Patent US4299121A successfully refreshed from Google Patents.
US4299121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction system in an engine
Assignee: Mitsubishi Electric Corp
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Filing: 1980-03-07
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Granted: 1981-11-10
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Expires: 2000-03-07
Abstract
Abstract In a suction system in an engine a suction air volume detecting means utilizing a von Karman's vortex air flowmeter principle has its upstream side and downstream side being in communication with an air cleaning chamber and an expansion chamber, respectively, with a vibration membrane being disposed therebetween, whereby the influence of the pulsating suction air on the suction air volume detecting means is effectively suppressed so that it operates stably.
Inventors
- 👤 Yoshiaki Asayama
- 👤 Kazuyuki Mizuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:37
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/72; G01F1/05; G01F1/20; G01F1/32; G01F1/3209
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
A suction system in an engine comprising a suction air volume detecting means to detect the volume of air to be sucked into said engine, an air cleaning chamber in communication with said suction air volume detecting means at its upstream side, an expansion chamber in communication with said suction air volume detecting means at its downstream side and disposed in adjoining relation with said air cleaning chamber, and a vibration membrane disposed between said cleaning chamber and said expansion chamber so as to separate them.
Claim 2
Dependent Claim
86 words
A suction system in an engine comprising a suction air volume detecting means to detect the volume of air to be sucked into said engine, an air cleaning chamber in communication with said suction air volume detecting means at its upstream side, an expansion chamber in communication with said suction air volume detecting means at its downstream side and disposed in adjoining relation with said air cleaning chamber, and a vibration membrane disposed between said cleaning chamber and said expansion chamber so as to separate them.
Claim 3
Dependent Claim
25 words
A suction system in an engine as clained in claim 1 wherein said suction air volume detecting means is a von Karman's vortex airflow meter.
Claim 4
Dependent Claim
18 words
A suction system in an engine as claimed in claim 1 wherein said vibration membrane is a diaphragm.
Claim 5
Dependent Claim
38 words
A suction system in an engine as claimed in claim 1 or 2 wherein said air cleaning chamber and said expansion chamber are additionally connected by a bypass tube in parallel with said suction air volume detecting means.
References Cited (Backward Citations)
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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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |