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:
Jan. 18, 2011
Filed:
Mar. 31, 2010
Hilmar Vidarsson, Munka-Ljungby, SE;
Paul Skoglund, Leberget, SE;
Sven Allroth, Höganäs, SE;
Ermin Imamovic, Höganäs, SE;
Hilmar Vidarsson, Munka-Ljungby, SE;
Paul Skoglund, Leberget, SE;
Sven Allroth, Höganäs, SE;
Ermin Imamovic, Höganäs, SE;
Höganäs AB, Höganäs, SE;
Abstract
A specifically defined powder composition is provided wherein there is a requirement that the specified lubricant always be liquid at room temperature. Such powder composition contains coarse iron or iron-based powder having an average particle size between 75 and 300 μm wherein less than 10% of the powder particles have a size below 45 μm and the amount of particles above 212 μm is above 20%, and as a lubricant at least one non-drying oil or a vegetable or animal based fatty acid having a crystalline melting point below 25° C., and a viscosity (η) at 40° C. above 15 mPas, wherein said viscosity is temperature dependent according to the following formula:10 log η=wherein k is the slope, T is the temperature in degrees Kelvin, and C is a constant, in an amount between 0.04 and 0.4% by weight of the composition and optional additives. The slope preferably is above 800.