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US 8,136,554 B2Granted
Molded plastic pipe
AssigneeRobert Bosch GmbH
InventorDieter Junger
Life of this patent
Estimating the term…
Abstract
The invention relates to a plastic molded pipe, in particular for fuel-conducting return lines in injection systems for internal combustion engines. The plastic molded pipe has an inner pipe and an outer encapsulation made of a plastic material with connectors for additional components of the fuel injection system. The inner pipe is embodied as a plastic inner pipe with at least one bend.
Claims8
A molded plastic pipe for fuel-carrying return lines in injection systems for internal combustion engines, comprising:
- an inner pipe;
- an outer coating disposed on the inner pipe, the outer coating made of plastic material;
- and
- connections on the outer coating for further components of a fuel injection system,
- wherein the inner pipe is embodied as an inner plastic pipe with at least one pre-bent portion,
- wherein said inner plastic pipe is made from a plastic having low-temperature flexibility and said outer coating is made from a different plastic which, even at high engine compartment temperatures, has good dimensional stability and strength properties,
- wherein the outer coating has an integrally formed-on flange, a freely accessible tubular connection piece that is integrally injected, and at least one recess immediately adjacent the flange for receiving a sealing element, and
- wherein the inner plastic pipe, including an end edge thereof, is entirely surrounded by the plastic material of the outer coating.
5 more elements
Dependencies are inferred from the claim text.