Patent US4412965A successfully refreshed from Google Patents.
US4412965A
Expired / Lapsed
US
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Method of making an air spring
Assignee: Goodyear Tire and Rubber Co
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Filing: 1981-09-08
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Granted: 1983-11-01
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Expires: 2001-09-08
Abstract
Abstract A method of making an air spring comprising spreading a fabric around a core having the shape of said air spring, anchoring edges of said fabric in overlap area to the core to form a reinforcing member thereon, placing the core having the reinforcing member thereon in a mold, closing said mold, injecting an elastomeric precursor into the mold and curing to form said air spring.
Inventors
- 👤 Donald R. Thompson
- 👤 Robert H. Vogliano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:18
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/86; B29C45/00; B29C45/14; B29C45/14778; B29D; B29D22/00; B29D22/02; B29D22/023; B29K; B29K2021/00; B29K2713/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A method for making an air spring comprising, spreading a fabric around a core having a desired air spring shape, overlapping ends of said fabric in an axially extending region of said core, anchoring the overlapping ends of said fabric to said core, placing the core and fabric in a mold, injecting an elastomeric material in said mold and curring said material in said mold to form an air spring having a fabric reinforcement.
Claim 2
Independent Claim
74 words
A method for making an air spring comprising, spreading a fabric around a core having a desired air spring shape, overlapping ends of said fabric in an axially extending region of said core, anchoring the overlapping ends of said fabric to said core, placing the core and fabric in a mold, injecting an elastomeric material in said mold and curring said material in said mold to form an air spring having a fabric reinforcement.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein bead wires are attached to the core.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the ends are pinned longitudinally to the core.
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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) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |