Shaft seal

US5139275A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Peter Ehrmann · Hemsbach, DE
• Rolf Vogt · Oftersheim, DE
• Gerhard Kilthau · Mannheim, DE

Key dates

• Filing date: Sep 6, 1989
• Grant date: Aug 18, 1992
• Expiry date: Sep 6, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/324
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A shaft seal including a reinforcement ring 1 with a lip ring 2 made of a polymeric material which is connected thereto and which is provided with a cylindrical surface 4 surrounding a shaft 3 at a certain distance and with projecting retaining bodies having flow bounding surfaces disposed in radial direction of the aforesaid cylindrical surface, and the aforesaid flow bounding surfaces are associated with the longitudinal direction of the shaft at an acute angle. The free spaces 6 which are enclosed by the cylindrical surface 4, the shaft 3, and the retaining bodies 5 during non-rotation or standstill of the shaft are of capillary-active narrowness and axially completely open in direction toward the space to be sealed as well as in the opposite direction.