US4088012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection metering system
Assignee: Leslie Hartridge Ltd
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Filing: 1977-02-25
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Granted: 1978-05-09
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Expires: 1997-02-25
Abstract
Abstract Metering apparatus for measuring the quantity of fuel oil delivered by engine fuel-injection means when being tested on a test bench or other testing machine embodying or connected to the said metering apparatus, comprising transparent or part-transparent graduates having plungers or pistons within them which, in use of the apparatus, are displaced in one direction by fuel oil delivered from the injection equipment under test to the graduates, and in the other direction by fuel oil (or other liquid, if desired) delivered from a test bench or other source of supply, the plungers or pistons being readily visible so as to give a direct and accurate reading of the quantity of fuel oil delivered to each graduate.
Inventors
- 👤 Reginald S. Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:03
CPC Classifications
F; F02; F02M; F02M65/00; F02M65/002; G; G01; G01F; G01F1/00; G01F9/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
In metering apparatus for measuring the quantity of fuel oil delivered by engine fuel-injection means when being tested on a testing machine associated with said metering apparatus, the improvements wherein the apparatus comprises a plurality of at least partly transparent graduates, a displaceable piston within each graduate, each such piston having a leak-proof sliding fit with the respective graduate whereby no fuel oil is able to flow through the graduates, fuel oil supply passages connected to said graduates on one side of each piston to displace the pistons in one direction by fuel oil delivered from engine fuel-injection means under test, and further liquid supply passages connected to said graduates on the other side of each piston to displace the pistons in the other direction by liquid delivered from a source of supply, the pistons in the graduates being readily visible so as to give a direct and accurate reading of the quantity of fuel oil delivered to each graduate.
Claim 2
Dependent Claim
160 words
In metering apparatus for measuring the quantity of fuel oil delivered by engine fuel-injection means when being tested on a testing machine associated with said metering apparatus, the improvements wherein the apparatus comprises a plurality of at least partly transparent graduates, a displaceable piston within each graduate, each such piston having a leak-proof sliding fit with the respective graduate whereby no fuel oil is able to flow through the graduates, fuel oil supply passages connected to said graduates on one side of each piston to displace the pistons in one direction by fuel oil delivered from engine fuel-injection means under test, and further liquid supply passages connected to said graduates on the other side of each piston to displace the pistons in the other direction by liquid delivered from a source of supply, the pistons in the graduates being readily visible so as to give a direct and accurate reading of the quantity of fuel oil delivered to each graduate.
Claim 3
Dependent Claim
13 words
Apparatus according to claim 1 having at least two different sizes of gruadate.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 1 having at least one valve to control the supply of fuel oil to be measured to the graduates.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 1 comprising means permitting liquid above the pistons to escape from the graduates through valve-controlled passages so that the pistons may be displaced by fuel oil to be measured which enters the graduates below the pistons.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |