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. 22, 1986
Filed:
Mar. 29, 1984
Elmar Breitbach, Gottingen, DE;
Abstract
A spring-system, used for the suspension of motor-vehicles, comprises a manical, pneumatic, or hydro-pneumatic suspension-spring inserted between the sprung and the unsprung masses of the motor-vehicle. The suspension-spring is linear and possesses relatively high positive rigidity with only short spring-travel. Arranged in parallel with the suspension-spring is a correcting spring having negative rigidity and zero-crossover in the region of negative rigidity. The correcting spring comprises two parts each equipped with permanent magnets, one of these parts being connected to the sprung mass and the other to the unsprung mass. Each of the parts of the correcting spring comprises a plurality of permanent magnets arranged one behind the other in the direction of movement, with pieces of soft iron arranged therebetween, like poles of adjacent permanent magnets adjoining the soft-iron intermediate pieces, and the magnetizing axes of the permanent magnets being arranged in parallel with the direction of movement. The arrangement is such that the magnetic flux, deflected by the soft-iron intermediate pieces perpendicularly to the direction of movement, produces, in both parts, like poles facing each other and repelling each other in unstable equilibrium at the same height in relation to the direction of movement.