Fluid sprinkling – spraying – and diffusing – Including supply holder for material – Fluid pressure discharge means
Patent
1996-07-15
1998-07-07
Morris, Lesley D.
Fluid sprinkling, spraying, and diffusing
Including supply holder for material
Fluid pressure discharge means
B05B 730
Patent
active
057755949
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a sprayer for spraying liquid, such as liquid detergent and insecticide contained in a container, in the atomized state or foamed state.
BACKGROUND OF THE INVENTION
There are several kinds of sprayers as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 63-20970 (1988), Japanese Utility Model Application Laid-Open No. 64-12668 (1989), and Japanese Utility Model Publication No. 62-770 (1987). Such sprayers are of a so-called trigger-type. That is, such sprayers are each provided with a trigger energized (force-applied) forward by a coil spring, wherein the trigger can be pulled against elastic force of the coil spring to pressurize liquid in a pump chamber with a piston and to atomize the liquid, and then the trigger and the piston are returned by the elastic force of the coil spring to pump up liquid in the container into the pump chamber.
However, such a conventional sprayer has a problem of installing the coil spring into the sprayer while assembling the sprayer. That is, it is sometimes difficult to insert the coil spring to a hold opening for holding the coil spring because the axis of the coil spring is hard to coincide with the axis of the hold opening. Further, when the coil spring is inserted into the hold opening with the axes not coinciding with each other, the inner surface of the hold opening is sometimes scratched. Then, the coil spring touches the scratch during expansion and contraction of the coil spring, thereby disturbing the smooth expansion and contraction of the coil spring. One of the objects of the present invention is to solve this problem.
As one of the sprayers, a sprayer for foam-spraying liquid is disclosed in, for example, Japanese Patent Publication No. 62-59635 (1987). A conventional sprayer of this type sprays the liquid in a constant foaming state. That is, the sprayer can not change the foaming state for spraying. However, it may be convenient to change its foaming state in the practical use. One of the objects of the present invention is therefore to easily change its foaming state.
Furthermore, the present applicant has proposed a sprayer having a nozzle cover, which is disposed at the tip end of the spraying member having a spraying outlet at the front and center thereof to cover the spraying outlet and, the end of which is pivotably mounted to the upper end of the spraying member, wherein the sprayer is provided with holding means for holding the nozzle cover not to allow the nozzle cover to be opened while closing the spraying outlet (Japanese. Patent Application No. 6-27754 (1994)).
This sprayer can make the spraying outlet held in its closed state while not spraying. When the sprayer sprays with the nozzle cover held upwardly apart from the spraying outlet, however, there is a possibility of inadvertently pivoting the nozzle cover downward to block the spray. As the nozzle cover blocks the spray, the sprayed particles may be scattered in unexpected directions. One of the objects of the present invention is therefore to prevent the nozzle cover from inadvertently pivoting downward while spraying.
SUMMARY OF THE INVENTION
A sprayer according to the first aspect of the present invention comprises (a) a spraying member having a spraying outlet, (b) a cylinder, (c) a piston slidably inserted into the cylinder for sucking up liquid into the cylinder during the return motion, and spraying the liquid from a spraying outlet of the spraying member by pressing the liquid in the cylinder during the forward motion, and (d) a coil spring comprising a spirally wound coil wire disposed between the cylinder and the piston for energizing the piston in the returning direction, wherein a portion extending a predetermined length from each end of the coil is deflected in a direction approaching a coil axis of the coil wire, and the deflected portion is positioned on a plane perpendicular or nearly perpendicular to the coil axis of the coil wire.
The predetermined length from each end of the coil wire
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Akutsu Shigeru
Hayakawa Shigeru
Okawara Chitoshi
Sasazaki Mitsuhiro
Tasaki Takaharu
Morris Lesley D.
Yoshino Kogyosho Co. Ltd.
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