Devices for injecting a substance and methods therefor

Patent metadata

Field	Value
Publication number	US-9278181-B2
Application number	US-201113053448-A
Country	US
Kind code	B2
Filing date	Mar 22, 2011
Priority date	Mar 24, 2010
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A device for administering injections includes a housing having an upper end, a lower end including a bottom surface with an injection needle opening, and an axis extending between the upper and lower ends. The device includes an injection needle disposed within the housing for moving between a retracted position and an extended position.

First claim

What is claimed is:

1. A device for administering injections comprising:
a housing having an upper end, a lower end including a bottom surface with an injection needle opening, and an axis extending between said upper and lower ends of said housing;
an injection needle disposed within said housing for moving along said axis between a retracted position in which said injection needle is disposed within said housing and an extended position in which a distal end of said injection needle extends through said injection needle opening at said bottom surface of said housing;
a first conduit for directing a first liquid component toward said injection needle;
a second conduit for directing a second liquid component toward said injection needle;
an injection actuator coupled with said injection needle for moving said injection needle from said retracted position to said extended position and advancing said first and second liquid components toward said injection needle for dispensing a liquid solution including said first and second liquid components from said distal end of said injection needle;
a first syringe barrel in fluid communication with said first conduit, and a first plunger in said first barrel for alternatively drawing said first liquid component into said first barrel and dispensing said first liquid component from said first barrel and into said first conduit;
a second syringe barrel in fluid communication with said second conduit, and a second plunger in said second barrel for alternatively drawing said second liquid component into said second barrel and dispensing said second liquid component from said second barrel and into said second conduit;
a plunger base moveable along said axis of said housing and being connected with said first and second plungers for ensuring simultaneous movement of said first and second plungers between said upper and lower ends of said housing so that said first and second liquid components are simultaneously drawn into and dispensed from said first and second syringe barrels;
wherein said first conduit comprises a first one-way check valve for directing flow of said first liquid component in a single downstream direction, said first one-way check valve including an upstream opening coupled with said first reservoir and a downstream opening, a first T-connector having a first opening in fluid communication with said downstream opening of said first one-way check valve, a second opening in fluid communication with said first syringe barrel, and a third opening, and a first tube having a proximal end in fluid communication with said third opening of said first T-connector and a downstream end in fluid communication with said injection needle, wherein said first liquid component flows between said first and second openings of said first T-connector as said first liquid component is drawn into said first syringe barrel and flows between said second and third openings of said first T-connector and into said proximal end of said first tube as said first liquid component is dispensed from said first syringe barrel;
wherein said second conduit comprises a second one-way check valve for directing flow of said second liquid component in a single downstream direction, said second one-way check valve including an upstream opening coupled with said second reservoir and a downstream opening, a second T-connector having a first opening in fluid communication with said downstream opening of said second one-way check valve, a second opening in fluid communication with said second syringe barrel, and a third opening, and a second tube having a proximal end in fluid communication with said third opening of said second T-connector and a downstream end in fluid communication with said injection needle, wherein said second liquid component flows between said first and second openings of said second T-connector as said second liquid component is drawn into said second syringe barrel and flows between said second and third openings of said second T-connector and into said proximal end of said second tube as said second liquid component is dispensed from said second syringe barrel;
at least one catch projecting from an outer surface of a needle housing for selectively coupling said needle housing and said plunger base together for providing simultaneous movement of said needle housing and said plunger base along said axis of said housing;
at least one catch actuator coupled with said at least one catch for selectively decoupling said needle housing from said plunger base so that said needle housing and said plunger base are capable of moving independently of one another along said axis of said housing; and
a plunger spring having an upper end in contact with said plunger base and a lower end in contact with said housing, wherein said plunger spring is compressed when said at least one catch of said needle housing is coupled with said plunger base for storing energy in said plunger spring, wherein said at least one catch is adapted for being decoupled from said plunger base so that said energy stored in said plunger spring urges said plunger base away from said bottom surface of said housing for driving said first and second plungers into said respective first and second syringe barrels as said plunger base moves away from said bottom surface of said housing.

2. The device according to claim 1 , further comprising a mixing chamber located between distal ends of said first and second conduits and a proximal end of said injection needle, said mixing chamber being adapted for combining said first and second liquid components into said liquid solution and directing said liquid solution into said proximal end of said needle.

3. The device according to claim 2 , wherein said needle housing is adapted to hold said injection needle, said needle housing having an upper end and a lower end, wherein said distal end of said needle projects from said lower end of said needle housing, and wherein said injection actuator is coupled with said needle housing.

4. The device according to claim 3 , further comprising a needle hub connected with a proximal end of said injection needle for connecting said injection needle with said needle housing and directing said first and second liquid components toward said proximal end of said injection needle, wherein said needle hub includes said mixing chamber.

5. The device according to claim 4 , wherein said first conduit has a proximal end and a distal end in fluid communication with said mixing chamber, and said second conduit has a proximal end and a distal end in fluid communication with said mixing chamber.

6. The device according to claim 5 , further comprising:
a first reservoir in fluid communication with said proximal end of said first conduit for storing said first liquid component; and
a second reservoir in fluid communication with said proximal end of said second conduit for storing said second liquid component.

7. The device according to claim 1 , wherein said injection actuator is engageable for commencing an injection cycle comprising:
a first stage during which said needle housing moves toward said lower end of said housing for advancing said distal end of said injection needle through said injection needle opening, with said at least one catch being coupled with said plunger base for pulling said plunger base toward said lower end of said housing for drawing said first and second liquid components into said first and second syringe barrels, and said plunger spring being compressed by said plunger base as said plunger base is pulled toward said lower end of said housing for storing energy in said plunger spring; and
a second stage during which said at least one catch is decoupled from said plunger base so that said plunger base

Assignees

• Meron Moti
• Nur Israel
• Atlas Roee
• Omrix Biopharmaceuticals Ltd

Inventors

• Meron Moti
• Nur Israel
• Atlas Roee

Classifications

• A61M5/31581

  performed by rotationally moving or pivoting actuator operated by user, e.g. an injection lever or handle · CPC title

• A61B17/00491 Primary

  Surgical glue applicators · CPC title

• A61M5/3287 Primary

  Accessories for bringing the needle into the body; Automatic needle insertion (A61M5/20, A61M5/31525 take precedence) · CPC title

• A61M5/326

  Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user · CPC title

• A61M5/3257

  Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means · CPC title