Patent · US Expired

Composite filter set for gas flow ducts

US4080185A · kind A · utility

79Cited by

6References

1Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Joachim Richter · Karlsruhe, DE
Kurt Huber · Arbon, CH
Rolf Schneider · Burgstetten, DE
Peter Rutsch · Weinheim, DE

Key dates

Filing date	Sep 16, 1976
Grant date	Mar 21, 1978
Priority date	—
Expiry date	Sep 16, 1996

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF24F13/28
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Across the gas flow path in a duct such as for air conditioning there is placed a composite filter set comprising a plurality of filter elements and means joining said elements, each of said filter elements comprising a plurality of filter pockets and a frame holding said pockets at their open ends, and said joining means connecting the frames of adjacent filter elements in a manner to form a gas-tight seal therebetween so that flowing gas can advance only by passage through one of said filter pockets.

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