Devices for injecting a substance and methods therefor

Patent metadata

Field	Value
Publication number	US-10118002-B2
Application number	US-201615007346-A
Country	US
Kind code	B2
Filing date	Jan 27, 2016
Priority date	Mar 24, 2010
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

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 a needle housing with an injection needle. The needle housing is disposed within the housing for moving between a retracted position and an extended position. The device has an injection actuator for commencing an injection cycle including a first stage in which the needle housing and said plunger base are coupled together and move in a first direction along the axis and a second stage in which the needle housing and the plunger base are decoupled from one another so that the plunger base is free to move away from the needle housing in a second direction that is opposite the first direction.

First claim

What is claimed is:

1. A device for administering injections comprising:
a device housing having an upper end and a lower end including a bottom surface with an injection needle opening;
at least one syringe barrel;
at least one plunger connected with said at least one syringe barrel;
a plunger base connected with said at least one plunger, wherein said at least one plunger and said plunger base are adapted for reciprocal movement along an axis;
a plunger spring in contact with said plunger base;
a needle housing having an injection needle, said needle housing being adapted for reciprocal movement along said axis;
an injection actuator for commencing an injection cycle, the injection cycle including
a first stage in which said needle housing and said plunger base are coupled together and move in a first direction along said axis toward the lower end of said device housing, wherein said plunger base moving in the first direction compresses said plunger spring for storing energy in said plunger spring; and
a second stage in which said needle housing and said plunger base are decoupled from one another whereupon the energy stored in said plunger spring urges said plunger base to move away from said needle housing in a second direction along said axis toward the upper end of said device housing that is opposite the first direction.

2. The device as claimed in claim 1 , wherein said needle housing includes at least one catch projecting from an outer surface thereof for selectively coupling said needle housing and said plunger base together for providing simultaneous movement of said needle housing and said plunger base in a first direction along said axis.

3. The device as claimed in claim 2 , further comprising 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.

4. The device as claimed in claim 3 , further comprising:
said injection actuator having gear teeth;
said needle housing including an outer surface having a rack structure; and
at least one gear interconnecting said gear teeth of said injection actuator with said rack structure of said needle housing for advancing said needle housing along said axis.

5. The device as claimed in claim 1 , further comprising a housing having an upper end, a lower end including a bottom surface with an injection needle opening, wherein said axis extends between said upper and lower ends of said housing.

6. The device as claimed in claim 5 , wherein said injection needle is moveable 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.

7. The device as claimed in claim 1 , wherein said at least one syringe barrel comprises a first syringe barrel and a second syringe barrel, wherein said at least one plunger comprises a first plunger connected with said first syringe barrel and a second plunger connected with said second syringe barrel, and wherein said plunger base is connected with said first and second plungers and is adapted for moving simultaneously with said first and second plungers.

8. The device as claimed in claim 7 , further comprising at least one conduit providing a fluid path between said first and second syringe barrels and said injection needle.

9. The device as claimed in claim 8 , wherein said at least one conduit comprises:
a first conduit in communication with said first syringe barrel for directing a first liquid component toward said injection needle;
a second conduit in communication with said second syringe barrel for directing a second liquid component toward said injection needle;
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 a liquid solution and directing said liquid solution into said proximal end of said needle.

10. The device as claimed in claim 9 , 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.

11. The device as claimed in claim 10 , further comprising:
a first reservoir for storing said first liquid component;
said first conduit having a proximal end in fluid communication with said first reservoir and a distal end in fluid communication with said mixing chamber;
a second reservoir for storing said second liquid component; and
said second conduit having a proximal end in fluid communication with said second reservoir and a distal end in fluid communication with said mixing chamber.

12. The device as claimed in claim 11 , further comprising:
said first syringe barrel being in fluid communication with said first conduit, and said first plunger in said first barrel being adapted to alternatively draw said first liquid component into said first barrel and dispense said first liquid component from said first barrel and into said first conduit;
said second syringe barrel being in fluid communication with said second conduit, and said second plunger in said second barrel being adapted to alternatively draw said second liquid component into said second barrel and dispense said second liquid component from said second barrel and into said second conduit; and
said plunger base being 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.

13. The device as claimed in claim 12 , 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; and
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 sy

Assignees

• Ethicon Inc
• Ethicon Inc
• Omrix Biopharmaceuticals Ltd

Inventors

• Meron Moti
• Nur Israel
• Atlas Roee

Classifications

• A61M5/2448

  comprising means for injection of two or more media, e.g. by mixing · CPC title

• A61M5/3294 Primary

  comprising means for injection of two or more media, e.g. by mixing · CPC title

• A61B17/00491 Primary

  Surgical glue applicators · 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

• A61M5/322

  Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston (devices for protecting guide needles in combination with catheters A61M25/0612) · CPC title