US5467747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise suppression enclosure for an engine
Assignee: Caterpillar Inc
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Filing: 1994-01-10
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Granted: 1995-11-21
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Expires: 2014-01-10
Abstract
Abstract Most existing noise reduction enclosures used with engines and engine driven equipment have failed to meet the reduced noise emission requirements of today and of the future. A few of the present enclosures meet the reduced noise emission requirements of today and of the future but are extremely expensive to purchase and are large bulky structures. The subject enclosure (10) is reasonably priced and provides an enclosure which is effective in reducing the noise emitted therefrom. The enclosure (10) includes a housing (32) having a generally rectangular configuration and being divided into an engine portion (56) defining an engine compartment (57) and a duct portion (54). The outlet ducts (88) having a length greater than the inlet ducts (84). To further enhance the noise reduction of the enclosure (10) a plurality of dynastic hardware is attached to the housing (32).
Inventors
- 👤 Everett G. Brandt
- 👤 M. Kathryn Christensen
- 👤 W. Charles Sahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:15
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/11; F02B77/13
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
162 words
A noise reduction enclosure (10) adapted for use with an engine (14), comprising: a housing (32) having a generally rectangular shape and being divided into a duct portion (54) and an engine portion (56); said duct portion (54) being disposed above said engine portion (56) and having an inlet opening (50) and an outlet opening (52) in fluid communication therewith; said duct portion (54) further including an inlet duct (84) through which a cooling medium (82) flows from said inlet opening (50) to said engine portion (56) and an outlet duct (88) through which said cooling medium (82) exits from said engine portion (56) to said outlet opening (52); said inlet duct (84) and said outlet duct (88) each having at least one curved portion (87,91) and being disposed adjacent one another within said duct portion (54); and an absorptive material (102) attached to at least a portion of the interior surfaces of said inlet duct (84) and said outlet duct (88).
Claim 2
Dependent Claim
162 words
A noise reduction enclosure (10) adapted for use with an engine (14), comprising: a housing (32) having a generally rectangular shape and being divided into a duct portion (54) and an engine portion (56); said duct portion (54) being disposed above said engine portion (56) and having an inlet opening (50) and an outlet opening (52) in fluid communication therewith; said duct portion (54) further including an inlet duct (84) through which a cooling medium (82) flows from said inlet opening (50) to said engine portion (56) and an outlet duct (88) through which said cooling medium (82) exits from said engine portion (56) to said outlet opening (52); said inlet duct (84) and said outlet duct (88) each having at least one curved portion (87,91) and being disposed adjacent one another within said duct portion (54); and an absorptive material (102) attached to at least a portion of the interior surfaces of said inlet duct (84) and said outlet duct (88).
Claim 3
Dependent Claim
44 words
The noise reduction enclosure (10) of claim 1, wherein one of said inlet duct (84) and said outlet duct (88) is disposed in said duct portion (54) between the other of said inlet duct (84) and outlet duct (88) and said engine portion (56).
Claim 4
Dependent Claim
30 words
The noise reduction enclosure (10) of claim 2, wherein said inlet duct (84) is disposed in said duct portion (54) between said outlet duct (88) and said engine portion (56).
Claim 5
Dependent Claim
45 words
The noise reduction enclosure (10) of claim 3 wherein said housing (32) includes a side wall (36) and an end wall (38), said inlet opening (50) being positioned in said side wall (36) and said outlet opening (52) being positioned in said end wall (38).
Claim 6
Dependent Claim
32 words
The noise reduction enclosure (18) of claim 1, wherein each of said inlet and outlet ducts (84,88) has a generally constant cross-sectional configuration along substantially the entire length of the ducts (84,88).
Claim 7
Dependent Claim
32 words
The noise reduction enclosure (18) of claim 5, wherein each of said inlet and outlet ducts (84,88) has a generally square cross-sectional configuration along substantially the entire length of the ducts (84,88).
Claim 8
Dependent Claim
70 words
The noise reduction enclosure (10) of claim 6, wherein said inlet duct (84) includes a partition (85) positioned within the inlet duct (84) dividing the inlet duct (84) into a pair of generally square cross-sectionally configured inlet ducts (84) and said outlet duct (88) includes a partition (89) positioned within the outlet duct (88) dividing the outlet duct (88) into a pair of generally square cross-sectionally configured outlet ducts (88).
Claim 9
Dependent Claim
35 words
The noise reduction enclosure (10) of claim 1, and further comprising a damping material (100) attached to at least a portion of the interior surfaces of said inlet duct (84) and said outlet duct (88).
Claim 10
Dependent Claim
33 words
The noise reduction enclosure (10) of claim 8, wherein said damping material is attached between the interior surfaces of said inlet duct (84) and said outlet duct (88) and said absorptive material (102).
Claim 11
Dependent Claim
19 words
The noise reduction enclosure (10) of claim 1, wherein said absorptive material (102) is constructed of an acoustic foam.
Claim 12
Dependent Claim
19 words
The noise reduction enclosure (10) of claim 1, wherein said absorptive material (102) is constructed of a fiberglass material.
Claim 13
Dependent Claim
24 words
The noise reduction enclosure (10) of claim 1, wherein each of said curved portions (87,91) is constructed having approximately a 90 degree angle curve.
