AIRTIGHT CONTAINER
An airtight container comprises a receiver, a cover and a sealing ring. The cover comprises an opening. The sealing ring is used to block a gap between the cover and the receiver when the cover is used for closing or sealing an inlet of the receiver. A valve part is used to close or seal the opening. The valve part comprises a tunnel and a valve to close or seal the tunnel. The valve extends from the valve part into the tunnel and has a thickness decreasing from the valve part to a center of the tunnel so as to form a concave surface at a side of the valve facing away from the tunnel. The valve can be opened by air leaving the receiver.
1. Field of Invention
The present invention relates to an airtight container, and more particularly, to an airtight container comprising a check valve for allowing air or gas in the airtight container to vent out from the airtight container and preventing air or gas outside the airtight container from entering the airtight container.
2. Related Prior Art
Airtight containers or bags are often used to contain food or any other things that are prone to rot and had better be isolated from air. Since conventional airtight containers or bags perform well regarding air isolation and are usually inexpensive, they are popularly used in our daily life.
However, ordinary airtight containers or bags do not allow air to vent out or get in, and therefore are not suitable for containing some sorts of food such as coffee beans and/or powder. Coffee beans and powder naturally release carbon dioxide after they are baked. If baked coffee beans and/or powder are contained in an ordinary airtight container or bag, the ordinary airtight container or bag would be expanded by inner pressure due to carbon dioxide released from the contained coffee beans and/or powder. As a result, the expanded ordinary airtight container or bag is usually deformed, or in the worst case, is burst by extreme inner pressure. Especially, release of carbon dioxide from coffee powder, which is made by grinding the coffee beans, is even faster than the coffee beans. Hence, expansion and deformation of the ordinary airtight container or bag containing coffee powder would be even worse due to the faster release of carbon dioxide.
Hence, coffee beans or powder are often contained in airtight containers or bags equipped with check valves. The check valves allow carbon dioxide released from the coffee beans and/or powder to leave the airtight containers or bags so that the airtight containers or bags are protected from extreme expansion and deformation. Besides, the check valves further function for preventing air outside the airtight containers or bags from entering the airtight containers or bags so as to avoid rapid deteriorating of the quality of the coffee beans or powder. In order to achieve the above function, the check valves are usually made as a complicated structure and include a lot of small separate parts to be assembled. As a result, airtight containers or bags having check valves are usually difficult to be made and are expensive than ordinary airtight containers or bags.
The present invention is therefore intended to solve or obviate the problems encountered in conventional airtight containers or bags.
The present invention will be described via detailed illustrations of the preferred embodiment referring to drawings as follows.
Referring to
Referring to
The sealing ring 8 is made according to a shape of the annular edge 12 and the annular groove 16 so that the sealing ring 8 is capable of being placed in the annular groove 16 in advance before the cover 10 is used to cover the inlet of the receiver 4. The sealing ring 8 is made of plastics, silicone, rubber or any other proper material.
Referring further to
Referring to FIGS. 5 and 5A-5C, the valve part 20 further comprises a tunnel 30 defined at a center of the valve part 20 and extending through the valve part 20 from a side of the valve part 20 having the upper portion 24 toward the other side of the valve part 20 having the lower portion 26. The tunnel 30 is defined in the valve part 20 to extend through the valve part 20 as an air passageway, and is formed as a columnar shape at an end thereof extending in the upper portion 24 and is formed as a semispherical shape at the other end thereof extending in the lower portion 26. A valve 32 is formed at the other end of the tunnel 30 near the other side of the valve part 20 having the lower portion 26. The valve 32 extends from the lower portion 26 of the valve part 20 into the tunnel 30 in order to completely close or seal the other end of the tunnel 30. In the preferred embodiment of the present invention, a side of the valve 32 facing the tunnel 30 is defined as a flat surface or a convex surface having a bump formed at a center of the valve 32. The other side of the valve 32 facing away the tunnel 30 is shaped as a triangular prism concave surface as shown in
In assembly, the valve part 20 is firstly placed at the opening 15 of the cover 10 to close or seal the opening 15 for the airtight purpose. The lower portion 26 of the valve part 20 is inserted and squeezed through the opening 15 by force because of the valve part 20 is made of an elastic material. The surrounding edges of the opening 15 are located in the annular trench 28 after the lower portion 26 of the valve part 20 passes through the opening 15. Thus, the surrounding edges of the opening 15 of the cover 10 are substantially sandwiched between the upper portion 24 and the lower portion 26 due to their larger sizes than the opening 15. Hence, the cover 10 is capable of performing the airtight purpose right after the valve part 20 covers the opening 15 of the cover 10.
The sealing ring 8 is fit in the annular groove 16. Thus, the sealing ring 8 is detachably installed to the cover 10.
The receiver 4 can be used to contain coffee beans, powder, pickles or any other types of food that release various types of gas. The cover 10 is used to cover or close the receiver 4 after food is received therein. The sealing ring 8 is engaged with the annular edge 12 when the cover 10 closes and seals the inlet of the receiver 4. The plurality of hooks 18 are engaged with the annular flange 14 so that the sealing ring 8 is firmly engaged with the annular edge 12 due to its flexibility. Accordingly, it is difficult for air to travel through the receiver 4 and the cover 10.
As mentioned earlier, carbon dioxide will be released from the received coffee beans, powder or pickles in the receiver 4. Referring to
The present invention has been described via the detailed illustration of the preferred embodiment. Those skilled in the art can derive variations from the preferred embodiment without departing from the scope of the present invention. Therefore, the preferred embodiment shall not limit the scope of the present invention defined in the claims.
Claims
1. An airtight container comprising:
- a receiver defining a space therein for receiving and an inlet for entry of the space;
- a cover used to close the inlet of the receiver, the cover comprising an opening to spatially communicate the space of the receiver with an outside of the container; and
- a valve part used to close the opening of the cover, and comprising a tunnel formed therein to extend through the valve part for spatially communicating the space of the receiver with the outside of the container, and a valve extending from the valve part into the tunnel so as to close the tunnel at a center of the tunnel, a thickness of the valve defined along an extending direction of the tunnel decreasing from the valve part toward the center of the tunnel so as to form a concave surface at a side of the valve facing away from the tunnel.
2. The airtight container according to claim 1, wherein the concave surface of the valve is a triangular prism concave surface.
3. The airtight container according to claim 1, wherein another side of the valve facing the funnel is formed as a selective one of the group consisting of a flat surface and a convex surface.
4. The airtight container according to claim 1, wherein the cover comprises an upper portion, a lower portion and a trench formed between the upper portion and the lower portion, a size of the upper portion and a size of lower portion are both larger than a size of the opening of the cover.
5. The airtight container according to claim 1, wherein the valve is formed by at least three divided sections.
6. The airtight container according to claim 5, wherein the valve is formed by four divided sections, two of the four sections are opposite to each other and spaced from each other while the other two sections are opposite to each other and engaged with each other at a center of the valve.
7. The airtight container according to claim 6, wherein a linear slit is formed at the center of the valve between the two engaged sections of the valve.
8. The airtight container according to claim 1, wherein the valve is made by a material same as the valve part.
9. The airtight container according to claim 8, wherein the valve part is made of one of plastics, silicone, rubber, thermoplastic rubber (TPR) and polyethylene (PE).
Type: Application
Filed: Aug 27, 2013
Publication Date: Mar 5, 2015
Inventor: CHENG SHENG WU (Taipei City)
Application Number: 14/011,751
International Classification: B65D 51/16 (20060101); B65D 53/02 (20060101);