High pressure coolant tube and tool body-high pressure coolant tube assembly

1. A high pressure coolant tube for receipt by a tool body, the high pressure coolant tube comprising:

a coolant tube body having an entrance body end and an exit body end, the coolant tube body having an annular flange adjacent to the exit body end;

a threaded collar having an exterior threaded surface, the threaded collar containing an interior collar bore comprising an enlarged diameter interior collar bore surface portion and a reduced diameter interior collar bore surface portion;

an exit seal pocket defined by an exit-facing flange surface of the annular flange and a reduced diameter body section and the enlarged diameter interior collar bore surface portion;

an entrance seal assembly pocket defined by an entrance-facing flange surface of the annular flange and the reduced diameter body section and the enlarged diameter interior collar bore surface portion;

an exit seal being in the exit seal pocket; and

an entrance seal assembly being in the entrance seal assembly pocket, and the entrance seal assembly comprising an entrance seal sandwiched by a pair of thermoplastic polyester elastomeric rings,

wherein the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the entrance seal.

2. The high pressure coolant tube according to claim 1 wherein the thermoplastic polyester elastomeric rings have a hardness of between about 51 Shore D and about 61 Shore D.

3. The high pressure coolant tube according to claim 1 wherein the thermoplastic polyester elastomeric rings have a hardness of about 56 Shore D.

4. The high pressure coolant tube according to claim 1 wherein the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the exit seal.

5. A tool body-high pressure coolant tube assembly comprising:

a tool body that contains a bore having a threaded bore portion wherein the threaded bore portion terminates at a tool body shoulder;

a high pressure coolant tube comprising:

a coolant tube body having an entrance body end and an exit body end, the coolant tube body having an annular flange adjacent to the exit body end;

a threaded collar having an exterior threaded surface, the threaded collar containing an interior collar bore comprising an enlarged diameter interior collar bore surface portion and a reduced diameter interior collar bore surface portion;

an exit seal pocket defined by an exit-facing flange surface of the annular flange and a reduced diameter body section and the enlarged diameter interior collar bore surface portion;

an entrance seal assembly pocket defined by an entrance-facing flange surface of the annular flange and the reduced diameter body section and the enlarged diameter interior collar bore surface portion;

an exit seal being in the exit seal pocket;

an entrance seal assembly being in the entrance seal assembly pocket, and the entrance seal assembly comprising an entrance seal sandwiched by a pair of thermoplastic polyester elastomeric rings;

wherein upon the complete insertion of the high pressure coolant tube into the bore of the tool body, the exit seal being compressed between the tool body shoulder and the exit-facing flange surface of the annular flange; and

wherein the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the entrance seal.

6. The tool body-high pressure coolant tube assembly according to claim 5 wherein the thermoplastic polyester elastomeric rings have a hardness of between about 51 Shore D and about 61 Shore D.

7. The tool body-high pressure coolant tube assembly according to claim 5 wherein the thermoplastic polyester elastomeric rings have a hardness of about 56 Shore D.

8. The tool body-high pressure coolant tube assembly according to claim 5 wherein the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the exit seal.

9. A high pressure coolant tube for receipt by a tool body and capable of operating at a coolant pressure of up to about 500 bar, the high pressure coolant tube comprising:

a coolant tube body having an entrance body end and an exit body end, the coolant tube body having an annular flange adjacent to the exit body end;

a threaded collar having an exterior threaded surface, the threaded collar containing an interior collar bore comprising an enlarged diameter interior collar bore surface portion and a reduced diameter interior collar bore surface portion;

an exit seal pocket defined by an exit-facing flange surface of the annular flange and a reduced diameter body section and the enlarged diameter interior collar bore surface portion;

an entrance seal assembly pocket defined by an entrance-facing flange surface of the annular flange and the reduced diameter body section and the enlarged diameter interior collar bore surface portion;

an exit seal being in the exit seal pocket, and the exit seal comprising a rubber material; and an entrance seal assembly being in the entrance seal assembly pocket, and the entrance seal assembly comprising an entrance seal sandwiched by a pair of thermoplastic polyester elastomeric rings, the entrance seal comprising a rubber material, and wherein the thermoplastic polyester elastomeric rings having a hardness of between about 51 Shore D and about 61 Shore D,

wherein the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the entrance seal.

10. The high pressure coolant tube according to claim 9 wherein the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the exit seal.

11. The high pressure coolant tube according to claim 9 wherein the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the entrance seal, and the thermoplastic polyester elastomeric rings have a hardness greater than a hardness of the exit seal.