Fluid atomizing system and method
AssigneeIllinois Tool Works Inc.
InventorPaul Micheli
Life of this patent
Estimating the term…
Abstract
In accordance with certain embodiments, a system includes a spray device having a liquid pathway leading to a liquid exit, an air pathway leading to an air exit directed toward a spray region downstream of the liquid exit, and an assembly disposed in the liquid pathway adjacent the liquid exit. The assembly includes a threadless pintle generally fit into a sleeve in a concentric manner without threads. The assembly also includes a generally annular passage between the threadless pintle and the sleeve and a passage coupled with the generally annular passage. The generally annular passage also has a cross-sectional area that alternatingly increases and decreases in a lengthwise direction along the liquid pathway.
Claims26
A system, comprising:
- a spray device, comprising:
- a liquid pathway leading to a liquid exit;
- an air pathway leading to an air exit directed toward a spray region downstream of the liquid exit;
- and
- an assembly disposed in the liquid pathway adjacent the liquid exit, wherein the assembly includes a threadless pintle generally fit into a sleeve in a concentric manner without threads, the assembly includes a generally annular passage between the threadless pintle and the sleeve and a passage coupled with the generally annular passage, and the generally annular passage has a cross-sectional area that alternatingly increases and decreases in a lengthwise direction along the liquid pathway.
A spray device, comprising:
- a liquid spray tip, comprising:
- a pintle having a generally cylindrical portion, a first generally conical portion, and a second generally conical portion;
- and
- a sleeve having a generally cylindrical passage, wherein the generally cylindrical portion is press fit into the generally cylindrical passage, the first generally conical portion and the generally cylindrical passage define a diverging annular passage, the second generally conical portion and the generally cylindrical passage define a converging annular passage, and the pintle and the sleeve define a generally annular liquid exit.
A method, comprising:
- press fitting a pintle concentrically within a sleeve without threads to define a symmetric annular passage between the pintle and the sleeve, wherein the symmetric annular passage has a cross-sectional area that alternatingly increases and decreases in a direction along a lengthwise axis of the pintle and the sleeve;
- and
- assembling the pintle and the sleeve into a head of a spray device.
Dependencies are inferred from the claim text.