EP 0910981 A1 19990428 - Brush head positioning system
Title (en)
Brush head positioning system
Title (de)
Bürstenkopfpositioniervorrichtung
Title (fr)
Système de positionnement d'un support de brosse
Publication
Application
Priority
US 6271097 P 19971022
Abstract (en)
An apparatus for use on a surface (8;108;210) and responsive to an operator. A head assembly (4;104;204) is adapted to carry a brush (6;106;208) for engaging and treating the surface (8;108;210) of a floor. An actuator (12;112,142,144,146,212) raises and lowers the head assembly (4;104;204) relative to the surface (8;108;210) thereby controlling the relative engagement between the brush (6;106;208) and the surface (8;108;210) and thereby controlling the treatment of the surface (8;108;210) by the brush (6;106;208). A touchdown switch (120;178) detects a position of the head assembly (4;104;204) such as when the brush (6;106;208) contacts the floor (8;108;210). A driving circuit (10;110;218) energizes the actuator (12;112,142,144,146;212) to raise or lower the head assembly (4;104;204) and brush (6;106;208) in response to a head position control (18;118;216) set by the operator. Alternatively, the driving circuit (10;110;218) may raise or lower the brush (6;106;208) an additional preset amount after the touchdown switch (120;178) detects that the brush (6;106;208) has touched the floor (8;108;210), the additional preset amount being defined by input from the operator. Torque and/or pressure control in combination with stroke control are also described. <IMAGE>
IPC 1-7
IPC 8 full level
A47L 11/40 (2006.01)
CPC (source: EP)
A47L 11/4011 (2013.01); A47L 11/4058 (2013.01)
Citation (search report)
- [XAY] US 5673450 A 19971007 - BRISCOE WILLIAM ANTHONY [GB]
- [Y] EP 0301437 A2 19890201 - TENNANT CO [US]
- [A] US 4910824 A 19900327 - NAGAYAMA EIJI [JP], et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98308714 A 19981022