Curable material mixing and delivery device with cartridge

• US 8,021,037 B2
• Filed: 08/03/2007
• Issued: 09/20/2011
• Est. Priority Date: 03/10/2006
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: Carefusion 2200 Corporation (Becton, Dickinson & Co)
• Inventors: Kantola, Jim, Linderman, Evan D., Krueger, John A., Plishka, Michael, Massi, Shayna
• Primary Examiner(s): SOOHOO, TONY GLEN
• Application Number:
  US11/890,269
• Publication Number:
  US 20080116224A1
• Time in Patent Office: 1,509 Days
• Field of Search: 366/279, 366/289, 366/308, 366/320, 366/195, 366/189, 366/190, 366/194, 366/196, 222/192, 222/390
• US Class Current: 366/189
• CPC Class Codes: A61B 17/8822 characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
• CPC Class Codes: A61B 17/8827 with filtering, degassing, venting or pressure relief means
• CPC Class Codes: A61B 2017/8838 for mixing bone cement or fluid fillers
• CPC Class Codes: A61F 2002/3009 Transparent or translucent
• CPC Class Codes: A61F 2250/0071 breakable or frangible
• CPC Class Codes: A61F 2250/0091 transparent or translucent
• CPC Class Codes: B01F 2101/20 Mixing of ingredients for bone cement
• CPC Class Codes: B01F 27/1142 of the corkscrew type
• CPC Class Codes: B01F 33/50112 of the syringe or cartridge type
• CPC Class Codes: B01F 35/562 the mixer or mixing elements being collapsible, i.e. when discharging the products

Abstract

An apparatus and method for mixing two components and delivering the mixture to a patient. The apparatus contains a mixing chamber for mixing a liquid component and a powder component. The liquid component and powder component are mixed within the mixing chamber by rotation of a collapsible mixing element. A high strength cartridge capable of withstanding high opposing axial loads from the mixing chamber and a threaded rod generates force to drive the curable material from the mixing chamber. A plunger connected to the rod is then advanced through the mixing chamber to force the mixture out of the mixing chamber and deliver the mixture to the patient.

Claims

1. A device for dispensing curable material comprising:

a chamber housing defining a chamber operable for holding curable material;

a rod with a plunger configured to engage the curable material within the chamber to dispense the curable material from the chamber when the plunger is advanced within the chamber; and

a cartridge connected to the chamber housing, the cartridge defining a bore for receiving the rod, wherein the cartridge is subject to opposing axial forces by the chamber housing and the rod and elastically deforms in the axial direction when curable material is dispensed;

wherein the rod comprises a non-threaded section disposed lengthwise between a first threaded section and a second threaded section, and wherein the threaded rod sections are configured to engage a threaded portion of the cartridge; and

wherein the chamber comprises a mixing portion, a purging portion, and a delivery portion that correspond, respectively, with the first threaded section, the non-threaded section, and the second threaded section of the rod.

2. The device of claim 1 wherein the cartridge is capable of withstanding forces generated by dispensing the curable material of at least 800 lbs.

3. The device of claim 1 further comprising a handle housing for receiving the cartridge wherein the handle housing is not subject to opposing axial forces generated by the chamber housing and the rod.

4. The device of claim 1 further comprising a handle housing connected to the cartridge wherein a set of connection members between the handle housing and the cartridge are operable prevent relative rotational movement between the cartridge and the housing without transferring axial forces resulting from axial lengthening of the cartridge from the cartridge to the handle housing.

5. The device of claim 4 further comprising a second set of connection members that prevent relative axial movement between the cartridge and the handle housing.

6. The device of claim 5 wherein the second set of connection members comprises a plurality of connection members located in the same axial plane.

7. The device of claim 4 wherein the connection members comprise a rib and a slot.

8. The device of claim 1 wherein the threaded portion of the cartridge includes buttress threads.

9. The device of claim 1 wherein the plunger includes a resilient member.

10. The device of claim 9 wherein the plunger includes a larger diameter section, a smaller diameter section and a radial ridge, wherein the resilient member is located on the smaller diameter section and the radial ridge restricts axial motion of the resilient member.

11. The device of claim 1 further comprising a collapsible mixing element for mixing the curable material within the chamber.