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:
Mar. 24, 2026
Filed:
Sep. 24, 2020
Danfoss A/s, Nordborg, DK;
Georg Enevoldsen, Nordborg, DK;
Stig Kildegaard Andersen, Krusaa, DK;
Frank Holm Iversen, Padborg, DK;
DANFOSS A/S, Nordborg, DK;
Abstract
A method for producing a water-hydraulic machine having a first member () and a second member () in sliding contact with a contact surface () of the first member (), wherein the second member () comprises a surface made of a friction reducing plastic material and the contact surface () is a metallic surface, is disclosed. The machine should have a low risk of damages. To this end, the method includes the steps of using a first member () comprising a first part () having the contact surface () and a second part (), using a high temperature hardening process at a temperature of at least 1000° C. to give a deep surface hardening of the contact surface () of the first part (), machining of the first part () to the desired geometry, assembling the first part () and the second part () to form the first member.