Patent ID: 9199597
Filing Date: 2015-12-01
Classification: B29D,B60R,B65B,B65D,F16K,Y10T

Abstract:
1. A self-adhesive checking valve for filling fluid into a fluid receiving cavity, comprising a first valve film, a second valve film, and a third valve film positioned between said first valve film and said second valve film, wherein a fluid inflating channel is formed between said first valve film and said second valve film, wherein a backflow prevention channel is formed between said second valve film and said third valve film, wherein when said fluid receiving cavity is filled with said fluid through said fluid inflating channel, inner surfaces of said first valve film, said second valve film and said third valve film are attached with each other to prevent said fluid to flow back through said fluid inflating channel so as to release the fluid receiving cavity, wherein said fluid inflating channel is closed and said backflow prevention channel is opened when said fluid receiving cavity is filled with the fluid, wherein in case of leakage, the fluid is selectively guided into said backflow prevention channel to create supplemental air pressure to apply on said second valve film to further seal and close said fluid inflating channel so as to prevent fluid leakage.