One-hand pulse pump

• US 5,951,517 A
• Filed: 10/14/1997
• Issued: 09/14/1999
• Est. Priority Date: 10/14/1997
• Status: Expired due to Term

• Current Assignee: Merit Medical Systems, Inc.
• Original Assignee: Merit Medical Systems, Inc.
• Inventors: Sinnott, M. Mary, Trujillo, Jerry L., Lampropoulos, Fred P.
• Primary Examiner(s): Smith, Jeffrey A.
• Application Number:
  US08/950,272
• Time in Patent Office: 700 Days
• Field of Search: 604/134, 604/135, 604/151, 604/152
• US Class Current: 604/151
• CPC Class Codes: A61M 2025/09091 where a sheath surrounds the coil at the distal part
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0075 Valve means
• CPC Class Codes: A61M 3/005 comprising means for injection of two or more media, e.g. by mixing

Abstract

A hand operated, fluid dispensing pump includes a body that slidably interacts with a handle. The body includes a valve housing fluid coupled with an inlet passageway, an outlet passageway, and a dispensing barrel. A finger rest rigidly projects from the dispensing barrel. A loading chamber is recessed within the finger rest and is configured to receive a fluid supply syringe. A plunger, mounted to the handle, is slidably received within the dispensing barrel. As the plunger is advanced within the barrel, fluid is dispensed from the pump. Once the plunger is fully advanced, a spring disposed between the body and the handle automatically retracts the plunger within the barrel. As the plunger is retracted within the barrel, the barrel is automatically filled with a fluid from the fluid supply syringe.

Claims

1. A hand pump for dispensing a fluid, the hand pump comprising:

(a) a dispensing barrel having a chamber;

(b) a finger rest rigidly attached to the dispensing barrel, the finger rest having a loading chamber formed therein, the loading chamber being fluid coupled to the chamber of the dispensing barrel through an inlet passageway;

(c) a plunger having a tip end slidably received within the chamber of the dispensing barrel; and

(d) a handle mounted to the plunger.

2. A hand pump as recited in claim 1, further comprising a dual check valve to allow control of direction of fluid flow.

3. A hand pump as recited in claim 1, further comprising graduations on the outside surface of the dispensing barrel to allow for accurate measurement of the required dose.

4. A hand pump as recited in claim 1, further comprising means for automatically retracting the plunger within the dispensing barrel after the plunger is manually advanced within the dispensing barrel.

5. A hand pump as recited in claim 4, wherein the means for automatically retracting the plunger comprises a spring disposed between the handle and the finger rest.

6. A hand pump as recited in claim 1, further comprising:

(a) a fluid supply syringe configured to be received within the loading chamber such that the supply syringe is substantially enclosed therein; and

(b) means for fluid coupling the supply syringe to the inlet passageway.

7. A hand pump as recited in claim 1, further including:

(a) a fluid supply tubing and reservoir configured to be received within the loading chamber; and

(b) means for fluid coupling of the supply tubing and reservoir to the inlet passageway.

8. A hand pump as recited in claim 1, further comprising:

(a) a valve housing directly fluid coupled to an outlet passageway, the inlet passageway, and the chamber of the dispensing barrel; and

(b) valve means positioned within the valve housing for enabling fluid to pass from the inlet passageway to the dispensing barrel when the plunger is retracted within the barrel and for enabling fluid to pass from the dispensing barrel to the outlet passageway when the plunger is advanced within the dispensing barrel.

9. A hand pump for dispensing a fluid, the hand pump comprising:

(a) a body including;

(i) a dispensing barrel having a chamber extending between a first end and an opposing free second end; and

(ii) a finger rest attached to the first end of the barrel;

(b) a plunger having a tip end slidably received within the second end of the dispensing barrel;

(c) a handle mounted to the plunger;

(d) container means for holding a defined amount of fluid, the container means being removably attached to the body; and

(e) means for fluid coupling the container means to the dispensing barrel when the container means is attached to the body.

10. A hand pump as recited in claim 9, wherein the means for fluid coupling the container means to the dispensing barrel comprises the body, wherein the body further includes:

(a) a valve housing directly fluid coupled to an outlet passageway, an inlet passageway, and the chamber of the dispensing barrel at the first end thereof, the inlet passageway having a first end remote from the valve housing;

(b) valve means positioned within the valve housing for enabling fluid to pass from the inlet passageway to the dispensing barrel when the plunger is retracted within the barrel and for enabling fluid to pass from the dispensing barrel to the outlet passageway when the plunger is advanced within the dispensing barrel; and

(c) means for fluid coupling the container means to the first end of the inlet passageway.

11. A hand pump as recited in claim 10, further comprising a rotator connector mounted to the outlet passageway at the end thereof remote from the valve housing.

12. A hand pump as recited in claim 9, wherein the body further comprises a loading chamber recessed therein, the loading chamber being configured to receive at least a portion of the container means when the container means is attached to the body.

13. A hand pump as recited in claim 12, wherein the loading chamber is recessed within the finger rest.

14. A hand pump as recited in claim 9, wherein the container means comprises a syringe.

15. A hand pump as recited in claim 9, wherein the container means comprises a fluid bag having a flexible tube attached thereto.

16. A hand pump as recited in claim 9, further comprising a resiliently compressible spring disposed between the body and the handle.

17. A hand pump comprising:

(a) a dispensing barrel having an exterior surface and a chamber each extending between a first end and an opposing free second end;

(b) an elongated finger rest rigidly mounted to the dispensing barrel;

(c) a plunger having a tip end and an opposing tail end, the tip end being slidably received within the second end of the barrel;

(d) a handle mounted to the plunger; and

(e) regulating means partially mounted on the exterior of the dispensing barrel for selectively controlling how far the plunger can slide within the dispensing barrel.

18. A hand pump as recited in claim 17, further comprising graduations marked on the outside surface of the dispensing barrel to allow for accurate measurement of the required dose.

19. A hand pump as recited in claim 17, wherein the regulating means comprises:

(a) the handle having a plunger chamber communicating with the exterior through a port, the second end of the dispensing barrel being disposed within the plunger chamber through the port;

(b) a knob threadedly mounted on the exterior of the dispensing barrel, the knob being captured within the plunger chamber.

20. A hand pump as recited in claim 19, further comprising a spring encircling the plunger and extending between the knob and the tail end of the plunger.

21. A hand pump as recited in claim 19, further comprising a side opening extending through the plunger chamber to facilitate select rotation of the knob.

22. A hand pump as recited in claim 19, wherein the handle further comprising an elongated palm rest projecting from the plunger chamber.

23. A hand pump as recited in claim 19, further comprising:

(a) an alignment plate projecting from the finger rest; and

(b) the handle further comprising an elongated palm rest projecting from the plunger chamber, the palm rest having an elongated slot formed therein, the alignment plate being slidably positioned within the slot.

24. A hand pump as recite in claim 17, further comprising:

(a) the handle having a palm rest attached thereto; and

(b) the plunger having a plunger passageway longitudinally extending therethrough and into the palm rest.

25. A hand pump as recited in claim 24, further comprising a fluid chamber formed within the palm rest and fluid coupled with the plunger passageway.

26. A hand pump as recited in claim 24, further comprising:

(a) first check valve means positioned within the plunger passageway for enabling fluid to pass from the plunger passageway into the dispensing barrel when the plunger is retracted within the dispensing barrel; and

(b) second check valve means positioned within the first end of the dispensing barrel for enabling fluid within the dispensing barrel to pass through the first end thereof when the plunger is advanced within the dispensing barrel.

27. A hand pump for dispensing a fluid, the hand pump comprising:

(a) an integral body comprising;

(i) a head including a valve housing fluid coupled to an inlet passageway, an outlet passageway, and a dispensing barrel,

(ii) a finger rest projecting from the head;

(b) a handle slidably attached to the body;

(c) a plunger mounted to the handle and slidably received within the dispensing barrel; and

(d) a spring disposed between the handle and the body.

28. A hand pump as recited in claim 27, further comprising valve means positioned within the valve housing for enabling fluid to pass from the inlet passageway to the dispensing barrel when the plunger is retracted within the barrel and for enabling fluid to pass from the dispensing barrel to the outlet passageway when the plunger is advanced within the dispensing barrel.

29. A hand pump as recited in claim 27, further comprising a loading chamber recessed within the finger rest, the loading chamber being in fluid communication with the inlet passageway.

30. A hand pump as recited in claim 27, further comprising a fluid supply syringe having a barrel for holding the fluid and being configured to be received with the loading chamber for fluid coupling with the inlet passageway.

31. A hand pump as recited in claim 27, further comprising:

(a) the handle having a plunger chamber communicating with the exterior through a port, the second end of the dispensing barrel being disposed within the plunger chamber through the port; and

(b) a knob threadedly mounted on the exterior of the dispensing barrel, the knob being captured within the plunger chamber.

32. A hand pump as recited in claim 31, further comprising a side opening extending through the plunger chamber to facilitate select rotation of the knob.

33. A hand pump as recited in claim 31, wherein the handle further comprises an elongated palm rest projecting from the plunger chamber.

34. A hand pump as recited in claim 27, further comprising:

(a) an alignment plate projecting from the finger rest; and

(b) the handle further comprising an elongated palm rest projecting from the plunger chamber, the palm rest having an elongated slot formed therein, the alignment plate being slidably positioned within the slot.