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US3705253A Expired / Lapsed US ⏱️ 0.0 years remaining

Furnace wall construction

Assignee: Lee Wilson Engineering Co Inc
•
Filing: 1971-09-02
•
Granted: 1972-12-05
•
Expires: 1991-09-02
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Abstract

Abstract An efficient and inexpensive wall construction is provided for an electric furnace of the resistance type in which breakage is minimized and parts are easily replaced if breakage does occur. The furnace lining extends over the inside wall of the furnace and includes ceramic panels designed to receive and support electrical resistance elements, such as resistor ribbon or the like. In one form the lining comprises a layer of fibrous ceramic insulating material which is supported on the inside of a furnace outer wall or shell. Headed fastener studs extend through the insulating material and are secured to the furnace shell with their heads spaced therefrom. The ceramic heating element support panels are removably mounted on the fastener studs and held in place by the headed ends thereof. In a preferred form of the construction the ceramic panels are disposed in horizontal rows whereby the panels of one row rest on and are partially supported by the panels of the row below.

Inventors

  • 👤 Gerald W Hicks

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 08:21
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; H; H05; H05B; H05B3/00; H05B3/62; H05B3/66

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 95 words
A furnace wall construction including a furnace shell, an insulating liner layer supported on said shell, resistor hanger panel fastening studs penetrating said insulating layer and having one end portion secured to said furnace shell and an opposite end portion extending inwardly beyond said insulating layer, a plurality of ceramic resistor hanger panel members removably mounted on said opposite end portions of said fastening studs and held in position thereby, said panel members having heating element supporting projections extending inwardly away from said insulating layer, and an electrical resistance heating element supported on said projections.
Claim 2
Dependent Claim 95 words
A furnace wall construction including a furnace shell, an insulating liner layer supported on said shell, resistor hanger panel fastening studs penetrating said insulating layer and having one end portion secured to said furnace shell and an opposite end portion extending inwardly beyond said insulating layer, a plurality of ceramic resistor hanger panel members removably mounted on said opposite end portions of said fastening studs and held in position thereby, said panel members having heating element supporting projections extending inwardly away from said insulating layer, and an electrical resistance heating element supported on said projections.
Claim 3
Dependent Claim 38 words
The furnace wall construction of claim 1 in which said fastening studs have enlarged head means on said opposite end portions, said head means engaging said panel members and retaining same against movement away from said insulating layer.
Claim 4
Dependent Claim 26 words
The furnace wall construction of claim 2 in which said panel members have cavities adapted to receive and enclose said head means of said fastening studs.
Claim 5
Dependent Claim 38 words
The furnace wall construction of claim 3 in which the cavities in said panel members have openings adapted to pass said head means of said studs and undercut upper portions adapted to receive and retain said head means.
Claim 6
Dependent Claim 29 words
The furnace wall construction of claim 1 in which said projections on said panel members are disposed along both the upper and lower marginal portions of the panel members.
Claim 7
Dependent Claim 48 words
The furnace wall construction of claim 1 which includes at least two horizontally disposed rows of said panel members, at least one panel member of a lower row contacting at least one panel member of an upper row and aiding in the support of said last-mentioned panel member.

References Cited (Backward Citations)

US1768865A Cited
US3427011A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-12-05 1976-06-05 1976-12-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-12-05 1980-06-05 1980-12-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-12-05 1984-06-05 1984-12-05 $7700.00 Window Closed / Lapsed

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