Patent US3384362A successfully refreshed from Google Patents.
Patent US4027654A successfully refreshed from Google Patents.
US4027654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper assembly for high temperature or corrosive gases
Assignee: American Air Filter Co Inc
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Filing: 1975-12-04
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Granted: 1977-06-07
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Expires: 1995-12-04
Abstract
Abstract A damper assembly for high temperature or corrosive gases including a flow through housing with a damper blade disposed therein, the damper blade including a metallic plate member attached to a transversely extending support member which extends through openings in the side walls of the housing. The plate member includes means for receiving refractory thereon wherein the refractory substantially covers the plate member and is divided into a plurality of preselected sections, each section being separated by a material having a relatively low disintegrating temperature whereby upon initial heating of the damper assembly to temperatures higher than the disintegrating temperature of the relatively low disintegrating material, the said material disintegrates thereby leaving spacing in the refractory for expansion and contraction over a wide range of temperatures.
Inventors
- 👤 David H. Kannapell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:03
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/002; C21B7/005; Y; Y10; Y10T; Y10T137/00; Y10T137/5544; Y10T137/5617
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
A damper assembly comprising: a flow through housing having a flow through inlet and a flow through outlet; a pair of metallic plate members disposed within the housing and attached on opposite sides to a transversely extending movable support member having pressure relieving means therein, the support member extending through aligned openings in the sidewalls of the housing; said plate members including means for receiving refractory thereon; a refractory substantially covering said plate members, said refractory being divided into a plurality of preselected sections; and, a material having a relatively low disintegrating temperature disposed between adjacent sections of said refractory whereby upon initial heating of the assembly said low temperature disintegrating material disintegrates thereby leaving spacing in the refractory for expansion and contraction over a wide temperature range.
Claim 2
Dependent Claim
128 words
A damper assembly comprising: a flow through housing having a flow through inlet and a flow through outlet; a pair of metallic plate members disposed within the housing and attached on opposite sides to a transversely extending movable support member having pressure relieving means therein, the support member extending through aligned openings in the sidewalls of the housing; said plate members including means for receiving refractory thereon; a refractory substantially covering said plate members, said refractory being divided into a plurality of preselected sections; and, a material having a relatively low disintegrating temperature disposed between adjacent sections of said refractory whereby upon initial heating of the assembly said low temperature disintegrating material disintegrates thereby leaving spacing in the refractory for expansion and contraction over a wide temperature range.
Claim 3
Dependent Claim
29 words
The damper assembly of claim 1 wherein the flow through inlet is a pair of opposed flow through inlets, each inlet being in communication with a dirty gas source.
Claim 4
Dependent Claim
44 words
The damper assembly of claim 1 including a high temperature fibrous material disposed between said plate members and said refractory, said movable support member being a hollow member with at least one end opening and includes at least one aperture in the wall thereof.
Claim 5
Dependent Claim
27 words
The damper assembly of claim 1 wherein said means for receiving refractory thereon includes a plurality of V-shaped outwardly extending portions fixedly attached to said plate members.
Claim 6
Dependent Claim
21 words
The damper assembly of claim 4 wherein said V-shaped members are short sections of refractory anchors attached to said plate members.
Claim 7
Dependent Claim
16 words
The damper assembly of claim 5 wherein said refractory anchors are welded to said plate members.
Claim 8
Dependent Claim
12 words
The damper assembly of claim 5 wherein said refractory anchors are metallic.
Claim 9
Dependent Claim
16 words
The damper assembly of claim 1 including a spacing between said damper blade and said housing.
Claim 10
Dependent Claim
14 words
The damper assembly of claim 1 wherein Masonite is said low temperature disintegratable material.
References Cited (Backward Citations)
US1868253A
Cited
US1962336A
Cited
US2475102A
Cited
US2659361A
Cited
US2705477A
Cited
US2720150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |