Spray gun with rolling wall diaphragm and quick disconnect housing
OwnerDavid Clark Huffmaninventor
Life of this patent
Estimating the term…
Abstract
A spray gun configured with a roiling wall diaphragm piston and vented piston cylinder connecting the needle to the needle actuator and isolating the liquid chamber of the nozzle body from the actuator section. The flange of the rolling wall diaphragm is sealed between the mating faces of the nozzle body housing and the actuator housing. The actuator is a double action air operated piston and cylinder. Sanitary, non-threaded quick disconnect couplings are used between the several components of the spray gun for easy cleaning and servicing of the nozzle body, tip and needle, and easy replacement of the rolling wall diaphragm.
Claims16
A spray gun for application of liquids in an atomized spray pattern, comprising:
- a nozzle body housing having a mating face, a liquid chamber opening to said mating face, a spray liquid supply port connecting to said liquid chamber, an atomizing spray nozzle with a fluid tip connecting to said liquid chamber, and a needle, said needle being moveable forward for closing said fluid tip to outflow of said spray liquid and moveable aft for opening said fluid tip to said outflow of said spray liquid,
- an actuator housing with a mating face, a vented diaphragm cylinder with one end opening on said mating face, a rolling wall diaphragm with a center section and a perimeter flange, a diaphragm piston installed in said diaphragm cylinder and attached to a diaphragm piston actuator, said center section of said diaphragm securable to said diaphragm piston, said perimeter flange extending over said mating face,
- a means for attaching said needle to said diaphragm piston, and
- a quick disconnect means for coupling said nozzle body housing to said actuator housing at respective said mating faces.
A spray gun for application of liquids in an atomized spray pattern, comprising:
- a nozzle body housing with a mating face, a liquid chamber opening to said mating face, a spray liquid supply port connecting to said liquid chamber, a spray air port, an atomizing spray nozzle with a fluid tip connecting to said liquid chamber and with spray air orifices connecting with said spray air port, and a needle, said needle being moveable forward for closing said fluid tip to outflow of said spray liquid and moveable aft for opening said fluid tip to said outflow of said spray liquid,
- an actuator housing with a mating face, a vented diaphragm cylinder with one end opening on said mating face, and a rolling wall diaphragm with a center section and a perimeter flange, said center section attached to a diaphragm piston, said diaphragm piston installed in said diaphragm cylinder and attached to a diaphragm piston actuator, said diaphragm piston actuator comprising a double action air operated piston and cylinder assembly with an opening air port and a closing air port, said perimeter flange of said diaphragm extending over said mating face, said needle having a threaded stem rotably engageable in a threaded centerbore in the face of said diaphragm piston, and
- a quick disconnect means for coupling said front housing to said rear housing.
A spray gun for application of liquids in an atomized spray pattern, comprising:
- a nozzle body housing having a nozzle end mating face and an actuator end mating face, a liquid chamber opening to both said mating faces, a spray liquid port connecting to said liquid chamber, a spray air port connecting to interior passageways, and a needle,
- an atomizing spray nozzle having a fluid tip and an air cap, said fluid tip having a nozzle body mating face and a spray liquid outflow orifice and an air cap with multiple spray air outflow orifices,
- a non-threaded quick disconnect means for coupling said spray nozzle to said nozzle body housing so as to connect said interior passageways to said spray air outflow orifices and to connect said liquid chamber to said spray liquid outflow orifice and to orient said needle for controlling flow through said fluid tip,
- an actuator housing having a nozzle body mating face, a vented diaphragm cylinder with a cylinder end opening on said mating face, and a rolling wall diaphragm with a center section and a perimeter flange, said center section attached to a diaphragm piston, said diaphragm piston installed in said diaphragm cylinder and attached to a diaphragm piston actuator, said perimeter flange extending over said mating face,
- a means for attaching said needle to said diaphragm piston, and
- a non-threaded quick disconnect means for coupling said nozzle body housing to said actuator housing.
Dependencies are inferred from the claim text.