US3872201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of curing foam inflated tires
Assignee: Goodyear Tire and Rubber Co
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Filing: 1973-09-19
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Granted: 1975-03-18
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Expires: 1993-09-19
Abstract
Abstract A method for expanding and curing foamable elastomeric material which is placed within the cavity of a previously molded tire. The tire, filled with foamable rubber material, is mounted on a wheel rim and contacted with steam in an elemental oxygen-free atmosphere to simultaneously foam and cure the elastomeric material within the tire cavity.
Inventors
- 👤 David H Paul
- 👤 Joseph A Rosey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:19
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/04; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10279; Y10T152/10378; Y10T152/10387; Y10T152/10396; Y10T152/10405
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
201 words
A METHOD OF INFLATING TIRES WITH FOAMABLE ELASTOMERIC MATERIAL COMPRISING THE STEPS OF: A. AT LEAST PARTIALLY FILLING THE CAVITY OF A PREVIOUSLY MOLDED AND VULCANIZED TIRE WITH UNFOAMED, UNCURED, FOAMABLE ELASTOMERIC MATERIAL SELECTED FROM A GROUP OF NATURAL RUBBER, POLYISOPRENE, ETHYLENE-PROPYLENE TERPOLYMER, POLYBUTADIENE, SILICONE POLYMER, STYRENE-BUTADIENE, NEOPRENE, ACRYLONITRILE, AND CHLOROSULFONATED POLYETHYLENE; B. MOUNTING THE TIRE WITH THE MATERIAL ON A WHEEL RIM; C. PLACING THE TIRE, MOUNTED ON THE WHEEL RIM, IN A CHAMBER SEALED FROM THE AMBIENT ATMOSPHERE; D. CIRCULATING STEAM AT A TEMPERATURE IN THE RANGE OF FROM 212*F., WITHIN THE CHAMBER IN CONTACT WITH THE TIRE AND RIM FOR A PREDETERMINED DESIRED PERIOD OF TIME; E. RELEASING THE STEAM FROM WITHIN THE CHAMBER AND MAINTAINING THE ATMOSPHERE SURROUNDING THE TIRE AND RIM SUBSTANTIALLY FREE OF ELEMENTAL OXYGEN FOR A PREDETERMINED DESIRED PERIOD OF TIME TO LET THE MATERIAL WITHIN THE TIRE CAVITY AT LEAST PARTIALLY FOAM; AND F. RECIRCULATING STEAM AT A TEMPERATURE IN THE RANGE OF FROM 212*F. TO 400*F. WITHIN THE CHAMBER TO AGAIN CONTACT THE TIRE AND RIM, THE STEPS (E) OF RELEASING YTHE STEAM, AND (F) OF RECIRCULATING STEAM BEING REPEATED, IF NECESSARY, UNTIL THE MATERIAL WITHIN THE TIRE IS FOAMED AND CURED.
Claim 2
Independent Claim
201 words
A METHOD OF INFLATING TIRES WITH FOAMABLE ELASTOMERIC MATERIAL COMPRISING THE STEPS OF: A. AT LEAST PARTIALLY FILLING THE CAVITY OF A PREVIOUSLY MOLDED AND VULCANIZED TIRE WITH UNFOAMED, UNCURED, FOAMABLE ELASTOMERIC MATERIAL SELECTED FROM A GROUP OF NATURAL RUBBER, POLYISOPRENE, ETHYLENE-PROPYLENE TERPOLYMER, POLYBUTADIENE, SILICONE POLYMER, STYRENE-BUTADIENE, NEOPRENE, ACRYLONITRILE, AND CHLOROSULFONATED POLYETHYLENE; B. MOUNTING THE TIRE WITH THE MATERIAL ON A WHEEL RIM; C. PLACING THE TIRE, MOUNTED ON THE WHEEL RIM, IN A CHAMBER SEALED FROM THE AMBIENT ATMOSPHERE; D. CIRCULATING STEAM AT A TEMPERATURE IN THE RANGE OF FROM 212*F., WITHIN THE CHAMBER IN CONTACT WITH THE TIRE AND RIM FOR A PREDETERMINED DESIRED PERIOD OF TIME; E. RELEASING THE STEAM FROM WITHIN THE CHAMBER AND MAINTAINING THE ATMOSPHERE SURROUNDING THE TIRE AND RIM SUBSTANTIALLY FREE OF ELEMENTAL OXYGEN FOR A PREDETERMINED DESIRED PERIOD OF TIME TO LET THE MATERIAL WITHIN THE TIRE CAVITY AT LEAST PARTIALLY FOAM; AND F. RECIRCULATING STEAM AT A TEMPERATURE IN THE RANGE OF FROM 212*F. TO 400*F. WITHIN THE CHAMBER TO AGAIN CONTACT THE TIRE AND RIM, THE STEPS (E) OF RELEASING YTHE STEAM, AND (F) OF RECIRCULATING STEAM BEING REPEATED, IF NECESSARY, UNTIL THE MATERIAL WITHIN THE TIRE IS FOAMED AND CURED.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein the steam is at a temperature in the narrower range of from 260*F. to 325*F.
Claim 4
Dependent Claim
13 words
The method of claim 2, wherein steam is at a temperature of 300*F.
Claim 5
Dependent Claim
10 words
The method of claim 1, wherein the material is polyisoprene.
Claim 6
Dependent Claim
14 words
The method of claim 1, wherein the material includes a blowing agent comprising N,N''-dimethyl-N,N''-dinitrosoterephthalate.
Claim 7
Dependent Claim
20 words
The method of claim 1, wherein the material includes a blowing agent which begins decomposing at a temperature of 160*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |