US4192660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner including noise-limiting cool air intake nose
Assignee: Toyota Motor Corp
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Filing: 1978-04-19
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Granted: 1980-03-11
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Expires: 1998-04-19
Abstract
Abstract A device which eliminates an intake sound from an air cleaner nose from being confined in the cabin of a car and more specifically pertains to a noise-limiting device which converts the intake sound into such a sound that is not amplified to the interior of a car, comprises a tuning hole at the tip of a cool air intake nose extending from the air cleaner nose.
Inventors
- 👤 Takashi Ishidera
- 👤 Masahiko Enjoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:57
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/12; F02M35/1205; F02M35/1222; F02M35/10; F02M35/10006; F02M35/10013; F02M35/1238; F02M35/16; F02M35/161; F02M35/10091; F02M35/10104
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
In a combined air cleaner and cool air intake pipe for a carburator of an internal combustion engine for use within an engine compartment of an automobile, said air cleaner comprising an air inlet, and said cool air intake pipe having front and back open ends and being connected at said back end to said inlet with the front end of said cool air intake pipe being adapted to be located at the front end of said engine compartment, the improvement comprising: means to reduce noise within the automobile by reducing air column resonance within said cool air intake pipe including a tuning hole passing through the wall of said cool air intake pipe on the underside thereof and adjacent the front end thereof.
Claim 2
Dependent Claim
124 words
In a combined air cleaner and cool air intake pipe for a carburator of an internal combustion engine for use within an engine compartment of an automobile, said air cleaner comprising an air inlet, and said cool air intake pipe having front and back open ends and being connected at said back end to said inlet with the front end of said cool air intake pipe being adapted to be located at the front end of said engine compartment, the improvement comprising: means to reduce noise within the automobile by reducing air column resonance within said cool air intake pipe including a tuning hole passing through the wall of said cool air intake pipe on the underside thereof and adjacent the front end thereof.
Claim 3
Dependent Claim
22 words
The combined air cleaner and air intake pipe in accordance with claim 1 further comprising means to partially cover said tuning hole.
Claim 4
Dependent Claim
34 words
The combined air cleaner and air intake pipe in accordance with claim 2 wherein said covering means comprises means to vary the size of said tuning hole, said means comprising a slidable cover plate.
Claim 5
Dependent Claim
44 words
The combined air cleaner and air intake pipe in accordance with claim 2 wherein said covering means comprises an extension of the wall of said cool air intake pipe, said extension being disposed from the circumference of said pipe to provide said tuning opening.
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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |