Method and device for treating, especially cleaning, abrasive clearing or stripping of coatings, graffiti or other superficial soiling on parts, work pieces or surfaces

US6390898B1 · kind B1 · utility

Inventor

• Gerard Pieper · Moosburg an der Isar, DE

Key dates

• Filing date: Apr 11, 2000
• Grant date: May 21, 2002
• Expiry date: Apr 11, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/10
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method and device for treating, especially cleaning, abrasive clearing or removing of coatings (1), graffiti or other superficial soiling on parts, work pieces or surfaces (3). A blasting means (2) is gravity fed from a holding container (11) to a carrying air stream (5) which is transported inside a hose guiding system constructed with outgoing and incoming lines. The blasting means are fed through said carrying air flow by low pressure, and, in a blasting chamber (25), are blasted against the surface (3) which is to be treated through a blasting lance (22). From the blasting chamber, said blasting means are transported back to the carrying air stream (5) in such a way that the blasting means (2) are circulated. The acceleration of the blasting means is essentially generated by the low pressure applied on the blasting chamber (25) and by increasing the blasting velocity in an acceleration section (L) by reducing the diameter of the outgoing line in the acceleration section (L). The low pressure outgoing line (20) is connected to a linear acceleration tube (21) which forms an acceleration section (L). The acceleration tube which comprises a diameter reduc…