Patent US5360197A successfully refreshed from Google Patents.
US5360197A
Expired / Lapsed
US
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Electromagnetically operated injection valve
Assignee: Robert Bosch GmbH
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Filing: 1992-09-02
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Granted: 1994-11-01
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Expires: 2012-09-02
Abstract
Abstract An electromagnetically operated injection valve including a return spring having upper and lower ends, the upper and lower spring ends are bent to extend axially and parallel with a valve's longitudinal axis. The upper end of the spring engages a recess of a fixed setting bushing, and the lower end engage in a recess of a needle sleeve so as to prevent twisting. Due to the position of a valve seat body relative to the valve closing member the same angle is maintained throughout the life of the assembly, the adaptation process of both components is reduced to a single running-in phase. The new injection valve is particularly suitable as an injection valve for fuel injection units of mixture compressing spark ignited internal combustion engines.
Inventors
- 👤 Ferdinand Reiter
- 👤 Martin Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:04
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M61/00; F02M61/16; F02M61/20; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0682
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
An electromagnetically operated injection valve for fuel injection units of internal combustion engines, comprising a metal core extending along a valve's longitudinal axis, a magnetic coil and an armature through which a valve closing member acting in conjunction with a fixed valve seat is operated, and a cylindrical setting bushing pressed into the core which is designed concentrically with the valve's longitudinal axis, on which setting bushing a return spring is supported which engages on a needle sleeve which is connected to the valve closing member, the return spring (26) is bent at upper and lower opposite (52, 55) ends, in which arrangement the upper spring end (52) which faces the setting bush (27) engages in a recess (45) of the setting bushing (27) and the lower spring end (53) which faces the needle sleeve (51) engages in a recess (46) of the needle sleeve (51) in a form-locking manner in the circumferential direction.
Claim 2
Dependent Claim
154 words
An electromagnetically operated injection valve for fuel injection units of internal combustion engines, comprising a metal core extending along a valve's longitudinal axis, a magnetic coil and an armature through which a valve closing member acting in conjunction with a fixed valve seat is operated, and a cylindrical setting bushing pressed into the core which is designed concentrically with the valve's longitudinal axis, on which setting bushing a return spring is supported which engages on a needle sleeve which is connected to the valve closing member, the return spring (26) is bent at upper and lower opposite (52, 55) ends, in which arrangement the upper spring end (52) which faces the setting bush (27) engages in a recess (45) of the setting bushing (27) and the lower spring end (53) which faces the needle sleeve (51) engages in a recess (46) of the needle sleeve (51) in a form-locking manner in the circumferential direction.
Claim 3
Dependent Claim
38 words
An injection valve in accordance with claim 1, in which said upper and lower spring ends (52, 53) of the return spring (26) have a straight-lined longitudinal section (68) which extends parallel with the valve's longitudinal axis (11).
Claim 4
Dependent Claim
32 words
An injection valve in accordance with claim 2, in which a transverse section (69), directed into the interior of the return spring (26), follows on from upper and lower longitudinal sections (68).
Claim 5
Dependent Claim
17 words
An injection valve in accordance with claim 3, in which the transverse section (69) is arc shaped.
Claim 6
Dependent Claim
34 words
An injection valve in accordance with claim 4, in which a straight-lined longitudinal section (70) which is parallel with the valve's longitudinal axis (11), follows on from the upper and lower longitudinal section (69).
Claim 7
Dependent Claim
31 words
An injection valve in accordance with claim 1, in which the upper and lower spring ends (52, 53) are arranged in alignment with each other or offset relative to each other.
Claim 8
Dependent Claim
31 words
An injection valve in accordance with claim 2, in which the upper and lower spring ends (52, 53) are arranged in alignment with each other or offset relative to each other.
Claim 9
Dependent Claim
31 words
An injection valve in accordance with claim 3, in which the upper and lower spring ends (52, 53) are arranged in alignment with each other or offset relative to each other.
Claim 10
Dependent Claim
31 words
An injection valve in accordance with claim 4, in which the upper and lower spring ends (52, 53) are arranged in alignment with each other or offset relative to each other.
Claim 11
Dependent Claim
31 words
An injection valve in accordance with claim 5, in which the upper and lower spring ends (52, 53) are arranged in alignment with each other or offset relative to each other.
References Cited (Backward Citations)
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Cited
US4944486A
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WO1991011604A2
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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) | 1997-10-31 | 1998-05-02 | 1998-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-31 | 2002-05-02 | 2002-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-31 | 2006-05-02 | 2006-11-01 | $7700.00 | Window Closed / Lapsed |