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US 5,351,383 AGranted
Method of making an injection or sampling site
AssigneeMinnesota Mining and Manufacturing Company
InventorsBrett A. Behnke, Gary A. Thill
Life of this patent
Estimating the term…
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.
Claims54
A method of fabricating an injection or sampling site adapted to receive a blunt cannula, the method comprising the steps of:
- providing a housing having an outside end and a passageway extending inwardly from the outside end, the passageway opening through the outside end and defining a longitudinal direction;
- providing an elastomeric septum having an outside end corresponding to the outside end of the housing and an inside end opposite its outside end;
- inserting the elastomeric septum into the passageway of the housing;
- inserting a pin into the passageway of the housing to engage the inside end of the septum to reduce or prevent expansion of the septum inwardly through the passageway when the outer end of the housing is swaged;
- and
- during or after the step of inserting the pin, swaging the outside end of the housing inwardly over the septum with a swaging tool.
3 more elements
A method of fabricating an injection or sampling site adapted to receive a blunt cannula, the method comprising the steps of:
- providing a housing having an outside end and a passageway extending inwardly from the outside end, the passageway opening through the outside end and defining a longitudinal direction;
- inserting an elastomeric septum into the passageway of the housing;
- swaging the outside end of the housing inwardly over the septum with a swaging tool, the swaging tool having a septum-engaging portion configured for directly engaging the septum before the swaged outside end of the housing applies longitudinal compression to the septum;
- during the step of swaging the outside end of the housing inwardly over the septum with a swaging tool, directly engaging the septum with the septum-engaging portion of the swaging tool;
- and
- during he step of directly engaging the septum with the septum-engaging portion of the swain tool and before the swaged outside end of the housing applies longitudinal compression to the septum, stopping the swaging process when the swaging tool applies a predetermined amount of force to the septum at the location where the septum-engaging portion of the swaging tool is engaging the septum.
3 more elements
A method of fabricating an injection or sampling site adapted to receive a blunt cannula, the method comprising the steps of:
- providing a housing having an outside end and a passageway extending inwardly from the outside end, the passageway opening through the outside end and defining a longitudinal direction;
- inserting an elastomeric septum into 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 of the septum;
- swaging the outside end of the housing inwardly over the septum with a swaging tool, the swaging tool having a septum-engaging portion configured for directly engaging the septum before the swaged outside end of the housing applies longitudinal compression to the septum;
- before or during the step of swaging the outer end of the housing, inserting a pin into the passageway of the housing to engage the inside end of the septum to reduce or prevent expansion of the septum inwardly through the passageway when the outer end of the housing is swaged;
- and
- stopping the swaging process when the swaging tool applies a predetermined amount of force to the septum at the location where the septum-engaging portion of the swain tool is engaging the septum.
3 more elements
A method of fabricating an injection or sampling site adapted to receive a blunt cannula, the method comprising the steps of:
- providing a housing having an outside end and a passageway extending inwardly from the outside end, the passageway opening through the outside end and defining a longitudinal direction;
- inserting an elastomeric septum into the passageway of the housing;
- swaging the outside engage of the housing inwardly over the septum with a swaging tool, the swaging tool having a septum-engaging portion configured for directly engaging the septum before the swaged outside end of the housing applies longitudinal compression to the septum;
- and
- stopping the swaging process when the swaging tool applies a predetermined amount of force to the septum at the location where the septum-engaging portion of the swaging tool is engaging the septum;
- the method further comprising cutting a slit into the septum before the septum is inserted into the passageway of the housing, the step of cutting a slit into the septum comprises:
- providing an apparatus for slitting the septum comprising a block having a septum-receiving bore, a back support for supporting one end of the septum, and a knife;
- inserting the septum into the septum-receiving bore against the back support;
- cutting the slit into the septum;
- and
- removing the septum from the septum-receiving bore.
8 more elements
A method of fabricating an injection or sampling site adapted to receive a blunt cannula, the method comprising the steps of:
- providing a housing having an outside end and a passageway extending inwardly from the outside end, the passageway opening through the outside end and defining a longitudinal direction;
- inserting an elastomeric septum into the passageway of the housing;
- swaging the outside end of the housing inwardly over the septum with a swaging tool, the swaging tool having a septum-engaging portion configured for directly engaging the septum before the swaged outside end of the housing applies longitudinal compression to the septum;
- and
- stopping the swaging process when the swaging tool applies a predetermined amount of force to the septum at the location where the septum-engaging portion of the swaging tool is engaging the septum;
- the septum-engaging portion and housing-swaging portion of the swaging tool being configured such that the septum-engaging portion of the swaging tool applies the predetermined force to the septum without the swaged outside end of the housing applying longitudinal compression to the septum;
- the step of stopping the swaging process comprising:
- stopping the swaging process before the swaged outside end of the housing applies longitudinal compression to the septum.
5 more elements
A method of fabricating an injection or sampling site adapted to receive a blunt cannula, the method comprising the steps of:
- providing a housing having an outside end and a passageway extending inwardly from the outside end, the passageway opening through the outside end and defining a longitudinal direction, the housing having an inner ledge defining the inner end of a septum-receiving portion of the passageway;
- inserting an elastomeric septum into the passageway of the housing such that the inside end of the septum engages the inner ledge;
- swaging the outside end of the housing inwardly over the septum with a swaging tool, the swaging tool having a septum-engaging portion configured for directly engaging the septum before the swaged outside end of the housing applies longitudinal compression to the septum;
- and
- stopping the swaging process when the swaging tool applies a predetermined amount of force to the septum at the location where the septum-engaging portion of the swaging tool is engaging the septum;
- the septum-engaging portion and housing-swaging portion of the swaging tool being configured such that the septum-engaging portion of the swaging tool applies the predetermined force to the septum without the swaged outside end of the housing applying longitudinal compression to the septum;
- the step of stopping the swaging process comprising:
- stopping the swaging process before the swaged outside end of the housing applies longitudinal compression to the septum, the swaged outside end of the housing defining an outer ledge defining the outer end of the septum-receiving portion of the passageway.
5 more elements
A method comprising:
- providing an elastomeric septum;
- providing an apparatus for slitting the septum comprising a block having a septum-receiving bore, a back support for supporting one end of the septum, and a knife;
- inserting the septum into the septum-receiving bore against the back support, and constraining the septum in the septum-receiving bore against lateral deformation;
- cutting the slit into the septum with the knife axially aligned with the septum-receiving bore;
- after cutting the slit into the septum, removing the septum from the septum-receiving bore;
- and
- during or after removal of the septum from the septum-receiving bore, inserting the septum into a housing of an injection or sampling site.
4 more elements
Dependencies are inferred from the claim text.