US3908911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1974-01-25
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Granted: 1975-09-30
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Expires: 1994-01-25
Abstract
Abstract A fuel injection nozzle for internal combustion engines which include a hollow screw for fastening the nozzle to the cylinder head of the engine. The nozzle further includes a nozzle holder into which an annular groove extends from the outer surface thereof. There is also provided a snap ring device which partially and radially engages the annular groove.
Inventors
- 👤 Karl Hofmann
- 👤 Walter Mladek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:26
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
In a fuel injection nozzle which is fastened to a cylinder head of an internal combustion engine having a nozzle holder and a hollow screw for fastening the nozzle to the cylinder head, the improvement comprising an annular groove extending into the nozzle holder from the outer surface thereof and a snap ring device which partially and radially engages the annual groove, said snap ring device having a circular cross section, wherein the hollow screw is provided with an internal groove extending into the hollow screw from the inner surface thereof, said internal groove covering a portion of the snap ring in its circumferential direction and securing it with respect to radial deflection, and wherein said internal groove is tapered in the axial direction of the nozzle facing away from the engine such that the snap ring device is radially tensioned when the nozzle is axially fastened to the cylinder head.
Claim 2
Dependent Claim
151 words
In a fuel injection nozzle which is fastened to a cylinder head of an internal combustion engine having a nozzle holder and a hollow screw for fastening the nozzle to the cylinder head, the improvement comprising an annular groove extending into the nozzle holder from the outer surface thereof and a snap ring device which partially and radially engages the annual groove, said snap ring device having a circular cross section, wherein the hollow screw is provided with an internal groove extending into the hollow screw from the inner surface thereof, said internal groove covering a portion of the snap ring in its circumferential direction and securing it with respect to radial deflection, and wherein said internal groove is tapered in the axial direction of the nozzle facing away from the engine such that the snap ring device is radially tensioned when the nozzle is axially fastened to the cylinder head.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |