Patent ID: 8609044

Claim:
A micro vial assembly for performing microwave-assisted chemical reactions on small volumes, the assemble comprising: a micro-wave transparent reaction vessel having an open upper end and a closed bottom end; a deformable cap having a through hole; a sealing diaphragm; and a sleeve, wherein the sleeve is formed with a through hole, the vessel extending axially through the sleeve, the deformable cap extending over the diaphragm and the sleeve so as to secure the vessel to the sleeve while clamping the diaphragm for sealing the open upper end of the vessel, the open upper end of the vessel being formed with a widening portion, the widening portion being received in a corresponding recess formed in an end plane of the sleeve, and the recess providing a seat for the widening portion in the open upper end of the vessel, wherein an upper end of the sleeve includes a flange for engagement with and for securing the deformable cap to the sleeve, one end of the deformable cap is secured at a perimeter of the upper end of the sleeve and extends over the end plane of the sleeve, and the other end of the deformable cap is crimped for secured engagement with a lower side of the flange, wherein the open end of the vessel is defined by a rim protruding above the upper end of the sleeve, when the vessel is supported in the sleeve, the rim being dimensioned to be depressed in a lower side of the diaphragm, wherein the rim has an inner perimeter extending transversely to the diaphragm, which seals the open end of the vessel, and an exterior perimeter extending continuously transversely to the diaphragm, and wherein the inner perimeter of the rim defines a portion of the vessel cavity having a first radius and a second radius, whereby the first radius portion that meets the second radius portion of the vessel cavity has a reducing radius.