US5033716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic fuel injector
Assignee: Siemens Automotive LP
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Filing: 1989-10-10
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Granted: 1991-07-23
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Expires: 2009-10-10
Abstract
Abstract An electromagnetic fuel injector is equipped with a flat valve seat. The injector features a parallel hydraulic guidance system for the armature which is obtained by suitably disposed hydraulic damping gaps. In addition, a method of manufacturing said hydraulic damping gaps is described.
Inventors
- 👤 Gerhard Mesenich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:26
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0632; F02M51/08; F02M2200/00; F02M2200/30; F02M2200/304; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
An electromagnetic fuel injector comprising a fuel inlet, a fuel outlet, an electromagnetic coil, an armature, and a reset spring arranged to control the passage of fuel from said inlet to said outlet, wherein said armature is radially guided mechanically and has a ball-type periphery and closes the injector by impacting a valve seat disposed centrally of the coil, characterized by the face that the injector is provided with two annular concentric raised valve seats forming a groove-type fuel collection space therebetween which is in communication with several nozzles leading to the fuel outlet.
Claim 2
Dependent Claim
94 words
An electromagnetic fuel injector comprising a fuel inlet, a fuel outlet, an electromagnetic coil, an armature, and a reset spring arranged to control the passage of fuel from said inlet to said outlet, wherein said armature is radially guided mechanically and has a ball-type periphery and closes the injector by impacting a valve seat disposed centrally of the coil, characterized by the face that the injector is provided with two annular concentric raised valve seats forming a groove-type fuel collection space therebetween which is in communication with several nozzles leading to the fuel outlet.
Claim 3
Dependent Claim
29 words
An electromagnetic fuel injector according to claim 1 characterized by the fact that a diffuser is located below the valve seat and has an edge slanted to the inside.
Claim 4
Dependent Claim
23 words
An electromagnetic fuel injector according to claim 2 characterized by the fact that said slanted edge is located in alignment with said nozzles.
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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |