Radial shaft seal

US11603933B2 · kind B2 · utility

Assignee

• KACO GmbH + Co. KG · DE

Inventors

• Wilhelm Wunder · Ilsfeld, DE
• Konstantin Rempel · Heilbronn, DE

Key dates

• Filing date: Apr 15, 2020
• Grant date: Mar 14, 2023
• Expiry date: Sep 29, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/3268
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A radial shaft seal for a shaft to be sealed operating at high rotational speeds and circumferential speeds in both rotational directions has a sealing lip with a first circumferential ring and a second circumferential ring. The first circumferential ring is resting seal-tightly against the shaft to be sealed and seals the medium side. At the side of the first circumferential ring facing the air side, there are first return elements that convey leakage medium back to the medium side. The second circumferential ring is provided at the side of the first circumferential ring facing the air side and second return elements are provided at its air side. The second return elements guide medium that has passed underneath the second circumferential ring back underneath the second circumferential ring to the medium side.