Claim 14
Dependent Claim
59 words
The noise reduction enclosure (10) of claim 1, wherein said engine portion (56) defines an engine compartment (57) therein containing said engine (14), said engine compartment (57) being adapted for receiving said cooling medium (82) from said inlet duct (84) and exhausting said cooling medium (82) within said engine portion (56) prior to discharge to said outlet duct (88).
Claim 15
Dependent Claim
44 words
The noise reduction enclosure (10) of claim 13, wherein said engine portion (56) includes a plurality of guide vanes (92) adapted for receiving said cooling medium (82) from said engine compartment (57) and guidingly directing said cooling medium (82) into the outlet duct (88).
Claim 16
Dependent Claim
184 words
A noise reduction enclosure (10) adapted for use with an engine (14), comprising: a housing (32) having a generally rectangular shape and being divided into a duct portion (54) and an engine portion (56); said duct portion (54) being disposed above said engine portion (56) and having an inlet opening (50) and an outlet opening (52) in fluid communication therewith; said duct portion (54) further including an inlet duct (84) through which a cooling medium (82) flows from said inlet opening (50) to said engine portion (56) and an outlet duct (88) through which said cooling medium (82) exits from said engine portion (56) to said outlet opening (52); said inlet duct (84) and said outlet duct (88) being disposed adjacent one another within said duct portion (54) wherein one of said inlet duct (84) and said outlet duct (88) is disposed between the other of said inlet duct (84) and outlet duct (88) and said engine portion (56); and an absorptive material (102) attached to at least a portion of the interior surfaces of said inlet duct (84) and said outlet duct (88).
Claim 17
Dependent Claim
184 words
A noise reduction enclosure (10) adapted for use with an engine (14), comprising: a housing (32) having a generally rectangular shape and being divided into a duct portion (54) and an engine portion (56); said duct portion (54) being disposed above said engine portion (56) and having an inlet opening (50) and an outlet opening (52) in fluid communication therewith; said duct portion (54) further including an inlet duct (84) through which a cooling medium (82) flows from said inlet opening (50) to said engine portion (56) and an outlet duct (88) through which said cooling medium (82) exits from said engine portion (56) to said outlet opening (52); said inlet duct (84) and said outlet duct (88) being disposed adjacent one another within said duct portion (54) wherein one of said inlet duct (84) and said outlet duct (88) is disposed between the other of said inlet duct (84) and outlet duct (88) and said engine portion (56); and an absorptive material (102) attached to at least a portion of the interior surfaces of said inlet duct (84) and said outlet duct (88).
Claim 18
Dependent Claim
30 words
The noise reduction enclosure (10) of claim 15, wherein said inlet duct (84) is disposed in said duct portion (54) between said outlet duct (88) and said engine portion (56).
Claim 19
Dependent Claim
45 words
The noise reduction enclosure (10) of claim 16 wherein said housing (32) includes a side wall (36) and an end wall (38), said inlet opening (50) being positioned in said side wall (36) and said outlet opening (52) being positioned in said end wall (38).
Claim 20
Dependent Claim
159 words
A noise reduction enclosure (10) adapted for use with an engine (14), comprising: a housing (32) having a generally rectangular shape and being divided into a duct portion (54) and an engine portion (56); said duct portion (54) being disposed above said engine portion (56) and having an inlet opening (50) and an outlet opening (52) in fluid communication therewith; said duct portion (54) further including an inlet duct (84) through which a cooling medium (82) flows from said inlet opening (50) to said engine portion (56) and an outlet duct (88) through which said cooling medium (82) exits from said engine portion (56) to said outlet opening (52); said inlet duct (84) and said outlet duct (88) each having a generally constant cross-sectional configuration along substantially the entire length of the ducts (84,88); and an absorptive material (102) attached to at least a portion of the interior surfaces of said inlet duct (84) and said outlet duct (88).
Claim 21
Dependent Claim
159 words
A noise reduction enclosure (10) adapted for use with an engine (14), comprising: a housing (32) having a generally rectangular shape and being divided into a duct portion (54) and an engine portion (56); said duct portion (54) being disposed above said engine portion (56) and having an inlet opening (50) and an outlet opening (52) in fluid communication therewith; said duct portion (54) further including an inlet duct (84) through which a cooling medium (82) flows from said inlet opening (50) to said engine portion (56) and an outlet duct (88) through which said cooling medium (82) exits from said engine portion (56) to said outlet opening (52); said inlet duct (84) and said outlet duct (88) each having a generally constant cross-sectional configuration along substantially the entire length of the ducts (84,88); and an absorptive material (102) attached to at least a portion of the interior surfaces of said inlet duct (84) and said outlet duct (88).
Claim 22
Dependent Claim
32 words
The noise reduction enclosure (18) of claim 18 wherein each of said inlet and outlet ducts (84,88) have a generally square cross-sectional configuration along substantially the entire length of the ducts (84,88).
Claim 23
Dependent Claim
70 words
The noise reduction enclosure (10) of claim 19 wherein said inlet duct (84) includes a partition (85) positioned within the inlet duct (84) dividing the inlet duct (84) into a pair of generally square cross-sectionally configured inlet ducts (84) and said outlet duct (88) includes a partition (89) positioned within the outlet duct (88) dividing the outlet duct (88) into a pair of generally square cross-sectionally configured outlet ducts (88).
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) | 1998-11-20 | 1999-05-22 | 1999-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-20 | 2003-05-22 | 2003-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-20 | 2007-05-22 | 2007-11-21 | $7700.00 | Window Closed / Lapsed |