US3872780A - Triple wall chimney pipe assembly - Google Patents

Triple wall chimney pipe assembly Download PDF

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US3872780A
US3872780A US457606A US45760674A US3872780A US 3872780 A US3872780 A US 3872780A US 457606 A US457606 A US 457606A US 45760674 A US45760674 A US 45760674A US 3872780 A US3872780 A US 3872780A
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pipe section
projections
spacer rings
outer pipe
groups
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US457606A
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Theodore Zanias
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American Metal Products Co
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American Metal Products Co
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F23J13/02—Linings; Jackets; Casings
    • F23J13/025—Linings; Jackets; Casings composed of concentric elements, e.g. double walled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F23J13/04—Joints; Connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2213/00—Chimneys or flues
    • F23J2213/20—Joints; Connections
    • F23J2213/202—Joints; Connections between duct or stack sections

Definitions

  • a prefabricated pipe assembly for use in forming a chimney is made up of outer, intermediaate, and inner [52 us. c1 98/60, 126/307 R, 138/113, p p Sections which define spaced apart walls- Groups 13 114 235 133 R, 235 133 of projections are formed on the inner periphery of 51 1m. (:1 E04h 17/02 the Outer section for maintaining the interniediate [58] Field of Sea h U 93/58 60; 126/307 R 312; tion concentrically positioned therein.
  • Spacer ring 133/113 114; 235/47 133 R, 133; 110 1 4 structure is mounted within the ends of the outer sec- 3 tion to hold the intermediate section longitudinally [5 References Ci d therein'and concentrically position the inner section.
  • UNITED STATES PATENTS Cooperating structure is formed on the inner section 2 7S 2 and spacer rings to hold the inner section longitudii i et a1 g nally in place.
  • Interlocking male and female structure 22916308 10/1959 62,5?:JJJJJ'"'"TJJJJJJJJJJJJJJJJJJJJJJ: mm is formed 99911305116 ends of the Pipe assembly for 2.947303 8/1960 Epstein J'Oimng one wlth another- 2,962,053 11/1960 Epstein Vietnamese 2,976,797 3/1961 Newbill l26/307 R 13 Clams 7 Draw PATENIED HARE 5 I975 SHEET 2 UF 2 BACKGROUND OF THE INVENTION Patent Date No. Patented Inventor 9,634,720 14 April I953 R. K. Thulman 2,650,112 25 August I953 A.
  • a prefabricated pipe assembly for use in forming a chimney made up of outer, intermediate, and inner pipe sections which define spaced apart walls.
  • Groups of projections are formed on the inner periphery of the outer section for maintaining the intermediate section concentrically positioned therein.
  • Spacer ring structure is mounted within the ends of the outer section to hold the intermediate section longitudinally therein and concentrically position the inner section.
  • Cooperating structure is formed on the inner section and spacer rings to hold the inner section longitudinally in place.
  • the projections formed on the outer section hold the intermediate pipe section concentric with the inner and outerpipe sections in a loose fit which permits thermal expansion and contraction without buckling.
  • Interlocking male and female structure is provided on opposite ends of the pipe assembly so that one pipe assembly may be jointed with another in order to form a length of chimney.
  • FIG. 1 is an elevation view of a partially assembled chimney made up of pipe assemblies according to the present invention, certain of the pipe assemblies being partially cutaway to illustrate internal construction.
  • FIG. 2 is a view taken along the line 2-2 of FIG. 1.
  • FIG. 3 is a view taken along the line 3-3 of FIG. 1, looking upwards.
  • FIG. 4 is a view taken along the line 4-4 of FIG. 1.
  • FIG. 5 is a view taken along the line 5-5 of FIG. 1.
  • FIG. 6 is a view taken along the line 6-6 of FIG. 1.
  • FIG. 7 is a perspective view of the male and female end portions of the uncoupled pipe section assemblies of FIG. 1, shown partially cut away to illustrate internal construction.
  • FIG. 1 a length of chimney made up three sections of pipe assembly 10; The two uppermost assemblies are illustrated coupled together and are designated 10A and 10B, going from the top downwardly.
  • the lowermost assembly 10C is only partially shown and is illustrated positioned for coupling to the lower end of the assembly 108. 1
  • Each of the pipe assemblies 10 are identically constructed and include an outer pipe section 11, an intermediate pipe section 12 and 'an inner pipe section 13.
  • the pipe sections 11-13 are illustrated as being cylindrical and may, for example, be made from rectangular plates of stainless steel by crimping their opposite edges together to form longitudinal seams 9, as shown in FIG. 3.
  • the pipe sections 11-13 are appropriately dimensioned for concentric positioning within each other to define spaced apart walls with the intermediate pipe section 12 dimensioned for positioning substantially midway between the inner and outer pipe sections 13 and 11.
  • Each of the pipe assemblies 10 has a male end portion 14 and a female end portion IS.
  • the end portions 14 and 15 are illustrated as being formed as an integral part of the outer pipe sections 11.
  • the female end portion 15 is shown formed by an annular collar of substantially the same diameter as the outer wall portion defined by pipe section II and has inwardly extending locking lances or flanges 16 formed thereon.
  • the flanges-I6 are preferably punched out from the collar portion 15.
  • the locking flanges 16 define locking edges 17 which engage outwardly extending arcuate shaped beads or projections 18 formed around the outer periphery of the male end portion 14.
  • the projections 18 are illustrated formed in the male end portion 14 by being impressed therein.
  • the male and female end portions 14 and 15 interfit and interlock, as illustrated in FIGS. 4 and 6, to join one of the pipe assemblies 10 with another.
  • a group of inwardly extending projections 20 are formed on the inner peripheral surface of the male end portion 14.
  • the projections 20 are preferably made by forming indentations in the outer periphery of the pipe section 11 at intervals equally spaced apart circumferentially.
  • the projections 20 illustrated define a common plane substantially perpendicular to the longitudinal axis of the pipe section 11.
  • Each of the projections 20 is similarly dimensioned and extends inwardly to form an arc portion 21 which is radially positioned approximately at the location whereat it is desired to hold and maintain the intermediate wall portion 12.
  • An appropriate number of projections 20 is formed on the pipe section 11 to concentrically support the intermediate pipe section 12 therein.
  • each of the projections 20 Rigidly secured to each of the projections 20 is an annular spacer ring 22.
  • the spacer ring 22 is connected to the projections 20 by means of extensions 23 which are illustrated formed integral with the ring 22.
  • the extensions 23 have flange portions 24 formed on their outer ends which are secured to the projections 20, such as by being spot welded thereto.
  • the spacer ring 22 and extensions 23 preferably lie in a common plane.
  • the inner diameter of the spacer ring 22 is greater than the outer diameter of pipe section 13 but a selected distance smaller than the inner diameter of the pipe section 12. Thereby,the spacer ring 22 does not completely close the end of the intermediate pipe section 12 to allow the 'flow of gas therethrough.
  • the spacer ring 22 is illustrated positioned in a plane substantially perpendicular to the longitudinal axis of the pipe section 11 with the extensions 23 joining the projections 20 at approximately the points whereat the slope of the projections 20 change from the vertical to an outward slope.
  • the upper end of the pipe section 12 is positioned just below the planar portion of the ring 22 in a loose fitting relationship within the projections 20. Thereby, space is provided in which the pipe section 12 may thermally expand or contract without buckling.
  • the inner periphery of the spacer ring 22 is formed to define a downwardly extending annular flange 30.
  • the annular flange 30 is constructed to have a diameter slightly larger than the outer diameter of the inner pipe section 13 and fits over the outwardly expanding-flared upper end 31 of the wall portion 13. Space is thereby provided for the lower end 32 of the inner pipe section 13 in the upper pipe assembly A to slidably mate within the enlarged end portion 31 of the inner section 13 of pipe assembly 108 in sliding contact with the annular flange 30.
  • the projections and the annular spacer ring 22 cooperate to hold the upper ends of the pipe sections 11, 12, and 13 spaced apart in a concentric relationship with respect to each other.
  • the pipe assemblies 10 illustrated are dimensioned so that the intermediate sections 12 lie substantially midway between the outer and inner pipe sections 11 and 13.
  • FIGS. 3 and 7. A view of the lower female end of the pipe assembly 108 is shown in FIGS. 3 and 7. As there shown, a planar spacer ring 40 is mounted within the female end portion 15.
  • the ring 40 itself corresponds in size to the ring 22 and has outwardly extending planar extensions 41 thereon.
  • the extensions 41 correspond in number to the extensions 23 on the ring 22, are similarly shaped, are dimensioned to reach the inner surface of outer pipe section 11, are equally spaced apart circumferentially, and are positioned in radial alignment with the projections 20 formed on the upper end of the pipe assembly.
  • Formed on the outer end of the extensions 41 are flange portions 42 which extend downwardly perpendicularly to the plane of the ring 40.
  • the flange portions 42 are rigidly secured preferably by spot welding to the inner periphery of the outer pipe section 11.
  • the outer wall portion of the outer pipe section 11 is indented above the plane of the ring 40 at points preferably in circumferential alignment with the extensions 41 to form projections 50 having inner arc portions 51 positioned in substantially the same radial position as the vertical extending portions 21 of the projections 20.
  • the arc portions 51 function to loosely hold the lower end of the intermediate pipe section 12 in a concentric relationship between the pipe sections 11 and 13.
  • the lower end of the pipe section 12 rests upon the supporting structure formed by the extensions 41 on the spacer ring 40.
  • annular projection 60 is formed around the outer periphery of the inner pipe section 13, preferably by 7 being indented therein, adjacent its lower end but a spaced distan ce therefrom.
  • the annular projection lies in a planesubstantially perpendicular to the longitudinal axis of the pipe section 13 and is longitudinally positioned from the lower end of the inner pipe section 11 to rest against the inside surface of the spacer ring 40 when the flared end 31 of the inner pipe section is fitted around the inwardly extendingannular flange 30 of the upper spacer ring 22.
  • the lower end 32 of the inner pipe section 11 extends downwardly from the annular projection 60 formed therearound and is dimensioned for insertion into the male end 14 of an adjacent pipe assembly 10, as shownin FIG. 4.
  • a pipe assembly for forming a chimney comprismg:
  • substantially cylindrical outer, intermediate and inner pipe sections, and pipe sections being positioned concentrically one within the other and dimensioned to define spaced apart walls;
  • each of said spacer rings having an outer diameter a predetermined amount smaller than the inner diameter of said intermediate pipe section and an inner diameter larger than the outer diameter of said inner pipe section;
  • cooperating structure means formed on said spacer rings and inner pipe section for supporting said inner pipe section within said intermediate pipe section, said structure means being operable to hold, said inner pipe section in a substantially fixed longitudinal position concentric with said outer pipe section.
  • each of said groups of projections are formed by making circumferentially spaced apart indentations in the outer peripheral surface of said outer pipe section.
  • each of said groups of projections is comprised of more than two projections, the projections in each of said groups being spaced apart circumferentially substantially equally.
  • said support structure comprises extensions formed as an integral part of said spacer rings, said extensions corresponding in number to said projections and each being rigidly secured to said outer pipe section in radial alignment with one of said projections.
  • each of said spacer rings and said extensions formed integral therewith are planar and define a common plane, said extensions being secured to said outer pipe section to extend substantially perpendicular to the axis thereof whereby said spacer rings are positioned in a plane substantially perpendicular to the axis of said outer pipe section.
  • annular flange portion formed on said first spacer ring, said annular flange portion being concentrically positioned with respect to said outer pipe section;
  • annular projection formed around the outer periphery of said inner pipe section adjacent its other end but a spaced distance therefrom, said annular projection being longitudinally positioned to rest against the inside surface of said second spacer ring whenever the flared end of said inner pipe section is fitted around the inwardly extending annular flange portion of said first spacer ring, the end portion of said inner pipe section extending outwardly from said annular projection formed therearound being for insertion into the annular flange portion of the first spacer ring of a second of said pipe assemblies at the time of assembling two of said pipe assemblies together.
  • said support structure comprises extensions formed as an integral part of said spacer rings, said extensions corresponding in number to said projections and each being rigidly secured to said outer pipe section in radial alignment with one of said projections;
  • each of said spacer rings and said extensions formed integral therewith are planar and define a common plane, said extensions being secured to said outer pipe section to extend substantially perpendicular to the axis thereof whereby said spacer rings are positioned in a plane substantially perpendicular to the axis of said outer pipe section;
  • each of said groups of projections are formed by making circumferentially spaced apart indentations in the outer peripheral surface of said outer pipe section, each of said groups of projections being comprised of more than two projections.
  • projections in each of said groups being spaced apart circumferentially substantially equally, said projections in each of said groups defining a common plane substantially perpendicular to the longitudinal axis of said outer pipe section.
  • first and second longitudinally spaced apart groups of projection means formed on the inner periphery of said outer pipe section for maintaining said intermediate pipe section concentrically positioned therein;
  • a pair of spacer rings each having an outer diameter a predetermined amount smaller than the inner diameter of said intermediate pipe section and an inner diameter larger than the outer diameter of said inner pipe section;
  • cooperating structure means formed on said spacer rings and inner pipe section for supportin said inner pipe section within said intermediate pipe section.
  • said structure means being operable to hold said and female interlocking structure means are formed on opposite ends of said pipe assembly for joining one of said pipe assemblies with another.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

A prefabricated pipe assembly for use in forming a chimney is made up of outer, intermediate, and inner pipe sections which define spaced apart walls. Groups of projections are formed on the inner periphery of the outer section for maintaining the intermediate section concentrically positioned therein. Spacer ring structure is mounted within the ends of the outer section to hold the intermediate section longitudinally therein and concentrically position the inner section. Cooperating structure is formed on the inner section and spacer rings to hold the inner section longitudinally in place. Interlocking male and female structure is formed on opposite ends of the pipe assembly for joining one with another.

Description

I United States Patent 1191 1111 3,872,780 Zanias Mar. 25, 1975 TRIPLE WALL CHIMNEY PIPE ASSEMBLY [75] Inventor: Theodore Zanias, Anaheim, Calif. l Examu 1er wflham O D ea Assistant Examiner-Peter D. Ferguson [73] Assignee: American Metal Products Attorney, Agent, or Firm-Herzig & Walsh Corporation, Los Angeles, Calif.
[22] Filed: Apr. 3, 1974 57 ABSTRACT [2]] Appl' 457,606 A prefabricated pipe assembly for use in forming a chimney is made up of outer, intermediaate, and inner [52 us. c1 98/60, 126/307 R, 138/113, p p Sections which define spaced apart walls- Groups 13 114 235 133 R, 235 133 of projections are formed on the inner periphery of 51 1m. (:1 E04h 17/02 the Outer section for maintaining the interniediate [58] Field of Sea h U 93/58 60; 126/307 R 312; tion concentrically positioned therein. Spacer ring 133/113 114; 235/47 133 R, 133; 110 1 4 structure is mounted within the ends of the outer sec- 3 tion to hold the intermediate section longitudinally [5 References Ci d therein'and concentrically position the inner section. UNITED STATES PATENTS Cooperating structure is formed on the inner section 2 7S 2 and spacer rings to hold the inner section longitudii i et a1 g nally in place. Interlocking male and female structure 22916308 10/1959 62,5?:JJJJJ'"'"TJJJJJJJJJJJJJ: mm is formed 99911305116 ends of the Pipe assembly for 2.947303 8/1960 Epstein J'Oimng one wlth another- 2,962,053 11/1960 Epstein..... 2,976,797 3/1961 Newbill l26/307 R 13 Clams 7 Draw PATENIED HARE 5 I975 SHEET 2 UF 2 BACKGROUND OF THE INVENTION Patent Date No. Patented Inventor 9,634,720 14 April I953 R. K. Thulman 2,650,112 25 August I953 A. Kinkead 2.650.l I4 25 August I953 -S. Epstein 2,910,308 27 October 1959 J. H. Carr 2.936,l84 l May 1960 S. Epstein 22,947,303 2 August I960 S. Epstein *2.962,053 29 November I960 S. Epstein SUMMARY OF THE INVENTION It is an object of the present invention to provide'a chimney pipe assembly of the triple walltype which is an improvement over the prior art and is characterized by having one or more of the following advantages:
a. Capable of providing a safe and durable passage for hot flue gases which does not buckle and effectively distributes heat, thereby to avoid the formation of dangeroushot spots on its wall portions;
b. Capable ofbeing prefabricated by low cost mass production methods and having rapidly reproducible parts which are easily and readily assembled so as to minimize labor costs;
c. Capable'of being constructed with a relatively small cross-sectional size while still meeting safety requirements, thereby to permit reductions in installation space required, shipping weight, and storage space;
d. Having its inner,'intermediate and outer walls held in an accurately spaced apart relationship so as to insure required clearances to meet safety and efficiency standards;
e. Constructed to permit limited movement between assembled parts to prevent buckling caused by thermal expansion and contraction; and
f. Suitable for use with a variety of fuels including oil, wood, coal, and others, and in various building structures including domestic residences.
In accomplishing these and other objects, there is provided in accordance with the present invention a prefabricated pipe assembly for use in forming a chimney made up of outer, intermediate, and inner pipe sections which define spaced apart walls. Groups of projections are formed on the inner periphery of the outer section for maintaining the intermediate section concentrically positioned therein. Spacer ring structure is mounted within the ends of the outer section to hold the intermediate section longitudinally therein and concentrically position the inner section. Cooperating structure is formed on the inner section and spacer rings to hold the inner section longitudinally in place. The projections formed on the outer section hold the intermediate pipe section concentric with the inner and outerpipe sections in a loose fit which permits thermal expansion and contraction without buckling. Interlocking male and female structure is provided on opposite ends of the pipe assembly so that one pipe assembly may be jointed with another in order to form a length of chimney.
Additional objects of the present invention reside in the specific construction of the chimney pipe assembly shown in several drawings hereinafter described in connection therewith.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevation view of a partially assembled chimney made up of pipe assemblies according to the present invention, certain of the pipe assemblies being partially cutaway to illustrate internal construction.
FIG. 2 is a view taken along the line 2-2 of FIG. 1.
FIG. 3 is a view taken along the line 3-3 of FIG. 1, looking upwards.
FIG. 4 is a view taken along the line 4-4 of FIG. 1.
FIG. 5 is a view taken along the line 5-5 of FIG. 1.
FIG. 6 is a view taken along the line 6-6 of FIG. 1.
FIG. 7 is a perspective view of the male and female end portions of the uncoupled pipe section assemblies of FIG. 1, shown partially cut away to illustrate internal construction.
DETAILEDDESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings in more detail. there is shown in FIG. 1 a length of chimney made up three sections of pipe assembly 10; The two uppermost assemblies are illustrated coupled together and are designated 10A and 10B, going from the top downwardly. The lowermost assembly 10C is only partially shown and is illustrated positioned for coupling to the lower end of the assembly 108. 1
Each of the pipe assemblies 10 are identically constructed and include an outer pipe section 11, an intermediate pipe section 12 and 'an inner pipe section 13. The pipe sections 11-13 are illustrated as being cylindrical and may, for example, be made from rectangular plates of stainless steel by crimping their opposite edges together to form longitudinal seams 9, as shown in FIG. 3. The pipe sections 11-13 are appropriately dimensioned for concentric positioning within each other to define spaced apart walls with the intermediate pipe section 12 dimensioned for positioning substantially midway between the inner and outer pipe sections 13 and 11.
Each of the pipe assemblies 10 has a male end portion 14 and a female end portion IS. The end portions 14 and 15 are illustrated as being formed as an integral part of the outer pipe sections 11. The female end portion 15 is shown formed by an annular collar of substantially the same diameter as the outer wall portion defined by pipe section II and has inwardly extending locking lances or flanges 16 formed thereon. The flanges-I6 are preferably punched out from the collar portion 15. The locking flanges 16 define locking edges 17 which engage outwardly extending arcuate shaped beads or projections 18 formed around the outer periphery of the male end portion 14. The projections 18 are illustrated formed in the male end portion 14 by being impressed therein. The male and female end portions 14 and 15 interfit and interlock, as illustrated in FIGS. 4 and 6, to join one of the pipe assemblies 10 with another.
As shown in FIGS. 2, 5, and 7, a group of inwardly extending projections 20 are formed on the inner peripheral surface of the male end portion 14. The projections 20 are preferably made by forming indentations in the outer periphery of the pipe section 11 at intervals equally spaced apart circumferentially. The projections 20 illustrated define a common plane substantially perpendicular to the longitudinal axis of the pipe section 11. Each of the projections 20 is similarly dimensioned and extends inwardly to form an arc portion 21 which is radially positioned approximately at the location whereat it is desired to hold and maintain the intermediate wall portion 12. An appropriate number of projections 20 is formed on the pipe section 11 to concentrically support the intermediate pipe section 12 therein.
Rigidly secured to each of the projections 20 is an annular spacer ring 22. The spacer ring 22 is connected to the projections 20 by means of extensions 23 which are illustrated formed integral with the ring 22. The extensions 23 have flange portions 24 formed on their outer ends which are secured to the projections 20, such as by being spot welded thereto. The spacer ring 22 and extensions 23 preferably lie in a common plane. The inner diameter of the spacer ring 22 is greater than the outer diameter of pipe section 13 but a selected distance smaller than the inner diameter of the pipe section 12. Thereby,the spacer ring 22 does not completely close the end of the intermediate pipe section 12 to allow the 'flow of gas therethrough.
Referring to FIG. 5, the spacer ring 22 is illustrated positioned in a plane substantially perpendicular to the longitudinal axis of the pipe section 11 with the extensions 23 joining the projections 20 at approximately the points whereat the slope of the projections 20 change from the vertical to an outward slope. The upper end of the pipe section 12 is positioned just below the planar portion of the ring 22 in a loose fitting relationship within the projections 20. Thereby, space is provided in which the pipe section 12 may thermally expand or contract without buckling.
The inner periphery of the spacer ring 22 is formed to define a downwardly extending annular flange 30. The annular flange 30 is constructed to have a diameter slightly larger than the outer diameter of the inner pipe section 13 and fits over the outwardly expanding-flared upper end 31 of the wall portion 13. Space is thereby provided for the lower end 32 of the inner pipe section 13 in the upper pipe assembly A to slidably mate within the enlarged end portion 31 of the inner section 13 of pipe assembly 108 in sliding contact with the annular flange 30. Thereby, the projections and the annular spacer ring 22 cooperate to hold the upper ends of the pipe sections 11, 12, and 13 spaced apart in a concentric relationship with respect to each other. As above noted, the pipe assemblies 10 illustrated are dimensioned so that the intermediate sections 12 lie substantially midway between the outer and inner pipe sections 11 and 13.
A view of the lower female end of the pipe assembly 108 is shown in FIGS. 3 and 7. As there shown, a planar spacer ring 40 is mounted within the female end portion 15. The ring 40 itself corresponds in size to the ring 22 and has outwardly extending planar extensions 41 thereon. The extensions 41 correspond in number to the extensions 23 on the ring 22, are similarly shaped, are dimensioned to reach the inner surface of outer pipe section 11, are equally spaced apart circumferentially, and are positioned in radial alignment with the projections 20 formed on the upper end of the pipe assembly. Formed on the outer end of the extensions 41 are flange portions 42 which extend downwardly perpendicularly to the plane of the ring 40. The flange portions 42 are rigidly secured preferably by spot welding to the inner periphery of the outer pipe section 11.
As shown in FIG. 5, the outer wall portion of the outer pipe section 11 is indented above the plane of the ring 40 at points preferably in circumferential alignment with the extensions 41 to form projections 50 having inner arc portions 51 positioned in substantially the same radial position as the vertical extending portions 21 of the projections 20. Thereby, the arc portions 51 function to loosely hold the lower end of the intermediate pipe section 12 in a concentric relationship between the pipe sections 11 and 13. The lower end of the pipe section 12 rests upon the supporting structure formed by the extensions 41 on the spacer ring 40.
An annular projection 60 is formed around the outer periphery of the inner pipe section 13, preferably by 7 being indented therein, adjacent its lower end but a spaced distan ce therefrom. The annular projection lies in a planesubstantially perpendicular to the longitudinal axis of the pipe section 13 and is longitudinally positioned from the lower end of the inner pipe section 11 to rest against the inside surface of the spacer ring 40 when the flared end 31 of the inner pipe section is fitted around the inwardly extendingannular flange 30 of the upper spacer ring 22. The lower end 32 of the inner pipe section 11 extends downwardly from the annular projection 60 formed therearound and is dimensioned for insertion into the male end 14 of an adjacent pipe assembly 10, as shownin FIG. 4.
Although I have herein shown and described the invention in what I have conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of my invention.
What is claimed is:
1. A pipe assembly for forming a chimney, comprismg:
substantially cylindrical outer, intermediate and inner pipe sections, and pipe sections being positioned concentrically one within the other and dimensioned to define spaced apart walls;
a group of projections formed on the inner peripheral surface of said outer pipe section adjacent each end thereof for maintaining said intermediate pipe section concentrically positioned within said outer pipe section, the length of said intermediate pipe section being less than the length of said outer pipe section but at least as long as the longitudinal distance between said groups of projections;
first and second spacer rings, each of said spacer rings having an outer diameter a predetermined amount smaller than the inner diameter of said intermediate pipe section and an inner diameter larger than the outer diameter of said inner pipe section;
support structure secured between said outer pipe section and said spacer rings mounting said first and second spacer rings concentrically within said outer pipe section at opposite ends thereof, said support structure positioned to hold the ends of said intermediate pipe section longitudinally within the ends of said outer pipe section in a longitudinal position in which portions of the outer periphery surface of said intermediate pipe section are positioned within each of said groups of projections and hence are held concentrically positioned thereby; and
cooperating structure means formed on said spacer rings and inner pipe section for supporting said inner pipe section within said intermediate pipe section, said structure means being operable to hold, said inner pipe section in a substantially fixed longitudinal position concentric with said outer pipe section.
2. The inventiondefined in claim 1 wherein each of said groups of projections are formed by making circumferentially spaced apart indentations in the outer peripheral surface of said outer pipe section.
3. The invention defined in claim 1 wherein each of said groups of projections is comprised of more than two projections, the projections in each of said groups being spaced apart circumferentially substantially equally.
4. The invention defined in claim 3 wherein said projections in each of said groups define a common plane substantially perpendicular to the longitudinal axis of said outer pipe section.
5. The invention defined in claim 1 wherein said support structure comprises extensions formed as an integral part of said spacer rings, said extensions corresponding in number to said projections and each being rigidly secured to said outer pipe section in radial alignment with one of said projections.
6. The invention defined in claim 5 wherein each of said spacer rings and said extensions formed integral therewith are planar and define a common plane, said extensions being secured to said outer pipe section to extend substantially perpendicular to the axis thereof whereby said spacer rings are positioned in a plane substantially perpendicular to the axis of said outer pipe section.
7. The invention defined in claim 1, wherein said structure means for supporting said inner pipe section within said intermediate pipe section comprises:
an inwardly extending annular flange portion formed on said first spacer ring, said annular flange portion being concentrically positioned with respect to said outer pipe section;
an outward annular flare formed on the end of said inner pipe section adjacent said first spacer ring, said outward flare being dimensioned to mate with said annular flange portion by fitting thereover; and
an annular projection formed around the outer periphery of said inner pipe section adjacent its other end but a spaced distance therefrom, said annular projection being longitudinally positioned to rest against the inside surface of said second spacer ring whenever the flared end of said inner pipe section is fitted around the inwardly extending annular flange portion of said first spacer ring, the end portion of said inner pipe section extending outwardly from said annular projection formed therearound being for insertion into the annular flange portion of the first spacer ring of a second of said pipe assemblies at the time of assembling two of said pipe assemblies together.
8. The invention defined in claim 7 wherein said outer pipe section has formed on its opposite ends interlocking male and female structure means for joining one of said pipe assemblies with another.
9. The invention defined in claim 8, wherein:
said support structure comprises extensions formed as an integral part of said spacer rings, said extensions corresponding in number to said projections and each being rigidly secured to said outer pipe section in radial alignment with one of said projections;
each of said spacer rings and said extensions formed integral therewith are planar and define a common plane, said extensions being secured to said outer pipe section to extend substantially perpendicular to the axis thereof whereby said spacer rings are positioned in a plane substantially perpendicular to the axis of said outer pipe section; and
each of said groups of projections are formed by making circumferentially spaced apart indentations in the outer peripheral surface of said outer pipe section, each of said groups of projections being comprised of more than two projections. the
projections in each of said groups being spaced apart circumferentially substantially equally, said projections in each of said groups defining a common plane substantially perpendicular to the longitudinal axis of said outer pipe section.
10. The invention defined in claim 1 wherein said outer pipe section has supporting on its opposite ends interlocking male and female structure means for joining one of said pipe assemblies with another.
11. The invention defined in claim 1 wherein said pipe sections, said projections, said spacer rings, said support structure means and said cooperating structure means are dimensioned with respect to each other to accommodate a limited amount of relative movement due to settling, thermal expansion and contraction, or the like, without damage.
12. In a prefabricated pipe assembly for use in forming a chimney having outer, intermediate, and inner pipe sections defining spaced apart walls, the improvement in combination therewith of:
first and second longitudinally spaced apart groups of projection means formed on the inner periphery of said outer pipe section for maintaining said intermediate pipe section concentrically positioned therein;
a pair of spacer rings each having an outer diameter a predetermined amount smaller than the inner diameter of said intermediate pipe section and an inner diameter larger than the outer diameter of said inner pipe section;
support structure secured between said outer pipe section and said spacer rings mounting said first and second spacer rings concentrically within said outer pipe section at opposite ends thereof, said support structure positioned to hold the ends of said intermediate pipe section longitudinally within the ends of said outer pipe section in a longitudinal position in which portions of the outer peripheral surface of said intermediate pipe section are positioned within each of said groups of projection means and hence are held concentrically positioned thereby; and
cooperating structure means formed on said spacer rings and inner pipe section for supportin said inner pipe section within said intermediate pipe section. said structure means being operable to hold said and female interlocking structure means are formed on opposite ends of said pipe assembly for joining one of said pipe assemblies with another.

Claims (13)

1. A pipe assembly for forming a chimney, comprising: substantially cylindrical outer, intermediate and inner pipe sections, and pipe sections being positioned concentrically one within the other and dimensioned to define spaced apart walls; a group of projections formed on the inner peripheral surface of said outer pipe section adjacent each end thereof for maintaining said intermediate pipe section concentrically positioned within said outer pipe section, the length of said intermediate pipe section being less than the length of said outer pipe section but at least as long as the longitudinal distance between said groups of projections; first and second spacer rings, each of said spacer rings having an outer diameter a predetermined amount smaller than the inner diameter of said intermediate pipe section and an inner diameter larger than the outer diameter of said inner pipe section; support structure secured between said outer pipe section and said spacer rings mounting said first and second spacer rings concentrically within said outer pipe section at opposite ends thereof, said support structure positioned to hold the ends of said intermediate pipe section longitudinally within the ends of said outer pipe section in a longitudinal position in which portions of the outer periphery surface of said intermediate pipe section are positioned within each of said groups of projections and hence are held concentrically positioned thereby; and cooperating structure means formed on said spacer rings and inner pipe section for supporting said inner pipe section within said intermediate pipe section, said structure means being operable to hold said inner pipe section in a substantially fixed longitudinal position concentric with said outer pipe section.
2. The invention defined in claim 1 wherein each of said groups of projections are formed by making circumferentially spaced apart indentations in the outer peripheral surface of said outer pipe section.
3. The invention defined in claim 1 wherein each of said groups of projections is comprised of more than two projections, the projections in each of said groups being spaced apart circumferentially substantially equally.
4. The invention defined in claim 3 wherein said projections in each of said groups define a common plane substantially perpendicular to the longitudinal axis of said outer pipe section.
5. The invention defined in claim 1 wherein said support structure comprises extensions formed as an integral part of said spacer rings, said extensions corresponding in number to said projections and each being rigidly secured to said outer pipe section in radial alignment with one of said projections.
6. The invention defined in claim 5 wherein each of said spacer rings and said extensions formed integral therewith are planar and define a common plane, said extensions being secured to said outer pipe section to extend substantially perpendicular to the axis thereof whereby said spacer rings are positioned in a plane substantially perpendicular to the axis of said outer pipe section.
7. The invention defined in claim 1, wherein said structure means for supporting said inner pipe section within said intermediate pipe section comprises: an inwardly extending annular flange portion formed on said first spacer ring, said annular flange portion being concentrically positioned with respect to said outer pipe section; an outward annular flare formed on the end of said inner pipe section adjacent said first spacer ring, said outward flare being dimensioned to mate with said annular flange portion by fitting thereover; and an annular projection formed around the outer periphery of said inner pipe section adjacent its other end but a spaced distance therefrom, said annular projection being longitudinally positioned to rest against the inside surface of said second spacer ring whenever the flared end of said inner pipe section is fitted around the inwardly extending annular flange portion of said first spacer ring, the end portion of said inner pipe section extending outwardly from said annular projection formed therearound being for insertion into the annular flange portion of the first spacer ring of a second of said pipe assemblies at the time of assembling two of said pipe assemblies together.
8. The invention defined in claim 7 wherein said outer pipe section has formed on its opposite ends interlocking male and female structure means for joining one of said pipe assemblies with another.
9. The invention defined in claim 8, wherein: said support structure comprises extensions formed as an integral part of said spacer rings, said extensions corresponding in number to said projections and each being rigidly secured to said outer pipe section in radial alignment with one of said projections; each of said spacer rings and said extensions formed integral therewith are planar and define a common plane, said extensions being secured to said outer pipe section to extend substantially perpendicular to the axis thereof whereby said spacer rings are positioned in a plane substantially perpendicular to the axis of said outer pipe section; and each of said groups of projections are formed by making circumferentially spaced apart indentations in the outer peripheral surface of said outer pipe section, each of said groups of projections being comprised of more than two projections, the projections in each of said groups being spaced apart circumferentially substantially equally, said projections in each of said groups defining a common plane substantially perpendicular to the longitudinal axis of said outer pipe section.
10. The invention defined in claim 1 wherein said outer pipe section has supporting on its opposite ends interlocking male and female structure means for joining one of said pipe assemblies with another.
11. The invention defined in claim 1 wherein said pipe sections, said projections, said spacer rings, said support structure means and said cooperating structure means are dimensioned with respect to each other to accommodate a limited amount of relative movement due to settling, thermal expansion and contraction, or the like, without damage.
12. In a prefabricated pipe assembly for use in forming a chimney having outer, intermediate, and inner pipe sections defining spaced apart walls, the improvement in combination therewith of: first and second longitudinally spaced apart groups of projection means formed on the inner periphery of said outer pipe section for maintaining said intermediate pipe section concentrically positioned therein; a pair of spAcer rings each having an outer diameter a predetermined amount smaller than the inner diameter of said intermediate pipe section and an inner diameter larger than the outer diameter of said inner pipe section; support structure secured between said outer pipe section and said spacer rings mounting said first and second spacer rings concentrically within said outer pipe section at opposite ends thereof, said support structure positioned to hold the ends of said intermediate pipe section longitudinally within the ends of said outer pipe section in a longitudinal position in which portions of the outer peripheral surface of said intermediate pipe section are positioned within each of said groups of projection means and hence are held concentrically positioned thereby; and cooperating structure means formed on said spacer rings and inner pipe section for supportin said inner pipe section within said intermediate pipe section, said structure means being operable to hold said inner pipe section in a substantially fixed longitudinal position concentric with said outer pipe section.
13. The invention defined in claim 12 wherein male and female interlocking structure means are formed on opposite ends of said pipe assembly for joining one of said pipe assemblies with another.
US457606A 1974-04-03 1974-04-03 Triple wall chimney pipe assembly Expired - Lifetime US3872780A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102632A (en) * 1976-11-22 1978-07-25 Phillip Hastings Modular heat recuperator
US4294474A (en) * 1978-09-25 1981-10-13 Harm Josephus J D Prefabricated chimney-shaft
US4306491A (en) * 1979-11-26 1981-12-22 Reardon Jr Charles A Flue system for wood burning stoves
US4381717A (en) * 1980-06-05 1983-05-03 Krautz Alfons O Sectional smokestack
US4466340A (en) * 1982-11-18 1984-08-21 American Standard Inc. Chimney assembly
US4502370A (en) * 1983-04-15 1985-03-05 Interpace Corporation Insulated chimney assembly
US4666189A (en) * 1983-05-05 1987-05-19 Masco Corporation Prefabricated multi-wall chimney
US4724750A (en) * 1986-12-04 1988-02-16 Van-Packer Company Double-walled chimney
US4781402A (en) * 1986-12-22 1988-11-01 Metal-Fab, Inc. Metal chimney assembly
US5125870A (en) * 1989-12-18 1992-06-30 G+H Montage Gmbh Flue insulation assembly
US5803127A (en) * 1985-12-16 1998-09-08 R & R Precision Corp. Coaxial piping systems
US6062608A (en) * 1998-07-29 2000-05-16 Marco Manufacturing, Inc. Coaxial flue-system for direct-vent fireplaces
US6076862A (en) * 1998-08-24 2000-06-20 Selkirk, Inc. Concentric snap-together direct vent structure and associated fabrication methods
US6113155A (en) * 1996-04-12 2000-09-05 Constructions Metalliques Mecaniques Beirens C.M.M. Beirens, Sa Modular nesting metal conduit, in particular for discharging fumes
US6527013B2 (en) * 2001-01-27 2003-03-04 Horizon Resources Corporation Insulated jackets for hot and cold piping systems and for hot and cold air ducting systems and methods of use
US6634352B2 (en) * 2001-01-17 2003-10-21 American Metal Products Company Direct venting vent pipe
US20050029805A1 (en) * 2003-06-18 2005-02-10 Benoit Gagne End-wise connection of second chimney components and method therefor
US20060130411A1 (en) * 2004-12-21 2006-06-22 Edgar Glen A Rubber boot-based roof flashing apparatus
US20070256682A1 (en) * 2006-05-02 2007-11-08 Jacklich John R Gasket-less vent pipe coupling
US20070257487A1 (en) * 2006-05-02 2007-11-08 Jacklich John R Exhaust system interlocking mechanism
US20080169037A1 (en) * 2007-01-17 2008-07-17 Cryotech International, Inc. Cryogenic bayonet connection
