US5140854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake air quantity measuring apparatus
Assignee: Aisan Industry Co Ltd
•
Filing: 1991-04-26
•
Granted: 1992-08-25
•
Expires: 2011-04-26
Abstract
Abstract An arrangement for measuring a quantity of intake air passing through an intake air duct by a sensing element disposed in parallel with a flow direction of the intake air. The sensing element includes a flow speed sensing resistor deposited on a base plate and formed into a film for sensing a flow speed of the intake air, and a pair of lead members deposited on the base plate and electrically connected to the resistor. The flow speed sensing resistor is arranged to form a temperature distribution of the resistor uniform in a direction parallel with and/or perpendicular to the flow direction of the intake air.
Inventors
- 👤 Yasunori Sakaue
- 👤 Shinichi Sakakibara
- 👤 Mamoru Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:57
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F1/684; G01F1/688; G01F1/69; G01F1/692; G01P; G01P5/00; G01P5/10; G01P5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
An apparatus for measuring intake air quantity comprising: a flat base plate disposed in an intake air duct with the flat surface of said base plate positioned in parallel with a flow direction of an intake air passing through said intake air duct; a flow speed sensing resistor deposited on said base plate and formed into a film, said flow speed sensing resistor having an ohmic value varying in response to change in temperature of said resistor depending upon a flow speed of said intake air; a pair of lead members deposited on said base plate and electrically connected to said flow speed sensing resistor; and a layer of high thermal conductivity deposited on said flow speed sensing resistor for covering at least a part thereof wherein, said thermal conductive layer si provided between said flow speed sensing resistor and said base plate and in contact with said base plate.
Claim 2
Independent Claim
150 words
An apparatus for measuring intake air quantity comprising: a flat base plate disposed in an intake air duct with the flat surface of said base plate positioned in parallel with a flow direction of an intake air passing through said intake air duct; a flow speed sensing resistor deposited on said base plate and formed into a film, said flow speed sensing resistor having an ohmic value varying in response to change in temperature of said resistor depending upon a flow speed of said intake air; a pair of lead members deposited on said base plate and electrically connected to said flow speed sensing resistor; and a layer of high thermal conductivity deposited on said flow speed sensing resistor for covering at least a part thereof wherein, said thermal conductive layer si provided between said flow speed sensing resistor and said base plate and in contact with said base plate.
References Cited (Backward Citations)
US3996799A
Cited
JPS57201858A
Cited
US4449402A
Cited
US4478076A
Cited
JPS59151020A
Cited
JPS60183825A
Cited
JPS60230019A
Cited
JPS60236029A
Cited
US4691566A
Cited
US4843882A
Cited
US4635475A
Cited
US4682503A
Cited
JPS63195229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |