Apparatus for applying liquid coatings
US4540301A · kind A · utility
Inventors
Key dates
| Filing date | Dec 16, 1983 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Dec 16, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C21/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A peristaltic-type pump having an intake which may be conveniently connected to a liquid coating source includes an impeller having a pair of rollers. Rotation of the impeller causes the rollers to progressively compress a length of tubing in the pump. This compression creates suction to draw the coating material into the pump and pressure to drive a flow of coating to a handle attached to an applicator. The handle includes flow control devices which may be selectively operated to supply coating to the applicator only as required. During periods of non-flow the coating pressure is sensed to deactivate the pump when the pressure exceeds a preselected limit. Deactivation of the pump saves energy and prolongs a life of the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.