Discharge device for bone replacement materials

Patent metadata

Field	Value
Publication number	US-10478316-B2
Application number	US-201415533392-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 17, 2014
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A discharge device (1) comprising a housing (200), a container insert (300) rotatably arranged therein and a piston. A lateral cutout (205) is formed in one housing wall (204), and a lateral container opening (303) is formed in one container wall (304). In order to prevent the compound from being compressed as the compound is discharged, the lateral container opening extends continuously as far as the distal container end (302) without a region of the container wall adjoining the lateral container opening in the distal direction along the longitudinal axis. In order to make it easier to put in the compound, the wall thickness of the housing wall decreases continuously toward the lateral cutout (205). In order to prevent clogging of the piston, the cross section of the container insert widens continuously in the distal direction.

First claim

The invention claimed is:

1. A discharge device for discharging a mass, comprising:
a housing having a peripheral housing wall, an open proximal housing end, and an open distal housing end, wherein a lateral cutout is formed in the housing wall;

a piston; and
a container insert, which is situated in the housing and comprises a peripheral container wall, an open proximal container end, and a distal container end, wherein a lateral container opening is formed in the container wall, and wherein the container insert can be rotated about a longitudinal axis relative to the housing between a closed position, in which the housing wall closes the lateral container opening, and a release position, in which the lateral cutout releases the lateral container opening,
wherein the lateral container opening extends continuously in an axial direction up to the distal container end without a region of the container wall adjoining the lateral container opening in a distal direction along the longitudinal axis, and
wherein the piston is displaceable in the container insert along the longitudinal axis.

2. A discharge device for discharging a mass, comprising:
a housing having a peripheral housing wall, an open proximal housing end, and an open distal housing end, wherein a lateral cutout is formed in the housing wall; and
a container insert, which is situated in the housing and comprises a peripheral container wall, an open proximal container end, and a distal container end,
wherein a lateral container opening is formed in the container wall, and
wherein the container insert can be rotated about a longitudinal axis relative to the housing between a closed position, in which the housing wall closes the lateral container opening, and a release position, in which the lateral cutout releases the lateral container opening, wherein the housing wall has a wall thickness in the region of the lateral cutout, which continuously decreases in the circumferential direction toward the lateral cutout through an angular range which is at least 10°.

3. The discharge device as claimed in claim 2 , wherein the wall thickness of the housing wall decreases in the circumferential direction toward the lateral cutout in such a way that the housing wall forms a scraping edge on the lateral cutout.

4. The discharge device as claimed in claim 3 , wherein the container wall tapers in the circumferential direction toward the lateral container opening in such a way that said wall forms a blade-like shearing edge adjacent to the housing wall, and wherein the scraping edge and the shearing edge adjoin one another in the release position.

5. A discharge device for discharging a mass, comprising:
a housing having a peripheral housing wall, an open proximal housing end, and an open distal housing end, wherein a lateral cutout is formed in the housing wall; and
a container insert, which is situated in the housing and comprises a peripheral container wall, an open proximal container end, and a distal container end,
wherein a lateral container opening is formed in the container wall,
wherein the container insert can be rotated about a longitudinal axis relative to the housing between a closed position, in which the housing wall closes the lateral container opening, and a release position, in which the lateral cutout releases the lateral container opening, and
wherein the container insert has an open container cross-section which continuously increases in a distal direction along the longitudinal axis across an axial range.

6. The discharge device as claimed in claim 5 , wherein the axial range, across which the container cross-section continuously increases, extends from a proximal end of the container opening up to the distal container end.

7. The discharge device as claimed in claim 1 ,
wherein the piston defines a piston diameter,
wherein the piston is connected to a push rod,
wherein the push rod defines a rod diameter, and
wherein the piston diameter is larger than the rod diameter.

8. The discharge device as claimed in claim 1 , wherein the piston is slotted in such a way that said piston is capable of expanding radially.

9. The discharged device as claimed in claim 1 , wherein a deflector is formed on the distal housing end, which adjoins the distal container end in the distal direction and is curved along the distal direction toward the central longitudinal axis.

10. The discharge device as claimed in claim 1 , wherein at least one container rotation stop is formed on the container insert, and at least one housing rotation stop is formed on the housing, wherein the container rotation stop is formed so as to be contradirectional to the housing rotation stop, and wherein the container rotation stop and the housing rotation stop are arranged in such a way that the container rotation stop and the housing rotation stop strike one another at least one of during a rotation of the container insert in the housing in the direction of the release position and during an opposing rotation in the direction of the closed position.

11. The discharge device as claimed in claim 1 , wherein the container insert is prefilled with a mass, and wherein the discharge device comprises a removable closure which closes a housing outlet opening.

12. A method of providing a mass to be discharged in a discharge device which comprises a housing having a housing wall and a lateral cutout formed therein, and a container insert, which is rotatably situated in the housing and comprises a container wall and a lateral container opening formed therein, wherein the container insert is prefilled with a first component of the mass, and a removable closure closes the discharge device, and wherein the method comprises the following steps of:
rotating the container insert relative to the housing about the longitudinal axis, such that the lateral cutout releases the lateral container opening;
adding a second component of the mass through the lateral cutout and through the lateral container opening to the first component in the container insert;
rotating the container insert relative to the housing about the longitudinal axis, such that the housing wall closes the lateral container opening; and
removing the closure.

13. The discharge device as claimed in claim 2 , which also comprises a piston which is displaceable in the container insert along the longitudinal axis.

14. The discharge device as claimed in claim 13 ,
wherein the piston defines a piston diameter,
wherein the piston is connected to a push rod,
wherein the push rod defines a rod diameter, and
wherein the piston diameter is larger than the rod diameter.

15. The discharge device as claimed in claim 13 , wherein the piston is slotted in such a way that said piston is capable of expanding radially.

16. The discharged device as claimed in claim 2 , wherein a deflector is formed on the distal housing end, which adjoins the distal container end in the distal direction and is curved along the distal direction toward the central longitudinal axis.

17. The discharge device as claimed in claim 2 , wherein at least one container rotation stop is formed on the container insert, and at least one housing rotation stop is formed on the housing, wherein the container rotation stop is formed so as to be contradirectional to the housing rotation stop, and wherein the container rotation stop and the housing rotation stop are arranged in such a way that the container rotation stop and the housing rotation stop strike one another at least one of during a rotation of the container insert in the hou

Assignees

• Medmix Systems Ag
• Sulzer Mixpac Ag

Inventors

• Greter Andy
• Nieber Benjamin
• Procter Philip

Classifications

• A61B17/8825

  characterised by syringe details (A61B17/8822, A61B17/8827 take precedence) · CPC title

• A61B2017/8813

  Discharging means for excessively introduced fluid fillers, e.g. discharging excess cement · CPC title

• A61B17/8833

  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 title

• A61B17/8822

  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 title

• A61F2/4601 Primary

  for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity · CPC title