Spray head for a blower tube of a spray apparatus

US8672238B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Marcus Stein · Dresden, DE
• Markus Herzog · Ergolding, DE
• Christine Bähr · Großenhain, DE

Key dates

• Filing date: May 5, 2010
• Grant date: Mar 18, 2014
• Expiry date: Mar 21, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05B7/2475
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A spray head is provided for a blower tube of a spray apparatus. The blower tube is adapted to conduct a blower air flow to the spray head (20) in a flow direction (18). The spray head includes a supply pipe (13) for a medium to be sprayed such as a liquid. The spray head also includes an inlet opening for receiving the blower air flow (40) and an outlet opening through which the blower air flow is discharged from the spray head enriched with the medium. The supply pipe (13) has an outer feed connection for the medium and a discharge opening (29) in the interior of the spray head for admixing the medium into the blower air flow (40). The discharge opening (29) defines a plane aligned in the flow direction (18) and an impediment is disposed at the edge of the discharge opening lying upstream with respect to the flow direction (18). The impediment disturbs the blower air flow entering the spray head through the inlet opening before it flows over the discharge opening. In this way, noise excitation is avoided while obtaining a good atomization of the medium.