Patent US4877106A successfully refreshed from Google Patents.
US4877106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound-attenuating discharge apparatus for a packaged terminal air conditioner
Assignee: Carrier Corp
•
Filing: 1988-04-29
•
Granted: 1989-10-31
•
Expires: 2008-04-29
Abstract
Abstract A noise attenuating assembly for use in conjuction with an air conditioning unit having a sloped discharge opening is disclosed. The assembly includes a front wall and a pair of side walls forming a flow path for the conditioned air which is discharged to the space containing the unit. The assembly has a layer of sound attenuating material attached to the inside surface of the walls so that the assembly deflects and absorbs line-of-sight sound produced by the unit fan, thus reducing the noise level of the unit.
Inventors
- 👤 Donald G. Neville
- 👤 David A. Giordano
- 👤 Mark R. Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:20
CPC Classifications
E; E04; E04F; E04F17/00; E04F17/04; Y; Y10; Y10S; Y10S454/00; Y10S454/906
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
144 words
In a unit having a fan for moving air to be conditioned through the unit and a discharge opening sloping downward from a top of the unit covered by a removable grille for discharging conditioned air to a space containing the unit, a silencer for attenuating noise generated by the fan comprising: a vertically projecting assembly adapted to be connected to the sloped discharge opening in place of said grille and defining a flow path for the conditioned air discharged to the space containing the unit, said assembly including a generally vertical front wall and two generally vertical side walls connected to said front wall, said assembly having means attached to at least one said wall for securing said assembly to the unit, and a sound attenuating material layer means adapted to be connected to an inside surface of said walls for absorbing sound.
Claim 2
Dependent Claim
144 words
In a unit having a fan for moving air to be conditioned through the unit and a discharge opening sloping downward from a top of the unit covered by a removable grille for discharging conditioned air to a space containing the unit, a silencer for attenuating noise generated by the fan comprising: a vertically projecting assembly adapted to be connected to the sloped discharge opening in place of said grille and defining a flow path for the conditioned air discharged to the space containing the unit, said assembly including a generally vertical front wall and two generally vertical side walls connected to said front wall, said assembly having means attached to at least one said wall for securing said assembly to the unit, and a sound attenuating material layer means adapted to be connected to an inside surface of said walls for absorbing sound.
Claim 3
Dependent Claim
29 words
In a unit as set forth in claim 1 wherein said vertically projecting assembly projects vertically to a height generally in a plane with the top of the unit.
Claim 4
Dependent Claim
18 words
In a unit as set forth in claim 1 wherein said sound attenuating material layer means is fiberglass.
Claim 5
Dependent Claim
23 words
In a unit as set forth in claim 3 wherein said fiberglass layer is generally equal to or less than 3/4 inch thick.
Claim 6
Dependent Claim
104 words
A sound attenuating assembly for use in an air discharge stream of a sloped front unit for supplying conditioned air to a space, said assembly comprising: a muffler member having at least a generally vertical front wall and two spaced apart generally vertical side walls forming a vertical flow path for the air discharge stream; and a layer of sound attenuating material adapted to be connected to an inside surface of said walls for absorbing sound, said muffler member adapted to be removably connected to the sloped front of the unit to reduce the noise of the unit transmitted along a direct line-of-sight path.
Claim 7
Dependent Claim
104 words
A sound attenuating assembly for use in an air discharge stream of a sloped front unit for supplying conditioned air to a space, said assembly comprising: a muffler member having at least a generally vertical front wall and two spaced apart generally vertical side walls forming a vertical flow path for the air discharge stream; and a layer of sound attenuating material adapted to be connected to an inside surface of said walls for absorbing sound, said muffler member adapted to be removably connected to the sloped front of the unit to reduce the noise of the unit transmitted along a direct line-of-sight path.
Claim 8
Dependent Claim
19 words
A sound attenuating assembly as set forth in claim 5 wherein said layer of sound attenuating material is fiberglass.
Claim 9
Dependent Claim
24 words
A sound attenuating assembly as set forth in claim 6 wherein said fiberglass layer is generally equal to or less than 3/4 inch thick.
Claim 10
Independent Claim
103 words
A method of reducing the noise along a line-of-sight path generated by a fan of a unit supplying conditioned air to a space and having a sloped discharge opening covered by a removable grille comprising the steps of: removing the grille from the sloped discharge opening; providing a silencer assembly around the sloped discharge opening, the silencer assembly defining a vertical flow path for the conditioned air discharged from the sloped discharge opening and providing a horizontal discharge opening at an outlet end of said silencer assembly; and providing a layer of sound attenuating material around an inner surface of said silencer assembly.
Claim 11
Independent Claim
103 words
A method of reducing the noise along a line-of-sight path generated by a fan of a unit supplying conditioned air to a space and having a sloped discharge opening covered by a removable grille comprising the steps of: removing the grille from the sloped discharge opening; providing a silencer assembly around the sloped discharge opening, the silencer assembly defining a vertical flow path for the conditioned air discharged from the sloped discharge opening and providing a horizontal discharge opening at an outlet end of said silencer assembly; and providing a layer of sound attenuating material around an inner surface of said silencer assembly.
Claim 12
Dependent Claim
26 words
The method of reducing the noise as set forth in claim 8 further including the step of reinstalling the removed grille in said horizontal discharge opening.
References Cited (Backward Citations)
US2704504A
Cited
US4050364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |