Disposable monomer dispenser and vial breaker

• US 6,099,532 A
• Filed: 07/13/1998
• Issued: 08/08/2000
• Est. Priority Date: 07/13/1998
• Status: Expired due to Fees

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: Howmedica Inc.
• Inventors: Florea, Stefan I.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Goldberg, Jonathan D.
• Application Number:
  US09/114,592
• Time in Patent Office: 757 Days
• Field of Search: 606/92-93, 604/218, 225/97, 225/93
• US Class Current: 606/93
• CPC Class Codes: A61B 17/8833 Osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means for supplying bone cement or fluid fillers to introducing tools, e.g. cartridge handling means
• CPC Class Codes: A61B 2017/8838 for mixing bone cement or fluid fillers
• CPC Class Codes: A61B 2050/0064 by screwing
• CPC Class Codes: A61B 2050/0083 Snap connection
• CPC Class Codes: A61B 2050/0089 having permanent closure means
• CPC Class Codes: A61B 2090/0814 Preventing re-use
• CPC Class Codes: A61F 2002/30716 for single use, e.g. having means for preventing re-use
• CPC Class Codes: A61F 2250/0071 breakable or frangible
• CPC Class Codes: A61F 2250/009 for single use, e.g. having means for preventing re-use
• CPC Class Codes: A61P 43/00 Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• CPC Class Codes: B01F 35/713 comprising breaking packages or parts thereof, e.g. piercing or opening sealing elements between compartments or cartridges containers or packages per se B65D

Abstract

A monomer dispenser and vial breaker includes a base portion and a cap portion which is attachable to the base portion. The base portion is substantially cylindrical, has an inner seat for supporting the shoulder of an ampoule, a knurled outer gripping surface, an exteriorally threaded portion, and an open end with a first locking structure. The cap portion is substantially cylindrical, has a first open end with interior threads and a second locking structure, a second open end, with a strainer and a vial breaking structure located between the first and second open ends. The cap portion is also provided with a knurled outer gripping surface. The monomer dispenser and vial breaker operate as follows: an ampoule is inserted into the base so that the shoulder of the ampoule rests on the inner seat, the cap is pushed onto the base so that locking structures engage, and the base and/or the cap are twisted relative to each other so that the threaded portions engage. As the cap and base are threaded together, the vial breaking structure breaks the bottom of the ampoule. The assembled device is then inverted to dispense the monomer through the second open end of the cap. After the dispenser is assembled and the monomer is dispensed, the locking structures prevent the device from being disassembled.

Claims

1. A monomer dispenser and vial breaker comprising:

a glass vial having a base;

a substantially cylindrical body portion surrounding said vial having an open end with a first locking structure; and

a cap portion mounted on the open end of said body and movable towards said vial and having a dispensing and an open end with a second locking structure and having a vial breaking structure for penetrating the base of said vial, said first locking structure being lockable to said second locking structure upon the penetration of said vial base by said vial breaking structure to prevent the reuse of the vial breaker.

2. A monomer dispenser and vial breaker according to claim 1 wherein said vial breaking structure includes a stem having a longitudinal axis and a planar surface forming an angle with said longitudinal axis.

3. A monomer dispenser and vial breaker according to claim 1 wherein said base portion has an inner seat for supporting the shoulder of the vial.

4. A monomer dispenser and vial breaker according to claim 3 wherein said base portion and said cap portion are dimensioned such that when an vial is placed in said base portion with said shoulder resting on said inner seat, the bottom of the vial will come in contact with said vial breaking structure when said cap portion and said base portion are locked together, causing said vial to break.

5. A monomer dispenser and vial breaker according to claim 1 wherein said base portion is ergonomically designed.

6. A monomer dispenser and vial breaker according to claim 1 wherein said base portion has a knurled outer gripping surface and said cap portion has a knurled outer gripping surface.

7. A monomer dispenser and vial breaker according to claim 1 wherein said base portion has a first threaded portion and said cap member has a second threaded portion which is engagable with said first threaded portion.

