US3897229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual action laminar air flow
Assignee: Henley Group Inc
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Filing: 1974-01-25
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Granted: 1975-07-29
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Expires: 1994-01-25
Abstract
Abstract A multiple compartment air exhaust system comprising first and second compartments, the first compartment having a first air inlet located in its upper portion and a first exhaust opening located in its lower portion, the second compartment having a second air inlet located in its lower portion and a second exhaust opening located in its upper portion. The first exhaust opening is connected to the second air inlet by means of a conduit and means is provided for providing a positive air flow through the first air inlet, first compartment and first exhaust opening through the conduit, the second air inlet, the second compartment and the second exhaust opening.
Inventors
- 👤 George J Lada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; B; B01; B01D; B01D46/00; B08; B08B; B08B15/00; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
176 words
A MULTIPLE COMPARTMENT AIR EXHAUST SYSTEM COMPRISING: FIRST AND SECOND SEPARATED COMPARTMENTS, A FIRST AIR INLET LOCATED IN THE UPPER PORTION OF THE FIRST COMPARTMENTS, A FIRST EXHAUST OPENING LOCATED IN THE LOWER PORTION OF THE FIRST COMPARTMENT, A SECOND AIR INLET LOCATED IN THE LOWER PORTION OF THE SECOND COMPARTMENT, A CONDUIT CONNECTING THE FIRST EXHAUST OPENING AND THE SECOND AIR INLET, A SECOND EXHAUST OPENING LOCATED IN THE UPPER PORTION OF THE SECOND COMPARTMENT, AND MEANS CONNECTED TO SAID FIRST COMPARTMENT FOR PROVIDING A POSITIVE FLOW OF AIR THROUGH THE FIRST AIR INLET DOWNWARDLY THROUGH THE FIRST COMPARTMENT INTO THE FIRST EXHAUST OPENING, THROUGH THE CONDUIT TO THE SECOND AIR INLET, THROUGH THE SECOND AIR INLET UPWARDLY THROUGH THE SECOND COMPARTMENT AND THROUGH THE SECOND EXHAUST OPENING, EACH OF SAID COMPARTMENTS BEING PROVIDED WITH AN OPENABLE FRONT PORTION AND A WORKING SURFACE IN ITS LOWER PORTION, THE FIRST EXHAUST OPENING AND THE SECOND AIR INLET EACH BEING A GRILL LOCATED IN THE WORKING SURFACE ALONG THE LENGTH OF AND PROXIMATE TO THE FRONT PORTION.
Claim 2
Dependent Claim
176 words
A MULTIPLE COMPARTMENT AIR EXHAUST SYSTEM COMPRISING: FIRST AND SECOND SEPARATED COMPARTMENTS, A FIRST AIR INLET LOCATED IN THE UPPER PORTION OF THE FIRST COMPARTMENTS, A FIRST EXHAUST OPENING LOCATED IN THE LOWER PORTION OF THE FIRST COMPARTMENT, A SECOND AIR INLET LOCATED IN THE LOWER PORTION OF THE SECOND COMPARTMENT, A CONDUIT CONNECTING THE FIRST EXHAUST OPENING AND THE SECOND AIR INLET, A SECOND EXHAUST OPENING LOCATED IN THE UPPER PORTION OF THE SECOND COMPARTMENT, AND MEANS CONNECTED TO SAID FIRST COMPARTMENT FOR PROVIDING A POSITIVE FLOW OF AIR THROUGH THE FIRST AIR INLET DOWNWARDLY THROUGH THE FIRST COMPARTMENT INTO THE FIRST EXHAUST OPENING, THROUGH THE CONDUIT TO THE SECOND AIR INLET, THROUGH THE SECOND AIR INLET UPWARDLY THROUGH THE SECOND COMPARTMENT AND THROUGH THE SECOND EXHAUST OPENING, EACH OF SAID COMPARTMENTS BEING PROVIDED WITH AN OPENABLE FRONT PORTION AND A WORKING SURFACE IN ITS LOWER PORTION, THE FIRST EXHAUST OPENING AND THE SECOND AIR INLET EACH BEING A GRILL LOCATED IN THE WORKING SURFACE ALONG THE LENGTH OF AND PROXIMATE TO THE FRONT PORTION.
Claim 3
Dependent Claim
39 words
The dual compartment exhaust system claimed in claim 1 wherein the first and second compartment are separated by a baffle which permits passage of an article from the first to the second compartment by means of a conveying mechanism.
Claim 4
Dependent Claim
32 words
The air exhaust system of claim 2 wherein the means for providing a positive flow of air comprises an air blower for blowing air through the first inlet into the first compartment.
Claim 5
Dependent Claim
37 words
The air exhaust system of claim 3 wherein the means for providing a positive flow of air further comprises an air exhaust device to assist in pulling air from the second compartment through the second exhaust opening.
Claim 6
Dependent Claim
24 words
The air exhaust system of claim 4 wherein the air provided by the air blower passes through a filter before entering the first compartment.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |