Gas guide element with sound-absorbent walls for blocking and damping noise spreading from it into main conduits

• US 6,253,873 B1
• Filed: 05/11/1998
• Issued: 07/03/2001
• Est. Priority Date: 12/21/1994
• Status: Expired due to Fees

• Current Assignee: Albert Norres, Richard Norres
• Original Assignee: Albert Norres, Richard Norres
• Inventors: Norres, Albert, Norres, Richard
• Primary Examiner(s): Gray, David M.
• Application Number:
  US09/075,895
• Time in Patent Office: 1,149 Days
• Field of Search: 181/224, 181/252, 181/256, 181/279, 181/280
• US Class Current: 181/224
• CPC Class Codes: F16L 59/153 for flexible pipes
• CPC Class Codes: F16L 9/21 made of sound-absorbing materials or with sound-absorbing structure

Abstract

A gas guide element with sound absorbent walls for blocking or damping noise spreading into main conduits, the gas guide element comprising a guide element body including a flexible sound absorbent inner hose resistant to mechanical, chemical and caloric load exerted by a gas to be guided; an outer hose; and a soft and flexible sound absorbent intermediate layer of material disposed between said sound absorbent inner and outer hose, said inner hose being composed of a flexible material and having an outer side provided with weighted metal elements, said sound absorbent intermediate layer being composed of a randomly oriented pile of materials, and said guide element body having a gas inlet and a gas outlet and at least one 360° convolution between said gas inlet and said gas outlet.

Claims

1. A gas guide element with sound-absorbent walls for blocking or damping noise spreading into main conduits of a sound emitting machine, the gas guide element comprising a guide element body including a flexible sound absorbent inner hose resistant to mechanical, chemical and caloric load exerted by a gas to be guided;

an outer hose; and

a soft and flexible sound-absorbent intermediate layer of material disposed between said sound-absorbent inner and outer hose, said inner hose being composed of a flexible material and having an outer side provided with oscillating weighted metal elements which adsorb sound intensity, said sound adsorbent intermediate layer being composed of a randomly oriented pile of material into which said weighted metal elements are introduced, and said guide element body having a gas inlet and a gas outlet and at least one 360°

convolution between said gas inlet and said gas outlet.

2. A gas guide element as defined in claim 1, wherein said inner hose is composed of a material selected from the group consisting of a textile material a woven cloth of metal wire glass fiber, a synthetic material, a ceramic material, a non woven material, and a foil which is composed of a material selected from the group consisting of polyurethane, polyamide and polytetrafloroethylene.

3. A gas guide element as defined in claim 1, wherein said outer hose encloses said inner hose, said weighted metal elements being formed as a metal spiral arranged so that an intermediate space between an inner wall of said outer hose and an outer wall of said inner hose is filled with a filler.

4. A gas guide element as defined in claim 3;

and further comprising means for connecting one of said hose with said metal spiral, said connecting means including clamps.

5. A gas guide element as defined in claim 3;

and further comprising means for connecting one of said hose with said metal spiral, said connecting means including clip-in bands.

6. A gas guide element as defined in claim 1, wherein said intermediate layer is composed of the randomly oriented pile of material selected from the group consisting of mineral fibers, metal fibers, shavings, and chips of entropy-plastic materials.

7. A gas guide element as defined in claim 1, wherein said weighted metal elements are formed as individual rings which enclose said inner hose.

8. A gas guide element as defined in claim 1, wherein said inner hose is composed of hose sections, said weighted metal elements being formed as individual rings which hold together said inner hose composed of said hose sections.

9. A gas guide element as defined in claim 1, wherein said inner hose includes two spiral-shaped material strips having overlapping lateral ends, said weighted metal elements being formed as a metal spiral which holds together said two spiral-shaped material strips at said overlapping lateral ends.

10. A gas guide element as defined in claim 1, wherein said weighted metal elements are formed as metal pieces which are fastened regularly to the outer side of said inner hose.

11. A gas guide element as defined in claim 1, wherein said convolution has a shape selected from the group consisting of a circular spiral shape, an archimedean spiral shape, a hyperbolic spiral shape, a logarithmic spiral shape, an elliptic loop shape, an oval loop shape, a knotted convolution shape, a serpentine shape, and a sinusoidal serpentine shape.

12. A gas guide element as defined in claim 1, wherein said guide element body is provided with three convolutions between said gas inlet and said gas outlet.

13. A gas guide element as defined in claim 1, wherein said convolution is formed as a convolution with a narrow convolution radius.

14. A gas guide element as defined in claim 1, wherein said outer hose and said inner hose have identical constructions.

15. A gas guide element as defined in claim 1, wherein said outer hose is composed of a plastic selected from the group consisting of polytetrafluorethylene, polyamide, and polyester.

16. A gas guide element as defined in claim 1, wherein said intermediate layer and said inner hose have identical constructions.

17. A gas guide element as defined in claim 1, wherein said inner hose is composed if a fine stainless steel wire cloth, said intermediate layer and said outer hose being composed or a glass fiber reinforced cloth;

and further comprising an intermediate layer of material arranged between said inner hose and composed of stainless steel wool; and

an intermediate layer of material located between said intermediate hose and said outer hose and composed of mineral fiber wool.

18. A gas guide element as defined in claim 1, wherein said inner and outer hose are formed as spiral-shaped material strips having overlapping lateral ends;

and further comprising a metallic support body enclosed by said overlapping lateral ends; and

a clamping body enclosing said overlapping lateral ends and having a C-shaped cross-section, said clamping body having legs which are located opposite to one another at an opening and clamp said material strips at said overlapping lateral ends.

19. A gas guide element as defined in claim 1;

and further comprising a carrier in which said guide element body is disposed and which is movable together with said guide element body.