公开(公告)号：EP1139849A1

公开(公告)日：2001-10-10

申请号：EP99950110.9

申请日：1999-10-01

申请人： NLB Corp.

发明人： SHOOK, Forrest, A. ,  HERHOLD, Matthew, O.

IPC分类号： A47L11/03

CPC分类号： A47L11/4044 ,  A47L11/03 ,  A47L11/38 ,  A47L11/4088

摘要： An improved system (22) for cleaning vertical walls includes a vacuum source (28) to adhere the system (22) to the wall, and removes fluid and removed material therefrom. A rotating fluid jet is positioned radially inwardly of the vacuum source (28) and impinges high pressurized fluid on the wall surface. In a preferred embodiment, a central portion (26) mounts the fluid source (38) and the vacuum source (28). A base portion (24) mounts motors (40) for driving the system (22) along the wall. The base portion (24) rotates relative to the central portion (26) such that the central portion (26) does not move as the base portion (24) turns on the wall to drive the system (22) along the wall. An additional air flow system can be provided to provide supplemental air flow to help move fluid material. In a second embodiment, a seal (190) for contacting the surface to be cleaned includes a plurality of brush bristles (154). The brush bristles (154) ensure good contact with the wall.