Cassette seal for use in extreme environments

US11592110B2 · kind B2 · utility

Assignee

• AKTIEBOLAGET SKF · SE

Inventors

• Gregory G. Gildea · Park City, US
• Marco Erminio Panchetti · Torino, IT
• Alex Paykin · Skokie, US
• Thomas Schwarz · Leoben, AT
• Hans-Joachim vom Stein · Leverkusen, DE

Key dates

• Filing date: Aug 30, 2021
• Grant date: Feb 28, 2023
• Expiry date: Oct 6, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/54
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A seal assembly includes an outer annular case disposed within and coupled with a rotatable outer member to be angularly displace about a central axis. An annular flexible seal is disposed within and coupled with the case to angularly displace about the central axis when the outer member rotates about the axis. The flexible seal has elastomeric sealing lip(s) engageable with an outer circumferential surface of the shaft or of a sleeve disposed about the shaft. An annular inner rigid seal is disposed within the outer case and has an inner end coupled with the shaft or the sleeve, the flexible seal being radially displaceable with respect to the inner rigid seal. An outer annular rigid seal is disposed about the inner seal and has an inner end sealing against the inner rigid seal. A biasing member biases the outer rigid seal against the inner rigid seal.