8. A monomer dispenser and vial breaker according to claim 1, wherein said cap portion has a strainer.

9. A monomer dispenser and vial breaker according to claim 8 wherein said strainer is substantially conical.

10. A monomer dispenser and vial breaker according to claim 1 wherein one of said first and second locking structures includes a plurality of resilient peripheral tapered barbs and the other locking structure includes an interior shelf dimensioned to allow the barbs to pass in one direction only.

11. A monomer dispenser and vial breaker according to claim 1 wherein said base portion includes a plurality of interior ribs for embracing vial.

12. A monomer dispenser and vial breaker according to claim 1 wherein said base portion includes a plurality of interior ribs dimensioned to allow the vial to be properly irradiated for sterilization purposes.

13. A monomer dispenser and vial breaker comprising:

(a) a substantially cylindrical base member having an open end with a first threaded portion; and

(b) a cap member having an open dispensing end, an open end with a second threaded portion, and a vial breaking structure, said second threaded portion being engagable with said first threaded portion, wherein said vial breaking structure includes a stem having a longitudinal axis and a planar surface forming an angle with said longitudinal axis.

14. A monomer dispenser and vial breaker according to claim 13 wherein said vial breaking structure includes a stem having a longitudinal axis and three planar surfaces each forming an angle with said longitudinal axis.

15. A monomer dispenser and vial breaker according to claim 13 wherein said cap member includes a substantially conical structure and said breaking structure is located at the apex of said conical structure.

16. A monomer dispenser and vial breaker according to claim 15 wherein said substantially conical structure is a tripod structure.

17. A monomer dispenser and vial breaker according to claim 16 wherein said substantially conical structure contains a strainer.

18. A method for opening an ampoule and dispensing a liquid contained in the ampoule utilizing a vial breaker having (a) a substantially cylindrical base portion with an open end, said base portion including a first locking structure, an inner seat for supporting the shoulder of the ampoule and a first threaded portion;

and (b) a cap portion having an open dispensing end, an open end with a second locking structure being lockable to said first locking structure such that said monomer dispenser and vial breaker cannot be reused and a vial breaking structure, and a second threaded portion which is engagable with said first threaded portion, comprising the steps of;

(a) inserting the ampoule into said base so that the shoulder of said ampoule rests on said inner seat,

(b) pushing said cap onto said base so that said first locking structure and said second locking structure engage one another; and

(c) twisting said base and/or said cap relative to one another so that said first threaded portion and said second threaded portion engage one another and drive said vial breaking structure as said base and/or cap are twisted so that said vial breaking structure breaks through the bottom of the ampoule.

19. A method as set forth in claim 18 further comprising the step of inverting said vial breaker to dispense the monomer through the second open end of said cap.

20. A method as set forth in claim 19 further comprising the step of straining said liquid to prevent broken portions of said ampoule from being dispensed.

21. A method as set forth in claim 20 wherein said step of pushing said cap onto said base so that said first locking structure and said second locking structure engage one another, prevents said cap and said base from being separated to thereby prevent reuse of said vial breaker.

22. A monomer dispenser and vial breaker, comprising:

(a) a substantially cylindrical base portion having an open end with a first locking structure; and

(b) a cap portion having an open dispensing end, an open end with a second locking structure, and a vial breaking structure, said second locking structure being lockable to said first locking structure, such that said monomer dispenser and vial breaker cannot be reused, wherein said vial breaking structure includes a stem having a longitudinal axis and a planar surface forming an angle with said longitudinal axis.

23. A monomer dispenser and vial breaker, comprising:

(a) a substantially cylindrical base portion having an open end with a first locking structure; and

(b) a cap portion having an open dispensing end, an open end with a second locking structure, and a vial breaking structure, said second locking structure being lockable to said first locking structure, such that said monomer dispenser and vial breaker cannot be reused, wherein one of said first and second locking structures includes a plurality of resilient peripheral tapered barbs and the other locking structure includes an interior shelf dimensioned to allow the barbs to pass in one direction only.