Airless sprayer with hardened cylinder
US7347136B2 · kind B2 · utility
8Cited by
115References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2005 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Jan 24, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4927
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An airless sprayer for paint or the like consists of an electric drive unit connected to a piston. Driven by the electric drive unit, the piston reciprocates within the cylinder, thus spraying the paint or the like. Because of the close tolerance between the piston and cylinder (typically about 0.0002 to about 0.0003 inches), the sprayed liquid provides a seal between the piston and cylinder. To prevent this tolerance from increasing to the point of failure, the cylinder is manufactured from nitride hardened steel. A process for manufacturing the airless sprayer is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.