US3669042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectionalized stack with circumferential and radial expansion means
Assignee: Individual
•
Filing: 1970-04-10
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Granted: 1972-06-13
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Expires: 1990-04-10
Abstract
Abstract A smokestack has axially aligned tubular sections. Each section has concentric inner and outer walls. Accordion-like circumferential flanges on the inner wall of each section permit relative axial expansion and contraction of the walls. Other accordion-like circumferential flanges between the inner and outer walls permit relative radial and circumferential expansion and contraction of the walls. Dynamic vibration absorbers are provided at the base of the smokestack. The sections are reinforced by flexible internal braces located in the air space between the inner and outer walls, and secured to the circumferential flanges.
Inventors
- 👤 Richard E Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:25
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/28
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
128 words
A smokestack for the conveyance of hot gases comprising: a. a plurality of elongated tubular sections having respective longitudinal axes and being connected in axial alignment, 1. each section including inner and outer axial walls defining a dead air space therebetween, 2. said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls, 3. each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space, 4. each of said radial flanges including a circumferential, accordion-like fold to compensate for differences in radial and circumferential expansion of said walls; and b. fastening means fastening said radial flanges of axially juxtaposed sections to each other.
Claim 2
Dependent Claim
128 words
A smokestack for the conveyance of hot gases comprising: a. a plurality of elongated tubular sections having respective longitudinal axes and being connected in axial alignment, 1. each section including inner and outer axial walls defining a dead air space therebetween, 2. said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls, 3. each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space, 4. each of said radial flanges including a circumferential, accordion-like fold to compensate for differences in radial and circumferential expansion of said walls; and b. fastening means fastening said radial flanges of axially juxtaposed sections to each other.
Claim 3
Dependent Claim
55 words
A smokestack as defined in claim 1, further comprising further flat flanges extending radially inwardly of the outer wall and outwardly of the inner wall, said further flanges being laterally juxtaposed, and slip joint means connecting said further flanges to permit relative axial, radial and circumferential expansion and contraction of the inner and outer walls.
Claim 4
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls,
Claim 5
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls,
Claim 6
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls,
Claim 7
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls,
Claim 8
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls,
Claim 9
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differences in axial thermal expansion of said walls,
Claim 10
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differEnces in axial thermal expansion of said walls,
Claim 11
Dependent Claim
19 words
said inner wall including a circumferential accordion-like fold to compensate for differEnces in axial thermal expansion of said walls,
Claim 12
Dependent Claim
44 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space; and c. a vibration absorbing pad interposed between the lowermost of said sections and said support.
Claim 13
Dependent Claim
44 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space; and c. a vibration absorbing pad interposed between the lowermost of said sections and said support.
Claim 14
Dependent Claim
42 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space; and c. resilient vibration absorbing means connecting one of said sections to said support.
Claim 15
Dependent Claim
42 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space; and c. resilient vibration absorbing means connecting one of said sections to said support.
Claim 16
Dependent Claim
28 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space,
Claim 17
Dependent Claim
28 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space,
Claim 18
Dependent Claim
28 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space,
Claim 19
Dependent Claim
28 words
each section further including a radial flange at each axial end thereof, said radial flange connecting said inner and outer walls and axially bounding said dead air space,
Claim 20
Dependent Claim
28 words
A smokestack as defined in claim 1, further comprising radially projecting, circumferentially spaced ribs on the outer wall of each section axially extending from end to end thereof.
Claim 21
Dependent Claim
26 words
A smokestack for the conveyance of hot gases comprising: a. a plurality of elongated tubular sections having respective longitudinal axes and being connected in axial alignment,
Claim 22
Dependent Claim
26 words
A smokestack for the conveyance of hot gases comprising: a. a plurality of elongated tubular sections having respective longitudinal axes and being connected in axial alignment,
Claim 23
Dependent Claim
37 words
each of said radial flanges including a circumferential, accordion-like fold to compensate for differences in radial and circumferential expansion of said walls; and b. fastening means fastening said radial flanges of axially juxtaposed sections to each other.
Claim 24
Dependent Claim
37 words
each of said radial flanges including a circumferential, accordion-like fold to compensate for differences in radial and circumferential expansion of said walls; and b. fastening means fastening said radial flanges of axially juxtaposed sections to each other.
Claim 25
Dependent Claim
44 words
an elongated brace member secured in said dead air space to said outer wall adjacent one of said radial flanges and to said inner wall adjacent the other radial flange; and b. fastening means fastening said sections to each other in said axial alignment.
Claim 26
Dependent Claim
44 words
an elongated brace member secured in said dead air space to said outer wall adjacent one of said radial flanges and to said inner wall adjacent the other radial flange; and b. fastening means fastening said sections to each other in said axial alignment.
Claim 27
Dependent Claim
34 words
A smokestack for the conveyance of hot gases comprising: a. a support; b. a plurality of elongated tubular sections having respective vertically extending longitudinal axes and being connected in axial alignment above said support,
Claim 28
Dependent Claim
34 words
A smokestack for the conveyance of hot gases comprising: a. a support; b. a plurality of elongated tubular sections having respective vertically extending longitudinal axes and being connected in axial alignment above said support,
Claim 29
Dependent Claim
36 words
A smokestack for the conveyance of hot gases comprising: a. a stationary support; b. a plurality of elongated tubular sections having respective vertically extending longitudinal axes and being connected in axial alignment horizontally adjacent said support,
Claim 30
Dependent Claim
36 words
A smokestack for the conveyance of hot gases comprising: a. a stationary support; b. a plurality of elongated tubular sections having respective vertically extending longitudinal axes and being connected in axial alignment horizontally adjacent said support,
Claim 31
Dependent Claim
31 words
A smokestack as defined in claim 6, further comprising other stationary support means underneath said aligned sections, and a vibration absorbing pad disposed between the lowermost section and said support means.
Claim 32
Dependent Claim
79 words
A smokestack as defined in claim 6, wherein said vibration absorbing means include a plurality of vibration absorbing elements angularly offset about said longitudinal axes, each element including a casing, a piston and a vibration absorbing pad in said casing, and connecting means connecting said piston and said casing to said one section and said support respectively for moving said piston against the restraint of said pad in said casing when said one section moves relative to said support.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |