Patent US4020900A successfully refreshed from Google Patents.
US4020900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for ventilating cooling air of construction
Assignee: Komatsu Ltd
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Filing: 1974-06-25
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Granted: 1977-05-03
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Expires: 1994-06-25
Abstract
Abstract A device for ventilating cooling air for cooling the coolant of a water-cooled engine of a construction machine having inlets and outlets for cooling the air for which dissipates the heat of the coolant of the engine. At least one of said inlets and outlets are directed elevationally upwardly or downwardly with respect to the machinery, and thus the noise generated from the engine is remarkably reduced.
Inventors
- 👤 Kunio Kitagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:02
CPC Classifications
B; B60; B60K; B60K11/00; B60K11/02; B60K11/04; F; F01; F01P; F01P11/00; F01P11/12; F02; F02B; F02B77/00; F02B77/11; F02B77/13; F24; F24F; F24F13/00; F24F13/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A device for ventilating cooling air for cooling a coolant of an engine of a construction vehicle having a water cooled engine within a housing and for reducing the noise of the engine emitted through said device, said device comprising at least one inlet and outlet means mounted on the exterior of said housing for directing cooling air, which dissipates the heat of the coolant, vertically with respect to the body of the vehicle, said inlet and outlet means each comprising a plurality of ducts formed by a plurality of parallel reinforcing ribs and noise-absorbing material which covers the inner surface of said ducts whereby the noise of said engine passing through said inlet and outlet means is substantially reduced.
Claim 2
Independent Claim
120 words
A device for ventilating cooling air for cooling a coolant of an engine of a construction vehicle having a water cooled engine within a housing and for reducing the noise of the engine emitted through said device, said device comprising at least one inlet and outlet means mounted on the exterior of said housing for directing cooling air, which dissipates the heat of the coolant, vertically with respect to the body of the vehicle, said inlet and outlet means each comprising a plurality of ducts formed by a plurality of parallel reinforcing ribs and noise-absorbing material which covers the inner surface of said ducts whereby the noise of said engine passing through said inlet and outlet means is substantially reduced.
Claim 3
Dependent Claim
42 words
A device as set forth in claim 1, wherein at least one of said inlet and outlet means is mounted on the front of said vehicle and the opening in said ducts face both up and down with respect to said vehicle.
Claim 4
Dependent Claim
27 words
A device as set forth in claim 1, wherein said inlet and outlet means includes buffer means mounted between said plurality of ducts and said vehicle body.
Claim 5
Dependent Claim
39 words
A device as set forth in claim 1, further comprising a guard means provided at the front of the vehicle body, wherein at least one of said inlet means or said outlet means is mounted on said guard means.
Claim 6
Dependent Claim
43 words
A device as set forth in claim 4, further comprising a duct means provided at at least one side of an engine room of the vehicle, at least one of said inlet means and said outlet means being mounted over said duct means.
Claim 7
Dependent Claim
43 words
A device as set forth in claim 1, further comprising a duct means provided at at least one side of an engine room of the vehicle at least one of said inlet means and said outlet means being mounted over said duct meas.
Claim 8
Dependent Claim
31 words
A device as set forth in claim 6, wherein at least one of said inlet means and said outlet means is detachably mounted on a side plate of the engine room.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |