Patent US3929113A successfully refreshed from Google Patents.
US3929113A
Expired / Lapsed
US
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Fuel injection pump
Assignee: Bosch Corp
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Filing: 1974-04-29
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Granted: 1975-12-30
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Expires: 1994-04-29
Abstract
Abstract A fuel injection pump having two kinds of plungers rotatable by a common rack, one kind for supplying fuel and the other for ceasing fuel supply during the idling of an engine, comprising plungers for ceasing fuel supply during the idling of the engine, vertical grooves of metering helical grooves of said plungers being changed in width successively.
Inventors
- 👤 Koichi Kawase
- 👤 Yasuhide Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:36
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/20; F02M59/24; F02M59/26; F02M59/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
In a fuel injection pump comprising a plurality of pump devices each including a chamber and a plunger slidably disposed in oil tight relationship within the chamber, each said plunger including a helical control edge formed thereon which cooperates with a port in the chamber to control the amount of fuel supplied, said pump devices being controlled from a common fuel rod, and a plurality of said plungers including a vertical fuel supply groove which opens at the top of the plunger and is connected to the helical control edge at a portion of the latter which corresponds to the engine idling position, the improvement wherein the width of the vertical groove is varied for each said plunger so as to provide a predetermined variation in the total amount of fuel to be supplied to the engine.
Claim 2
Dependent Claim
137 words
In a fuel injection pump comprising a plurality of pump devices each including a chamber and a plunger slidably disposed in oil tight relationship within the chamber, each said plunger including a helical control edge formed thereon which cooperates with a port in the chamber to control the amount of fuel supplied, said pump devices being controlled from a common fuel rod, and a plurality of said plungers including a vertical fuel supply groove which opens at the top of the plunger and is connected to the helical control edge at a portion of the latter which corresponds to the engine idling position, the improvement wherein the width of the vertical groove is varied for each said plunger so as to provide a predetermined variation in the total amount of fuel to be supplied to the engine.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |