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US 11,767,938 B2Granted
Compression nut or fitting with removable plunger for easily dislodging stuck ferrules
AssigneeThermo Finnigan LLC
InventorsGeorge B. Guckenberger, Adam D. Bryant
Life of this patent
Estimating the term…
Abstract
A compression fitting includes a nut with a threaded end for receiving a threaded tube and a receiving end for holding a plunger head; and a plunger with an inner bore for receiving a capillary tube and the plunger head for engaging a ferrule positioned within the receiving end between the plunger head and the threaded tube, the plunger slidingly engaged with the nut to force the ferrule from the nut.
Claims15
A compression fitting, comprising:
- a nut with a threaded end for receiving a threaded tube and a receiving end for holding a plunger head, wherein the nut includes a spring to bias the plunger towards a proximal end of the nut;
- and
- a plunger with an inner bore for receiving a capillary tube and the plunger head for engaging a ferrule positioned within the receiving end between the plunger head and the threaded tube, the plunger slidingly engaged with the nut and translatable until the plunger head extends past the threaded end of the nut to force the ferrule from the nut, wherein the plunger head includes a tapered ferrule engagement surface.
A method of operating a compression fitting, comprising:
- biasing a plunger towards a threaded end of a nut with a spring, the nut including the threaded end for threadingly engaging a threaded tube and a receiving end for holding a plunger head of a plunger and a ferrule compressed between the plunger head and the threaded tube, the nut further including a spring-loaded portion, the spring positioned within the spring-loaded portion;
- disengaging the nut and the threaded tube;
- and
- translating the plunger axially relative to the nut to dislodge the ferrule stuck within the nut or to the plunger head, wherein translating the plunger includes translating the plunger until the plunger head extends past the threaded end of the nut.
1 more element
Dependencies are inferred from the claim text.