US3120798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic discharge housing
Assignee: VENTROLA Manufacturing Co
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Filing: 1961-05-31
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Granted: 1964-02-11
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Albert E Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
MEANS FOR AUTOMATICALLY CONTROLLING THE DISCHARGE OF AIR FROM VENTILATION FANS AND THE LIKE, COMPRISING: A DISCHARGE HOUSING HAVING; AN INSIDE WALL PORTION AND AN OUTSIDE WALL PORTION DISPOSED GENERALLY OPPOSITE SAID INSIDE WALL PORTION AN INLET OPENING IN SAID INSIDE WALL PORTION ADAPTED TO RECEIVE THE DISCHARGE FLOW FROM A FAN; A FIRST DISCHARGE OPENING POSITIONED IN SAID OUTSIDE WALL PORTION AND A SECOND DISCHARGE OPENING POSITIONED BETWEEN SAID INSIDE AND OUTSIDE WALL PORTIONS; A FIRST SHUTTER PIVOTALLY MOUNTED ON SAID HOUSING FOR CONTROLLING THE FLOW OF AIR THROUGH ONE OF SAID DISCHARGE OPENINGS; A SECOND SHUTTER PIVOTALLY MOUNTED ON SAID HOUSING FOR CONTROLLING THE FLOW OF AIR THROUGH THE OTHER OF SAID DISCHARGE OPENINGS; LINKAGE MEANS INTERCONNECTING SAID FIRST AND SECOND SHUTTERS SO THAT BOTH OF SAID SHUTTERS WILL OPEN AND CLOSE TOGETHER; MEANS BIASING BOTH SAID SHUTTERS TOWARD CLOSED POSITION; AND MEANS DISPOSED WITHIN AND HOUSING FOR DIRECTING AIR FROM THE FAN AGAINST ONE OF SAID SHUTTERS SO THAT THE FORCE THEREOF WILL OVERCOME THE EFFECT OF SAID BIASING MEANS AND CAUSE THE LATTER TO PIVOT TO AN OPEN POSITION.
Claim 2
Dependent Claim
183 words
MEANS FOR AUTOMATICALLY CONTROLLING THE DISCHARGE OF AIR FROM VENTILATION FANS AND THE LIKE, COMPRISING: A DISCHARGE HOUSING HAVING; AN INSIDE WALL PORTION AND AN OUTSIDE WALL PORTION DISPOSED GENERALLY OPPOSITE SAID INSIDE WALL PORTION AN INLET OPENING IN SAID INSIDE WALL PORTION ADAPTED TO RECEIVE THE DISCHARGE FLOW FROM A FAN; A FIRST DISCHARGE OPENING POSITIONED IN SAID OUTSIDE WALL PORTION AND A SECOND DISCHARGE OPENING POSITIONED BETWEEN SAID INSIDE AND OUTSIDE WALL PORTIONS; A FIRST SHUTTER PIVOTALLY MOUNTED ON SAID HOUSING FOR CONTROLLING THE FLOW OF AIR THROUGH ONE OF SAID DISCHARGE OPENINGS; A SECOND SHUTTER PIVOTALLY MOUNTED ON SAID HOUSING FOR CONTROLLING THE FLOW OF AIR THROUGH THE OTHER OF SAID DISCHARGE OPENINGS; LINKAGE MEANS INTERCONNECTING SAID FIRST AND SECOND SHUTTERS SO THAT BOTH OF SAID SHUTTERS WILL OPEN AND CLOSE TOGETHER; MEANS BIASING BOTH SAID SHUTTERS TOWARD CLOSED POSITION; AND MEANS DISPOSED WITHIN AND HOUSING FOR DIRECTING AIR FROM THE FAN AGAINST ONE OF SAID SHUTTERS SO THAT THE FORCE THEREOF WILL OVERCOME THE EFFECT OF SAID BIASING MEANS AND CAUSE THE LATTER TO PIVOT TO AN OPEN POSITION.
References Cited (Backward Citations)
CA497707A
Cited
US2141923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |