Patent · US Expired

Plasma spray gun for internal coatings

US4661682A · kind A · utility

56Cited by

4References

11Claims

0Family size

Assignee

Plasmainvent AG · CH

Inventors

Heiko Gruner · Stuttgart, DE
Markus Müller · Männedorf, CH

Key dates

Filing date	Aug 15, 1985
Grant date	Apr 28, 1987
Priority date	—
Expiry date	Aug 15, 2005

Classification

Technology area (CPC H)Electricity
CPC primaryH05H1/3478
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

In a plasma spray gun (1) including a cooled electrode (10) and burner nozzle (12) for insertion in pipes and bores of work pieces and for coating the inner surfaces of these work pieces, for the coating of bores with a minimal diameter of 25 mm the electrode (10) is designed rotation-asymmetrically in the area of its head (15), and the diameter of the electrode (10) is smaller than the minimal inner diameter of the burner nozzle (12), while the burner nozzle (12) on the end facing away from the electrode (10) has at least one partial area (17) with an inner diameter which is larger than its minimal inner diameter, and the powder injector (13) has a flat exit cross-section.

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