Method of scraping corners

US4256510A · kind A · utility

Inventors

• David Thompson · San Jose, US
• Walter R. G. Haggstrom · Portsmouth, US

Key dates

• Filing date: Aug 11, 1978
• Grant date: Mar 17, 1981
• Expiry date: Aug 11, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B08B1/165
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A drum-type rotary scraper, for use in a corner, scraping a surface by the snapping reformation of elastically restrained portions of flexible fingers deformed from their normal circular path by the constraint of the planes forming the corner. By way of an example, a cylindrical bird-cage broom whose tips rotate bluntly and ineffectively against a first plane surface while the drum surface of the fingers immediately adjacent the tip ends, in deforming and scraping on the second and snapping onto the third of surfaces defined by the intersection of three planes at right angles, removes paint from two of these relatively inaccessible surfaces.