US3221398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a turbine type blower wheel
Assignee: Individual
•
Filing: 1961-01-25
•
Granted: 1965-12-07
•
Expires: 1981-01-25
Abstract
No abstract record available.
Inventors
- 👤 Ruth D Mayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:21
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; B; B21; B21D; B21D53/00; B21D53/26; B21D53/267; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49329
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
THE METHOD OF PRODUCING A BLOWER WHEEL INCLUDING THE STEPS OF FORMING EQUALLY SPACED BLADES FROM TWO SHEETS A MATERIAL LEAVING MARGINAL STRIPS INTEGRAL WITH THE ENDS OF THE BLADES, THERE BEING A MARGINAL STRIP ALONG EACH SIDE OF EACH SHEET, FORMING THE BLADES INTO A CONCAVOCONVEX SHAPE EXTENDING TRANSVERSELY FROM THE PLANE OF THE SHEETS, SUPERIMPOSING THE TWO SHEETS WITH THE BLADES EQUALLY SPACED SO THAT ALTERNATE BLADES PROJECT FROM ONE SHEET AND THE REMAINING BLADES FROM THE OTHER SHEET, CURVING THE SHEETS INTO A CYLINDRICAL MEMBER WITH THE GREATER PORTION OF THE BLADES DIRECTED INWARDLY, FORMING A FRUSTUM-CONICAL MEMBER HAVING THE APEX OF THE FRUSTUMCONICAL MEMBER OPEN AND THE PERIPHERAL OUTER MARGIN SECURED TO THE MARGINAL STRIPS OF EACH OF THE TWO CYLINDRICAL SHEETS OF MATERIAL ALONG ONE SIDE OF THE BLADES, FORMING A CIRCULAR BACKING MEMBER, SECURING THE PERIPHERAL MARGIN OF THE BACKING MEMBER TO THE OTHER MARGINAL STRIPS OF THE SHEETS, AND SECURING THE BLADES TO THE BACKING MEMBER SO AS TO FORM A BLOWER WHEEL.
Claim 2
Independent Claim
170 words
THE METHOD OF PRODUCING A BLOWER WHEEL INCLUDING THE STEPS OF FORMING EQUALLY SPACED BLADES FROM TWO SHEETS A MATERIAL LEAVING MARGINAL STRIPS INTEGRAL WITH THE ENDS OF THE BLADES, THERE BEING A MARGINAL STRIP ALONG EACH SIDE OF EACH SHEET, FORMING THE BLADES INTO A CONCAVOCONVEX SHAPE EXTENDING TRANSVERSELY FROM THE PLANE OF THE SHEETS, SUPERIMPOSING THE TWO SHEETS WITH THE BLADES EQUALLY SPACED SO THAT ALTERNATE BLADES PROJECT FROM ONE SHEET AND THE REMAINING BLADES FROM THE OTHER SHEET, CURVING THE SHEETS INTO A CYLINDRICAL MEMBER WITH THE GREATER PORTION OF THE BLADES DIRECTED INWARDLY, FORMING A FRUSTUM-CONICAL MEMBER HAVING THE APEX OF THE FRUSTUMCONICAL MEMBER OPEN AND THE PERIPHERAL OUTER MARGIN SECURED TO THE MARGINAL STRIPS OF EACH OF THE TWO CYLINDRICAL SHEETS OF MATERIAL ALONG ONE SIDE OF THE BLADES, FORMING A CIRCULAR BACKING MEMBER, SECURING THE PERIPHERAL MARGIN OF THE BACKING MEMBER TO THE OTHER MARGINAL STRIPS OF THE SHEETS, AND SECURING THE BLADES TO THE BACKING MEMBER SO AS TO FORM A BLOWER WHEEL.
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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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |