US4526027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-calibrated fuel quantity capacitive probe
Assignee: Simmonds Precision Products Inc
•
Filing: 1983-11-23
•
Granted: 1985-07-02
•
Expires: 2003-11-23
Abstract
No abstract record available.
Inventors
- 👤 Cecil Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:26
CPC Classifications
G; G01; G01F; G01F25/00; G01F25/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
An apparatus for pre-calibrating a fuel quantity capacitance-type probe before operational use thereof having a low impedence electrode and a high impedance electrode, comprising an excitation source, a voltage divider means connected to said excitation source and said low impedance electrode, and said voltage divider having a first fixed value resistor and a second resistor whose value is selected to effect the dry value of said probe within a small tolerance of approximately 1% above a given design value of capacitance for said probe.
Claim 2
Independent Claim
84 words
An apparatus for pre-calibrating a fuel quantity capacitance-type probe before operational use thereof having a low impedence electrode and a high impedance electrode, comprising an excitation source, a voltage divider means connected to said excitation source and said low impedance electrode, and said voltage divider having a first fixed value resistor and a second resistor whose value is selected to effect the dry value of said probe within a small tolerance of approximately 1% above a given design value of capacitance for said probe.
Claim 3
Dependent Claim
17 words
An apparatus according to claim 1, wherein the value of said fixed resistor is approximately 100 κΩ.
Claim 4
Dependent Claim
14 words
An apparatus according to claim 2, wherein said excitation source is approximately 6 KHZ.
References Cited (Backward Citations)
US3827300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |