U.S. patent application number 10/261937 was filed with the patent office on 2003-04-24 for sealing valve for vacuum container.
Invention is credited to Lin, Chang-San.
Application Number | 20030075542 10/261937 |
Document ID | / |
Family ID | 21686715 |
Filed Date | 2003-04-24 |
United States Patent
Application |
20030075542 |
Kind Code |
A1 |
Lin, Chang-San |
April 24, 2003 |
Sealing valve for vacuum container
Abstract
A kind of sealing valve for vacuum container comprising: the cap
body, the connecting body and the locking portion; the cap body is
to be jointed to the locking portion through the connecting body;
the locking portion is formed with the concave portion; the locking
portion is to lock onto the hole on the upper cap via the concave
portion, thus when the vacuum pump proceeds to extract air out of
the vacuum container, the cap body is to be deflected and deformed
by air flow, so that the air hole of the upper cap is to be opened,
and then the cap body is to automatically close the air hole of the
upper cap after the pressure difference between the interior and
exterior of the vacuum container has reached the predetermined
value.
Inventors: |
Lin, Chang-San; (Sanchung
City, TW) |
Correspondence
Address: |
BACON & THOMAS, PLLC
625 SLATERS LANE
FOURTH FLOOR
ALEXANDRIA
VA
22314
|
Family ID: |
21686715 |
Appl. No.: |
10/261937 |
Filed: |
October 2, 2002 |
Current U.S.
Class: |
220/203.13 ;
220/231; 220/367.1 |
Current CPC
Class: |
B65D 51/1644
20130101 |
Class at
Publication: |
220/203.13 ;
220/231; 220/367.1 |
International
Class: |
B65D 051/16 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 3, 2001 |
TW |
90216819 |
Claims
What is claimed is:
1. A sealing valve for vacuum container comprising: a cap body, a
connecting body and a locking portion, wherein said cap body, of
umbrella shape, is to be jointed with said locking portion through
said connecting portion; said cap body, connecting body and locking
portion are integrally formed.
2. A sealing valve for vacuum container as in claim 1, wherein said
locking portion is formed with a concave portion.
3. A sealing valve for vacuum container as in claim 1, wherein said
sealing valve is made of rubber material.
4. A sealing valve for vacuum container as in claim 1, wherein the
vertical length from the top of said cap body to the edge thereof
is larger than that from said top of said cap body to the bottom
surface of said locking portion.
5. A sealing valve for vacuum container as in claim 1, wherein the
inner surface of said cap body is of arc shape.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a kind of sealing valve, more
particularly, a kind of sealing valve for vacuum containers, e.g.,
food-preserving containers or ash containers, that maintains the
containers under vacuum condition, with multiple merits of simple
structure, easy use and excellent sealing effect.
[0003] 2. Description of the Prior Art
[0004] The common food-preserving containers, for the purpose of
assuring the degree of freshness of food contained inside, are
usually installed with sealing valves on cap body so as to prevent
air from re-entering into the containers after the containers being
vacuumed.
[0005] In addition, the design of bone-ash urns for preserving bone
ashes is becoming high-tech oriented, with not only the sealing
valves being installed, but also the multiple-layered epoxy resin
being attached onto the urn bodies. As a result, the vacuum state
inside the bone-ash urns is to be kept, so as to preserve bone
ashes effectively, thus expressing the respect and memory toward
the deceased.
[0006] The conventional sealing valve provides the function of
enabling air to one-way circulation, and for achieving such
function, the conventional sealing valve is to be composed of a
variety of parts, or O-shaped rings made of metal along with
rubber. No matter what kinds of parts or material being used, the
common characteristic is the structural complexity.
[0007] No matter what kind of structural types for the sealing
valves or application types for vacuum containers, such minimized
vacuum container having sealing salve needed to be manually
operated to vacuum the air out to achieve the object of vacuuming
the air inside the vacuum container.
[0008] Consequently, even though the conventional sealing valve
maintain the function of enabling air to one-way circulation, the
production cost is to be driven higher because of the structural
complexity thereof, which might compromise the air-tightness of the
vacuum container.
SUMMARY OF THE INVENTION
[0009] The object of the invention is to provide a kind of sealing
valve, more particularly, a sealing valve used in vacuum
containers, e.g., food-preserving containers and bone-ash
containers, for preserving items under state of vacuum, with
multiple merits of simple structure, easy use and excellent sealing
effect. For achieving the aforementioned object, the sealing valve
for vacuum containers of the invention comprises the cap body, the
connecting body and the locking portion. The cap body is to be
jointed to the locking portion through the connecting body; the
locking portion is formed with the concave portion, the locking
portion is to lock onto the hole on the upper cap via the concave
portion, thus when the vacuum pump proceeds to extract air out of
the vacuum container, the cap body is to be deflected and deformed
by air flow, so that the air hole of the upper cap is to be opened,
and then the cap body is to automatically close the air hole of the
upper cap after the pressure difference between the interior and
exterior of the vacuum container has reached the predetermined
value.
[0010] The sealing valve performs better with the material being
rubber having deflected nature and integrally formed. The rubber
material can be synthetic or natural rubber.
[0011] The sealing valve performs better when the vertical length
between the top of the cap body and the edge of the cap body is
larger than that between the top of the cap body and the bottom
surface of the locking portion.
[0012] The sealing valve performs better when the cap body is
formed as umbrella shape.
[0013] The sealing valve performs better when the inner surface of
the cap body is formed as arc shape.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] These and other features, aspects and advantages of the
present invention will become better understood with regard to the
following description, appended claims and accompanying drawings
that are provided only for further elaboration without limiting or
restricting the present invention, where
[0015] FIG. 1 shows a sectional and structural view of the
preferred embodiment for the sealing valve of the invention;
[0016] FIG. 2 shows a sectional and structural view of the sealing
valve of the invention used in the vacuum container, wherein the
state before being vacuumed is shown;
[0017] FIG. 3 shows a state of FIG. 2 during the vacuuming process;
and
[0018] FIG. 4 shows a state of FIG. 2 after the vacuuming
process.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0019] Please refer to FIG. 1, the sealing valve 1 of the invention
comprises a cap body 10, a connecting body 11 and a locking portion
12, wherein the cap body 10 is to be jointed to the locking portion
12 through the connecting body 11; the locking portion 12 contains
a concave portion 13; the cap body 10 is formed as umbrella shape;
and, the inner surface 14 of the cap body 10 is of arc shape.
[0020] The preferred embodiment for the sealing valve 1 of the
invention is for the vertical length H1 between the top of the cap
body 10 and the edge of the cap body 10 to be larger than the
vertical length H2 between the top of the cap body and the bottom
surface of the locking portion 12; furthermore, the preferred
embodiment for the sealing valve 1 of the invention is for the
sealing valve 1 to be made of rubber having deflective quality and
integrally formed. The rubber material can be synthetic rubber or
natural rubber.
[0021] As shown in FIG. 2, common vacuum container 2 includes an
upper cap 20 and the main body 25, wherein the upper cap 20
contains a concave portion 21, with the hole 22 and the air hole 23
installed therein. At first, place the items ready to be preserved
into the main body 25, and then the upper cap 20 is to be put on,
and further the sealing procedure is to be proceeded on the
jointing portion between the upper cap 20 and the main body 25
(e.g., for long-term preservation, epoxy resin is to be applied
thereon; for short-term preservation, the O-shaped rings can be
installed on the jointing portion). And then, the locking portion
12 of the sealing valve 1 is to lock onto the hole 22 on the upper
cap 20 via the concave portion 13, thus the sealing valve is to be
jointed to the upper cap 20. In FIG. 2, since the vacuum container
2 is not under the vacuuming process, the vertical length H1 of the
sealing valve 1 is larger than the vertical length H2, and the
inner surface 14 of the cap body 10 is of arc shape, hiatus is
found between the sealing valve 1 and the upper cap 20.
[0022] As shown in FIG. 3, before the manual vacuum pump 3 proceeds
to vacuum the vacuum container 2, the head portion 30 of the vacuum
pump 3 needs to flatly attach to the concave portion 21 of the
upper cap 20 and cover therein the sealing valve 1; and then when
the vacuuming process goes on, the cap body 10 of the sealing valve
1 is to be deflected and deformed because of the airflow (please
refer to the arrow sign in FIG. 3), thus the air hole 23 of the
upper cap 20 is to be opened. Not until the pressure difference
between the interior and exterior of the vacuum container 2 has
reached the predetermined value, does the vacuuming process come to
a halt, so that the cap body 10 is to flatly attach onto the
concave portion 21 of the upper cap 20 because of the pressure
difference, thus the air hole 23 is to be automatically closed,
please refer to FIG. 4, thus achieving the object of sealing the
vacuum container 2. If for the long-term preservation, one more cap
can be additionally installed at the concave portion 21 and apply
the epoxy resin thereon for long-term preservation.
[0023] Although the present invention has been described in
considerable detail with reference to certain preferred embodiments
thereof, those skilled in the art can easily understand that all
kinds of alterations and changes can be made within the spirit and
scope of the appended claims. Therefore, the spirit and scope of
the appended claims should not be limited to the description of the
preferred embodiments contained herein.
* * * * *