Scabbler for scabbling floors contaminated with hazardous materials
US4940289A · kind A · utility
Inventors
Key dates
| Filing date | Jun 1, 1988 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jun 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4578
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A manually steerable machine for scabbling areas which are relatively inaccessible to larger machines is disclosed. Three pneumatically operable piston and cylinder assemblies with bits are mounted on a plate which is mounted in vertically movable relationship on a frame, the assemblies being disposed at the apices of a triangle, one of the apices being at the forward end of the frame and the other apices being rearwardly of the one of the apices. A tiltable handle extends from the rear end of the frame and upwardly from the frame and includes an air manifold and an air valve for supplying compressed air to the assemblies through hoses. A pair of wheels at the rear of the frame support the frame when the pistons are not operating. A skid plate is attached to the bottom of the frame, and the bits are encircled by a flexible skirt extending downwardly from the frame. A vacuum hose connector has its lower end at the bottom of the frame and between the bits to collect dust.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.