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:
Aug. 08, 2006
Filed:
Oct. 22, 2003
Ulrich Buettner, Senden, DE;
Hans-juergen Fuesser, Gerstetten, DE;
Volker Lagemann, Ulm, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
The invention relates to the surfaces of the polygon () and/or the plunger foot plate () of a high-pressure pump for a diesel motor, at least one of the surfaces having cavities at least in the contact area between the polygon () and the plunger foot plate (). According to the invention the face of the plunger foot plate () lying opposite the polygon () is concave, at least in the load-free state and the cavities have a depth of between 5 and 50 μm, a width of between 30 and 100 μm and a length of at least 100 μm, or a diameter ranging between 30 and 100 μm. The edges of the cavities are rounded. The invention also relates to a method for producing said surfaces, according to which the cavities are first created in the surface by means of chemical etching, blasting using blasting agents or by means of a laser removal process, the surface is subsequently polished in a vibratory grinding process and the edges of the cavities are rounded.