DE1736638U - PUMP FOR CONVEYING LOW TEMPERATURE LIQUID GASES. - Google Patents

Description

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M.M. Wirfh /:Dr.W.Scha!k,.

Dip! .- Ing, Peter Wirth
Dip! .-! Ng. G. Dannenberg / l

Dr. V. Schmied - Kowamk fc A. 8 2 5 3 1 4 * 1 M 1 ζβ ■ A ^ fö Frankfurt a. Main ■ «I .. !!. DO-v / -

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Claims (3)

EA.625314 * H Protection claims: 1. Pump for pumping gases liquefied at low temperature with a boiling point of 273 ° K (absolute temperature) by means of a pump whose hollow lower pump piston is provided with a control valve at the lower end and with outlet channels at the upper end and reciprocating within a is arranged lower chamber of the cylinder, which is provided at its lower end with a check valve and at its upper end with an outlet channel, the attached at the upper end of the piston, in turn in an upper chamber of the cylinder as a piston v / acting piston rod in one is guided inside the narrowed part of the cylinder and leads through a packing located therein to the outer, reciprocating drive means, and furthermore, preferably surrounding the lower chamber, a supply chamber for liquefied gases is provided, characterized in that a leakage device ( Leak ring 55), which in a known manner in the wall of the lower Cylinder part is provided and collects leakage liquid or gas and supplies via coupling and connecting elements (56) to the supply chamber (70,73) of the pump, is arranged within the stroke area of the hollow piston (16a) in such a way that it is always between during its stroke located at its ends, drains leakage liquid coming from the lower and νση -der upper pump chamber and keeps the latter away from the lower pump chamber, leakage liquid coming from above and arising from gas. 2. Device according to claim 1, characterized in that that also the upper part of the cylinder with a leakage device (Leak ring 57) for collecting leakage liquid or gas is, by coupling and connecting means (58,59) with is connected to the interior of the supply chamber (70 »73), which is connected by keeps leakage liquid coming from the upper pump chamber away from the packing (21) of the piston rod (16b). 3. Device according to claim 1 or 2, wherein the! Deck device having cylinder part with a carbon lining is provided, characterized in that the leakage device (55 or 57) is attached between the opposite ends of separate sections of this liner. The Pa1 π φ nt a attorney: .f.