ADSORPTION PUMP Russian patent published in 2003 - IPC

FIELD: cryogenic engineering. SUBSTANCE: pump designed to maintain vacuum by absorbing gas molecules from enclosed spaces has double-wall tank, adsorbent, multilayer vacuum-type heat insulation, and evacuation valve. Pump is also provided with safety device made in the form of sleeve with slots on side walls which is installed at evacuation valve inlet directly in front of insulation layers. Slots are tangential to upper insulation layer. Proposed design of pump provides for eliminating damage to heat insulation by jet of pumped-out gas. EFFECT: enhanced efficiency of heat insulation. 1 dwg