Apparatus for making an injection or sampling site
AssigneeMinnesota Mining and Manufacturing Company
InventorsBrett A. Behnke, Gary A. Thill
Life of this patent
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Abstract
A method of making an injection and sampling site adapted to receive a blunt cannula. The method comprises providing an elastomeric septum, and a housing adapted to receive that septum; making a slit in the elastomeric septum; inserting the elastomeric septum into the passageway of the housing; and swaging an outer annular ledge on the housing inwardly over the septum until a septum-engaging portion of the swaging tool applies a predetermined amount of force to the septum. Before the swaging step, a pin is inserted into the passageway of the housing against the inside end of the septum to inhibit deformation of the septum during swaging.
Claims17
Apparatus for fabricating an injection or sampling site comprising a housing having an outside end and a passageway extending inwardly from the outside end, the passageway opening through the outside end, and an elastomeric septum in the passageway of the housing, the septum having an outside end corresponding to the outside end of the housing and an inside end opposite the outside end;
- the apparatus comprising:
- swaging means for swaging the outside end of the housing inwardly over the septum;
- pin means for reducing or preventing expansion of the septum inwardly through the passageway when the outer end of the housing is swaged, the pin means being inserted into the passageway of the housing into engagement with the inside end of the septum during the swaging process;
- and
- means for stopping the swaging means from further swaging of the housing when the swaging means applies a predetermined amount of force to the septum.
Apparatus for cutting a slit into an elastomeric septum which is to be positioned in a passageway of a housing in an injection or sampling site to seal the passageway of the housing and to sealingly receive a blunt cannula, the apparatus comprising:
- a block having a septum-receiving bore for receiving a septum before it is inserted into a housing and laterally constraining the septum against lateral deformation;
- a back support for supporting one end of a septum received in the septum-receiving bore of the block;
- a knife movable relative to the septum-receiving bore of the block to cut a slit into a septum received in the septum-receiving bore;
- and
- pushing means for removing a septum from the septum-receiving bore and inserting the septum into the passageway of a housing.
Dependencies are inferred from the claim text.