Patent ID: 6120006
Filing Date: 2000-09-19
Classification: F16J,F16K

Abstract:
A valve device, comprising:a packing container;a valve stem vertically movably inserted in said packing container;a gland packing interposed between said packing container and said valve stem;a packing retainer disposed on said gland packing, said packing retainer having a valve stem through-hole formed therein and a curved surface formed in an upper end portion thereof;a packing flange disposed on said packing retainer so as to contact said curved surface formed in said packing retainer, said packing flange having a valve stem through-hole and a plurality of bolt through-holes formed therein;at least one arched plate spring disposed on a surface of said packing flange opposite said packing retainer, said plate spring extending generally across the length of said packing flange and having a valve stem through-hole and a plurality of bolt through-holes, said plate spring being arched away from said packing flange at its marginal ends when in an uncompressed state; anda plurality of bolt members, each extending through an associated one of said plurality of bolt through-holes formed in said packing flange and said at least one plate spring, for compressing said at least one plate spring into said packing flange to thereby press said packing retainer into said gland packing and press said gland packing against said packing container,wherein the arch of said plate spring causes a compressive force generated by said plate spring to be applied to said packing flange at a location generally adjacent to said valve stem extending through said valve stem through-hole of said packing flange to minimize tilting of said packing flange when said bolt members are tightened against said marginal ends.