IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0528746
(2006-09-28)
|
등록번호 |
US-7757725
(2010-08-09)
|
발명자
/ 주소 |
- Wang, Kuo-Liang
- Lin, Wei-Ching
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
6 |
초록
▼
A manual vacuum device is introduced to provide vacuum isolation in a container. The manual vacuum device comprises a lower cover disposed on the container and an upper cover rotatably disposed on the lower cover to form a first air chamber. The lower cover includes a first air channel fluidly commu
A manual vacuum device is introduced to provide vacuum isolation in a container. The manual vacuum device comprises a lower cover disposed on the container and an upper cover rotatably disposed on the lower cover to form a first air chamber. The lower cover includes a first air channel fluidly communicating the container with the first air chamber and a first check valve disposed within the first air channel to prevent air from flowing back to the container. The upper cover includes a second air channel fluidly communicating the first air chamber with the external environment and a second check valve disposed within the second air channel to prevent air in the external environment from flowing back to the first air chamber. The air in the container exhausts to the external environment by the rotational movement of the upper cover relative to the lower cover.
대표청구항
▼
What is claimed is: 1. A manual vacuum device adapted to provide vacuum isolation in a container, comprising: a lower cover disposed on the container and comprising a first cavity and a first separating body arranged in the first cavity, the first separating body comprising a first air channel flui
What is claimed is: 1. A manual vacuum device adapted to provide vacuum isolation in a container, comprising: a lower cover disposed on the container and comprising a first cavity and a first separating body arranged in the first cavity, the first separating body comprising a first air channel fluidly communicating with the container and a first check valve disposed within the first air channel to prevent air from flowing into the container; and an upper cover comprising a second cavity and a second separating body arranged in the second cavity and rotatably disposed on the lower cover to form a first air chamber defined by the first and second separating bodies, the second separating body comprising a second air channel fluidly communicating the first air chamber with the external environment and a second check valve disposed within the second air channel to prevent air from flowing into the first air chamber from the external environment; wherein the air in the container flows into the first air chamber through the first air channel as the first air chamber expands by a rotational movement of the second separating body of the upper cover relative to the first separating body of the lower cover, and the air in the first air chamber flows to the external environment through the second air channel as the first air chamber contracts by a counter rotational movement of the second separating body of the upper body relative to the first separating body of the lower cover. 2. The manual vacuum device according to claim 1, wherein the first and second separating bodies further define a second air chamber as the upper cover is rotatably disposed on the lower cover, the first separating body further comprises a third air channel fluidly communicating the container with the second air chamber and a third check valve disposed within the third air channel to prevent air from flowing into the container from the second air chamber, and the second separating body further comprises a fourth air channel fluidly communicating the second air chamber with the external environment and a fourth check valve disposed within the fourth air channel to prevent air from flowing to the second air chamber from the external environment. 3. The manual vacuum device according to claim 2, wherein the air in the container flows into the second air chamber through the third air channel as the second air chamber expands by a rotational movement of the second separating body of the upper body relative to the first separating body of the lower cover, and the air in the second air chamber flows to the external environment through the fourth air channel as the second air chamber contracts by a counter rotational movement of the second separating body of the upper body relative to the first separating body of the lower cover. 4. The manual vacuum device according to claim 1, wherein the lower cover further includes a cannular shaft linked to the container to receive a safety valve, the upper cover further includes an opening corresponding to the cannular shaft, and the safety valve is closed to fluidly separate the container from the external environment under normal conditions and is opened to fluidly communicate the container with the external environment when a difference between the atmospheric pressure outside the container and the vacuum pressure inside the container exceeds a predetermined value. 5. The manual vacuum device according to claim 4, wherein at least one inner-side groove is formed on the inner wall of the cannular shaft, the safety valve includes a rod having at least one outer-side groove on the wall thereof and a biasing element arranged to bias the rod, such that the outer-side groove is thoroughly contained in the cannular shaft to fluidly separate the container from the cannular shaft in the normal condition, and if the pressure difference exceeds the predetermined value, the rod of the safety valve will be pressed against the biasing element until the outer-side groove fluidly communicates the cannular shaft with the container, such that the air in the external environment flows through the inner-side groove into the cannular shaft, and then into the container through the outer-side groove to decrease the pressure difference. 6. The manual vacuum device according to claim 5, wherein the safety valve further includes a stepped-shaped lower cap fixed to an end of the rod, the lower cover further includes a stepped portion corresponding to the stepped-shaped lower cap, and the stepped-shaped lower cap engages with the stepped portion under normal conditions to fluidly separate the container from the cannular shaft. 7. The manual vacuum device according to claim 6, wherein the safety valve further includes an elastic pad arranged on the lower cap to improve the engagement between the lower cap and the stepped portion of the lower cover. 8. The manual vacuum device according to claim 4, wherein the safety valve includes a hollow tube disposed in the cannular shaft, a lower cap fixed to the hollow tube and having a first air passage to fluidly communicate the container with the hollow tube, an upper cap disposed on the hollow tube and having a second air passage to fluidly communicate the hollow tube with the external environment, a biasing element arranged on the lower cap and in the hollow tube and a plug disposed on the biasing element to be biased by the biasing element to close an inlet of the second air passage to fluidly separate the hollow tube from the external environment in the normal condition, and if the pressure difference exceeds the predetermined value, the plug of the safety valve will be pressed downward against the biasing element, such that the air in the external environment flows through the second air passage into the hollow tube, and then into the container through the first air passage to decrease the pressure difference. 9. The manual vacuum device according to claim 8, wherein a tail groove is formed at one end of the cannular shaft corresponding to the opening, the hollow tube has at least one orifice on the wall thereof, the upper cover has at least one lower-side groove on a surface corresponding to the upper cover, and as the upper cover is lifted relative to the lower cover, the safety valve is also lifted to fluidly communicate the orifice with the tail groove, such that the air in the external environment flows into the hollow tube through the lower-side groove, tail groove and the orifice, and then into the container through the first air passage. 10. The manual vacuum device according to claim 1, wherein the container includes a leakage groove fluidly communicating with the inside of the container and the lower cover further includes a release portion linked to the external environment and corresponding to the leakage groove, and wherein the lower cover is rotatable relative to the container to fluidly communicate the leakage groove with the release portion, such that the air in the external environment flows through the release portion and the leakage groove into the container. 11. A manual vacuum device adapted to provide vacuum isolation in a container, comprising: an air faucet, in combination with the container, including a first air channel fluidly communicating with the container and having a first check valve therein to prevent air from flowing back to the container; a lower cover disposed on the air faucet and comprising a first cavity and a first separating body arranged in the first cavity, the first separating body comprising a second air channel fluidly communicating with the first air channel and a second check valve disposed within the second air channel to prevent air from flowing back to the first air channel; and an upper cover comprising a second cavity and a second separating body arranged in the second cavity and rotatably disposed on the lower cover to form a first air chamber defined by the first and second separating bodies, the second separating body comprising a third air channel fluidly communicating the first air chamber with the external environment and a third check valve disposed within the third air channel to prevent air from flowing back to the first air chamber from the external environment; wherein the air in the container flows into the first air chamber through the first and second air channels as the first air chamber expands by a rotational movement of the second separating body of the upper body relative to the first separating body of the lower cover, and the air in the first air chamber flows to the external environment through the third air channel as the first air chamber contracts by a counter rotational movement of the second separating body of the upper body relative to the first separating body of the lower cover. 12. The manual vacuum device according to claim 11, wherein the air faucet is combined with the container by a fastening device. 13. The manual vacuum device according to claim 11, wherein a filter is disposed at an end of the first air channel corresponding to the container.
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