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US 9,802,211 B2Granted
Spray head assemblies for liquid spray guns
Assignee3M Innovative Properties Company
InventorsStephen C. P. Joseph, Brian E. Duncan
Life of this patent
Estimating the term…
Abstract
Spray head assemblies, including an air-handling saddle that is attachable to a liquid spray gun platform, a liquid-handling core that is slidably engagable into the air-handling saddle, and an air cap; spray guns using such assemblies; and, methods of using such assemblies.
Claims28
A spray head assembly for use with a liquid spray gun platform, comprising:
- an air-handling saddle that is attachable to the liquid spray gun platform;
- an air cap that is attachable to the air-handling saddle;
- a liquid-handling core that is slidably engagable into the air-handling saddle in a direction from a forwardmost end toward a rearwardmost end of the air-handling saddle, the liquid-handling core comprising a protruding portion comprising a liquid-handling passage inlet to mate with a separate container containing a liquid to be sprayed, wherein the liquid-handling core does not comprise any center air or fan air passages leading through any portion of the liquid-handling core.
A method of changing a liquid-handling core of a spray head assembly, comprising:
- slidably engaging a second liquid-handling core into an air-handling saddle in a direction from a forwardmost end toward a rearwardmost end of the air-handling saddle, the second liquid-handling core comprising a protruding portion that engages with an interrupted annulus of the air-handling saddle, wherein the second liquid-handling core does not comprise any center air or fan air passages leading through any portion of the liquid-handling core.
A spray head assembly for use with a liquid spray gun platform, comprising:
- an air-handling saddle that is attachable to the liquid spray gun platform, an air cap that is attachable to the air-handling saddle, and a liquid-handling core that is slidably engagable into the air-handling saddle in a direction from a forwardmost end toward a rearwardmost end of the air-handling saddle, wherein the liquid-handling core does not comprise any center air or fan air passages leading through any portion of the liquid-handling core;
- wherein the air-handling saddle consists of a unitary piece of integrally molded plastic that comprises an interrupted annulus, at least one center air passage, and at least one fan air passage.
A spray head assembly for use with a liquid spray gun platform, comprising:
- an air-handling saddle that is attachable to the liquid spray gun platform, the air-handling saddle comprising an interrupted annulus;
- an air cap that is attachable to the air-handling saddle, and
- a liquid-handling core that is slidably engagable into the air-handling saddle, the liquid-handling core comprising a protruding portion that is engagable within the interrupted annulus of the air-handling saddle;
- wherein the liquid-handling core consists of a unitary piece of molded plastic that is removable from the saddle and that is disposable;
- and,
- wherein the liquid-handling core does not include a needle that is removable from the liquid spray gun platform along with the liquid-handling core;
- wherein the liquid-handling core does not include, or provide any part of, a center air passage or a fan air passage;
- and,
- wherein a liquid-handling passage of the liquid-handling core comprises a liquid-handling junction that fluidly connects a liquid-entry passage that is within a hollow protrusion that protrudes generally radially outward from a hollow shaft of the liquid-handling core, to an elongate chamber within the hollow shaft of the liquid-handling core,
- and wherein when the core is slidably engaged into the air-handling saddle and the air-handling saddle is attached to the liquid spray gun platform, no part of the liquid spray gun platform is located forward of the liquid-handling junction of the liquid-handling passage of the liquid-handling core.
7 more elements
Dependencies are inferred from the claim text.