Pre-seal for magnetic liquid seal for an anti-friction bearing

US4984908A · kind A · utility

Assignee

• Fag Kugelfischer Georg Shäfer AG · DE

Inventors

• Alban Kronenberger · Bopfingen, DE
• Oswald Bayer · Aidhausen, DE

Key dates

• Filing date: Apr 5, 1990
• Grant date: Jan 15, 1991
• Expiry date: Apr 5, 2010

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C19/06
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A magnetic liquid seal for an anti-friction bearing, the seal comprising an annular magnet and annular pole rings with respective supplies of magnetizable liquid radially between the pole rings and the inner ring. A pre-seal element with a lip extending toward the inner ring is supported on that axial side of the magnet that is toward the rolling element balls. A notch is defined in the inner race radially generally centered beneath the lip. The opposite axial side surfaces of the notch are obliquely outwardly inclined in the radially outward direction.