US4246880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for heating the intake pipe of a spark-ignited internal combustion engine
Assignee: Pierburg GmbH
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Filing: 1979-08-21
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Granted: 1981-01-27
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Expires: 1999-08-21
Abstract
Abstract An arrangement for heating the intake pipe of a spark-ignited internal combustion engine with electrical heating elements having a positive temperature coefficient. These heating elements are located on a heating plate which forms part of the intake pipe wall, and are held by a carrier member, rigidly fastened to these elements. This carrier member has several elastic plates, one for each heating element, connected to one central current contact surface. The carrier member is centered in the heating plate and is loaded by a compression spring which is centered in the cover of the housing of the arrangement.
Inventors
- 👤 Ulrich Henke
- 👤 Wojciech Marusiak
- 👤 Hermann Baumler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:29
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/12; F02M31/135; F01; F01M; F01M13/00; F01M13/0011; F01M2013/0027; F01M13/04; F01M2013/0455; F01M2013/0472; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
In an intake pipe of a spark-ignited internal combustion engine wherein the improvement comprises an arrangement for heat including: electrical heating elements with a positive temperature coefficient; a housing having a heating plate; said positive temperature coefficient heating elements being located on said heating plate, said heating plate forming part of a wall of said intake pipe; a carrier member rigidly connected to said heating elements; said carrier member having a plurality of elastic plates, one of said plates being for each of said heating elements, said plates being connected to one central current contact surface, said carrier member being centered in said heating plate; a housing cover; and a compression spring loading said carrier member and centered in said housing cover.
Claim 2
Dependent Claim
122 words
In an intake pipe of a spark-ignited internal combustion engine wherein the improvement comprises an arrangement for heat including: electrical heating elements with a positive temperature coefficient; a housing having a heating plate; said positive temperature coefficient heating elements being located on said heating plate, said heating plate forming part of a wall of said intake pipe; a carrier member rigidly connected to said heating elements; said carrier member having a plurality of elastic plates, one of said plates being for each of said heating elements, said plates being connected to one central current contact surface, said carrier member being centered in said heating plate; a housing cover; and a compression spring loading said carrier member and centered in said housing cover.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |