Patent US3758241A successfully refreshed from Google Patents.
US3758241A
Expired / Lapsed
US
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Fuel injection pump for multi-cylinder internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1972-08-01
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Granted: 1973-09-11
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Expires: 1992-08-01
Abstract
Abstract In a fuel injection pump a pump-and-distributor member is axially movably and rotatably disposed between two axially parallel compression springs which are spaced apart 180* with respect to the pump axis and which, through a common yoke, oppose the pressure strokes of said member. A control sleeve is slidably and rotatably arranged on said pump-and-distributor member for altering the starting moment and the period of injection. The angular and axial displacement of the control sleeve is effected by actuating elements connected to said control sleeve and arranged radially outwardly thereof.
Inventors
- 👤 F Eheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:07
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/125; F02M41/126; F02M41/121
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
In a fuel injection pump serving a multi-cylinder internal combustion engine and being of the known type that has (a) a pump-and-distributor member, (b) means for continuously rotating said pump-and-distributor member, (c) means causing said pumpand-distributor member to periodically execute pressure strokes, (d) meAns continuously exerting an axially directed force on said pump-and-distributor member, said force opposing the displacement thereof in executing said delivery strokes, (e) at least one control sleeve slidably mounted on said pump-and-distributor member, (f) groove means provided on said pump-and-distributor member and cooperating with said control sleeve to control, dependent upon the position of the latter, the fuel injection during each said pressure stroke, the improvement comprising, A. a plurality of spaced compression springs disposed axially parallel and adjacent said pump-and-distributor member, B. means connecting said springs to said pump-and-distributor member, said springs constituting said means continuously exerting an axially directed force on said pump-and-distributor member and C. setting means passing through the space between two adjacent springs and connected to said control sleeve to displace the same.
Claim 2
Dependent Claim
172 words
In a fuel injection pump serving a multi-cylinder internal combustion engine and being of the known type that has (a) a pump-and-distributor member, (b) means for continuously rotating said pump-and-distributor member, (c) means causing said pumpand-distributor member to periodically execute pressure strokes, (d) meAns continuously exerting an axially directed force on said pump-and-distributor member, said force opposing the displacement thereof in executing said delivery strokes, (e) at least one control sleeve slidably mounted on said pump-and-distributor member, (f) groove means provided on said pump-and-distributor member and cooperating with said control sleeve to control, dependent upon the position of the latter, the fuel injection during each said pressure stroke, the improvement comprising, A. a plurality of spaced compression springs disposed axially parallel and adjacent said pump-and-distributor member, B. means connecting said springs to said pump-and-distributor member, said springs constituting said means continuously exerting an axially directed force on said pump-and-distributor member and C. setting means passing through the space between two adjacent springs and connected to said control sleeve to displace the same.
Claim 3
Dependent Claim
27 words
An improvement as defined in claim 1, said springs being two in number and being spaced apart 180* with respect to the axis of said pump-and-distributor member.
Claim 4
Dependent Claim
35 words
An improvement as defined in claim 1, said means connecting said springs to said pump-and-distributor member being formed of a sole yoke supporting one end of said springs and including means engaging said pump-and-distributor member.
Claim 5
Dependent Claim
47 words
An improvement as defined in claim 3, including a disc means affixed to said pump-and-distributor member and having an annular surface of spherical configuration, said means engaging said pump-and-distributor member and forming part of said yoke including a complemental spherical surface in engagement with said disc means.
Claim 6
Dependent Claim
14 words
An improvement as defined in claim 3, including means securing said yoke against rotation.
Claim 7
Dependent Claim
22 words
An improvement as defined in claim 5, said lastnamed means being formed of axially parallel fixed guiding pins passing through said yoke.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |