Abstract: In the pumping element of a cryogenic sorption pump, a sorbent material is accommodated in annular spaces between heat conductor shells and porous screen shells, with the shells being attached to the cover of a cryogenic agent vessel so as to make good thermal contact therewith.

Abstract: A cryogenic sorption pump comprises a housing complete with a cover, a bottom, and an inlet nozzle, and, a vessel for cryogenic agent, designed in the form of two shells installed in the central part of the pump one over the other and interconnected by a circular element. The cryogenic agnet vessel is provided with a heat conductor encompassing the upper shell and forming an interspace therewith, wherein is installed a gas-permeable screen. Between the heat conductor and the gas-permeable screen is located an adsorbent. The pump contains a vacuum conductor arranged within the space of the cryogenic agent vessel and provided with heat conductors attached to the vacuum conductor and installed inside the shells, respectively, throughout their length. The ends of the vacuum conductor are provided with heat bridges, respectively, and taken out of the housing through the bottom. The pump is also provided with pipes and for filling in cryogenic agent and removing cryogenic agent vepors, respectively.

Abstract: A cryogenic sorption pump including a pumping element complete with a vessel for a lower temperature cryogenic agent, a radiation screen encompassing the pumping element, a pipe, and a heat bridge. The radiation screen incorporates a vessel for a higher temperature cryogenic agent, a shell having its lower end connected to said vessel and its upper end, to the pump housing, and a chevron screen. The heat bridge is installed between the shell and the pumping element and has its upper end connected to the shell and its lower end to the vessel of the pumping element. The pipe passes within the space defined by the inner walls of the vessels and has its lower end connected to the bottom of the housing and its upper end to the vessel of the pumping element.

Abstract: The cryogenic condensation pump comprises a housing (3), accommodating a vessel (3) for a cryoagent, namely liquid nitrogen, a shell heat line and a chevron baffle which make up a radiation shield, and a pump-out element. The cryoagent vessel and pump-out element are provided with suspension pipes. Each of the suspension pipes is provided with assemblies, for joining it to the housing, and assemblies for joining it to the cryoagent vessel and the pump-out element.The suspension pipe of the pump-out element is provided with a support bush, and in the cover of the cryoagent vessel an annular element is secured which makes contact with the support bush. The pump housing, radiation shield and pump-out element are made of metals having low specific weight.