Paint spray gun
AssigneeAccuSpray, Inc.
InventorJohn W. Hufgard
Life of this patent
Estimating the term…
Abstract
An improved spray nozzle for use with air atomizable liquids wherein the spray pattern created by the atomizing nozzle may be adjusted from a circular pattern to a flat pattern or alternatively to an open oval. The open end faces in preselected directions. The adjustments are capable of occurring during the continuous operation of the nozzle.
Claims30
A spray gun for use with air atomizable liquid comprising;
- means forming an air chamber having an outlet end;
- a liquid nozzle valve having a conical taper penetrating said air chamber and extending to and coaxially aligned with a central circular aperture in the outlet end of said air chamber;
- means for delivering a liquid to said central aperture for atomization by air exiting said air chamber through said central aperture;
- at least two pattern adjusting nozzles disposed adjacent to the central aperture of said air chamber;
- means for conducting air to said chamber and separate means for conducting air to said nozzles;
- means for adjusting the flow rate of air to said nozzles;
- and
- the outlet end of said air chamber having a converging down stream frusto-conical shape which terminates at said central aperture,
- said liquid nozzle valve including external means combined with said frusto-conical shape for providing an increasing down stream cross-sectional area in said air chamber toward said frusto-conical shape;
- said gun being formed as parts bolted together, said parts having internal passages which are mirror images of each other, said passages comprising said air conducting means extending from an air inlet into said gun to said chamber and said nozzles, and when said parts are bolted together said passages combined to form paths for air delivered to said air inlet from an air source connected to said gun, there being no additional passage means in said gun for conducting said air to said air chamber and said pattern adjusting nozzles.
A spray gun for use with air atomizable liquid comprising:
- a. a gun body forming a manually grippable handle and a spray directing section projecting from said handle;
- b. a liquid flow controlling valve supported by said gun body in said spray directing section;
- c. a chamber defined within said gun body spray directing section and an aperture defined in a wall of said chamber through which liquid and atomizing air may be directed;
- d. liquid directing means for introducing liquid from a liquid supply to said liquid flow controlling valve;
- e. air directing means for introducing air under pressure from an air supply to said chamber, said air directing means comprising a passage through which air flows to said chamber;
- f. said liquid flow controlling valve disposed at least partly in said chamber, liquid from said valve and air from said chamber interacting so that liquid is atomized and air and atomized liquid are sprayed away from said aperture;
- and,
- g. trigger means for governing operation of said liquid flow controlling valve to initiate and terminate an atomized liquid spray;
- h. said gun body comprising first and second body parts each defining a portion of said handle and spray directing section, each body part defining:
- i. a liquid flow controlling valve engaging structure;
- ii. trigger means engaging structure;
- and,
- iii. an air passage wall section;
- and,
- i. connector means for detachably clamping said body parts in an assembled condition with said liquid flow controlling valve and said trigger means secured in position relative to each other, said air passage wall sections hermetically secured in place when said body parts are clamped, said connector means operable to detach the gun body parts for enabling access to said liquid flow controlling valve, said air directing means and said trigger means.
A spray gun for use with an air atomizable liquid, comprising a body with handle and spray directing sections and passages therethrough for the flow of atomizing air, pattern adjusting air and liquid, the atomizing air and liquid discharged through an aperture in the spray directing section, and a trigger for controlling the liquid flow, said body comprising separate body parts and connector means for detachably clamping said body parts together, each body part forming part of each air passage so that when said body parts are clamped together they form said passages, said clamped body parts providing structure for receiving air and liquid supply connections.
Dependencies are inferred from the claim text.