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:
Apr. 02, 2002
Filed:
Nov. 05, 1998
Bengt-Allan Bergvall, Huskvarna, SE;
Ulf Petersson, Tollered, SE;
Aktiebolaget Electrolux, Stockholm, SE;
Abstract
A solenoid ( ) comprising at least two stationary coils ( ), which are located axially beside each other and are current supplied at the same time, and at least one magnetically active element ( ), such as a permanent magnet or a soft iron part. The solenoid contains one inner and one outer magnetically active element ( ), of which at least one is composed of an essentially axially magnetized permanent magnet ( ). The coils are located between the elements ( ), so that they surround the inner element ( ), and are arranged with mutually different current direction, and the coils and the elements ( ) are arranged around an essentially mutual axis center line ( ), so that a magnetic field is obtained between the elements ( ) and this crosses the current supplied coils' ( ) wire essentially perpendicularly and gives rise to an axial power action between the coils and the elements, and at least one of the elements is axially movable.