US4426988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control element
Assignee: Robert Bosch GmbH
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Filing: 1982-08-25
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Granted: 1984-01-24
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Expires: 2002-08-25
Abstract
Abstract A control device with an electric servo motor is proposed, by means of which a throttle device can be operated, which opens, to a greater or lesser degree, the passage diameter of a flow line, especially the passage diameter of a by-pass line around a throttle valve disposed in the intake line of an internal combustion engine. The control device has an elastic element which moves the throttle device, during an interruption of the current supply to the electric servo motor into a defined position opening the passage diameter of the flow line.
Inventors
- 👤 Max Greiner
- 👤 Gerold Grimm
- 👤 Heinrich Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:58
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/06; F02M3/07; F02M2003/067
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A control device including an electric servo motor controlled by a current supply, said control device further including a throttle device which opens, to a greater or lesser degree a passage diameter of a by-pass flow line around a throttle valve disposed in an intake line of an internal combustion engine, wherein said control device has at least one elastic element secured therebo by means of which, during an interruption of said current supply of said electric servo motor, said throttle device can be moved by said at least one elastic element into a defined position thereby opening said passage diameter of said flow line.
Claim 2
Dependent Claim
105 words
A control device including an electric servo motor controlled by a current supply, said control device further including a throttle device which opens, to a greater or lesser degree a passage diameter of a by-pass flow line around a throttle valve disposed in an intake line of an internal combustion engine, wherein said control device has at least one elastic element secured therebo by means of which, during an interruption of said current supply of said electric servo motor, said throttle device can be moved by said at least one elastic element into a defined position thereby opening said passage diameter of said flow line.
Claim 3
Dependent Claim
32 words
A control device in accordance with claim 1, characterized in that said throttle device is pivotably arranged in said flow line and in that a coil spring serves as said elastic element.
Claim 4
Dependent Claim
54 words
A control device in accordance with claim 2, characterized in that said throttle device, during an interruption of said current supply of said electric servo motor can be moved by said elastic element into a position in which said passage diameter of said flow line is opened to about a quarter to a half.
Claim 5
Dependent Claim
54 words
A control device in accordance with claim 1, characterized in that said throttle device, during an interruption of said current supply of said electric servo motor can be moved by said elastic element into a position in which said passage diameter of said flow line is opened to about a quarter to a half.
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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |