Cutting tools for sample preparation

1. A cutting tool for cutting, handling and then ejecting disks of material cut from a sheet or like material, the tool comprising:

a body having a proximal end adapted to be rotatably driven about an axis, and having a distal end including a generally cylindrical cutting portion rotatable about said axis for cutting and receiving said disks;

an ejector slideable axially parallel with respect to the axis and within said cylindrical cutting portion for ejecting the received cut disks, wherein an ejection tip of the ejector is a flat surface;

a grip rotatably mounted to the body such that the grip can be held without substantial rotation whilst the body is rotated, said grip being operable to cause said sliding of the ejector and for ejecting the disks;

wherein the body includes a cavity having an opening, and the ejector includes a portion within the cavity which extends away from the axis and through the opening and can slide therein, said portion providing force transmitting communication between the ejector and the grip; and

wherein a resilient element is included in the cavity providing a force to urge the ejector toward the proximal end of the body.

2. A cutting tool as claimed in claim 1 , wherein the portion of the ejector is a pin engageable with the ejector in the cavity and the portion further includes a collar mounted slideably externally of the body, said grip being either rotatably mounted to the collar by means of a rolling element bearing or sliding bearing surfaces, or said grip being formed from an outer race or outer section of said bearing.

3. A cutting tool as claimed in claim 1 , wherein the cutting portion of the body is a cutting cylinder either formed from the material of the body, or formed from a separate part.

4. A cutting tool as claimed in claim 1 , wherein the proximal end of the body includes a hexagonal external formation.

5. A cutting tool as claimed in claim 1 , wherein the grip is an annulus.

6. A cutting tool as claimed in claim 5 , wherein the cutting portion of the body is a cutting cylinder formed from a separate part, and wherein the separate part is fitted replaceably to or into the body.

7. A cutting tool as claimed in claim 1 , wherein the body is formed from metal, or a moulded plastics material.

8. A cutting tool as claimed in claim 7 , wherein the body is formed from polypropylene.

9. A method for operating a tool of claim 1 , said method comprising the steps of:

inserting the tool into a hexagonal receiving aperture of an electrically powered drill or screwdriver;

rotating the tool when so inserted;

cutting and retaining a sample disk cut from a sample holding sheet or like material;

and ejecting said cut disk by pushing a stationary grip on the tool toward the distal end of the tool.

10. The method of claim 9 , wherein the portion of the ejector is a pin engageable with the ejector in the cavity and the portion further includes a collar mounted slideably externally of the body, said grip being either rotatably mounted to the collar by means of a rolling element bearing or sliding bearing surfaces, or said grip being formed from an outer race or outer section of said bearing.

11. The method of claim 9 , wherein the cutting portion of the body is a cutting cylinder either formed from the material of the body, or formed from a separate part, optionally being fitted replaceably to or into the body.

12. The method of claim 9 , wherein the proximal end of the body includes a hexagonal external formation.

13. The method of claim 9 , wherein the grip is an annulus optionally including a handle portion extending away from the axis.

14. The method of claim 9 , wherein the body is formed from metal, or a moulded plastics material, for example polypropylene.