Patent · US Active

Ventilation duct

US9618144B2 · kind B2 · utility

2Cited by

20References

14Claims

0Family size

Assignee

CLIMATE RECOVERY IND AB · SE

Inventors

Peter Wallin · Kalmar, SE
Göran Bernhardsson · Stockholm, SE

Key dates

Filing date	Sep 20, 2012
Grant date	Apr 11, 2017
Priority date	—
Expiry date	Feb 1, 2033

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF24F13/0272
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A duct includes a number of wall sections which are at least partly produced from fiber material and a binder agent. Together, the wall sections define a closed, elongate flow space. The wall sections which meet one another are united by the intermediary of at least one longitudinal fold or joint line. In the fiber material and the binder agent of the duct, there are disposed longitudinal rigidifying elements. On the outside of the duct, there are longitudinal bead-liked projections which include the fiber material and the binder agent.

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