초록 ▼

A system for dispensing a cryogen such as liquid nitrogen. The system employs two vessels containing the liquid cryogen. One serves as a pressure vessel and the other as a storage vessel. Liquid from the pressure vessel is vaporized in a ballast chamber exposed to ambient temperature, resulting in p

A system for dispensing a cryogen such as liquid nitrogen. The system employs two vessels containing the liquid cryogen. One serves as a pressure vessel and the other as a storage vessel. Liquid from the pressure vessel is vaporized in a ballast chamber exposed to ambient temperature, resulting in pressurized refrigerant gas. A valve selectively admits the pressurized gas into the liquid storage vessel, causing the stored liquid to be dispensed at a selected site.

대표청구항 ▼

A system for dispensing a liquid which comprises: a pressure vessel; a pressurizing liquid having a boiling point below ambient temperature contained within said pressure vessel and defining a vapor space thereabove; a ballast chamber having its interior in heat transfer relationship with the ambien

A system for dispensing a liquid which comprises: a pressure vessel; a pressurizing liquid having a boiling point below ambient temperature contained within said pressure vessel and defining a vapor space thereabove; a ballast chamber having its interior in heat transfer relationship with the ambient atmosphere; a transfer conduit having a first end positioned within said pressure vessel below the normal level of pressurizing liquid therein and a second end positioned in said ballast chamber; a supply vessel containing therein a quantity of liquid to be dispensed; a liquid dispensing line having a first end positioned within said supply vessel below the normal level of liquid therein and a second, discharge, end at a liquid utilizatioon device; and means for selectively interconnecting the interior of said ballast chamber with the interior of said supply vessel to pressurize said supply vessel and dispense said liquid therefrom.