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US 5,332,159 AGranted
Spray gun with dual mode trigger
AssigneeRansburg Corporation
InventorsThomas E. Grime, James P. Baltz, Roger T. Cedoz, John F. Schaupp
Life of this patent
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AssigneeRansburg Corporation
InventorsThomas E. Grime, James P. Baltz, Roger T. Cedoz, John F. Schaupp
Estimating the term…
A paint spray gun having a dual operating mode trigger. The trigger pivots on a gun body about an axis. The two operating modes are selected by radially positioning the trigger relative to the axis. In a first operating mode, fluid flow to a nozzle is gradually increased as the trigger is gradually squeezed to permit fluid flow control for feathering the applied coating. In this mode, the trigger is mechanically linked for actuating a valve needle. In a second operating mode, a small actuating movement of the trigger operates a valve which causes a piston to move the valve needle to its fully open position. The second operating mode provides only on-off fluid control with a very short trigger stoke and a low trigger force.
A hand held liquid spray gun including a gun body having first and second ends, a liquid atomization nozzle assembly secured to said first end, a handle extending from adjacent said second end for holding said spray gun, and a main trigger for controlling the discharge of liquid from said spray gun, said spray gun being characterized by said trigger having first and second operating modes, first means responsive to trigger movement for varying the amount of liquid discharged from said spray gun as a function of trigger movement between fully off and a predetermined maximum liquid flow when said trigger is in said first operating mode, and second means responsive to a predetermined small trigger movement when said trigger is in said second operating mode for controlling the flow of liquid discharged from said spray gun between fully off and said predetermined maximum liquid flow, and wherein said trigger is moveable over a greater range of movement in said first operating mode than in said second operating mode.
A hand held liquid spray gun including a gun body having first and second ends, a liquid atomization nozzle assembly secured to said first end, a handle extending from adjacent said second end for holding said spray gun, and a main trigger for controlling the discharge of liquid from said spray gun, said spray gun being characterized by said trigger having first and second operating modes, first means responsive to trigger movement for varying the amount of liquid discharged from said spray gun as a function of trigger movement when said trigger is in said first operating mode, second means responsive to a predetermined small trigger movement when said trigger is in said second operating mode for turning fully on and off the flow of liquid discharged from said spray gun, valve needle means mounted in said gun body for controlling the discharge of liquid from said spray gun, mechanical linkage means for moving said valve needle means in response to movement of said trigger when said trigger is in said first operating mode, piston means for moving said valve needle means between open and closed positions, and valve means for causing said piston means to move said valve needle means to said open position when said trigger is in said second operating mode and squeezed.
A hand held liquid spray gun, as set forth in 8, and wherein said piston means includes an integral air valve for controlling a flow of atomization and pattern shaping air to said nozzle assembly, said piston means moving between a first position wherein said air valve is closed and a second position, said air valve opening to provide a flow of atomization and pattern shaping air when said piston is moved to an intermediate position between said first and second positions, and a return spring urging said piston towards said first position.
A hand held liquid spray gun, as set forth in claim 13, and further including means on said piston for engaging said valve needle means when said piston has moved to said intermediate position, and wherein said piston moves said valve needle means to said open position when said piston is moved from said intermediate position to said second position.
Dependencies are inferred from the claim text.