System and method for a syringe micro pump with volute spring

• US 10,406,282 B2
• Filed: 10/12/2016
• Issued: 09/10/2019
• Est. Priority Date: 12/10/2015
• Status: Active Grant

• Current Assignee: KORU Medical Systems, Inc.
• Original Assignee: Repro-Med Systems Incorporated
• Inventors: Sealfon, Andrew I, Gheshmi, Siavash
• Primary Examiner(s): Lee, Brandy S
• Application Number:
  US15/291,758
• Publication Number:
  US 20170165415A1
• Time in Patent Office: 1,063 Days
• CPC Class Codes: A61M 2005/31518 designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/20 Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically A61M5/142 , A61M5/46 take precedence; hypodermic projectiles F42B12/54
• CPC Class Codes: A61M 5/3137 Specially designed finger grip means, e.g. for easy manipulation of the syringe rod
• CPC Class Codes: A61M 5/31511 Piston or piston-rod constructions, e.g. connection of piston with piston-rod A61M5/5066 takes precedence
• CPC Class Codes: A61M 5/31531 Microsyringes, e.g. having piston bore diameter close or equal to needle shaft diameter

Abstract

Provided is a system and method for a removable syringe micro pump. More specifically, the removable syringe micro pump includes a pump housing having a first end and opposite thereto an attaching end, and at least one sidewall there between, the housing having a base proximate to the first end and, the attaching end having an attacher structured and arranged to temporarily engage a syringe. A volute spring is nested within the housing and attached proximate to the base, the volute spring having a compressed first position wherein coils of the volute spring are concentrically disposed under tension such that an initial height of the volute spring is equivalent to a width of a coil, and an extended second position wherein the release of tension extends the volute spring normally away from the pump housing. The volute spring has a diameter pre-selected to pass within a barrel of the engaged syringe. The volute spring further having a distal end structured and arranged to engage a plunger seal of the engaged syringe, wherein the release of tension between the first position and the second position permits the distal end of the volute spring to move the plunger seal towards a nozzle of the syringe. An associated method of use is also provided.

Claims

1. A system for a removable syringe micro pump with volute spring, comprising:

a pump housing having a first end and opposite thereto an attaching end, and at least one sidewall there between, the pump housing having a base proximate to the first end and, the attaching end having an attacher structured and arranged to temporarily engage a syringe having a barrel with an open end opposite from a nozzle, the attacher structured and arranged to attach the attaching end to the open end of the syringe;

a volute spring nested within the pump housing and attached proximate to the base, the volute spring having a compressed first position wherein coils of the volute spring are concentrically disposed under tension such that an initial height of the volute spring is equivalent a width of a coil, the volute spring having an extended second position wherein the release of tension extends the volute spring normally away from the removable syringe micro pump, the volute spring having a diameter pre-selected to pass within a barrel of the engaged syringe, the volute spring further having a distal end structured and arranged to engage a plunger seal of the engaged syringe, wherein the release of tension between the first position and the second position permits the distal end of the volute spring to move the plunger seal towards a nozzle of the syringe.

2. The system for a removable syringe micro pump of claim 1, wherein the syringe has a set of finger grips, the attacher being a set of opposing flanges structured and arranged to engage the finger grips.

3. The system for a removable syringe micro pump of claim 1, wherein the sidewall of the pump housing has a dimension slightly larger than the width of the coil of the volute spring.

4. The system for a removable syringe micro pump of claim 3, wherein the syringe has a length, the dimension of the sidewall being less than half the length of the syringe.

5. The system for a removable syringe micro pump of claim 4, wherein the dimension of the sidewall is less than a quarter of the length of the syringe.

6. The system for a removable syringe micro pump of claim 1, wherein the pump housing has a central aperture in the base end structured and arranged to receive a plunger when the pump housing is attached to the syringe.

7. The system for a removable syringe micro pump of claim 1, wherein the pump housing further includes a volute spring restrainer operable to hold the volute spring in the first position until an operator desires to release the volute spring to the second extended position.

8. The system for a removable syringe micro pump of claim 1, wherein operation of the removable syringe micro pump as attached to the syringe is unaffected by orientation.

9. The system for a removable syringe micro pump of claim 1, wherein the volute spring is selected to have a tension correlated to dispense a solution from the syringe over about a pre-determined period of time.

10. The system for a removable syringe micro pump of claim 1, wherein removing the housing from the syringe disengages the volute spring from the plunger seal and halts progression of the plunger seal towards the nozzle of the syringe.

11. The system for a removable syringe micro pump of claim 1, wherein the removable syringe micro pump is reusable.

12. The system for a removable syringe micro pump of claim 1, wherein during operation of the pump when coupled to a syringe, motion of the volute spring occurs entirely within the pump housing and the barrel of the syringe.

13. The system for a removable syringe micro pump of claim 1, wherein the sidewall of the pump housing is cylindrical.

14. A system for a removable syringe micro pump with volute spring, comprising:

a cylindrical pump housing having a first end with a base and opposite thereto an attaching end providing at least one flange structured and arranged to temporarily bind with a set of finger grips provided by a syringe to which the cylindrical pump housing may be temporarily attached, the cylindrical pump housing having a central longitudinal axis;

a volute spring disposed within the cylindrical pump housing proximate to the base and about the longitudinal axis, the volute spring being axially compressible to fit within the cylindrical pump housing when a distal end of the volute spring is compressed to provide a compressed first position, a height of the volute spring being about the same as a length of the cylindrical pump housing, the volute spring further selected to have a diameter sufficient to slide within a barrel of a syringe, the distal end of the volute spring structured and arranged to engage a plunger seal of the engaged syringe as the volute spring transitions to an extended second position.

15. The system for a removable syringe micro pump of claim 14, wherein, the length of the cylindrical pump housing has a dimension slightly larger than the height of the coil of the volute spring in the initial tensioned position.

16. The system for a removable syringe micro pump of claim 14, wherein the syringe has a length, the length of the cylindrical pump housing being less than half the length of the syringe.

17. The system for a removable syringe micro pump of claim 14, wherein the syringe has a length, the length of the cylindrical pump housing being less than a quarter the length of the syringe.

18. The system for a removable syringe micro pump of claim 14, wherein the cylindrical pump housing has a central aperture in the base end structured and arranged to receive a plunger when the cylindrical pump housing is attached to the syringe.

19. The system for a removable syringe micro pump of claim 14, wherein the cylindrical pump housing further includes a volute spring restrainer operable to hold the volute spring in the first position until an operator desires to release the volute spring to the extended second position.

20. The system for a removable syringe micro pump of claim 14, wherein operation of the removable syringe micro pump as attached to the syringe is unaffected by orientation.

21. The system for a removable syringe micro pump of claim 14, wherein the volute spring is selected to have a tension correlated to dispense a solution from the syringe over about a pre-determined period of time.

22. The system for a removable syringe micro pump of claim 14, wherein removing the cylindrical pump housing from the syringe disengages the volute spring from the plunger seal and halts progression of the plunger seal towards the nozzle of the syringe.

23. The system for a removable syringe micro pump of claim 14, wherein the removable syringe micro pump is reusable.

24. The system for a removable syringe micro pump of claim 14, wherein during operation of the pump when coupled to a syringe, motion of the volute spring occurs entirely within the pump housing and the barrel of the syringe.

25. A method for using a removable syringe micro pump with volute spring to dispense a solution from a syringe, comprising:

providing a syringe having a barrel extending between a nozzle and a set of finger grips, a plunger seal disposed within the barrel and proximate to the set of finger grips, a solution disposed between the plunger seal and the nozzle;

providing a removable syringe micro pump including;

a cylindrical pump housing having a first end with a base and opposite thereto, an attaching end providing at least one flange structured and arranged to temporarily bind with the set of finger grips of the syringe, the cylindrical pump having a central longitudinal axis;

a volute spring disposed within the cylindrical pump housing proximate to the base and about the longitudinal axis, the volute spring being axially compressible to fit within the cylindrical pump housing when a distal end of the volute spring is compressed to provide a first tensioned position, a height of the volute spring being about the same as a length of the cylindrical pump housing, the volute spring further selected to have a diameter sufficient to slide within the barrel of the syringe, the distal end of the volute spring structured and arranged to engage a plunger seal of the engaged syringe; and

a volute spring restrainer structured and arranged to restrain the volute spring in the initial tension position until released by an operator;

attaching the removable spring loaded micro pump to the syringe; and

releasing the volute spring restrainer to permit the distal end of the volute spring to engage the plunger seal of the syringe, wherein, the release of tension from the first position permits the distal end of the volute spring to move the plunger seal towards the nozzle of the syringe, thereby, dispensing the solution from the syringe.

26. The method of claim 25, wherein the length of the cylindrical pump housing has a dimension slightly larger than the height of the coil of the volute spring in the initial tensioned position.

27. The method of claim 25, wherein the syringe has a length, the length of the cylindrical pump housing being less than half the length of the syringe.

28. The method of claim 25, wherein the syringe has a length, the length of the cylindrical pump housing being less than one quarter the length of the syringe.

29. The method of claim 25, wherein the pump housing has a central aperture in the base end structured and arranged to receive a plunger when the cylindrical pump housing is attached to the syringe.

30. The method of claim 25, wherein operation of the removable syringe micro pump as attached to the syringe is unaffected by orientation.

31. The method of claim 25, wherein the volute spring is selected to have a tension correlated to dispense the solution from the syringe over about a pre-determined period of time.

32. The method of claim 25, wherein removing the cylindrical pump housing from the syringe disengages the volute spring from the plunger seal and halts progression of the plunger seal towards the nozzle of the syringe.

33. The method of claim 25, wherein the removable syringe micro pump is reusable.

34. The method of claim 25, wherein during operation of the pump when coupled to a syringe, motion of the volute spring occurs entirely within the cylindrical pump housing and the barrel of the syringe.