US20090191802A1 (en) * 2008-01-25 2009-07-30 Brad Zogg Chimney Duct
US20160069729A1 (en) * 2014-09-10 2016-03-10 Honeywell International Inc. Mechanical system for centering and holding a coax conductor in the center of an outer conductor
US9767931B2 (en) * 2014-02-24 2017-09-19 Ge-Hitachi Nuclear Energy Americas Llc Chimney structure with internal partitions having a common center, a reactor including the chimney structure, and a method of manufacturing the same
US10690343B2 (en) 2011-08-01 2020-06-23 Top Hat Chimney Systems, Inc. Universal chimney pipe cover
US10731781B2 (en) 2008-01-25 2020-08-04 The Schebler Co. Joint seal system and method
US20200370749A1 (en) * 2019-05-24 2020-11-26 Air Distribution Technologies Ip, Llc Cross compatible adapter for chimney sections with different outer diameters
EP3943814A1 (en) * 2020-07-20 2022-01-26 Poujoulat Section of smoke duct of the type with two concentric tubes and manufacturing method thereof
US11255541B2 (en) 2015-11-22 2022-02-22 The Schebler Co. Joint seal system and method

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US2275402A (en) * 1936-05-22 1942-03-03 Air Reduction Flame hardening of shafts
US2512116A (en) * 1947-07-01 1950-06-20 William H Siebels Composite pipe structure
US2910308A (en) * 1956-04-10 1959-10-27 Dura Vent Corp Snap-in lug-in-groove type resilient conduit joint
US2947303A (en) * 1958-03-10 1960-08-02 Epstein Saul Construction for intermediate wall vent pipe
US2962053A (en) * 1958-03-10 1960-11-29 Epstein Saul Spacer for triple wall vent pipe
US2976797A (en) * 1958-09-22 1961-03-28 William S Newbill Chimney construction

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102632A (en) * 1976-11-22 1978-07-25 Phillip Hastings Modular heat recuperator
US4294474A (en) * 1978-09-25 1981-10-13 Harm Josephus J D Prefabricated chimney-shaft
US4306491A (en) * 1979-11-26 1981-12-22 Reardon Jr Charles A Flue system for wood burning stoves
US4381717A (en) * 1980-06-05 1983-05-03 Krautz Alfons O Sectional smokestack
US4466340A (en) * 1982-11-18 1984-08-21 American Standard Inc. Chimney assembly
US4502370A (en) * 1983-04-15 1985-03-05 Interpace Corporation Insulated chimney assembly
US4666189A (en) * 1983-05-05 1987-05-19 Masco Corporation Prefabricated multi-wall chimney
US5803127A (en) * 1985-12-16 1998-09-08 R & R Precision Corp. Coaxial piping systems
US4724750A (en) * 1986-12-04 1988-02-16 Van-Packer Company Double-walled chimney
US4781402A (en) * 1986-12-22 1988-11-01 Metal-Fab, Inc. Metal chimney assembly
US5125870A (en) * 1989-12-18 1992-06-30 G+H Montage Gmbh Flue insulation assembly
US6113155A (en) * 1996-04-12 2000-09-05 Constructions Metalliques Mecaniques Beirens C.M.M. Beirens, Sa Modular nesting metal conduit, in particular for discharging fumes
US6062608A (en) * 1998-07-29 2000-05-16 Marco Manufacturing, Inc. Coaxial flue-system for direct-vent fireplaces
US6076862A (en) * 1998-08-24 2000-06-20 Selkirk, Inc. Concentric snap-together direct vent structure and associated fabrication methods
US6634352B2 (en) * 2001-01-17 2003-10-21 American Metal Products Company Direct venting vent pipe
US6527013B2 (en) * 2001-01-27 2003-03-04 Horizon Resources Corporation Insulated jackets for hot and cold piping systems and for hot and cold air ducting systems and methods of use
US20070084036A1 (en) * 2003-06-18 2007-04-19 Benoit Gagne End-wise connection of second chimney components and method therefor
US20050029805A1 (en) * 2003-06-18 2005-02-10 Benoit Gagne End-wise connection of second chimney components and method therefor
US20060130411A1 (en) * 2004-12-21 2006-06-22 Edgar Glen A Rubber boot-based roof flashing apparatus
US7526895B2 (en) * 2004-12-21 2009-05-05 Selkirk Corporation Rubber boot-based roof flashing apparatus
US8505981B2 (en) * 2006-05-02 2013-08-13 M&G DuraVent, Inc. Gasket-less vent pipe coupling
US20070256682A1 (en) * 2006-05-02 2007-11-08 Jacklich John R Gasket-less vent pipe coupling
US20070257487A1 (en) * 2006-05-02 2007-11-08 Jacklich John R Exhaust system interlocking mechanism
US8672367B2 (en) 2006-05-02 2014-03-18 M&G DuraVent, Inc. Exhaust system interlocking mechanism
US20080169037A1 (en) * 2007-01-17 2008-07-17 Cryotech International, Inc. Cryogenic bayonet connection
US20090191802A1 (en) * 2008-01-25 2009-07-30 Brad Zogg Chimney Duct
US9644841B2 (en) * 2008-01-25 2017-05-09 The Schebler Co. Chimney duct
US10731781B2 (en) 2008-01-25 2020-08-04 The Schebler Co. Joint seal system and method
US10690343B2 (en) 2011-08-01 2020-06-23 Top Hat Chimney Systems, Inc. Universal chimney pipe cover
US9767931B2 (en) * 2014-02-24 2017-09-19 Ge-Hitachi Nuclear Energy Americas Llc Chimney structure with internal partitions having a common center, a reactor including the chimney structure, and a method of manufacturing the same
US20160069729A1 (en) * 2014-09-10 2016-03-10 Honeywell International Inc. Mechanical system for centering and holding a coax conductor in the center of an outer conductor
US9921096B2 (en) * 2014-09-10 2018-03-20 Honeywell International Inc. Mechanical system for centering and holding a coax conductor in the center of an outer conductor
US11255541B2 (en) 2015-11-22 2022-02-22 The Schebler Co. Joint seal system and method
US20200370749A1 (en) * 2019-05-24 2020-11-26 Air Distribution Technologies Ip, Llc Cross compatible adapter for chimney sections with different outer diameters
US11821626B2 (en) * 2019-05-24 2023-11-21 Cardinal Ip Holding, Llc Cross compatible adapter for chimney sections with different outer diameters
EP3943814A1 (en) * 2020-07-20 2022-01-26 Poujoulat Section of smoke duct of the type with two concentric tubes and manufacturing method thereof

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