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:
Nov. 22, 2011
Filed:
Aug. 01, 2008
Applicants:
Daniel E. Barber, Fuquay-Varina, NC (US);
Donald A. Nixon, Wilson, NC (US);
Inventors:
Daniel E. Barber, Fuquay-Varina, NC (US);
Donald A. Nixon, Wilson, NC (US);
Assignee:
Lord Corporation, Cary, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
A magnetorheological fluid comprising magnetic-responsive particles, a thickener, an ionic thixotropic additive, and a carrier fluid wherein the carrier fluid comprises a glycol-water mixture comprising at least 50 percent by weight of a glycol compound. The thickener is preferably fumed silica and the ionic thixotropic additive is preferably one of sodium nitrite, sodium chloride, sodium acetate, and sodium benzoate.