Dental furnace with metallic inner housing, plastic outer housing, and air space therebetween

US5266777A · kind A · utility

Assignee

• HERAEUS KULZER GMBH · DE

Inventors

• Steffen Oppawsky · Bad Homburg vor der Höhe, DE
• Peter Gernhard · Friedrichsdorf, DE

Key dates

• Filing date: Feb 20, 1992
• Grant date: Nov 30, 1993
• Expiry date: Feb 20, 2012

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C13/20
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A dental furnace for heat treatment of dental materials and dental components, particularly for firing these at temperatures over 100.degree. C. comprises an insulated furnace space which can be closed off by a door. The furnace space has a housing which is suspended in an inner housing of metal; the inner housing is supported by a multi-part outer housing, and the door is pivotably fastened on the inner housing. In order to satisfy the requirements of firing at up to 400.degree. C., and to achieve a simple, cost-effective, and light construction, the furnance of the invention has a plastic outer housing, connected by securing elements to the inner housing; the plastic elements have a shell-shaped configuration, so that they define a hollow space surrounding the inner housing, at least adjacent the sidewalls of the outer housing. The hollow space serves as an insulator, minimizing the need for other insulating materials.