Patent FR798681A successfully refreshed from Google Patents.
US4069633A
Expired / Lapsed
US
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Refractory wall structures
Assignee: Morgan Refractories Ltd
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Filing: 1976-04-19
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Granted: 1978-01-24
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Expires: 1996-04-19
Abstract
Abstract A refractory furnace lining or like wall structure is built as a dry wall from unfired, relatively large and heavy, basically rectangular blocks fitted closely together and tied by refractory rod-like keys in opposed pairs of grooves in the blocks. A wall built of such blocks is fired in situ.
Inventors
- 👤 Charles Frank Cooper
- 👤 Robert Greer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:34
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; E; E04; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2/06; E04B2/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
165 words
A refractory wall structure built of refractory blocks and keys as a dry wall and comprising, in combination: a. a plurality of blocks of pre-formed refractory material, said pre-formed refractory material being dried but not fired and having sufficient strength for transportation and building, said blocks being rectangular in basic outline shape and having as high a weight as is convenient for manipulation by one operative; b. said blocks being arranged in a wall structure in which the blocks are laid in mutual contact in a plurality of horizontal courses with overlapping of blocks in vertically successive horizontal courses and with the blocks of each upper course resting on the blocks of the next lower course; c. the upper and lower faces of the blocks having complementary grooves within said faces, said grooves being mutually opposed between said vertically successive horizontal courses to form, conjointly, a horizontal tubular key-way extending along and within the wall between each of said plurality of vertically successive horizontal courses;
Claim 2
Dependent Claim
165 words
A refractory wall structure built of refractory blocks and keys as a dry wall and comprising, in combination: a. a plurality of blocks of pre-formed refractory material, said pre-formed refractory material being dried but not fired and having sufficient strength for transportation and building, said blocks being rectangular in basic outline shape and having as high a weight as is convenient for manipulation by one operative; b. said blocks being arranged in a wall structure in which the blocks are laid in mutual contact in a plurality of horizontal courses with overlapping of blocks in vertically successive horizontal courses and with the blocks of each upper course resting on the blocks of the next lower course; c. the upper and lower faces of the blocks having complementary grooves within said faces, said grooves being mutually opposed between said vertically successive horizontal courses to form, conjointly, a horizontal tubular key-way extending along and within the wall between each of said plurality of vertically successive horizontal courses;
Claim 3
Dependent Claim
114 words
d. a plurality of discrete rod-like keys of fired refractory material extending end to end horizontally through each of said tubular key-ways with a clearance but occupying respective mutually opposed grooves of adjacent blocks sufficiently to lock the respective blocks against sliding out of the plane of the wall, said keys being elongate and extending across a plurality of blocks in each course and resting with a clearance in the groove in the upper faces of the blocks of a respective lower course but projecting above said groove into the complementary groove in the lower face of the blocks of a respective upper course by a substantial part of the thickness of the keys.
Claim 4
Dependent Claim
114 words
d. a plurality of discrete rod-like keys of fired refractory material extending end to end horizontally through each of said tubular key-ways with a clearance but occupying respective mutually opposed grooves of adjacent blocks sufficiently to lock the respective blocks against sliding out of the plane of the wall, said keys being elongate and extending across a plurality of blocks in each course and resting with a clearance in the groove in the upper faces of the blocks of a respective lower course but projecting above said groove into the complementary groove in the lower face of the blocks of a respective upper course by a substantial part of the thickness of the keys.
Claim 5
Dependent Claim
15 words
A refractory wall structure according to claim 1 wherein said blocks have low thermal conductivity.
Claim 6
Dependent Claim
29 words
A refractory wall structure according to claim 1, in which the grooves are offset, nearer the faces of the blocks at the back of the wall than the front.
Claim 7
Dependent Claim
17 words
A refractory wall structure according to claim 3, in which the blocks are of plain rectangular shape.
Claim 8
Dependent Claim
75 words
A refractory wall structure according to claim 3, in which full-size blocks, of basic rectangular outline shape, each have in the upper and lower faces a waisted recess between two co-planar borders, each recess has a central plane base parallel to and of a width slightly greater than the sum of the border widths, and symmetrical sloping sides leading from the base to the borders respectively, the angle of slope being between 10° and 45°.
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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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |