Air restraint device for burnishing machine
US4742652A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 20, 1987 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Apr 20, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L11/4077
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A high speed floor burnishing machine in which fine particles generated by the burnishing action are confined, having a burnishing disc which is completely enclosed in a housing. The housing has a peripheral domed flange terminating in a sponge rubber skirt in contact with the floor, and is mounted to float in response to unevenness in the floor level. The weight of the housing compresses the skirt to the extent of 0.19 to 0.25 pounds per linear inch of skirt circumference to seal the enclosure. In one form of the invention the housing floats on a pair of sleeves surrounding bolts screwed into the base of the machine. In another form the housing is suspended from a flexible diaphragm surrounding the drive shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.