Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Reexamination Certificate
1999-10-21
2001-05-15
Kaufman, Joseph A. (Department: 3754)
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
C222S481500, C222S442000
Reexamination Certificate
active
06230942
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a metered dispensing pump device preventable of water permeation. The device can be used on various bottles for suction and dispensing of liquid therein. The present invention is especially related to an improved metered dispensing pump device for liquid suction from a bottle loaded with hand washing cream, hair shampoo or shower gel etc. used for bathing. The liquid in the bottle can be protected from permeation and pollution of showering water by the device. And the stability and quality of the chemical liquid in the bottle can thus be well kept.
2. Description of the Prior Art
As is well known, a bottle loaded with normal chemical liquid such as hand washing cream, hair shampoo or shower gel etc. mostly is equipped with a metered dispensing pump device to allow a user to press it for suction of quantitative chemical liquid. Such a bottle loaded with normal chemical liquid such as hand washing cream, hair shampoo or shower gel etc. normally is placed in a watery environment such as in a bath room, especially at the spot under a shower for a user to conveniently press and obtain the chemical liquid for washing hair or body. However, the conventional metered dispensing pump device (as shown in
FIG. 1
) mounted on the bottle loaded with normal cleaning liquid placed in the watery environment is not water proofing, and water can often permeate into the bottle to influence quality of the chemical liquid.
In the conventional metered dispensing pump device shown in
FIG. 1
as an example, when a user presses a liquid discharging knob
1
, a piston
22
in a liquid storing pipe
2
full of the liquid is pressed down to approach a pipe-like seat
4
to make the liquid in the liquid storing pipe
2
push away a steel bead
21
. Thereby, the liquid is discharged out of the bottle
10
through the liquid discharging knob
1
, and an object of taking the liquid in a simple way can be obtained. And by elastic stretching and compressing of a spring
23
, the piston
22
and the pipe
2
are pushed upwardly to provide suction, air can get through an air way
33
formed between a wall in a groove
31
of a cap
3
and the liquid storing pipe
2
and through a positioning annulus
32
to release the vacuum state in the bottle
10
. Thereby, the liquid in the bottle
10
can propitiously push away a steel bead
41
on a liquid supplying pipe
42
to recharge the pipe
2
.
Nevertheless, the above stated conventional metered dispensing pump device can have its groove
31
for receiving the liquid discharging knob
1
been accumulated with bathing water when in showering. When the liquid discharging knob
1
is pressed down, the bathing water accumulated in the groove
31
will get through the positioning annulus
32
and the airway
33
into the bottle
10
. This pollutes the liquid in the bottle
10
and makes water therein diluted, makes microbe therein propagate to decay or deteriorate the liquid. These troubles come mainly from the air way
33
formed between the wall in the groove
31
of the cap
3
and the liquid storing pipe
2
and opening downward into the bottle
10
(as shown in FIG.
1
). Therefore, it is the motive of the present invention to thoroughly solve these problems.
SUMMARY OF THE INVENTION
In view of the above stated problems of pollution and deterioration of liquid in the bottle, the primary object of the present invention is to prevent permeation of water into the bottle through an air way formed between a wall in a groove and a liquid storing pipe of a metered dispensing pump device when in pressing the device. Thereby an object of protecting the liquid in the bottle from pollution of the exterior bathing water can be obtained.
In order to achieve the above object, the peripheral wall of the liquid storing pipe can be changed to have an obliquity, and a tapered pipe with its pipe mouth much higher than the cap is provided. So that liquid storing pipe having an obliquity can be tightly connected with the higher pipe mouth of the tapered pipe before pressing the metered dispensing pump device to prevent water from permeating, and can form an air way after pressing. The air way is formed at a location higher than the groove which is subjected to accumulation of water, hence bathing water accumulated in the groove will not permeate into the bottle. And chemical quality of the cleaning liquid in the bottle can be protected.
The present invention will be apparent after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings.
REFERENCES:
patent: 3229864 (1966-01-01), Roder
patent: 3844452 (1974-10-01), Blum
patent: 4930670 (1990-06-01), Kuo
patent: 5549223 (1996-08-01), Hori
patent: 5725128 (1998-03-01), Foster
patent: 5826756 (1998-10-01), Foster
patent: 6006949 (1999-12-01), Foster et al.
Deal David
Kaufman Joseph A.
Pro-Techtor Inter-national Services
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