Fluid substance dispenser

Details Fluid substance dispenser Fluid substance dispenser

1999-07-07

2001-01-23

Shaver, Kevin (Department: 3754)

Dispensing

Plural sources, compartment, containers and/or spaced jacket

With discharge assistant for each source

C222S327000, C222S390000

Reexamination Certificate

active

06176396

ABSTRACT:

BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates to a fluid substance dispenser which allows for easy and correct supplying of fluid substances such as a cosmetic, liquid paint, liquid adhesive and the like.
(2) Description of the Prior Art
Paints consisting of fluid substances have the advantages of creating a uniform application and easy mixing of multiple substances but also suffer from difficulties in adjusting the amount of application and in storage and holding. For these reasons, dispensers that can both store and supply the paint or application material have been used.
Dispensers of this kind have been known conventionally and disclosed in, for example, Japanese Utility Model Application Laid-Open Sho 60 No.148271, Japanese Utility Model Application Laid-Open Sho 58 No.91571, Japanese Utility Model Application Laid-Open Sho 60, No.161073, and U.S. Pat. No. 4,144,988.
Among these, Japanese Utility Model Application Laid-Open Sho 60 No.148271 discloses a configuration shown in
FIG. 1
, which includes: two containers A
1
and A
2
, arranged side by side, containing different types of viscous liquids ‘a’ and ‘b’; pistons A
3
and A
4
inserted in respective containers A
1
and A
2
for extruding the viscous liquids therein; and an extruding mechanism A
5
for moving pistons A
3
and A
4
forwards. Extruding mechanism A
5
is constructed such that a lever A
6
is moved toward a handle A
7
so as to move forward a U-shaped extruder rod A
8
. The two ends of rod A
8
are abutted against the aforementioned pistons A
3
and A
4
and hence move the pistons forwards to thereby eject viscous liquids ‘a’ and ‘b’ stored in respective containers A
1
and A
2
, from ejection opening A
1
a
and A
2
a
of containers A
1
and A
2
.
The configuration shown in Japanese Utility Model Application Laid-Open Sho 58 No.91571, as shown in
FIG. 2
, includes: a container B
1
having a partition wall B
2
therein forming two chambers B
3
and B
4
; and pressing rods B
6
and B
7
attached to a thumb rest B
5
and having piston heads B
8
and B
9
at the front end thereof, wherein piston heads B
8
and B
9
are fitted in respective chambers B
3
and B
4
. In this configuration, as thumb rest B
5
is thrust forwards, piston heads B
8
and B
9
move forwards together with pressing rods B
6
and B
7
, to thereby eject the two types of liquids previously stored in chambers B
3
and B
4
out from the front openings of chambers B
3
and B
4
.
The configuration shown in Japanese Utility Model Application Laid-Open Sho 60 No.161073, as shown in
FIGS. 3 and 4
, includes: a cylindrical barrel C
1
partitioned by partitioning element C
2
forming two storage spaces C
3
and C
4
; an ejection opening C
5
communicating with storage spaces C
3
and C
4
at their one end with uneven cross-sectional area ratio; pressing elements C
6
and C
7
positioned at the other end of storage spaces C
3
and C
4
, so that the movement of the pressingelements causes fluidcomponents ‘a’ and ‘b’ filling respective storage spaces C
3
and C
4
to flow out from ejection opening C
5
in a prescribed ratio.
The configuration shown in U.S. Pat. No. 4,144,988 comprises: as shown in
FIG. 5
, a cylinder D
1
; a piston D
2
accommodated therein; a threaded shaft D
3
fitted through the center of, and mated with, piston D
2
; and a rotary actuator D
4
fitted rotatably at the rear end of the threaded shaft, forming a cylindrical shape. Piston D
2
will not rotate with respect to cylinder D
1
but can move only in the axial direction. When rotary actuator D
4
is rotated to turn threaded shaft D
3
, piston D
2
mated therewith moves back and forth. As the piston moves forwards, a liquid ‘a’ stored in cylinder D
1
is pressed and ejected from an ejection opening D
1
a.
Of the above conventional dispensers, the dispensers designated as B and C are configured so that the operator directly presses the pressing element forwards so as to eject the fluid substances. Therefore, these configurations have made it difficult to gain a finely adjusted amount of ejection, posing a problem of the operator needing to be skillful to exactly obtain a desired, ejected amount. In particular, in order to eject a highly viscous fluid from an ejection opening having a small diameter, a strong force needs to be applied on the piston. This situation has further made it difficult to make fine adjustment to the pressing element, degrading the work efficiency.
Dispenser A produces substantially the same situation as that of the above B and C, in respect that the pressing element is moved in correspondence with the distance of movement of the lever which is moved approximately linearly, though the pressing element is not directly actuated. Therefore, this configuration also produces the problem of inability of fine adjustment of the ejected amount of the fluid substances. Moreover, since the extruding mechanism of the pressing element is provided with a large lever so as to make the lever control light and since the pressing rod is projected to a large amount rearwards, the dispenser as a whole is bulky, a disadvantage to its carriage.
In contrast, the configuration disclosed in U.S. Pat. No. 4,144,988 makes possible fine adjustment relatively easily since the rotation of the threaded shaft by the rotary actuator is converted into a linear movement of advancement of the piston. However, the dispenser disclosed therein is to distribute a single-component fluid substance. Therefore, when two kinds of fluid substances need to be applied while being mixed, the application should be carried out by holding two dispensers. That is, the task of application has to be carried out whilst two rotary actuators of the dispensers are being handled, leading to a markedly cumbersome work and a high cost.
SUMMARY OF THE INVENTION
The present invention has been devised in view of the problems of the above prior art, and it is therefore an object of the present invention to provide a compact dispenser which is low in price and excellent in its carriage and which enables plural types of fluid substances to be distributed in a finely adjusted amount under simple handling.
In order to achieve the above object, the present invention is configured as follows:
In accordance with the first aspect of the present invention, a fluid substance dispenser, includes:
a main casing defining a hollow space therein having a plurality of fluid substance storage spaces extending in, and partitioned along, the axial direction thereof;
a single ejection port arranged in front of the fluid substance storage spaces for allowing the fluid substances to be ejected simultaneously at a predetermined amount; and
a forward-actuating mechanism for advancing the fluid substances stored in the fluid substance storage spaces toward the ejection port, wherein the forward-actuating mechanism comprises: in each fluid substance storage space, a piston movably fitted therein and having a female threaded hole at a predetermined position and a forward actuation shaft having a male thread mating the female threaded hole, forming a piston moving mechanism which converts rotational movement of the forward actuation shafts into linear movement of the male-female mating position to thereby produce at least a forward-directed thrust force acting on the piston and move the piston at least forwards; and a shaft rotating mechanism for turning the forward actuation shafts, which is composed of a single forward-actuating knob rotatably supported in the main casing and a gear mechanism for transmitting the rotation of the forward-actuating knob to each of the forward actuation shafts.
In accordance with the second aspect of the present invention, a fluid substance dispenser, includes:
a main casing defining a hollow space therein including a plurality of inner sleeves extending in the axial direction thereof, each inner sleeve forming a fluid substance storage space;
a single ejection port arranged in front of the inner sleeves for allowing the fluid substances to be ejected simultaneously at a pr

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