Battery powered, riding, floor burnishing machine
US6530821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2001 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | May 7, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L11/4061
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A riding burnishing machine (10) includes a battery pack positioned as low as possible in the chassis (12) between the front and rear wheels (14, 15) and removable in a horizontal movement direction while supported by the bottom by a pallet jack. A steering system includes steering shafts (58, 76) which are rotatable together while allowing relative pivotable movement therebetween and which are rotatably connected to the spindle (38) of the steerable rear wheels (15) through a jack shaft (44). The burnishing head is raised and lowered relative to the floor surface by an electric actuator (104) which pivots a linkage (92) through a connection allowing floating travel. The pressure which the treating member (16) engages the floor surface is controlled in response to the current level of the electric motor (86) which rotates the treating member (16). The current level of the electric motor (86) is measured by monitoring the voltage at the ends of a negative supply lead cable (144) and the temperature of the cable (144).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.