Patent US3975490A successfully refreshed from Google Patents.
US3975490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding a reinforced tire from two preformed sections
Assignee: Laitram LLC
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Filing: 1973-06-28
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Granted: 1976-08-17
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Expires: 1993-06-28
Abstract
Abstract Method of making a reinforced pneumatic tire in which the tire body is formed in at least two sections each including a side wall and a plurality of annular bands each including an annular reinforcing belt embedded in an elastomer. The tire sections are assembled in a mold with the annular bands of each section interleaved with the annular bands of another section and the elastomer is cured to form an integral tire body. The tire may be formed of two reinforced sections with the interleaved bands forming the annular tread section of the tires, or as three reinforced sections, including two sections each including a side wall and annular bands and a connecting section including annular bands with reinforcing belts which are interleaved with the annular bands of the other two sections to form a tread section. An annular, elastomeric tread section may be formed separately and bonded around and to the annular bands of the reinforced sections.
Inventors
- 👤 James M. Lapeyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:17
CPC Classifications
B; B60; B60C; B60C19/00; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D2030/086; Y; Y10; Y10S; Y10S264/00; Y10S264/59
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
185 words
The method of manufacturing a pneumatic tire body having a general toroidal shape including side walls and an annular portion on which the tread can be formed, said method comprising the steps of: assembling elastomer impregnated reinforcing elements to form at least two separate preformed sections of a tire body, two of said sections including a reinforced side wall and plural radially-spaced reinforced annular bands adapted to be interleaved with one or more corresponding annular bands of another sections of said tire body to form the annular portion of said tire body; shaping and hardening the elastomer of said sections while keeping said elastomer in at least a partially curable condition; assembling shaped and hardened said sections in a mold and interleaving said annular bands of one of said section with corresponding annular bands of another of said sections; and applying heat and pressure to the tire sections in said mold to cure said elastomer and bond the interleaved annular bands to one another to form an integral tire body having side walls joined by an annular portion including overlapped, interleaved bands and reinforcing elements.
Claim 2
Independent Claim
185 words
The method of manufacturing a pneumatic tire body having a general toroidal shape including side walls and an annular portion on which the tread can be formed, said method comprising the steps of: assembling elastomer impregnated reinforcing elements to form at least two separate preformed sections of a tire body, two of said sections including a reinforced side wall and plural radially-spaced reinforced annular bands adapted to be interleaved with one or more corresponding annular bands of another sections of said tire body to form the annular portion of said tire body; shaping and hardening the elastomer of said sections while keeping said elastomer in at least a partially curable condition; assembling shaped and hardened said sections in a mold and interleaving said annular bands of one of said section with corresponding annular bands of another of said sections; and applying heat and pressure to the tire sections in said mold to cure said elastomer and bond the interleaved annular bands to one another to form an integral tire body having side walls joined by an annular portion including overlapped, interleaved bands and reinforcing elements.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said reinforcing elements include woven fabrics.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein said reinforcing elements are each assembled and compressed in a mold to form one of said sections.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein said annular reinforcing belt is embedded in said elastomer of each of said annular bands.
Claim 6
Dependent Claim
84 words
The method of claim 1 wherein said tire body is formed in at least three sections including two lateral sections each including a side wall and annular bands including reinforcing elements and a connecting section including a plurality of interconnected annular bands each including an annular reinforcing belt embedded in said elastomer, and said interconnected annular bands of said connecting section are interleaved with and bonded to said annular bands of said side sections to form said annular portion and an integral tire body.
Claim 7
Dependent Claim
35 words
The method of claim 5 including forming an annular tread section of elastomer, engaging and joining said tread section with an outer annular band of said connecting section and molding treads in said tread section.
Claim 8
Dependent Claim
25 words
The method of claim 5 wherein said side sections are formed in the same or substantially identical molds and said connecting section is laterally symmetrical.
Claim 9
Dependent Claim
25 words
The method of claim 7 wherein an annular reinforcing belt is embedded in said elastomer of each of said annular bands of said side sections.
Claim 10
Dependent Claim
62 words
The method of claim 1 wherein said tire body is formed in only two of said separate tire body sections each including a side wall and a plurality of annular bands, said annular bands of said two separate sections being interleaved with and bonded to one another to form said annular portion of said tire body on which the tread is formed.
Claim 11
Dependent Claim
15 words
The method of claim 9 wherein each of said two sections is formed by molding.
Claim 12
Dependent Claim
40 words
The method of claim 9 wherein an annular tread section is preformed of an elastomer and is engaged around and bonded to said annular portion and threads are formed in said tread section after said sections have been joined together.
Claim 13
Dependent Claim
63 words
The method of claim 9 wherein each of said separate tire body sections is formed with an outer annular portion including a relatively thick annular layer of an elastomer having an edge adapted to abut the edge of said annular layer of the other tire section and said edges are located in abutment and joined to one another during curing of said elastomer.
Claim 14
Dependent Claim
16 words
The method of claim 12 wherein said annular layer is formed in an outermost annular band.
Claim 15
Dependent Claim
16 words
The method of claim 12 wherein said edges are formed with mutually engagable indentations and projections.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |