Apparatus for applying mastic to a selected surface
US5535926A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1994 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | Jul 6, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C17/002
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus for applying mastic to a selected surface includes a container for mastic, a pump assembly, and a drywall tool or wand. The pump assembly is positioned in the container so that it draws mastic from the container and delivers it to the drywall tool. The mastic delivered to the drywall tool is applied to the selected surface through a nozzle in the drywall tool. The pump assembly includes a pump, a pneumatic cylinder, and a linking subassembly connecting the pump and the pneumatic cylinder. The pump assembly is operated by an air compressor. The air compressor causes a rod in the pneumatic cylinder to reciprocate. The linking subassembly translates this reciprocation to a piston in the pump assembly. The piston reciprocates within a bore of the pump assembly and draws the mastic from the container. The apparatus is mounted on a hand truck so that it may be moved to different locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.