Patent US4660464A successfully refreshed from Google Patents.
US4660464A
Expired / Lapsed
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Clean air supply means in a clean tunnel
Assignee: Sanki Industrial Co Ltd
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Filing: 1985-08-30
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Granted: 1987-04-28
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Expires: 2005-08-30
Abstract
Abstract A plurality of air blowers spaced with each other are disposed along a side wall of a clean tunnel, thereby outer air is supplied into a tunnel zone by way of a filter. A clean air produced within the tunnel zone is circulated by disposing air outlets and a suction port in a zone of each blower. Thus, a constant clean air flow can be circulated without raising the temperature of the clean air within the clean tunnel.
Inventors
- 👤 Hirokuni Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:10
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/16; F24F3/167
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
In a clean tunnel having an upper tunnel zone including a conveying assembly and a filter disposed above the conveying assembly and a lower tunnel zone indicating a drive assembly for the conveying assembly, said upper and lower tunnels being partitioned by separator means, a clean air supply assembly comprising: a plurality of blowers disposed along said clean tunnel; an air duct in fluid communication with a discharge side of each of said plurality of blowers and with said upper tunnel zone above said filter disposed therein; and an air duct in fluid communication with a suction side of each of said plurality of blowers and with said lower tunnel zone thereby to provide a circulation of clean air within said clean tunnel.
Claim 2
Dependent Claim
123 words
In a clean tunnel having an upper tunnel zone including a conveying assembly and a filter disposed above the conveying assembly and a lower tunnel zone indicating a drive assembly for the conveying assembly, said upper and lower tunnels being partitioned by separator means, a clean air supply assembly comprising: a plurality of blowers disposed along said clean tunnel; an air duct in fluid communication with a discharge side of each of said plurality of blowers and with said upper tunnel zone above said filter disposed therein; and an air duct in fluid communication with a suction side of each of said plurality of blowers and with said lower tunnel zone thereby to provide a circulation of clean air within said clean tunnel.
Claim 3
Dependent Claim
53 words
The clean air supply assembly for a clean tunnel as defined in claim 1 and further including an auxiliary air outlet disposed in a side wall of said upper tunnel zone for fluid communication with said upper tunnel zone and a regulating plate having a weight hingeably mounted over said auxiliary air outlet.
Claim 4
Dependent Claim
35 words
The clean air supply assembly for a clean tunnel as defined in claim 1 and further including an auxiliary air port in fluid communication with said suction side of each of said plurality of blowers.
Claim 5
Dependent Claim
83 words
The clean air supply assembly for a clean tunnel as defined in claim 3 wherein a side wall of said tunnel is disposed between said lower tunnel zone and said air duct, said air duct in fluid communication with said suction side of said blower is formed with a lower air port, said lower air port and said auxiliary air port being dimensioned to provide 80 percent of said air flow to said suction side of said blower through said lower air port.
Claim 6
Dependent Claim
43 words
The clean air supply assembly for a clean tunnel as defined in claim 1 wherein said separator means include plate members defining a central channel and side channels, said central channel providing access for said conveying and drive assemblies through said clean tunnel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |