Claims
- 1. 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.
- 2. A hand held liquid spray gun, as set forth in claim 1, and including means mounting said trigger on said gun body to pivot towards and away from said handle, and wherein said trigger pivots over a range of at least 10.degree. when said trigger is operated in said first mode, and wherein said trigger pivots over a range of less than 10.degree. when said trigger is operated in said second mode.
- 3. A hand held liquid spray gun, as set forth in claim 2, and wherein said trigger pivots over a range of no greater than 5.degree. when said trigger is operated in said second mode.
- 4. A hand held liquid spray gun, as set forth in claim 1, and wherein said trigger requires an operating force of no greater than 0.9 Kg. in said first operating mode and requires an operating force of no greater than 0.45 Kg. in said second operating mode.
- 5. A hand held liquid spray gun, as set forth in claim 1, and further including means mounting said trigger on said body to pivot towards and away from said handle, wherein said trigger has a first position relative to a pivot point on said gun body when in said first operating move, and said trigger has a second position relative to said pivot point when in said second operating mode.
- 6. A hand held liquid spray gun, as set forth in claim 5, wherein said trigger is moveable in a generally radially direction relative to said pivot point between said first and second positions, and including means for retaining said trigger in a selected one of said first and second positions.
- 7. A hand held liquid spray gun, as set forth in claim 1, and further including adjustment means for simultaneously setting the maximum liquid discharge rate from said spray gun in said first operating mode and the liquid discharge rate from said spray gun in said second operating mode.
- 8. 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.
- 9. A hand held liquid spray gun, as set forth in claim 8, and further including means mounting said trigger on said body to pivot towards and away from said handle, wherein said trigger has a first position relative to a pivot point on said gun body when in said first operating move, and said trigger has a second position relative to said pivot point when in said second operating mode.
- 10. A hand held liquid spray gun, as set forth in claim 9, wherein said trigger is moveable in a generally radially direction relative to said pivot point between said first and second positions, and including means for retaining said trigger in a selected one of said first and second positions.
- 11. A hand held liquid spray gun, as set forth in claim 9, and including means on said trigger for engaging said mechanical linkage to control said spray gun when said trigger is in said first position, and means on said trigger for operating said valve means to control said spray gun when said trigger is in said second position.
- 12. 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.
- 13. 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.
- 14. A hand held liquid spray gun, as set forth in claim 13, wherein said mechanical linkage means includes an actuator arm mounted on said spray gun body to rotate between first and second positions, and means for moving said piston from said first piston position to said second piston position when said actuator arm is rotated from said first actuator arm position to said second actuator arm position.
- 15. A hand held liquid spray gun, as set forth in claim 14, and wherein said trigger means includes means operable only when said trigger is in said first operating mode for rotating said actuator arm from said first actuator arm position progressively towards said second actuator arm position as said trigger means is progressively squeezed.
- 16. A hand held liquid spray gun, as set forth in claim 15, wherein said handle depends from a bottom of said gun body, and further including an auxiliary trigger mounted on said gun body to pivot towards and away from a top of said gun body, and means for rotating said actuator arm from said first actuator arm position progressively towards said second actuator arm position as said auxiliary trigger is progressively pivoted towards said gun body top.
- 17. A hand held liquid spray gun, as set forth in claim 16, and including means mounting said main trigger on said gun body to pivot towards and away from said handle, said main trigger pivoting over a predetermined arc when said spray gun is operated by said main trigger in said first operating mode, and wherein said main trigger is pivotal away from said handle over an arc greater than said predetermined arc to facilitate grasping said gun body between said handle and said main trigger when using said auxiliary trigger.
CROSS REFERENCE TO RELATED APPLICATION
This is a continuation-in-part of copending U.S. patent application Ser. No. 07/894,730 filed May 27, 1992, now U.S. Pat. No. 5,236,129.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
887013 |
Dec 1981 |
SUX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
894730 |
May 1992 |
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