Patent ID: 7757725
Filing Date: 2010-07-20
Classification: A47J,B65D

Abstract:
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.