US3752091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectionalized stack
Assignee: Individual
•
Filing: 1972-05-10
•
Granted: 1973-08-14
•
Expires: 1992-05-10
Abstract
Abstract A sectionalized stack in which each vertical section has outer and inner upright walls and annular, horizontal flanges connecting the upper and lower ends of the walls to bound an airfilled, insulating chamber is provided with two accordion-like circumferential folds in the inner wall adjacent the respective flanges. The inner wall has a main portion of uniform cross section connecting the folds. The folds being somewhat resilient, the connecting portion can expand vertically and horizontally at a rate different from the rate of expansion of the outer wall when very hot gases rise in the conduit bounded by the inner wall. Distortion of the folds by the weight of the connecting portion is prevented by transferring most of the weight of the connecting portion to the outer wall by means of slidably engaged abutments on the two walls in the insulating chamber.
Inventors
- 👤 E Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:53
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
A stack for the conveyance of hot gases comprising, in combination: a. a plurality of sections having each a vertical axis, 1. each section having an outer, upright, axial wall, an inner, upright, axial wall, an upper annular flange, and a lower annular flange, said flanges connecting said walls transversely to said axis, said walls and flanges jointly bounding a chamber therebetween, and said inner wall bounding a conduit alignedly communicating with respective conduits in other sections, 2. each of said inner walls being formed with two resiliently deformable accordeon-like folds axially spaced from each other and respectively adjacent said upper and lower flanges, said folds permitting thermal expansion and contraction of said inner wall at a rate different from the rate of expansion and contraction of said outer wall, 3. a portion of said inner wall axially connecting said two spaced folds; b. supporting means in each of said plurality of sections for directly transmitting at least a major portion of the weight of said connecting portion of the inner wall to said outer wall; and c. fastening means fixedly fastening respective flanges of adjacent sections to each other.
Claim 2
Dependent Claim
190 words
A stack for the conveyance of hot gases comprising, in combination: a. a plurality of sections having each a vertical axis, 1. each section having an outer, upright, axial wall, an inner, upright, axial wall, an upper annular flange, and a lower annular flange, said flanges connecting said walls transversely to said axis, said walls and flanges jointly bounding a chamber therebetween, and said inner wall bounding a conduit alignedly communicating with respective conduits in other sections, 2. each of said inner walls being formed with two resiliently deformable accordeon-like folds axially spaced from each other and respectively adjacent said upper and lower flanges, said folds permitting thermal expansion and contraction of said inner wall at a rate different from the rate of expansion and contraction of said outer wall, 3. a portion of said inner wall axially connecting said two spaced folds; b. supporting means in each of said plurality of sections for directly transmitting at least a major portion of the weight of said connecting portion of the inner wall to said outer wall; and c. fastening means fixedly fastening respective flanges of adjacent sections to each other.
Claim 3
Dependent Claim
52 words
each of said inner walls being formed with two resiliently deformable accordeon-like folds axially spaced from each other and respectively adjacent said upper and lower flanges, said folds permitting thermal expansion and contraction of said inner wall at a rate different from the rate of expansion and contraction of said outer wall,
Claim 4
Dependent Claim
52 words
each of said inner walls being formed with two resiliently deformable accordeon-like folds axially spaced from each other and respectively adjacent said upper and lower flanges, said folds permitting thermal expansion and contraction of said inner wall at a rate different from the rate of expansion and contraction of said outer wall,
Claim 5
Dependent Claim
72 words
A stack as set forth in claim 1, wherein said supporting means include a first abutment member fixedly fastened to said connecting portion of said inner wall in said chamber, and a second abutment member fixedly fastened to said outer wall in said chamber and engaging said first abutment member for limiting downward movement of said connecting portion while permitting relative horizontal movement of said connecting portion and of said outer wall.
Claim 6
Dependent Claim
24 words
A stack as set forth in claim 2, wherein said abutment members are annular and substantially disc-shaped in respective planes transverse to said axis.
Claim 7
Dependent Claim
59 words
a portion of said inner wall axially connecting said two spaced folds; b. supporting means in each of said plurality of sections for directly transmitting at least a major portion of the weight of said connecting portion of the inner wall to said outer wall; and c. fastening means fixedly fastening respective flanges of adjacent sections to each other.
Claim 8
Dependent Claim
59 words
a portion of said inner wall axially connecting said two spaced folds; b. supporting means in each of said plurality of sections for directly transmitting at least a major portion of the weight of said connecting portion of the inner wall to said outer wall; and c. fastening means fixedly fastening respective flanges of adjacent sections to each other.
Claim 9
Dependent Claim
27 words
A stack as set forth in claim 3, wherein said connecting portion is of substantially uniform cross section from one of said folds to the other fold.
Claim 10
Dependent Claim
28 words
A stack as set forth in claim 4, wherein the axial length of said connecting portion is greater than one half the total axial height of said section.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |