Patent US5195251A successfully refreshed from Google Patents.
US5195251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying kiln
Assignee: Individual
•
Filing: 1992-02-19
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Granted: 1993-03-23
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Expires: 2012-02-19
Abstract
Abstract A kiln and method for drying material. The kiln includes a drying chamber, a heating system for heating air to be delivered to the drying chamber, and a ducting system for delivering heated air to the drying chamber. Fans are provided for establishing a low air pressure region and a high air pressure region adjacent the ducting system in order to generate a circulation flow of air throughout the drying chamber. The ducting system is arranged to deliver heated air only into the low air pressure region of the fan to ensure proper mixing of the heated air from the ducting and recirculated air. In a second embodiment, the fans are reversible to permit air flow through the drying chamber to be reversed.
Inventors
- 👤 Frank T. Gyurcsek
- 👤 Martin G. Gyurcsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:53
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/20; F26B21/202; F26B21/204
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A kiln for drying material, comprising: a drying chamber; means for heating air to be delivered to the drying chamber; passage means for delivering heated air to the drying chamber, comprising a pair of ducts extending substantially the length of the drying chamber; means for establishing a low air pressure region and a high air pressure region adjacent the pair of ducts in order to generate a circulation flow of heated air throughout the drying chamber; venting means in the pair of ducts to permit heated air to exit from the ducts; and valve means for controlling heated air flow in the pair of ducts such that heated air is always directed to the duct adjacent the low air pressure region; said means for establishing a low air pressure region and a high air pressure region permitting periodic switching of said regions to reverse circulation of the air flow within the drying chamber with coordinated switching of the valve means such that heated air is always directed to the low air pressure region.
Claim 2
Dependent Claim
173 words
A kiln for drying material, comprising: a drying chamber; means for heating air to be delivered to the drying chamber; passage means for delivering heated air to the drying chamber, comprising a pair of ducts extending substantially the length of the drying chamber; means for establishing a low air pressure region and a high air pressure region adjacent the pair of ducts in order to generate a circulation flow of heated air throughout the drying chamber; venting means in the pair of ducts to permit heated air to exit from the ducts; and valve means for controlling heated air flow in the pair of ducts such that heated air is always directed to the duct adjacent the low air pressure region; said means for establishing a low air pressure region and a high air pressure region permitting periodic switching of said regions to reverse circulation of the air flow within the drying chamber with coordinated switching of the valve means such that heated air is always directed to the low air pressure region.
Claim 3
Dependent Claim
29 words
A kiln as claimed in claim 1 in which the means for establishing a low air pressure region and a high air pressure region comprise at least one fan.
Claim 4
Dependent Claim
41 words
A kiln as claimed in claim 1 in which the means for establishing a low and high air pressure region comprises at least one fan mounted for swivelable movement about an axis parallel to the plane or rotation of the fan.
Claim 5
Dependent Claim
31 words
A kiln as claimed in claim 1 in which the means for establishing a low and high air pressure region comprises at least one fan having a reversible direction of rotation.
Claim 6
Dependent Claim
30 words
A kiln as claimed in claim 1 in which the venting means comprises a slot extending the length of each duct and opening toward opposite sides of the drying chamber.
Claim 7
Dependent Claim
37 words
A kiln as claimed in claim 1 in which the valve means comprises a baffle plate movable to direct heated air into the duct of said pair of ducts that is adjacent the low air pressure region.
Claim 8
Dependent Claim
46 words
A kiln as claimed in claim 1 in which the passage means and the means for establishing a low air pressure region and a high air pressure region are located in an enclosed region above the drying chamber that is in communication with the drying chamber.
Claim 9
Dependent Claim
25 words
A kiln as claimed in claim 7 in which the enclosed region is formed with a domed upper surface to assist in directing air flow.
Claim 10
Independent Claim
146 words
A method for drying material in the drying chamber of a kiln, comprising: delivering heated air to the drying chamber through a pair of ducts extending substantially the length of the drying chamber; establishing a low air pressure region adjacent to one of the ducts and a high air pressure region adjacent to other of the ducts in order to generate a circulation flow of heated air throughout the drying chamber; controlling the heated air flow with valve means such that substantially all the flow is delivered to the duct adjacent to the low air pressure region and heated air exits from said duct into the low air pressure region; and periodically switching said regions to reverse circulation of the air flow with coordinated switching of the valve means such that heated air is always directed to the duct adjacent to the low air pressure region.
Claim 11
Independent Claim
146 words
A method for drying material in the drying chamber of a kiln, comprising: delivering heated air to the drying chamber through a pair of ducts extending substantially the length of the drying chamber; establishing a low air pressure region adjacent to one of the ducts and a high air pressure region adjacent to other of the ducts in order to generate a circulation flow of heated air throughout the drying chamber; controlling the heated air flow with valve means such that substantially all the flow is delivered to the duct adjacent to the low air pressure region and heated air exits from said duct into the low air pressure region; and periodically switching said regions to reverse circulation of the air flow with coordinated switching of the valve means such that heated air is always directed to the duct adjacent to the low air pressure region.
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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) | 1996-03-22 | 1996-09-21 | 1997-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-22 | 2000-09-21 | 2001-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-22 | 2004-09-21 | 2005-03-23 | $7700.00 | Window Closed / Lapsed |