65 to the circumferential center line of the tire building drum upon which the wall member 25 is fabricated. After the wall or partition member is shaped these cords extend at an approximate angle of from 30 to 45 to the circumferential center line of the tire.
  • the emergency wall member 25 preferably comprises two plies 26 and 27, and in fabricating the wall member 25 with the liner 17, as shown in FIGS. 5 to 11, the marginal edges 26a and 27a of the plies 26 and 27 are folded to extend in opposite directions; i.e., towards the bead and crown portions of the tire, respectively, to provide a fold line 28 at each side of the tire about which the emergency wall member 25 moves from its position shown in FIG. 1 to the position shown in FIG. 2.
  • the dimensions or surface extent and shape of the Wall member 25 between the points of attachment or fold lines 28 are such that in one position, as shown in FIG. 2, the Wall member will engage the crown area of the tire in a relaxed condition. In its other position it will lie within the well of the rim :as shown in FIG. 1 in an extended condition along the RIG. 1 cross-section of the tire and rim. If the Wall member 25 is formed of extensible material, its dimensions and points of attachment can be such that the wall member will be in a relaxed condition when in engagement with the crown of the tire (FIG. 2) and in a stretched condition when in the position shown in FIG. 1. This will compensate for the difference between the diameters of the tire crown and rim.
  • the tire With the wall member in the position shown in FIG. 1 the tire cavity above the wall member 25 has been inflated through the sidewall valve 20, and the tire is functioning as a conventional tubeless tire.
  • the tire has the added advantage that with the wall member 25 extending into the rim, the wall member acts in a manner similar to an inner tube to prevent accidental roll-off of the tire and also seals against leakage of air at the bead portions of the tire and other failures at or above the beads.
  • the tire can he reinflated through the rim valve 19 to move the emergency Wall from the position shown in FIG. 1 to that shown in FIG. 2.
  • the wall 25 When the wall 25 is in this position, it spans and seals off the punctured or damaged portion of the tire casing and cooperates with the tire and rim to form a second or reserve chamber which will hold air despite the damage to the tire, and enable the car to reach its destination or a service station for repair.
  • This second or reserve inflatable chamber is substantial equal in volume to that of the tire before failure.
  • the first ply 26 of bias-cut, skimcoated, nylon cord fabric is applied on a conventional building drum B and then spliced in the customary manner.
  • the edges of the ply 26 are then masked by the application of strips M of suitable masking material, such as sheet polyethylene.
  • the second ply 27 formed of bias-cut, skimcoated, nylon cord fabric is applied to the building drum and properly spliced and stitched to the ply 26; see FIG. 7.
  • the cords in the second ply 27 extend in an opposite direction to the cords in ply 26.
  • the second ply 27 is somewhat wider than the first ply 26, and the marginal edges of the two plies are separated by the masking strips M.
  • the top or exposed surface .of the second ply 27 is coated with a butyl cement.
  • This butyl cement may, by way of example but not by way of limitation, be composed of 1 /2 percent raw butyl and gasoline in which the butyl is dissolved or dispersed. This butyl cement prevents adhesion between the exposed surface of ply 27 and the inner liner of the tire during vulcanization, but does not destroy the building tack of this surface.
  • filler strips 32 of rubber material are applied around the drum immediately adjacent fold line F-F; see FIG. 10. These filler strips fill in the voids between the liner 17 (shown in dotted lines in FIG. and the double thickness of material at the fold line FF. x 1
  • the marginal portions 26a extend in the direction of the tire beads and the marginal portions 27a extend in the direction of the crown of the tire.
  • the size and shape of the wall member 25 between the points of attachment to the side walls of the tire is such that there is little, if any, strain at the points of attachment in either position of the wall member.
  • the marginal edges 26b and 27b of the wall member 251) are folded along the fold line 28b so as to extend towards the beads of the tire.
  • the edges 26c and 270 of the wall member 250 are folded along the fold line 28c so as to extend towards the crown of the tire.
  • a conventional tubeless tire can be provided with a second or reserve a-ir chamber, rendered operative, when necessary, by inflation through the standard rim valve.
  • the emergency wall member lies substantially within the rim and, therefore, does not affect the operation of the tire as a tubeless tire.
  • the emergency Wall member acts in a manner similar to an inner tube to prevent accidental roll-off of the tire, and also seals against leakage of air at the bead portion of the tire and other failures at or above the bead.
  • a tire constructed in accordance with this invention can be readily fabricated on a conventional building drum and shaped and cured in the same manner as other types of tires.
  • tubeless tires of this construction may be more readily mounted upon the rim, because it is unnecessary to establish a subtantially airtight seal between the beads and the rim prior to inflation.
  • the emergency chamber may be inflated by .a hand pump, or by the air hose at a service station, if one is available.
  • the car owner may be provided with a cylinder of some gas under pressure, such, for instance, as CO provided with a discharge nozzle suitable for attachment to the rim valve of the tire.
  • means comprising a flexible, air impervious wall member attached at its marginal edges to the inside of the tire circum-ferentially thereof between the crown and bead portions of the tire, said wall member being substantially nonstretchable and formed of at least two oppositely laid plies of bias-cut rubberized cord fabric,
