Patent US4073243A successfully refreshed from Google Patents.
US4073243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial furnace roof assembly and components thereof
Assignee: Merkle and Associates Inc
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Filing: 1976-12-01
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Granted: 1978-02-14
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Expires: 1996-12-01
Abstract
Abstract A high temperature industrial furnace roof assembly wherein two refractory bricks are held in adjacent position by suitable securement and have a hanger rod extending from the assembly to suspend the roof assembly from a support structure in desired position in a furnace roof. The hanger rod is maintained in locked position when the weight of the roof assembly is placed upon it. The hanger rod may be depressed into the refractory bricks permitting free rotation of the hanger rod with respect to the hanger and brick assembly and locked into desired position at 90° increments by a force applied to the hanger rod in a direction away from the brick assembly. The roof assembly of this invention is particularly desirable for furnace roof repair and provides for easy installation in operating high temperature furnaces permitting the long axes of the repair assembly to be changed on the jobsite by rotation of the hanger.
Inventors
- 👤 Frank P. Merkle, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:23
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/021
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
148 words
A high temperature industrial furnace roof assembly comprising: two refractory bricks having adjacent faces, opposing hanger recesses, locking means well beneath said recesses, hanger rod hole extending from said recesses to the exterior of the top of said assembly, said refractory bricks held in adjacent position by securement means; a hanger rod having locking means at one end and a hook at the other end; a hanger having opposed refractory engaging projections adapted to fit said hanger recesses, a hanger rod hole allowing free rotation about said hanger rod one end above said locking means and locking engagement means which when engaged with said locking means prevents rotation of said hanger rod in relation to said hanger at 90° increments and provides that depression of said one end of said hanger rod into said locking means well permits rotation of said hanger rod with respect to said hanger.
Claim 2
Dependent Claim
148 words
A high temperature industrial furnace roof assembly comprising: two refractory bricks having adjacent faces, opposing hanger recesses, locking means well beneath said recesses, hanger rod hole extending from said recesses to the exterior of the top of said assembly, said refractory bricks held in adjacent position by securement means; a hanger rod having locking means at one end and a hook at the other end; a hanger having opposed refractory engaging projections adapted to fit said hanger recesses, a hanger rod hole allowing free rotation about said hanger rod one end above said locking means and locking engagement means which when engaged with said locking means prevents rotation of said hanger rod in relation to said hanger at 90° increments and provides that depression of said one end of said hanger rod into said locking means well permits rotation of said hanger rod with respect to said hanger.
Claim 3
Dependent Claim
25 words
The high temperature industrial furnace roof assembly of claim 1 wherein said locking means at one end of said hanger rod is a square head.
Claim 4
Dependent Claim
42 words
The high temperature industrial furnace roof assembly of claim 1 wherein said locking means at one end is a square shaft portion of said hanger rod and said hanger rod has a head portion below and larger than said square shaft portion.
Claim 5
Dependent Claim
28 words
The high temperature industrial furnace roof assembly of claim 1 wherein said locking engagement means are two opposing lugs extending beneath said hanger rod hole in said hanger.
Claim 6
Dependent Claim
24 words
The high temperature industrial furnace roof assembly of claim 1 wherein said locking engagement means is a square cross section shaped hanger rod hole.
Claim 7
Dependent Claim
24 words
The high temperature industrial furnace roof assembly of claim 1 wherein said hanger rod extends obliquely to said hook from above said refractory bricks.
Claim 8
Dependent Claim
29 words
The high temperature industrial furnace roof assembly of claim 1 wherein said securement means is a cold rolled steel can encasing the sides and bottom of said repair assembly.
Claim 9
Dependent Claim
17 words
The high temperature industrial furnace roof assembly of claim 1 wherein said securement means are metal strapping.
Claim 10
Dependent Claim
16 words
The high temperature industrial furnace roof assembly of claim 1 wherein said securement means are wire.
Claim 11
Dependent Claim
17 words
The high temperature industrial furnace roof assembly of claim 1 wherein said securement means are fiberglass tape.
Claim 12
Dependent Claim
114 words
A hanger assembly for use in high temperature industrial furnace roofs comprising a hanger rod having locking means at one end and a hook at the other end; a hanger having opposed refractory engaging projections adapted to fit hanger recesses in adjacent refractory bricks, a hanger rod hole allowing free rotation about said hanger rod one end above said locking means and locking engagement means which when engaged with said locking means prevents rotation of said hanger rod in relation to said hanger at 90° increments and provides that depression of said one end of said hanger rod disengages said locking means and permits rotation of said hanger rod with respect to said hanger.
Claim 13
Dependent Claim
114 words
A hanger assembly for use in high temperature industrial furnace roofs comprising a hanger rod having locking means at one end and a hook at the other end; a hanger having opposed refractory engaging projections adapted to fit hanger recesses in adjacent refractory bricks, a hanger rod hole allowing free rotation about said hanger rod one end above said locking means and locking engagement means which when engaged with said locking means prevents rotation of said hanger rod in relation to said hanger at 90° increments and provides that depression of said one end of said hanger rod disengages said locking means and permits rotation of said hanger rod with respect to said hanger.
Claim 14
Dependent Claim
29 words
The hanger assembly of claim 11 wherein said locking means is a square head and said locking engagement means are two opposing lugs extending beneath said hanger rod hole.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |