SPRAY NOZZLE

• US 3,618,857 A
• Filed: 04/30/1969
• Issued: 11/09/1971
• Est. Priority Date: 05/08/1968
• Status: Expired due to Term

• Current Assignee: Johannes Hendrik Rautenbach, Maitland Reed
• Original Assignee: Johannes Hendrik Rautenbach, Maitland Reed
• Inventors: Rautenbach, Johannes Hendrik, Reed, Maitland
• Primary Examiner(s): Wood, Jr., M. Henson
• Assistant Examiner(s): Mar, Michael I.
• Application Number:
  US04/820,544
• Time in Patent Office: 923 Days
• Field of Search: 239/11,171,456,457,451,569,570,571,581,582 244/137 134/166C 60/39.74S
• US Class Current: 239/1
• CPC Class Codes: B64D 1/16 Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting jettisoning fuel B64D37/26

Abstract

A spray nozzle the body of which is provided with a circumferential spray orifice. The orifice is defined by faces on two pieces which are adjustable relatively to one another so that the width of the orifice can be varied. The body is formed by rotating an aerofoil section about a chord of the section and the orifice is positioned so that spray fluid is directed in a dishformation towards the end of the body which, in aerial spraying, is the leading end. If the nozzle is used in a stationary condition, then an airstream is caused to flow over the body from said leading end. A one-way valve is provided which is adapted to be opened by the pressure of the spray liquid fed to the nozzle.

Claims

1. A nozzle comprising an elongated body of a streamlined form having a front end and a rear end, an inlet for feeding spray liquid to the interior of the nozzle, and a circumferential spray orifice positioned intermediate said ends and defined between two facing surfaces of the body, each of said surfaces being generally frustoconical in form with the outer periphery of each surface closer to said front end than its inner periphery, and said inlet being forward of said orifice.

2. A nozzle as claimed in claim 1, wherein said surfaces diverge slightly towards said front end.

3. A nozzle according to claim 2, wherein the angle between each of said faces and the axis along which the body is elongated is approximately 60*.

4. A method of spraying which comprises feeding spray liquid to the interior of a nozzle having an elongated body of streamlined form, the body having a front end and rear end, feeding the spray liquid from the interior of the nozzle to the exterior thereof through a circumferential spray orifice defineD between two frustoconical surfaces of the body, the frustoconical surfaces being positioned so that the emerging spray liquid is in the form of a generally conical curtain which diverges towards said front end, the included angle between said curtain and the line along which the body is elongated being approximately 60*, and shattering the curtain of spray liquid by means of an airstream flowing over the nozzle.