US3854865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kiln for ceramic products
Assignee: HENDRYX ENG Inc
•
Filing: 1973-11-09
•
Granted: 1974-12-17
•
Expires: 1993-11-09
Abstract
Abstract A kiln of relatively simple design is provided for firing ceramic ware. The kiln is of the shuttle type consisting generally of a rectangular refractory enclosure with a movable floor which may consist of cars supporting the ware. Burners of the excess air type are provided in the upper part of the kiln to induce downward flow of hot combustion gases through the ware. The hot gas exhausts into a system of ducts in the side walls of the kiln and a major part of the hot gas is returned to the burners for turbulent mixing with the products of combustion and recirculation through the ware.
Inventors
- 👤 G Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:33
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/30; F27B9/3005; F27B9/3011; F27B9/02; F27B9/021; F27B9/14; F27B9/20; F27B9/26; F27B9/262
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
A kiln for firing ceramic ware comprising a generally rectangular enclosure having movable floor means for supporting the ware and closing the bottom of the enclosure, said floor means being movable into and out of the kiln and having openings for flow of gas therethrough, means for inducing a recirculating flow of hot gases downward through the ware including a plurality of burners in the upper part of the kiln, means for supplying at least sufficient air to said burners for complete combustion to induce high velocity flow of combustion gases, said burners constituting the sole source of heat for the kiln, and means for exhausting gas flowing downward through said openings in the floor means and directing at least a part of said gas back to the burners for mixing with the combustion gases from the burners for recirculation downward through the ware.
Claim 2
Dependent Claim
144 words
A kiln for firing ceramic ware comprising a generally rectangular enclosure having movable floor means for supporting the ware and closing the bottom of the enclosure, said floor means being movable into and out of the kiln and having openings for flow of gas therethrough, means for inducing a recirculating flow of hot gases downward through the ware including a plurality of burners in the upper part of the kiln, means for supplying at least sufficient air to said burners for complete combustion to induce high velocity flow of combustion gases, said burners constituting the sole source of heat for the kiln, and means for exhausting gas flowing downward through said openings in the floor means and directing at least a part of said gas back to the burners for mixing with the combustion gases from the burners for recirculation downward through the ware.
Claim 3
Dependent Claim
27 words
A kiln as defined in claim 1 and including means for supplying excess air to said burners to provide a large volume of high velocity combustion gases.
Claim 4
Dependent Claim
22 words
A kiln as defined in claim 2 in which the burners are supported in the sides of the kiln above the ware.
Claim 5
Dependent Claim
36 words
A kiln as defined in claim 3 and including a block having a venturi passage therethrough disposed in front of each burner, said recirculated gas being directed to the spaces between the burners and said blocks.
Claim 6
Dependent Claim
37 words
A kiln as defined in claim 4 and including duct means in the sides of the kiln for receiving said gas exhausted through the floor means and directing at least part of the gas to said spaces.
Claim 7
Dependent Claim
48 words
A kiln as defined in claim 1 in which said floor means comprises a plurality of cars having passages for flow of gas therethrough, and means for effecting substantially gastight seals between the cars and between each car and the adjacent sides of the kiln below said passages.
Claim 8
Dependent Claim
122 words
A kiln for firing ceramic ware comprising an enclosing structure having side walls and a roof, movable floor means for Supporting the ware within the enclosing structure, a plurality of burners disposed in said walls above the ware, means for supplying excess air to said burners for combustion, said floor means permitting combustion gases to flow downward through the ware and including means for exhausting the gases laterally below the ware, a horizontal flue extending longitudinally in each side wall, ports in each wall in position to receive gases exhausted through the floor means and communicating with said horizontal flues, and vertical ducts in the side walls extending from the horizontal flues to each of said burners for recirculation of said gases.
Claim 9
Dependent Claim
122 words
A kiln for firing ceramic ware comprising an enclosing structure having side walls and a roof, movable floor means for Supporting the ware within the enclosing structure, a plurality of burners disposed in said walls above the ware, means for supplying excess air to said burners for combustion, said floor means permitting combustion gases to flow downward through the ware and including means for exhausting the gases laterally below the ware, a horizontal flue extending longitudinally in each side wall, ports in each wall in position to receive gases exhausted through the floor means and communicating with said horizontal flues, and vertical ducts in the side walls extending from the horizontal flues to each of said burners for recirculation of said gases.
Claim 10
Dependent Claim
21 words
A kiln as defined in claim 7 and including an exhaust stack at each end of each of said horizontal flues.
Claim 11
Dependent Claim
27 words
A kiln as defined in claim 7 and including venturi means associated with each burner for effectively mixing said recirculated gases with combustion gases from the burner.
Claim 12
Dependent Claim
35 words
A kiln as defined in claim 7 and including a block having a venturi passage therethrough disposed in front of each burner, said vertical ducts communicating with the spaces between the burners and said blocks.
Claim 13
Dependent Claim
44 words
A kiln as defined in claim 7 in which said floor means comprises a plurality of cars movable into and out of the kiln, and means for making substantially gas-tight seals between cars and between each car and the adjacent walls below said ports.
Claim 14
Dependent Claim
66 words
A kiln as defined in claim 11 in which each of said cars has an impervious base portion, an upper portion providing a floor surface for the kiln, said floor surface having openings for flow of combustion gases therethrough, and means for supporting said upper portion on the base portion, said supporting means providing passages for flow of said gases toward the sides of the car.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |