US3217628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser construction
Assignee: Air Devices Inc
•
Filing: 1963-03-06
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Granted: 1965-11-16
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Expires: 1983-03-06
Abstract
No abstract record available.
Inventors
- 👤 George J Sweeney
- 👤 Rocco R Borzone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:51
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF FORMING AND ASSEMBLING OBLIQUE TRAPEZOIDAL SHAPED VANES IN A RECTANGULAR DIFFUSER OF THE TYPE HAVING A PLURALITY OF SPACED PARALLEL OBLIQUE OUTER LOUVERS AND INTERNAL SPACED PARALLEL VERTICAL THROAT PORTIONS EXTENDING INWARDLY FROM SAID LOUVERS WHICH COMPRISES THE STEPS OF DIE CUTTING A STRIP OF MATERIAL TO FORM SAID VANES, FOLDING UP THE DIE CUT VANES FROM THE STRIP ABOUT A FOLD LINE THEN FOLDING UPWARDLY THE INSIDE EDGE OF THE STRIP AND PLACING THE STRIP AGAINST THE FACES OF THE LOUVERS WITH THE UPTURNED INSIDE EDGE AGAINST THE VERTICAL THROAT PORTION, AND MOUNTING THE STRIP UPON THE LOWER EDGE OF THE OUTER LOUVER.
Claim 2
Independent Claim
107 words
A METHOD OF FORMING AND ASSEMBLING OBLIQUE TRAPEZOIDAL SHAPED VANES IN A RECTANGULAR DIFFUSER OF THE TYPE HAVING A PLURALITY OF SPACED PARALLEL OBLIQUE OUTER LOUVERS AND INTERNAL SPACED PARALLEL VERTICAL THROAT PORTIONS EXTENDING INWARDLY FROM SAID LOUVERS WHICH COMPRISES THE STEPS OF DIE CUTTING A STRIP OF MATERIAL TO FORM SAID VANES, FOLDING UP THE DIE CUT VANES FROM THE STRIP ABOUT A FOLD LINE THEN FOLDING UPWARDLY THE INSIDE EDGE OF THE STRIP AND PLACING THE STRIP AGAINST THE FACES OF THE LOUVERS WITH THE UPTURNED INSIDE EDGE AGAINST THE VERTICAL THROAT PORTION, AND MOUNTING THE STRIP UPON THE LOWER EDGE OF THE OUTER LOUVER.
References Cited (Backward Citations)
US2977869A
Cited
US2959116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |