US3748085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace silencers
Assignee: Individual
•
Filing: 1972-03-10
•
Granted: 1973-07-24
•
Expires: 1992-03-10
Abstract
Abstract The noise generated by the burners of industrial furnaces is suppressed by attaching to the bottom of the furnace below the burners a chamber which is internally insulated with acoustical insulation means and which is provided with at least one similarly insulated baffle member over which the air fed to the burners must flow from adjustable dampened air intake means. The bottom of the chamber is provided with the air intake means and with outwardly openable inwardly insulated doors providing access to the furnace burners during operation.
Inventors
- 👤 J Poepsel
- 👤 P Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:32
CPC Classifications
F; F23; F23M; F23M20/00; F23M20/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
178 words
Apparatus for attachment to the bottom of a furnace having burners which generate noise which comprises: wall means forming an open-ended chamber attachable at the open end to said furnace below the burners; at least acoustical insulation means lining the inner wall of said chamber; hinged doors forming the bottom of said chamber connected to said chamber and adapted to swing outwardly; the inner side of said doors being lined at least with acoustical insulation means; at least a baffle member spaced from the inner surface of said wall means of and extending parallel across said chamber a distance substantially below the open end of the wall means; said baffle member having at least acoustical insulation means covering it; air intake means formed in said chamber such that air flow to said burners is over said baffle member; and adjustable dampers in said air intake means; the size of the air intake means and the depth of the chamber being selected to provide a velocity through the chamber less than that which causes the furnace to operate inefficiently.
Claim 2
Dependent Claim
178 words
Apparatus for attachment to the bottom of a furnace having burners which generate noise which comprises: wall means forming an open-ended chamber attachable at the open end to said furnace below the burners; at least acoustical insulation means lining the inner wall of said chamber; hinged doors forming the bottom of said chamber connected to said chamber and adapted to swing outwardly; the inner side of said doors being lined at least with acoustical insulation means; at least a baffle member spaced from the inner surface of said wall means of and extending parallel across said chamber a distance substantially below the open end of the wall means; said baffle member having at least acoustical insulation means covering it; air intake means formed in said chamber such that air flow to said burners is over said baffle member; and adjustable dampers in said air intake means; the size of the air intake means and the depth of the chamber being selected to provide a velocity through the chamber less than that which causes the furnace to operate inefficiently.
Claim 3
Dependent Claim
18 words
Apparatus in accordance with claim 1 in which the chamber forming means is removably attached to the furnace.
Claim 4
Dependent Claim
18 words
Apparatus in accordance with claim 1 in which the chamber forming means is fixedly attached to the furnace.
Claim 5
Dependent Claim
12 words
Apparatus in accordance with claim 1 in which the chamber is rectangular.
Claim 6
Dependent Claim
20 words
Apparatus in accordance with claim 1 in which the doors are formed of aluminum inner lined with acoustical insulation means.
Claim 7
Dependent Claim
26 words
Apparatus in accordance with claim 1 in which the acoustical means is covered by heat insulation means which in turn is covered with metal mesh means.
Claim 8
Dependent Claim
20 words
Apparatus in accordance with claim 6 in which the heat insulation means covering said acoustical insulation means is asbestos cloth.
Claim 9
Dependent Claim
15 words
Apparatus in accordance with claim 6 in which the mesh means is expanded metal mesh.
Claim 10
Dependent Claim
64 words
Apparatus in accordance with claim 1 in which the chamber is rectangular and has a depth in the range from about 2 to about 4 feet, the size of the air intake means is controlled by said dampers in the range between about 1 and 12 inches, and the air intake means is arranged between the baffle member and a wall of said chamber.
Claim 11
Dependent Claim
15 words
Apparatus in accordance with claim 1 in which acoustical insulation means is fiber glass insulation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |