Patent ID: 7392972

Claim:
A ceramic valve structure, comprising: a ceramic valve body, having a containment slot on a top thereof; a valve shaft base, being placed inside said containment slot and being rotatable, said valve shaft base having a valve shaft slot; a valve shaft with a bottom thereof placed inside said valve shaft slot, a top of said valve shaft being a swing end; a slow-descending device, being placed between said swing end and said valve shaft base, said slow-descending device comprising: a piston slot, being placed on one side of said valve shaft base, a bottom of a venthole being connected to a bottom of said valve shaft base, and a sealer, being placed on a top of the venthole of said piston slot, said venthole being sealable; and a piston, having a bottom thereof placed inside said piston slot in a sealed condition, a joint being connected to a pre-determined area on a swing end of a valve stick.