Patent US2547349A successfully refreshed from Google Patents.
Patent US2826371A successfully refreshed from Google Patents.
US2826371A
Expired / Lapsed
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Manganese steel crusher wearing plate
Assignee: Frog Switch & Manufacturing Co
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Filing: 1955-01-28
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Granted: 1958-03-11
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Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Forrest E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
B; B02; B02C; B02C1/00; B02C1/02; B02C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A CAST MANGANESE STEEL WEARING PLATE FOR MOUNTING IN A CRUSHING MECHANISM AND HAVING A FRONT CRUSHING FACE AND A BACK MOUNTING SURFACE, COMPRISING A PLURALITY OF PARALLEL, ALINED BEAMS RIGIDLY CONNECTED BY A SUBSTANTIALLY FLAT, RELATIVELY THIN, SHEET FORMED INEGRALLY WITH SAID BEAMS AND DEFINING A NON-RECESSED BACK MOUNTING SURFACE, SAID BEAMS HAVING OPPOSED PARALLEL SIDE WALLS SPACED APART SO AS TO PERMIT FREE CIRCULATION OF A LIQUID COOLANT THEREBETWEEN WHEN HEAT TREATING SAID PLATE, AND SAID BEAMS AND SAID SHEET BEING SIZED AND PROPORTIONED SO THAT (1) ALL INTERNAL METAL PORTIONS ARE A MAXIMUM OF 2 1/2 INCHES FROM THE CLOSEST METAL SURFACE AND (2) EACH OF SAID BEAMS PRESENT SUBSTANTIALLY INIFORM CROSS SECTION, THUS PERMITTING POSITIVE AND UNIFORM HEAT TREATMENT OF ALL OF THE MANGANESE STEEL MAKING UP SAID PLATE.
Claim 2
Dependent Claim
133 words
A CAST MANGANESE STEEL WEARING PLATE FOR MOUNTING IN A CRUSHING MECHANISM AND HAVING A FRONT CRUSHING FACE AND A BACK MOUNTING SURFACE, COMPRISING A PLURALITY OF PARALLEL, ALINED BEAMS RIGIDLY CONNECTED BY A SUBSTANTIALLY FLAT, RELATIVELY THIN, SHEET FORMED INEGRALLY WITH SAID BEAMS AND DEFINING A NON-RECESSED BACK MOUNTING SURFACE, SAID BEAMS HAVING OPPOSED PARALLEL SIDE WALLS SPACED APART SO AS TO PERMIT FREE CIRCULATION OF A LIQUID COOLANT THEREBETWEEN WHEN HEAT TREATING SAID PLATE, AND SAID BEAMS AND SAID SHEET BEING SIZED AND PROPORTIONED SO THAT (1) ALL INTERNAL METAL PORTIONS ARE A MAXIMUM OF 2 1/2 INCHES FROM THE CLOSEST METAL SURFACE AND (2) EACH OF SAID BEAMS PRESENT SUBSTANTIALLY INIFORM CROSS SECTION, THUS PERMITTING POSITIVE AND UNIFORM HEAT TREATMENT OF ALL OF THE MANGANESE STEEL MAKING UP SAID PLATE.
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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) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |