Structure for dispensing emulsion

Details Structure for dispensing emulsion Structure for dispensing emulsion

2002-03-28

2003-03-25

Derakshani, Philippe (Department: 3754)

Dispensing

Resilient wall

Supply container delivering to receiving chamber

C222S213000, C222S214000, C222S321900, C222S340000

Reexamination Certificate

active

06536630

ABSTRACT:

RELATED U.S. APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
The present invention relates generally to a dispenser, and more particularly to an emulsion dispenser.
BACKGROUND OF THE INVENTION
As shown in
FIGS. 1 and 2
, an emulsion dispenser of the prior art comprises a housing
10
in which a plunger
11
is disposed such that the top end of the plunger
11
juts out of a cap
12
via a hole
13
, and such that the top end of the plunger
11
is fastened to a saddle head
15
. The cap
12
and the saddle head
15
are engaged with each other by means of two threaded portions
16
and
17
. The housing
10
is provided with a shoulder
18
. Located between the shoulder
18
and the cap
12
is a container cap
19
of the emulsion container (not shown in the drawings). The plunger
11
is provided with a piston device
21
. The housing
10
has a tail tube
22
which is provided therein with a down valve
23
and a dip tube
24
in contact with the emulsion held in the emulsion container.
When the saddle head
15
is pressed, the emulsion is dispensed in handy units or portions via an exit
14
of the saddle head
15
. The plunger
11
is provided at the lower end with a recovery spring
25
serving to provided the plunger
11
with a recovery spring force enabling the plunger
11
to return to its original position in the housing
10
at the time when the saddle head
15
is relieved of the external force exerting thereon. With the exception of the recovery spring
25
which is made of metal, other component parts of the prior art emulsion dispenser are made of a plastic material. The metal spring
25
becomes a bottleneck in the process of recycling the discarded dispensers of the prior art. In other words, the metal spring
25
and other component parts of the prior art dispenser can not be separated in a cost-effective manner in the recycling process of the prior art dispensers.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide an emulsion dispenser which is free of a metal component part to facilitate the recycling of the discarded dispenser.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a dispensing structure comprising a housing, an engagement cap to engage the housing with an emulsion container, a plunger housed in the housing, an up valve, a down valve, and an elastic element disposed between the bottom end of the plunger and the bottom of the housing.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings.


REFERENCES:
patent: 5462208 (1995-10-01), Stahley et al.
patent: 5664703 (1997-09-01), O'Neill

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