Patent US3256798A successfully refreshed from Google Patents.
US3256798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for generating an air barrier
Assignee: Individual
•
Filing: 1963-09-17
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Granted: 1966-06-21
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Expires: 1983-09-17
Abstract
No abstract record available.
Inventors
- 👤 Herman M Melzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:08
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A DEVICE FOR GENERATING AN AIR FLOW OF PRESCRIBED DIMENSION, VELOCITY, AND DIRECTION TO FORM A BARRIER WHICH IS EXTENDED ACROSS AN ACCESS DOOR TO OTHER OPENING TO FORM AN OBSTRUCTION FOR INSECTS AND SERVING AS A BARRIER TO THE TRANSITION OF HEAT THEREACROSS, COMPRISING A CASING HAVING AN INTERNAL VOLUTE-SHAPED CHAMBER TERMINATING IN A NARROW SLOT FORMING AN OUTLET FROM SAID VOLUTE CHAMBER, A PLURALITY OF SPACED DIRECTING VANES DISPOSED IN SAID SLOT ANGULARLY MOVABLE THEREIN A SHAPE THE FLOW OF AIR AS IT PASSES THROUGH THE SLOT, A PAIR OF SPACED PUMPING ELEMENTS LOCATED INTERIORLY OF SAID CHAMBER, MOUNTING MEANS FOR SAID PUMPING ELEMENTS WHICH EXTEND THROUGH SAID CHAMBER IN THE FORM OF RELATIVELY THIN MEMBERS HAVING PLATE-LIKE CONFIGURATION EXTENDING ACROSS THE CHAMBER AND DISPOSED EDGEWISE TO THE FLOW OF AIR WITHIN SAID CASING, SAID MOUNTING MEANS SERVING TO MOUNT SAID PAIR OF SPACED PUMPING ELEMENTS WITHIN SAID CHAMBER, MEANS FOR SECURING SAID MOUNTING MEANS TO SAID CASING THROUGH AS WALL THEREOF WHICH SUSPENDS SAID DEVICE IN ITS OPERATIVE POSITION MOTOR MEANS FOR OPERATING SAID ROTATABLE PUMPING MEANS AND ALSO DIS-
Claim 2
Independent Claim
183 words
A DEVICE FOR GENERATING AN AIR FLOW OF PRESCRIBED DIMENSION, VELOCITY, AND DIRECTION TO FORM A BARRIER WHICH IS EXTENDED ACROSS AN ACCESS DOOR TO OTHER OPENING TO FORM AN OBSTRUCTION FOR INSECTS AND SERVING AS A BARRIER TO THE TRANSITION OF HEAT THEREACROSS, COMPRISING A CASING HAVING AN INTERNAL VOLUTE-SHAPED CHAMBER TERMINATING IN A NARROW SLOT FORMING AN OUTLET FROM SAID VOLUTE CHAMBER, A PLURALITY OF SPACED DIRECTING VANES DISPOSED IN SAID SLOT ANGULARLY MOVABLE THEREIN A SHAPE THE FLOW OF AIR AS IT PASSES THROUGH THE SLOT, A PAIR OF SPACED PUMPING ELEMENTS LOCATED INTERIORLY OF SAID CHAMBER, MOUNTING MEANS FOR SAID PUMPING ELEMENTS WHICH EXTEND THROUGH SAID CHAMBER IN THE FORM OF RELATIVELY THIN MEMBERS HAVING PLATE-LIKE CONFIGURATION EXTENDING ACROSS THE CHAMBER AND DISPOSED EDGEWISE TO THE FLOW OF AIR WITHIN SAID CASING, SAID MOUNTING MEANS SERVING TO MOUNT SAID PAIR OF SPACED PUMPING ELEMENTS WITHIN SAID CHAMBER, MEANS FOR SECURING SAID MOUNTING MEANS TO SAID CASING THROUGH AS WALL THEREOF WHICH SUSPENDS SAID DEVICE IN ITS OPERATIVE POSITION MOTOR MEANS FOR OPERATING SAID ROTATABLE PUMPING MEANS AND ALSO DIS-
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |