US5186151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for stepping up or transmitting forces and strokes
Assignee: Mercedes Benz Group AG
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Filing: 1992-06-15
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Granted: 1993-02-16
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Expires: 2012-06-15
Abstract
Abstract A device works according to the displacement principle, i.e., at least two displacers are provided in a common displacer working chamber or in displacer working chambers communicating with one another, and are drivingly coupled together by a pressure transmission medium. Elastomer material is disposed as the pressure transmission medium, at least in the region of one displacer.
Inventors
- 👤 Paul Schwerdt
- 👤 Dieter Dorrie
- 👤 Karl Kirschenhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:00
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/167; F02M57/00; F02M57/02; F02M59/00; F02M59/20; F02M59/36; F02M59/366; F02M59/44; F02M59/46; F02M59/466; F02M59/468; F15; F15B; F15B21/00; F15B21/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
198 words
A device employing a displacement principle for stepping up or transmitting at least one of forces and strokes in conjunction with a fuel injection system of an internal combustion engine in which the fuel injection system includes a control valve having a valve member, comprising a piezoelectric element, a displacer on an input side actuatable by the piezoelectric element and having a first cross-section of one amount, a displacer on the output side having a cross-section smaller than the first cross-section, and a displacer working chamber common to the two displacers and filled with a pressure transmission medium formed, at least in the region of one displacer, by an elastomer sealingly closing a side on which said displacer is situated in relation to a side on which the other displacer is situated, wherein the displacer on the output side is drivingly coupled to the valve member of the control valve in the fuel injection system, and the elastomer disposed on the displacer on the output side constitutes a leakproof barrier between a pipe system carrying fuel on the side of the output-side displacer of the elastomer and the piezoelectric element, and fastens the displacer on the output side.
Claim 2
Independent Claim
198 words
A device employing a displacement principle for stepping up or transmitting at least one of forces and strokes in conjunction with a fuel injection system of an internal combustion engine in which the fuel injection system includes a control valve having a valve member, comprising a piezoelectric element, a displacer on an input side actuatable by the piezoelectric element and having a first cross-section of one amount, a displacer on the output side having a cross-section smaller than the first cross-section, and a displacer working chamber common to the two displacers and filled with a pressure transmission medium formed, at least in the region of one displacer, by an elastomer sealingly closing a side on which said displacer is situated in relation to a side on which the other displacer is situated, wherein the displacer on the output side is drivingly coupled to the valve member of the control valve in the fuel injection system, and the elastomer disposed on the displacer on the output side constitutes a leakproof barrier between a pipe system carrying fuel on the side of the output-side displacer of the elastomer and the piezoelectric element, and fastens the displacer on the output side.
Claim 3
Dependent Claim
86 words
The device according to claim 1, wherein the piezoelectric element actuates a piston, a compression spring is clamped between said piston and the elastomer or a part supported thereon, and a first space, filled with hydraulic oil, between said and one of the elastomer and the part supported thereon is connected to a second space disposed in the piston, on one hand, via a nonreturn valve to permit flow only from the second space the first space and, on the other hand, via a throttle path.
Claim 4
Dependent Claim
19 words
The device according to claim 2, wherein the first space is disposed directly between the piston and the elastomer.
References Cited (Backward Citations)
US2421810A
Cited
US2457739A
Cited
DE1013139B
Cited
US3529165A
Cited
US4624233A
Cited
US4838232A
Cited
US4660523A
Cited
DE3600140A1
Cited
US4753212A
Cited
US4838233A
Cited
US4782807A
Cited
US4898434A
Cited
DE3742241A1
Cited
US4794890A
Cited
DE3916539A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-16 | 1996-08-17 | 1997-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-16 | 2000-08-17 | 2001-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-16 | 2004-08-17 | 2005-02-16 | $7700.00 | Window Closed / Lapsed |