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:
Jul. 08, 1997
Filed:
Dec. 20, 1995
Applicant:
Inventors:
Keith D Weiss, Eden Prairie, MN (US);
Donald A Nixon, Wilson, NC (US);
J David Carlson, Cary, NC (US);
Anthony J Margida, Apex, NC (US);
Assignee:
Lord Corporation, Cary, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
252 6254 ; 252 6252 ; 252 6253 ; 252 6255 ; 252 6256 ; 252500 ; 252512 ; 252513 ; 252518 ; 252519 ; 252520 ; 252503 ; 252507 ; 252508 ;
Abstract
A magnetorheological material containing a carrier fluid, a particle component and a thixotropic additive to provide stability against particle settling. The thixotropic additive can be a hydrogen-bonding thixotropic agent, a polymer-modified metal oxide, or a mixture thereof. The utilization of a thixotropic additive creates a thixotropic network which is unusually effective at minimizing particle settling in a magnetorheological material.