Secondary sealing element

US7240904B2 · kind B2 · utility

Assignee

• Burgmann Industries GmbH & Co. KG · DE

Inventors

• Peter Droscher · Geretsried, DE
• Klaus Lang · Munster, DE
• Günther Lederer · Geretsried, DE
• Josef Nosowicz · Geretsried, DE
• Andreas Schrufer · Wolfratshausen, DE
• Georg Steigenberger · Bad Windsheim, DE
• Peter Waidner · Peißenberg, DE

Key dates

• Filing date: Nov 12, 2003
• Grant date: Jul 10, 2007
• Expiry date: Dec 17, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/38
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A secondary sealing element comprises a base body (12) made of a synthetic material and comprising a base portion (13) and a seal portion (14) which each comprise coaxially aligned, axially adjacent through bores (17, 31) for the passage of a component, and an annular disc element (25) accommodated in the base portion and comprising a through bore (30) coaxially aligned with the through bores in the base and seal portions and being made of a material which differs from that of the base body. In the unloaded state, the through bore (30) of the annular disc element (25) has a radial dimension d which is greater than that D2 of the through bore (31) in the seal portion (14) and smaller than that D1 in the base portion (13) of the base body (12). The annular disc element consists of a carbon material. An important field of application for the secondary sealing element is that of mechanical face seals for sealing relatively moveable components.