The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1984
Filed:
Jul. 15, 1982
Helmut Fiedler, Glen-Ellyn, IL (US);
Ernst Ritter, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
There is proposed an improved fuel injection pump which will prevent erosion at the pump housing caused by the fuel stream leaving the return flow openings at the end of injection, by providing an impact protection ring on the cylinder bushing. Guide faces on the ring inclined toward the center (M) thereof are molded into the impact protection ring in the vicinity of a cylindrical wall portion. The impact protection ring rests on an abutment shoulder disposed above the return flow openings, in the vicinity of the return flow openings encloses an annular chamber, and is pressed by a snap ring without play and with a defined prestressing force against the abutment shoulder. As a result of the guiding action of the guide faces on the impact protection ring, a rotational movement of the impact protection ring triggered by the obliquely exiting fuel stream is assured, in order to attain a long service life for the pump.