Corrosion-resistant, quick disconnecting coupling assembly for piping use

A corrosion-resistant, quick disconnecting coupling assembly for piping use consisting of a female coupling means and a male coupling means for causing or stopping the conduction of a fluid by connection or disconnection between both, in which assembly:

• said female coupling means comprises an exterior female body and, first means defining a first fluid path therethrough, a cylindrical first valve means mounted in said female body for forming an enclosure by and between said female body and said first valve means thereby to define a first annular closed chamber on a first side of said first valve means and an open cavity on a second side of said first valve means and second means for isolating said first annular chamber from said first fluid path, said first valve means comprising a first hollow cylindrical portion defining a part of said first fluid path and having a first top closure end and a first separable partition means extending radially outwardly from said first closure end for normally blocking fluid flow, and having, through said first cylindrical portion, a first transverse hole and a first longitudinal hole serving each as a path of fluid flow and communicating with each other, at least a portion of said first separable partition means of said first valve means being slidingly movable to separate from a remaining portion to allow fluid to flow, said first transverse hole being a part of said first fluid path and located adjacent said separable partition means of said first valve means between said open cavity and said first hollow cylindrical portion, and a first spring housed in said first annular closed chamber, axially extending between said movable portion of said first separable partition means and said female body so as to be compressible or extensible thereby to enable said first transverse hole to open or close upon compression or extension of said first spring, said second means thereby isolating said first spring from said fluid path;
• and
• said male coupling means comprises an exterior male body having an elongted fit cylindrical portion thereon and third means defining a second fluid path therethrough, a cylindrical second valve member mounted in said male body so as to form an enclosure by and between the male body and said second valve means thereby to define a second annular closed chamber and fourth means for isolating said second annular chamber from said second fluid path, said second valve means consisting of a second hollow cylindrical portion having a second top closure end and a second separable partition means extending radially outwardly from said second closure end, and having, through said second cylindrical portion, a second transverse hole and a second longitudinal hole serving each as a path of fluid flow and communicating with each other, at least said second partition means of said second valve means being slidingly movable,
• said second transverse hole being located adjacent said second partition means, and a second spring housed in said second annular chamber, extending axially between said second partition means and said male body so as to be compressible or extensible thereby to enable said second transverse hole to open or close upon compression or extension of said second spring, said fourth means thereby isolating said second spring from said fluid path,
• whereby when said female coupling means and said male coupling means are connected to each other, said fit cylindrical portion of said male body is received and fitted in said open cavity of said female body in a telescopic manner, said movable portions of said first and second partition means being both moved in their respective bodies up to the compression limit positions of said first and second springs, said first and second top closure ends being in abutment with each other, and said first and second transverse and said first and second longitudinal holes are put in communication with one another.