Patent · US Expired

Hydraulically dynamic mono-pig scraper

US7213290B2 · kind B2 · utility

5Cited by

0References

13Claims

0Family size

Assignee

Durr Systems, Inc. · US

Inventors

Herbert Martin · Waiblingen, DE
Werner Schwager · Ludwigsburg, DE
Martin Stiegler · Uhingen, DE
Andreas Collmer · Leinfelden, DE
Manfred Michelfelder · Höpfigheim, DE

Key dates

Filing date	May 15, 2006
Grant date	May 8, 2007
Priority date	—
Expiry date	May 20, 2026

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16L2101/40
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention concerns a pig scraper for cleaning the inside wall of a coating agent conduit. The pig scraper includes a body insertable in the conduit and at least one sealing lip that seals against the inside wall of the conduit and extends parallel to a longitudinal axis of the body. A space is defined between the sealing lip and the body to form a pocket for enhancing the sealing of the sealing lip with respect to the conduit. The length of the sealing lip substantially prevents the lip from folding over on itself in response to a change in the direction of movement of the pig scraper in the conduit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.