초록 ▼

There is provided a liquid atomizing spray gun of the general type that produce single, finite bursts of gas/liquid mixture which overcomes disadvantages of prior designs in that it does not depend for pressurizing and propelling gas on the squeezing of a trigger while aiming the device throughout t

There is provided a liquid atomizing spray gun of the general type that produce single, finite bursts of gas/liquid mixture which overcomes disadvantages of prior designs in that it does not depend for pressurizing and propelling gas on the squeezing of a trigger while aiming the device throughout the spraying stroke and in which a gas compressing piston is not driven by or otherwise directly mechanically linked to a trigger. These and other objectives are achieved in part by providing a spray gun with a chamber containing a gas tight piston that is reciprocable within the chamber, but wherein the piston is not reciprocated by the trigger. Instead, the piston is independently drawn to a rearward position for drawing gas into the chamber through a one way gas intake valve by the creation of a partial vacuum within the chamber. The piston is then released and biased forward to compress the gas within the chamber. The compressed gas is stored within the chamber until it is released at high velocity through a conduit by a user's opening a second expulsion valve by means of a trigger where it then passes in the vicinity of an exit end of a conduit leading to the source of liquid to be sprayed and causes the suction of a quantity of that liquid into the path of the exiting gas in accordance with Bernoulli's Principle of inverse proportionality of fluid velocity and pressure. An atomized mixture of gas and liquid is thereby created and propelled generally in the direction of motion of the exiting gas. Applications for the device include the spraying of small localized quantities of insecticides, air freshening liquids, insect repellents, animal repellents, deicing solutions for locks in cold weather, water or any other liquid.

대표청구항 ▼

[ What is claimed is:] [1.] A liquid-atomizing spray gun comprising:a sprayer housing having an internally disposed gas chamber with a rear wall, a front wall, and a side wall and containing a gas-tight piston reciprocable within said chamber between an extreme rearward position and an extreme forwa

[ What is claimed is:] [1.] A liquid-atomizing spray gun comprising:a sprayer housing having an internally disposed gas chamber with a rear wall, a front wall, and a side wall and containing a gas-tight piston reciprocable within said chamber between an extreme rearward position and an extreme forward position, said piston having a rear surface and a front surface;a normally closed one way gas intake valve leading from a source of gas to the interior of said chamber and situated such that rearward translation of said piston within said chamber causes the opening of said intake valve and the introduction of gas into said chamber through said intake valve;forward biasing means engaging and urging said piston toward its extreme forward position within said chamber for compressing gas introduced into said chamber between said front wall of said chamber and said front surface of said piston, said piston having an equilibrium position during compression of gas within said chamber which equilibrium position lies between said extreme rearward and extreme forward positions and is reached when the forces during gas compression acting rearwardly on said piston are equal and opposite the forces acting forwardly on said piston;piston drawing means connected to said piston, and accessible from outside said housing, for enabling a user to draw said piston toward its extreme rearward position within said chamber against said forward biasing means to draw gas into said chamber through said intake valve;an elongated gas conduit having an open gas intake end, an open gas expulsion end and a side wall extending between said gas intake and gas expulsion ends, said gas intake end being disposed in at least one of said front wall and said side wall of said gas chamber at a point between said front wall of said chamber and said front surface of said piston when said piston is in its extreme forward position so that said chamber is in fluid communication with said gas conduit and there is defined by said chamber and said gas conduit a gas passageway beginning in said chamber and extending through said gas expulsion end of said gas conduit;valve means accessible from outside said housing for selectively closing and opening the gas passageway extending between said chamber and said gas expulsion end of said gas conduit, said valve means being movable between a closed position for preventing pressurized gas from escaping from said chamber through said gas conduit and an open position for allowing pressurized gas to escape from said chamber through said gas conduit at high velocity;a reservoir for containing a liquid to be atomized and sprayed;a liquid conduit having an open liquid intake end and an open liquid exit end; said liquid intake end being in fluid communication with a quantity of liquid contained by said reservoir, said liquid exit end being sufficiently aligned with said gas expulsion end of said gas conduit so that when pressurized gas is permitted to escape from said chamber at high velocity through said gas expulsion end, the exiting gas will create a low pressure system in the vicinity of said liquid exit end sufficient to cause a substantial enough pressure differential between a gas pressure acting on the surface of the liquid within said reservoir and the vicinity of the high velocity gas to cause the higher pressure within the reservoir to force a quantity of liquid through said liquid conduit and out said liquid exit end into the path of the high velocity gas by which it will be atomized and sprayed substantially in the direction of motion of the exiting gas.