Patent US3563522A successfully refreshed from Google Patents.
US3563522A
Expired / Lapsed
US
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Sealing device
Assignee: Individual
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Filing: 1968-04-29
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Granted: 1971-02-16
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Expires: 1988-04-29
Abstract
Abstract A sealing device for a bell-type furnace which includes a quantity of loose, temperature resisting material such as sand encased within flexible temperature resisting material such as asbestos cloth.
Inventors
- 👤 Calvin C Blackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:53
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/14; C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/663; C21D9/673
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
113 words
In a bell-type furnace including a base member for supporting a charge and a cover member for covering the charge, said base member having insulation on the bottom thereof, an improved gas seal comprising, said base member having an annular recess extending below the insulation, a quantity of loose temperature resisting material, temperature resisting flexible encasement means at least partially enclosing said loose material and defining therewith a continuous conformable annular sealing ring, said sealing ring being carried by one of said members, the other of said members including annular means dispOsed to sealingly engage said sealing ring within said recess when said cover is in place, whereby to provide a gas seal.
Claim 2
Dependent Claim
113 words
In a bell-type furnace including a base member for supporting a charge and a cover member for covering the charge, said base member having insulation on the bottom thereof, an improved gas seal comprising, said base member having an annular recess extending below the insulation, a quantity of loose temperature resisting material, temperature resisting flexible encasement means at least partially enclosing said loose material and defining therewith a continuous conformable annular sealing ring, said sealing ring being carried by one of said members, the other of said members including annular means dispOsed to sealingly engage said sealing ring within said recess when said cover is in place, whereby to provide a gas seal.
Claim 3
Dependent Claim
19 words
The seal of claim 1 wherein a layer of heat resistant fibrous material is provided to overlie said ring.
Claim 4
Dependent Claim
35 words
The seal of claim 1 wherein said cover member also includes a second conformable sealing ring of temperature resisting material contained within temperature resisting flexible encasement means and disposed to abut said first sealing ring.
Claim 5
Dependent Claim
13 words
The seal of claim 1 wherein said cover member carries said sealing ring.
Claim 6
Dependent Claim
25 words
The seal of claim 4 wherein said annular means to engage said ring includes upwardly projecting means carried by said base member within said recess.
Claim 7
Dependent Claim
12 words
The seal of claim 1 wherein said loose material is particulate material.
Claim 8
Dependent Claim
12 words
The seal of claim 6 wherein the particulate material is silica sand.
Claim 9
Dependent Claim
13 words
The seal of claim 1 wherein the encasement means includes heat resisting cloth.
Claim 10
Dependent Claim
84 words
In a bell-type furnace including a base member for supporting a charge and a cover member for covering the charge, and wherein said base includes insulation on the bottom thereof, an improved gas seal comprising, an annular recess formed in said base member and extending below said insulation, sealing material disposed in said recess and disposed to support the lower edge of the cover member, a quantity of ceramic wool fiber extending across said recess above said sealing material to form a heat barrier.
Claim 11
Dependent Claim
84 words
In a bell-type furnace including a base member for supporting a charge and a cover member for covering the charge, and wherein said base includes insulation on the bottom thereof, an improved gas seal comprising, an annular recess formed in said base member and extending below said insulation, sealing material disposed in said recess and disposed to support the lower edge of the cover member, a quantity of ceramic wool fiber extending across said recess above said sealing material to form a heat barrier.
Claim 12
Dependent Claim
17 words
The seal of claim 9 wherein particulate heat resisting material is disposed below said ceramic wool material.
Claim 13
Dependent Claim
21 words
The seal of claim 10 wherein said particulate material includes encasement means between said particulate material and said ceramic wool material.
Claim 14
Dependent Claim
99 words
In a bell-type furnace including a base member for supporting a charge and a cover member for covering the charge, said base member having insulation on the bottom thereof, an improved gas seal comprising, a quantity of particulate temperature resisting material, temperature resisting flexible encasement means at least partially enclosing said particulate material and defining therewith a continuous conformable annular sealing ring, said sealing ring being carried by one of said members, the other of said members including annular means disposed to sealingly engage said sealing ring when said cover is in place, whereby to provide a gas seal.
Claim 15
Dependent Claim
99 words
In a bell-type furnace including a base member for supporting a charge and a cover member for covering the charge, said base member having insulation on the bottom thereof, an improved gas seal comprising, a quantity of particulate temperature resisting material, temperature resisting flexible encasement means at least partially enclosing said particulate material and defining therewith a continuous conformable annular sealing ring, said sealing ring being carried by one of said members, the other of said members including annular means disposed to sealingly engage said sealing ring when said cover is in place, whereby to provide a gas seal.
Claim 16
Dependent Claim
23 words
The invention as defined in claim 12 wherein the particulate material constitutes a major portion of the material encased by said encasement means.
Claim 17
Dependent Claim
12 words
The seal of claim 12 wherein the particulate material is silica sand.
Claim 18
Dependent Claim
19 words
The seal of claim 12 wherein a layer of heat resistant fibrous material is provided to overlie said ring.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |