Patent US3939621A successfully refreshed from Google Patents.
US3779831A
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Apparatus for retreading tires
Assignee: Oliver Tire and Rubber Co
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Filing: 1971-09-22
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Granted: 1973-12-18
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Expires: 1991-09-22
Abstract
Abstract The specification discloses an apparatus and method for adapting a standard tire retreading mold to use the newer continuous precured and premolded tire tread in retreading tires. The apparatus and method also make it possible to adapt a single size standard tire retreading mold to retread a number of different size tires by use of a mold liner and a plurality of variably sized gasket sealing means. The specification also discloses a new and improved tire retreading mold having two flat disks and an annular ring.
Inventors
- 👤 W Reppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:56
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/54; B29D30/542; B29D30/58; B29D2030/582; Y; Y10; Y10S; Y10S156/00; Y10S156/909
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
An apparatus for retreading tires as defined in claim 1 which further comprises an opening defined by said cover means to allow an operator of said apparatus to reach an interior support means mounted within a tire assembly prepared for retreading.
Claim 2
Dependent Claim
40 words
An apparatus for retreading tires as defined in claim 1 which further comprises a flat annular gasket means mounted on said base and extending outwardly beyond said annular rim to provide a fluid seal between said rim and said base.
Claim 3
Dependent Claim
34 words
An apparatus for retreading tires as defined in claim 1 which further comprises a thin annular gasket means mounted on said rim to provide a fluid tight seal between said rim and said base.
Claim 4
Dependent Claim
42 words
An apparatus for retreadinG tires as defined in claim 1 which further comprises a pair of thin annular gaskets mounted in either side of said annular rim to provide a fluid tight seal between said base, said rim, and said cover means.
Claim 5
Dependent Claim
34 words
An apparatus for retreading tires as defined in claim 2 which further comprises a thin annular gasket means mounted on said rim to provide a fluid tight seal between said rim and said base.
Claim 6
Dependent Claim
50 words
An apparatus for retreading tires as claimed in claim 1 which further comprises said fluid inlet and outlet means mounted on said annular rim, said fluid inlet means having a tangential jet to direct the fluid entering the chamber in a circumferential manner around said tire assembly prepared for retreading.
Claim 7
Dependent Claim
28 words
An apparatus for retreading tires as claimed in claim 1 wherein said means for evacuating air further comprises an air bleeding means formed from an air permeable fabric.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |