The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2003
Filed:
Apr. 30, 2001
Yoshihiro Koyanagi, Kashiwara, JP;
Kabushiki Kaisha Kashiwara Seitai, Osaka, JP;
Abstract
The present invention relates to a shut-off valve of limiting flow to a single direction, and a shut-off valve of removing air from the sack and charging the sack with air as well. The shut-off valve has an air passage of a flat and substantially cylindrical form in cross section, which is formed by opposed cladding sheets. The cladding sheet is provided with a valve body sheet which comprises a fixed part attached to the cladding sheet and flap portions with the fixed part placed in the central position therebetween, which flap portions are movable in a vertical direction. One flap portion serves to prevent air from flowing in one direction within the air passage by the close contact with cladding sheet, while the other flap portion serves to prevent air from flowing in the other direction by the close contact with the cladding sheetu The shut-off valve may perform a double function of removing air from the sack and charging the sack with air accordingly.