Patent US3669581A successfully refreshed from Google Patents.
US3669581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold press for tire curing apparatus
Assignee: United Mcgill Corp
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Filing: 1971-01-08
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Granted: 1972-06-13
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Expires: 1991-01-08
Abstract
Abstract A TIRE CURING APPARATUS OF THE POT-HEATER TYPE IS PROVIDED WITH A MOLD-PRESS CONSTRUCTION INCORPORATING A CONICALLY SHAPED SHELL FOR SUPPORT OF A FLUID-RAM ASSEMBLY WHICH RESULTS IN A SUBSTANTIALLY REDUCTION IN THE TOTAL WEIGHT OF THE APPARATUS WITHOUT CORRESONNDING DECREASE IN THE STRUCTURAL STRENGTH. THE FRUSTO-CONICALLY SHAPED SHELL AND RAM ASSEMBLY ARE COOPERATIVELY CONFIGURED TO PROVIDE A SINGLE-POINT SUSPENSION FOR THE RAM-ASSEMBLY WHICH UNIFORMLY DISTRIBUTES STRESS FORCES THROUGHOUT THE STRUCTURE AND FACILITATES PRECISE ALIGNMENT OF THE RAM ASSEMBLY WITH THE PRESS BODY.
Inventors
- 👤 Robert F Maurer
- 👤 Robert D Mcvay
- 👤 Donald L Hummel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:33
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |