Apparatus for dispensing liquefied gas
AssigneeBOC Limited
InventorBryan K. Smith
Life of this patent
Estimating the term…
Abstract
Apparatus for dispensing metered quantities of liquefied gas such as liquid includes a thermally-insulated reservoir having at its bottom an outlet passage leading to a dispensing orifice outside the thermal insulator. There is a single valve for controlling admission of the liquefied gas to the dispensing orifice. The passage is in heat conductive relationship with a block of heat conductive material in the liquefied gas so as to maintain the passage sufficiently cold to prevent substantial evaporation of liquefied gas within the part of the passage with the reservoir. The valve may be cam or solenoid actuated to dispense drop of liquefied gas of chosen volume.
Claims16
Apparatus for dispensing a cryogenic liquid comprising a thermally insulated reservoir for containing said cryogenic liquid;
- a substantially solid block of heat conductive material disposed in said reservoir and having a passage therethrough with the diameter of said substantially solid block being at least three times greater than the diameter of said passage;
- a first end of said passage adapted to dispense said cryogenic liquid from said reservoir and a second end of said passage disposed at a location in the reservoir spaced away from the thermal insulation thereof;
- and valve means disposed at said second end of said passage for selectively admitting said cryogenic liquid into said passage wherein evaporation of said cryogenic liquid is substantially precluded prior to its discharge from said first end thereof.
Apparatus for dispensing a cryogenic liquid comprising a thermally insulated reservoir for containing said cryogenic liquid and having inner and outer walls and a vacuum therebetween;
- a substantially solid block of heat conductive material disposed entirely within said reservoir and having a passage therethrough with the diameter of said substantially solid block being at least three times greater than the diameter of said passage;
- a first end of said passage communicating with a delivery tube which is adapted to dispense said cryogenic liquid from said reservoir at said outer wall and a second end of said passage disposed at a location in the reservoir spaced away from said inner wall;
- and valve means disposed at said second end of said passage for selectively admitting said crogenic liquid into said passage wherein evaporation of said cryogenic liquid is substantially precluded prior to its discharge from said first end thereof.
Dependencies are inferred from the claim text.