Patent US3304640A successfully refreshed from Google Patents.
US3304640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat motor and dust shield therefor
Assignee: Individual
•
Filing: 1963-12-06
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Granted: 1967-02-21
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Expires: 1983-12-06
Abstract
No abstract record available.
Inventors
- 👤 William M Swartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:31
CPC Classifications
F; F21; F21V; F21V1/00; F21V1/10; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
AN AIR DRIVEN MOTOR COMPRISING AN IMPELLER ROTATABLE UPON AXIAL FLOW OF AIR THERETHROUGH, THRUST-BEARING MEANS ROTATABLY SUPPORTING THE IMPELLER AND FROM WHICH THE IMPELLER IS SUSPENDED, SAID THRUST-BEARING MEANS INCLUDING A MEMBER TERMINATING IN A NEDDLE POINT, MEANS FOR INDUCING A FLOW OF AIR PAST THE THRUST-BEARING MEANS AND AXIALLY THROUGH THE IMPELLER, AND MEANS ADJACENT TO THE THRUST-BEARING MEANS FOR SHIELDING THE NEEDLEPOINTED MEMBER FROM PARTICLES OF FOREIGN MATTER CARRIED BY THE INDUCED FLOW OF AIR, SAID SHIELDING MEANS COMPRISING AN ELEMENT THAT IS PRE-FORMED OF A SOLID MATERIAL HAVING LUBRICATING PROPERTIES AND IN WHICH PARTICLES OF
Claim 2
Dependent Claim
99 words
AN AIR DRIVEN MOTOR COMPRISING AN IMPELLER ROTATABLE UPON AXIAL FLOW OF AIR THERETHROUGH, THRUST-BEARING MEANS ROTATABLY SUPPORTING THE IMPELLER AND FROM WHICH THE IMPELLER IS SUSPENDED, SAID THRUST-BEARING MEANS INCLUDING A MEMBER TERMINATING IN A NEDDLE POINT, MEANS FOR INDUCING A FLOW OF AIR PAST THE THRUST-BEARING MEANS AND AXIALLY THROUGH THE IMPELLER, AND MEANS ADJACENT TO THE THRUST-BEARING MEANS FOR SHIELDING THE NEEDLEPOINTED MEMBER FROM PARTICLES OF FOREIGN MATTER CARRIED BY THE INDUCED FLOW OF AIR, SAID SHIELDING MEANS COMPRISING AN ELEMENT THAT IS PRE-FORMED OF A SOLID MATERIAL HAVING LUBRICATING PROPERTIES AND IN WHICH PARTICLES OF
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |