Microwave heating digestion vessel

Details Microwave heating digestion vessel Microwave heating digestion vessel

1989-04-03

1990-06-12

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055E, 220366, 215315, 422 21, 422113, H05B 680

Patent

active

049335294

ABSTRACT:
Microwave digestion vessel of Teflon PFA material including a Teflon PFA vessel with a threaded cap and a threaded adjustable nut with a diaphragm. A valve assembly is formed by a U-shaped hole in the cap, a plunger extending downwardly from the adjustable nut into the U-shaped hole, and the diaphragm extending downwardly into a recess in the adjustable nut. Pressure in the digestion vessel forces the plunger up against the diaphragm to move the plunger upwardly, subsequently releasing pressure through an exhaust hole in the cap.

REFERENCES:
patent: 3143441 (1964-08-01), Coleman et al.
patent: 4113138 (1978-09-01), Fields et al.
patent: 4409454 (1983-10-01), Beauvais et al.
patent: 4490597 (1984-12-01), Mengel
patent: 4613738 (1986-09-01), Saville
patent: 4623076 (1986-11-01), Karpal
patent: 4736083 (1988-05-01), Saville
"Microwave Acid Digestion Bomb", Parr Instrument Company, Jul. 1986.

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