Patent US4116269A successfully refreshed from Google Patents.
US4116269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine radiator with means for noise reduction
Assignee: Komatsu Ltd
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Filing: 1976-04-27
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Granted: 1978-09-26
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Expires: 1996-04-27
Abstract
Abstract For reduction of high intensity sound produced through resonance by a radiator core when the rate of airflow therethrough, supplied by an engine-driven fan, exceeds a critical degree, a plurality of baffle plates are installed on the downstream or upstream side of the radiator core. The baffle plates are spaced from each other in a direction at right angles with the direction of the airflow through the radiator core, in such a manner as to inhibit the resonance of the radiator core when the rate of the airflow exceeds the critical degree.
Inventors
- 👤 Hiromichi Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:42
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F01; F01P; F01P11/00; F01P11/12; F01P3/00; F01P3/18; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/311; Y10S165/312
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
In a radiator having a core arranged opposite to an engine-driven fan adapted to supply airflow therethrough, wherein sound pressure waves having crests and roots are formed when the rate of airflow exceeds a critical value, the improvement comprising a means for reducing high intensity sound produced when the rate of airflow exceeds said critical value, said means comprising a plurality of fixedly mounted baffle plates, said baffle plates being positioned downstream in straight-line adjacency parallel with the airflow through said core, said baffle plates being spaced apart from each other in a direction at right angles to the direction of the airflow through said core, the positioning of said plates corresponding to the location of said crests and roots, wherein resonance of said core is minimized when the airflow through said core exceeds said critical value.
Claim 2
Dependent Claim
137 words
In a radiator having a core arranged opposite to an engine-driven fan adapted to supply airflow therethrough, wherein sound pressure waves having crests and roots are formed when the rate of airflow exceeds a critical value, the improvement comprising a means for reducing high intensity sound produced when the rate of airflow exceeds said critical value, said means comprising a plurality of fixedly mounted baffle plates, said baffle plates being positioned downstream in straight-line adjacency parallel with the airflow through said core, said baffle plates being spaced apart from each other in a direction at right angles to the direction of the airflow through said core, the positioning of said plates corresponding to the location of said crests and roots, wherein resonance of said core is minimized when the airflow through said core exceeds said critical value.
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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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |