초록 ▼

Microwave digestion vessel of Teflon PFA material including a Teflon PFA vessel with a threaded top and a Teflon PFA cap with internal threads for engaging the vessel threads. A valve assembly extends upwardly from a center portion of the cap and includes a valve seat, a valve ball internal thereto,

Microwave digestion vessel of Teflon PFA material including a Teflon PFA vessel with a threaded top and a Teflon PFA cap with internal threads for engaging the vessel threads. A valve assembly extends upwardly from a center portion of the cap and includes a valve seat, a valve ball internal thereto, a Teflon spring uniquely configured and a valve cap holding the spring and ball into the ball seat of the valve seat. An exhaust hole is provided out one side of the valve cap. The vessel includes a flange for encompassing a lower portion of the cap for pressure expansion protection. A ring with an adjoining flange is also provided for the cap to provide for pressure expansion protection.

대표청구항 ▼

A microwave heating digestion vessel for use in a microwave oven during a microwave heating digestion of a material comprising: a. molded threaded vessel and mating molded threaded lid for covering said vessel, said vessel and said lid being transparent to microwave energy; b. valve assembly affixed

A microwave heating digestion vessel for use in a microwave oven during a microwave heating digestion of a material comprising: a. molded threaded vessel and mating molded threaded lid for covering said vessel, said vessel and said lid being transparent to microwave energy; b. valve assembly affixed to the top of said lid, said valve assembly including a ball seat with a vent opening disposed in said lid, a hollow cylindrical stem including a threaded outer portion, said cylindrical stem supporting a spring assembly therein and affixed to said lid about said ball seat, a flat positive planar stop surface at the top of said cylindrical stem and a valve cap including a threaded inner portion and an interior flat planar stop surface, said threaded valve cap covering said cylindrical stem and retaining said spring assembly, said spring assembly acting on top of and against a ball mating in said ball seat, wherein said spring assembly comprising two opposing open cylindrical sections, a section of a spiral spring between said cylindrical sections, and a plurality of spacing nipples extending outwardly from said open cylindrical sections and said spring section providing for passage of pressure and vapors about said cylindrical and spring sections; and c. venting hole means disposed in said valve cap for exhausting pressure, vapors and liquid from said vessel.