  • said wall member being adapted to lie within the rim area in relaxed condition to prevent accidental roll-off of the tire and to seal against leakage of air at the bead portions of the tire, said wall member being also adapted to be moved by inflation to another position wherein it will engage the inner crown area of the tire in a relaxed condition and in essentially smooth contact therewith, to cover any damaged area in the tire and to provide a second air chamber for emergency use, and inflation openings formed in said tire and said rib and arranged to permit inflation of the tire on either side of said wall member for selective movement of said wall member to either of its positions aforesaid.
  • means comprising a flexible, air-impervious wall member attached at its marginal edges to the inside of the tire ciroumferentially thereof between the crown and bead portions of the tire, said wall member being substantially nonstretchable and formed of at least two oppositely laid plies of bias cut rubberized cord fabric shaped to the contour of the inner crown area of the tire, said Wall member being adapted to lie within the rim area in relaxed condition to prevent accidental roll-off of the tire and to seal against leakage of air at the bead portions of the tire, said wall member being also adapted to be moved by inflation to another position wherein it will engage the inner crown area of the tire in a relaxed condition and in essentially smooth contact therewith, to cover any damaged area in the tire and to provide a second air chamber for emergency use, and inflation openings formed in said tire and said rim and arranged to permit inflation of the tire on either side of said wall member for selective movement of said wall member
  • means comprising a flexible, air-impervious wall member attached at its marginal edges to'the inside of the tire circumferentially thereof between the crown and bead portions of the tire, said wall member being substantially nonstretchable and formed of at least two oppositely laid plies of bias-cut rubberized cord fabric shaped to the contour of the inner crown area of the tire during the shaping of the tire, said wall member being adapted to lie within the rim area in relaxed condition to prevent accidental roll-off of the tire and to seal against leakage of air at the bead portions of the tire, said wall member being also adapted to be moved by inflation to another position wherein it will engage the inner crown area of the tire in a relaxed condition and in essentially smooth contact therewith, to cover any damaged area in the tire and to provide a second air chamber for emergency use, and inflation openings formed in said tire and said rim and arranged to permit inflation of the tire on either side of said wall member
  • -A pneumatic tubeless tire and rim combination comprising a rim and a reinforced casing having an outer tread surface, sidewalls, a bead at each inner sidewall edge and an opening between said beads, said casing mounted on the rim with said beads in sealing engagement with the sides of said rim; and a diaphragm of substantially nonstretchable, flexible, air-impervious material having lateral margins attached to the inside of each said sidewall at a position spaced from said beads, inflating means communicating with the interior of said casing through the rim and through the casing thereof respectively for selective movement of said diaphragm to a position around the inside of said casing and to a position to extend through said opening to engage the interior surface of said rim, and said diaphragm being of a shape and size between the lateral mar-gins thereof to extend into said positions in a substantially relaxed condition so as to define with said tire an inner chamber operative to maintain said tire in fully inflated condition.
  • a pneumatic tubeless tire and rim combination comprising a rim and a reinforced casing having an outer tread surface, sidewalls, a bead at each inner sidewall edge and an opening between said beads, said casing mounted on the rim with said beads in sealing engagement with the sides of said rim; and a diaphragm of substantially nonstretchable, flexible, air-impervious material having lateral margins attached to the inside of each said sidewall at a position between said beads and tread surface, inflating means formed in said tire and said rim and communicating with the interior'of said casing on both sides of said diaphragm for selective movement of said diaphragm to a position around the inside of said casing and to a position to extend through said opening to engage the interior surface of said rim, and said diaphragm being dimensioned between the lateral margins thereof to extend into said positions so as to define with said tire an inner chamber operative to maintain said tire in fully inflated condition.
  • a pneumatic tubeless tire and rim combination comprising a rim and a reinforced casing having an outer tread surface, sidewalls, a head at each inner sidewall edge and an opening between said beads, said casing mounted on the rim with said beads in sealing engagement with the sides of said rim; and a diaphragm of clastomeric material having lateral margins attached to the inside of each said sidewall at a position spaced from said beads, inflating means communicating with the interior of said casing through the rim and through the casing thereof respectively for selective movement of said diaphragm to a position around the inside of said casing and to a position to extend through said opening to engage the interior surface of said rim, and said diaphragm being of such material and width between the lateral margins thereof as to be disposed in said positions in an extended condition along a given cross-section of the tire and rim so as to define with said tire an inner chamber operative to maintain said tire in fully inflated condition.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
US712217A 1958-01-30 1958-01-30 Reserve chamber tubeless tire Expired - Lifetime US3087528A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US712217A US3087528A (en) 1958-01-30 1958-01-30 Reserve chamber tubeless tire
FR1213962D FR1213962A (fr) 1958-01-30 1958-11-26 Pneumatique sans chambre à air indépendante, à chambre de secours
GB38415/58A GB843589A (en) 1958-01-30 1958-11-28 Improvements in reserve chamber tubeless tire
BE573675A BE573675A (fr) 1958-01-30 1958-12-06 Pneumatique sans chambre à air indépendante, à chambre de secours.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US712217A US3087528A (en) 1958-01-30 1958-01-30 Reserve chamber tubeless tire

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US3087528A true US3087528A (en) 1963-04-30

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US712217A Expired - Lifetime US3087528A (en) 1958-01-30 1958-01-30 Reserve chamber tubeless tire

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US (1) US3087528A (fr)
BE (1) BE573675A (fr)
FR (1) FR1213962A (fr)
GB (1) GB843589A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110339A (en) * 1962-01-02 1963-11-12 Lawrence K Fickel Ventilated pneumatic tire structure and method of fabricating the tire
US3905412A (en) * 1972-08-04 1975-09-16 Pirelli Safety tire having automatic inflating means in the event of tears or punctures
CN113165448A (zh) * 2018-11-30 2021-07-23 株式会社普利司通 多气室轮胎

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US616516A (en) * 1898-12-27 Pneumatic tire
US1342297A (en) * 1919-08-09 1920-06-01 Robert L Prudhomme Automobile-tire
US2779380A (en) * 1954-05-28 1957-01-29 Firestone Tire & Rubber Co Tubeless tire
US2942642A (en) * 1956-04-23 1960-06-28 Goodrich Co B F Inflatable vehicle tire with valve in a sidewall

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US616516A (en) * 1898-12-27 Pneumatic tire
US1342297A (en) * 1919-08-09 1920-06-01 Robert L Prudhomme Automobile-tire
US2779380A (en) * 1954-05-28 1957-01-29 Firestone Tire & Rubber Co Tubeless tire
US2942642A (en) * 1956-04-23 1960-06-28 Goodrich Co B F Inflatable vehicle tire with valve in a sidewall

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110339A (en) * 1962-01-02 1963-11-12 Lawrence K Fickel Ventilated pneumatic tire structure and method of fabricating the tire
US3905412A (en) * 1972-08-04 1975-09-16 Pirelli Safety tire having automatic inflating means in the event of tears or punctures
CN113165448A (zh) * 2018-11-30 2021-07-23 株式会社普利司通 多气室轮胎
US11970030B2 (en) 2018-11-30 2024-04-30 Bridgestone Corporation Multi air chamber tire

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Publication number Publication date
FR1213962A (fr) 1960-04-05
BE573675A (fr) 1959-04-01
GB843589A (en) 1960-08-04

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