Patent US4789924A successfully refreshed from Google Patents.
US3653784A
Expired / Lapsed
US
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Proportionating feed pump
Assignee: Audi AG
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Filing: 1970-06-16
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Granted: 1972-04-04
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Expires: 1990-06-16
Abstract
Abstract The invention relates to a proportioning pump for feeding at least two different liquids in a definite flow proportion. The pump has two interconnected displacement members executing their suction strokes and their delivery strokes simultaneously, each of which members is arranged in its own working chamber communicating with a suction and a pressure line by oppositely acting check valves. In accordance, with a particular application, this pump is employed in internal combustion engines with mixed lubrication for proportioning the fuel and oil, with the fuel-oil mixture being supplied to the float chamber of a carburetor.
Inventors
- 👤 Wulf Leitermann
- 👤 Gerhard Maurhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:52
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/02; F04B7/0266; F04B7/0275; F01; F01L; F01L23/00; F01M; F01M3/00; F04B13/00; F04B13/02; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B43/00; F04B43/02; F04B43/06; F04B43/073; F04B53/00; F04B53/10; F04B53/102; F04B53/1032; F04B9/00; F04B9/02; F04B9/06; F04B9/08; F04B9/12; F04B9/1207; F04B9/123; F04B9/127; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
A proportionating pump for feeding fuel and oil in a definite mixture ratio for mixture-lubricated internal combustion engines, wherein the pump has two displacement members, one for fuel and the other for oil, which perform their suction strokes simultaneously and their delivery strokes simultaneously, the delivery strokes being effected by spring means and the suction strokes being effected by a controlled drive medium supplied at the end of the full stroke effected by said spring means and shut off at the end of the full stroke effected by said drive medium, each displacement member being arranged in its own working chamber communicating with a suction and a delivery line by way of opposedly acting check valves, the check valve in the suction line of the oil-carrying working chamber being actuated in the opening direction by the drive medium effecting the suction stroke and simultaneously therewith.
Claim 2
Dependent Claim
145 words
A proportionating pump for feeding fuel and oil in a definite mixture ratio for mixture-lubricated internal combustion engines, wherein the pump has two displacement members, one for fuel and the other for oil, which perform their suction strokes simultaneously and their delivery strokes simultaneously, the delivery strokes being effected by spring means and the suction strokes being effected by a controlled drive medium supplied at the end of the full stroke effected by said spring means and shut off at the end of the full stroke effected by said drive medium, each displacement member being arranged in its own working chamber communicating with a suction and a delivery line by way of opposedly acting check valves, the check valve in the suction line of the oil-carrying working chamber being actuated in the opening direction by the drive medium effecting the suction stroke and simultaneously therewith.
Claim 3
Dependent Claim
43 words
A pump according to claim 1, comprising a mixing chamber into which the delivery lines from the two working chambers lead, the outlets of the two delivery lines being controlled by a common check valve which opens or closes both delivery lines simultaneously.
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |