US4136625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame injection throats for furnaces
Assignee: POULTON AND SON REFRACTORIES Ltd
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Filing: 1977-06-07
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Granted: 1979-01-30
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Expires: 1997-06-07
Abstract
Abstract A flame injection throat for a furnace incorporates a furnace structure formed with a flame injection throat opening lined by at least one ring of refractory tiles the adjacent edge portions of the outer faces of selected adjacent tiles are formed with aligned undercut grooves. Pins having enlarged ends are attached to the furnace structure within the throat opening and project into the groove. Locking members fitted into the grooves engage simultaneously the undercut portions of the grooves in the tiles and the enlarged ends of the pins lying within the grooves whereby to hold the tiles to the pins. Each locking member is a block of heat-resisting metal presenting two limbs arranged to straddle a pin projecting into the groove.
Inventors
- 👤 John S. Corbet
- 👤 John Basford
- 👤 James R. Hemming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:44
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/02; F23M5/025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
187 words
A flame injection throat for a furnace comprising a furnace structure having an opening and at least one ring of refractory tiles lining the inner face of the opening forming the flame injection throat, the adjacent edge portions of the outer faces of selected adjacent tiles being formed with undercut grooves wider at the bottom than the top, said grooves extending inwardly from the adjacent end faces of the tiles in alignment with one another, pins having enlarged ends attached to the furnace structure within the throat opening and projecting into grooves in the tiles so that the enlarged ends are within the grooves and locking members fitted into the grooves and engaging simultaneously the undercut portions of the grooves in the tiles and the enlarged ends of the pins whereby to hold the tiles to the pins each of said locking members being a block of heat-resisting metal bifurcated along a portion of its length whereby to present two limbs arranged when fitted into a groove in a tile to straddle a pin projecting into the groove and simultaneously engage the undercut portion of the groove.
Claim 2
Dependent Claim
187 words
A flame injection throat for a furnace comprising a furnace structure having an opening and at least one ring of refractory tiles lining the inner face of the opening forming the flame injection throat, the adjacent edge portions of the outer faces of selected adjacent tiles being formed with undercut grooves wider at the bottom than the top, said grooves extending inwardly from the adjacent end faces of the tiles in alignment with one another, pins having enlarged ends attached to the furnace structure within the throat opening and projecting into grooves in the tiles so that the enlarged ends are within the grooves and locking members fitted into the grooves and engaging simultaneously the undercut portions of the grooves in the tiles and the enlarged ends of the pins whereby to hold the tiles to the pins each of said locking members being a block of heat-resisting metal bifurcated along a portion of its length whereby to present two limbs arranged when fitted into a groove in a tile to straddle a pin projecting into the groove and simultaneously engage the undercut portion of the groove.
Claim 3
Dependent Claim
34 words
A flame injection throat for a furnace incorporating several coaxial rings of refractory tiles lining the throat opening in which the tiles of at least selected rings are attached as claimed in claim 1.
Claim 4
Dependent Claim
53 words
A flame injection throat as claimed in claim 1 in which one end face of each pair of adjacent end faces presented by adjacent tiles is formed with a tongue disposed in an axial direction with respect to the throat, the other end face being formed with a groove engaged by the tongue.
Claim 5
Dependent Claim
52 words
A flame injection throat as claimed in claim 2 in which all the faces of the tiles of one ring forming one end face of the ring of tiles are formed with tongues, the abutting end faces of the tiles of the other ring being formed with grooves engaged by the tongues.
Claim 6
Dependent Claim
22 words
A flame injection throat as claimed in claim 2 in which the abutting faces of adjacent tiles are stepped into one another.
Claim 7
Dependent Claim
18 words
A flame injection throat as claimed in claim 1 in which the undercut grooves are of dovetail form.
Claim 8
Dependent Claim
19 words
A flame injection throat as claimed in claim 1 in which the undercut grooves are tee-shaped in cross section.
Claim 9
Dependent Claim
33 words
A flame injection throat as claimed in claim 1 in which the pins are screw-threaded pins, and nuts screwed on to the ends of the pins forming the enlarged ends of the pins.
Claim 10
Dependent Claim
26 words
A flame injection throat as claimed in claim 1 in which the pins are bolts, the enlarged ends being constituted by the heads of the bolts.
Claim 11
Dependent Claim
62 words
A locking member for use in a flame injection throat as claimed in claim 1 wherein each limb is formed with an outwardly projecting flange extending lengthwise of the limb and an inwardly projecting flange also extending lengthwise of the limb the outwardly projecting flanges engaging the undercut portion and the inwardly projecting flanges engaging under the enlarged end of the pin.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |