Pipe seal with a sheet-metal casing bendable around a pipe

US5876042A · kind A · utility

Assignee

• Gruenau Illertissen GmbH · DE

Inventors

• Robert Graf · Babenhausen, DE
• Dieter Annemaier · Illerkirchberg, DE

Key dates

• Filing date: Nov 3, 1997
• Grant date: Mar 2, 1999
• Expiry date: Nov 3, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S277/936
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A device for sealing the gap or void between the outer circumference of a pipe and a hole in a wall the pipe passes through includes a sheet metal casing flexible enough to be bent around the pipe. The inside wall of the casing includes spaced apart inner directed radial projections for containing a swelling agent that is heat activated for filling the void between the housing and pipe in a manner overlapping the gap between the pipe and the wall.