US3115818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air confined system
Assignee: AMF Inc
•
Filing: 1960-06-17
•
Granted: 1963-12-31
•
Expires: 1980-06-17
Abstract
No abstract record available.
Inventors
- 👤 Richard A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
F; F24; F24F; F24F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
AN APPARATUS COMPRISING A CHAMBER FOR PREVENTING PASSAGE OF AIR FROM THE CHAMBER, SAID CHAMBER HAVING AN EXPOSED INGRESS AND AN EXPOSED EGRESS AND BEING SITUATED IN A SURROUNDING ROOM OPEN TO, AND ALLOWING FREE PASSAGE OF SOLID ARTICLES THERETHROUGH, SAID CHAMBER HAVING ITS ENDS OPEN AND HAVING A HOLLOW FRAME EXTENDING AROUND THE SIDES AND TOP OF EACH OPENING, AIR INTAKE APERTURES SPACED WITHIN THE PERIPHERY OF SAID FRAME AND DIRECTED TOWARD THE OPENING TO ALLOW WITHDRAWAL OF AIR FROM AT LEAST A SUBSTANTIAL PORTION OF THE INNER PERIPHERAL DISTANCE OF THE FACE OF SAID FRAMES, A HEADER DUCT COMMUNICATING WITH SAID HOLLOW FRAMES, AN AIR EXHAUSTING DEVICE CONNECTED BY AN AIR PASSAGE WITH SAID HEADER DUCT, DAMPER MEANS IN SAID HEADER DUCT ADJACENT TO EACH HOLLOW FRAME FOR COORDINATING THE QUANTITY OF EXHAUST DRAWN FROM SAID APERTURES AT THE INGRESS AND EGRESS OF SAID CHAMBER TO MAINTAIN EQUILIBRIUM IN SAID CHAMBER, AND ACTUATING MEANS FOR OPERATING SAID AIR EXHAUSTING DEVICE TO CONTINUOUSLY WITHDRAW AIR THROUGH SAID APERTURES INTO SAID HOLLOW FRAMES AND HEADER DUCT AND TO DIRECT SAID AIR TO THE EXTERIOR OF SAID SURROUNDING ROOM.
Claim 2
Independent Claim
188 words
AN APPARATUS COMPRISING A CHAMBER FOR PREVENTING PASSAGE OF AIR FROM THE CHAMBER, SAID CHAMBER HAVING AN EXPOSED INGRESS AND AN EXPOSED EGRESS AND BEING SITUATED IN A SURROUNDING ROOM OPEN TO, AND ALLOWING FREE PASSAGE OF SOLID ARTICLES THERETHROUGH, SAID CHAMBER HAVING ITS ENDS OPEN AND HAVING A HOLLOW FRAME EXTENDING AROUND THE SIDES AND TOP OF EACH OPENING, AIR INTAKE APERTURES SPACED WITHIN THE PERIPHERY OF SAID FRAME AND DIRECTED TOWARD THE OPENING TO ALLOW WITHDRAWAL OF AIR FROM AT LEAST A SUBSTANTIAL PORTION OF THE INNER PERIPHERAL DISTANCE OF THE FACE OF SAID FRAMES, A HEADER DUCT COMMUNICATING WITH SAID HOLLOW FRAMES, AN AIR EXHAUSTING DEVICE CONNECTED BY AN AIR PASSAGE WITH SAID HEADER DUCT, DAMPER MEANS IN SAID HEADER DUCT ADJACENT TO EACH HOLLOW FRAME FOR COORDINATING THE QUANTITY OF EXHAUST DRAWN FROM SAID APERTURES AT THE INGRESS AND EGRESS OF SAID CHAMBER TO MAINTAIN EQUILIBRIUM IN SAID CHAMBER, AND ACTUATING MEANS FOR OPERATING SAID AIR EXHAUSTING DEVICE TO CONTINUOUSLY WITHDRAW AIR THROUGH SAID APERTURES INTO SAID HOLLOW FRAMES AND HEADER DUCT AND TO DIRECT SAID AIR TO THE EXTERIOR OF SAID SURROUNDING ROOM.
References Cited (Backward Citations)
US1580957A
Cited
US1987410A
Cited
DE755299C
Cited
US2516432A
Cited
US2590850A
Cited
US2775187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |