Pressure washer gun with chemical injection and foaming capabilities
US9901943B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | May 31, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B1/1654
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pressure washer spray gun includes a spray gun body configured to be fluidly coupled to a source of pressurized water, a chemical container coupled to the spray gun body, wherein the chemical container is configured to contain liquid chemical, a venturi including a converging section, a throat, and a diverging section, wherein the venturi is coupled to the body, and wherein the chemical container is fluidly coupled to the throat, an air inlet port formed in the diverging section and configured to fluidly couple the diverging section to a source of air, and multiple nozzles, wherein each nozzle has a different orifice diameter, and wherein only one nozzle at a time can be selected to provide a fluid output from the spray gun.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.