Back to results
US 7,883,026 B2Granted
Fluid atomizing system and method
AssigneeIllinois Tool Works Inc.
InventorPaul R. 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.
Claims25
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, the generally annular passage has a cross-sectional area that alternatingly increases and decreases in a lengthwise direction along the liquid pathway, and the assembly is configured to induce swirling flow in the generally annular passage.
2 more elements
A spray device, comprising:
- a liquid spray tip, comprising:
- a pintle having a generally cylindrical portion, a first generally conical portion that converges toward a longitudinal axis of the pintle, and a second generally conical portion that diverges away from the longitudinal axis, wherein the first and second generally conical portions are directly adjacent one another, and the pintle is threadless;
- 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.
1 more element
A spray device, comprising:
- a liquid spray tip, comprising:
- a sleeve having a cylindrical interior surface;
- a pintle disposed in the sleeve, wherein the pintle comprises first and second conical surfaces disposed within the cylindrical interior surface, the first conical surface converges toward a longitudinal axis of the pintle in a downstream flow direction, the second conical surface diverges toward the longitudinal axis in the downstream direction, and the second conical surface diverges directly to a liquid exit between the pintle and the sleeve;
- and
- a nozzle having a downstream portion disposed in an upstream recess in the pintle, wherein the downstream portion comprises a central passage and a first radial passage leading to a first annular passage between the downstream portion and the upstream recess, wherein the pintle comprises a second radial passage extending from the first annular passage to a second annular passage between the pintle and the sleeve, wherein the second annular passage is defined by the cylindrical interior surface, the first conical surface, and the second conical surface.
2 more elements
A spray device, comprising:
- a liquid spray tip, comprising:
- a pintle having a generally cylindrical portion, a first generally conical portion that converges toward a longitudinal axis of the pintle, and a second generally conical portion that diverges away from the longitudinal axis, wherein the first and second generally conical portions are directly adjacent one another, wherein the pintle includes a first central passage coupled to a first outward passage in the generally cylindrical portion;
- 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;
- and
- a nozzle including a second central passage coupled to a second outward passages disposed in a tip portion, wherein the tip portion is disposed in the first central passage.
2 more elements
Dependencies are inferred from the claim text.