Dispensing – With discharge assistant – With material supply container and discharge assistant with...
Reexamination Certificate
2001-12-07
2003-12-30
Mancene, Gene (Department: 3754)
Dispensing
With discharge assistant
With material supply container and discharge assistant with...
C222S380000, C222S153130, C239S321000
Reexamination Certificate
active
06669061
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a pump dispenser, and in particular to a manually operated pump dispenser wherein the liquid contained in a cylinder is compressed by the displacement of a trigger structure so that the liquid may be ejected from the nozzle orifice. The invention also relates to a spraying apparatus provided with such a pump dispenser.
2. Description of Related Art
Traditionally, manually operated pump dispensers mounted on a vessel have been used for ejecting liquid.
FIGS. 17 and 18
show examples of the parallel displacement model of this type of pump dispenser, and are respectively a schematic illustration showing how it is used and an expanded sectional view showing specifically its construction.
This pump dispenser
100
is mounted on a liquid vessel B, and the liquid sucked from the vessel B and contained in the cylinder
101
is compressed with a piston
103
by the displacement of the trigger
102
and is ejected from the nozzle
104
.
The trigger
102
in this case is on the prolongation of the piston
103
and displaces in parallel, in other words it has a parallel displacement-type construction.
Unlike rotary trigger spraying apparatus, it has no winged protruding trigger and is relatively compact.
In actual use, as shown in
FIG. 17
the user operates it by opening the fingers, for example, the index finger and the middle finger and holding the trigger
102
with them.
And by applying force on the fingers holding the trigger and pulling the trigger towards the cylinder
101
, the liquid contained in the cylinder
101
is compressed and is ejected from the nozzle
104
.
However, the operation of opening the fingers as mentioned above in the traditional examples, holding the trigger
102
with them and pulling the trigger
102
towards the cylinder
101
is different from the usual way of using fingers. Therefore, the operation is complicated and not so easy to perform.
And for example while the index finger and the middle finger are opened and hold the trigger
102
, on the other side the inner lower surface of the thumb will be in contact with the back side of the pump dispenser, and when the trigger is pulled with force, the fingers will be in an unnatural state.
Moreover, as shown in
FIG. 17
or
FIG. 18
, the nozzle
104
is arranged at the end of a straight line from the cylinder
101
, and therefore in the event of a leakage, due to the position of the nozzle
104
between the fingers, the fingers tend to become soiled with the liquid.
And when the liquid is ejected downward, the whole liquid vessel integrated with the pump dispenser
100
must be inclined for use so that the nozzle
104
may face downward. Thus, a momentum results from the weight of the liquid vessel and burdens the operating hands.
And when the pump-dispenser is used in such an inclined position, if the cap
105
is not closed tightly enough, the liquid may leak from the gap between the cap
105
and the orifice of the vessel B.
On the other hand, in case of a pump dispenser with a rotary trigger not shown, as a trigger based on rotary motion is operated to start a linear motion of the piston, the piston and the trigger are connected by a free motion hole.
Accordingly, the transmission of power from the trigger to the piston is not necessarily precisely assured, and the oscillating motion of the piston in relation to the cylinder often becomes unstable.
And the trigger, the valve case, etc. are independent, resulting in a large number of components as a whole.
SUMMARY OF THE INVENTION
This invention was made under such a technical background.
It is therefore an object of this invention to provide a pump dispenser that gives a precise trigger motion to the piston and enables stable motion of the piston.
It is another object of this invention to provide a manually operated pump dispenser that can prevent careless operation of the trigger.
Another object of this invention is to provide a spraying apparatus provided with such a pump dispenser.
Thus, as the result of their devoted and intensive research carried out under such a background, the inventors of this invention found that the various problems mentioned above can be solved by integrating the valve casing (the second valve casing), the trigger section and the trigger guide section into a single trigger structure, and completed this invention based upon this finding.
This invention relates to (1) a manually operated pump dispenser mounted on a vessel wherein liquid contained in the cylinder section is compressed with a piston section by the displacement of a trigger structure and is ejected through the nozzle orifice, and includes a base body fixed on a vessel orifice via a packing structure including a cylinder section and a vent cylinder section formed adjacent to each other on the base body, the trigger structure including a trigger section, a second valve casing section mounted on the base body, and a trigger guide section oscillating in the vent cylinder section.
This invention also relates to (2) a pump dispenser wherein the nozzle cover is integrated with the second valve casing section via a hinge section.
This invention also relates to (3) a pump dispenser wherein the nozzle cover includes a protrusion designed to block the nozzle orifice.
This invention also relates to (4) a pump dispenser wherein the nozzle cover includes a mesh section for foaming and a nozzle stopper is provided between the nozzle cover and the nozzle orifice for closing the nozzle orifice.
This invention also relates to (5) a pump dispenser wherein the second valve casing section includes an anti-falling section relative to the base body.
This invention also relates to (6) a pump dispenser wherein the second valve casing includes an inside boss section and an outside boss section between which the cylinder section oscillates.
This invention also relates to (7) a pump dispenser wherein the outside boss section of the second valve casing forming a nozzle cover is formed with a downwardly slanting extension.
This invention also relates to (8) a pump dispenser wherein a virgin seal for preventing the pull back of the trigger structure is integrated with the vent cylinder section of the base body.
This invention also relates to (9) a pump dispenser wherein a trigger lock section for preventing the pull back of the trigger structure is integrated with the base body via a hinge section, and the trigger lock section is formed so as to be in contact with the final end of the outside boss section of the second valve casing section.
This invention also relates to (10) a pump dispenser wherein an inside virgin seal is provided at the final end of a cylindrical body of the piston section and a protruding shaft is provided in a cylinder receptacle section formed at the deepest end of the cylinder section.
This invention also relates to (11) a pump dispenser wherein a first valve casing section and a packing are integrated with each other to form the packing structure.
This invention also relates to (12) a pump dispenser wherein the packing structure is integrated with a tubular body.
This invention also relates to (13) a manually operated trigger-type pump dispenser mounted on a vessel wherein liquid contained in the cylinder is compressed via a piston section by the displacement of a trigger structure and is ejected through a nozzle orifice, including a base body fixed on the vessel orifice via a packing structure, a cylinder section and a vent cylinder section formed adjacent to each other on the base body, the trigger structure including a trigger section, a second valve casing section mounted on the base body, and a trigger guide section oscillating in the vent cylinder section, a nozzle cover integrated with the second valve casing section via a hinge section and a protrusion for plugging the nozzle orifice at the top of the second valve casing section formed by the nozzle cover, the second valve casing section being provided with an outside boss section and an inside boss section between which a cylinde
Canyon Co., Ltd.
Flynn ,Thiel, Boutell & Tanis, P.C.
Mancene Gene
Nicolas Frederick C.
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