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. 13, 2007
Filed:
May. 28, 2003
Applicants:
Ove Thorbøl Hansen, Nordborg, DK;
Palle Olsen, Nordborg, DK;
Lars Martensen, Sønderborg, DK;
Erik Haugaard, Graasten, DK;
Inventors:
Ove Thorbøl Hansen, Nordborg, DK;
Palle Olsen, Nordborg, DK;
Lars Martensen, Sønderborg, DK;
Erik Haugaard, Graasten, DK;
Assignee:
Danfoss A/S, Nordborg, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01B 3/02 (2006.01); F04B 1/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention concerns a water-hydraulic machine with at least two mutually movable parts, of which one has a surface of a plastic material with friction-reducing properties. In such a machine it is desired to enable the use of demineralised water. For this purpose, it is ensured that a layer of a carbon-containing material is arranged between the plastics material and the other part.