Fluid injector assembly
AssigneeJanis Research Company, Inc.
InventorTerence W. Nixon
Life of this patent
Estimating the term…
Abstract
A quick disconnect fluid injection assembly for delivering a cryogenic fluid into a container is disclosed. A passage, having an entrance and an exit, provides access to the inside of the container. A pre-valve adjacent to the entrance blocks the passage to exclude dirt and debris and a fluid check valve adjacent to the exit prevents backflow of fluid from the container through the passage. In use, an elongated injector is inserted into the passage. The injector first opens the pre-valve and then the fluid check valve and thereafter injects cryogenic fluid through the check valve into the container.
Claims17
A fluid injection assembly comprising a valve assembly including
- means defining a fluid passage having an entrance end and an exit end,
- a fluid check valve adjacent to the passage exit end for preventing fluid backflow through said passage, and
- passage blocking means including
- a valve member adjacent to the entrance end of said passage, said valve member being movable between a closed position wherein said valve member blocks said passage and an open position wherein said valve member is substantially clear of said passage, and
- means for biasing the valve member to its closed position so that when an elongated fluid injector is inserted into said passage through the entrance end thereof to engage said check valve, the injector will move said valve member to its open position and bypass said passage blocking means before engaging the check valve.
An injection assembly, comprising:
- a valve assembly including
- means defining an axial fluid passage having an entrance end, an exit end and a longitudinal axis therebetween;
- valve means in said passage defining means proximate to the exit end of said passage, said valve means including
- means defining a valve seat in said passage, a valve member positioned in said passage between the valve seat and the passage exit end and movable along said passage between a closed position wherein said valve member seats on and provides a fluid tight seal with said valve seat and an open position wherein said valve member is spaced from said valve seat, and means for biasing said valve member toward its closed position;
- and
- passage blocking means located along said passage defining means between the passage entrance end and said valve means, said blocking means including
- means defining a seat, said seat having at least a portion thereof located in said passage,
- a passage blocking member movable along a second axis disposed at a selected angle to said passage axis between a closed position wherein said blocking member seats on said seat blocking said passage, and
- an open position wherein said blocking member is substantially removed from said passage;
- and
- elongated tubular fluid injection means for insertion into said passage, said injection means having a head for connection to a fluid source and a tip, said injector means, upon being inserted in said passage, being arranged and adapted to move said blocking member to its open position so that said injection means tip can push past said blocking member and engage and unseat the valve member.
Dependencies are inferred from the claim text.