1. A medical cutting tool formed by brazing a working portion formed of cemented carbide or ceramics to a leading end of a shank portion formed by a round austenitic stainless steel bar,
wherein the shank portion includes a shank, a neck formed to be continuous to the shank, and a joint which is formed to be continuous to the neck and which brazes the working portion formed of cemented carbide or ceramics, and
at least a portion of stainless steel in the joint and near the joint of the neck includes a structure of a fiber shape.
2. The medical cutting tool according to claim 1, wherein a structure of the stainless steel in the joint at a side of the working portion is a granular structure.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A self-cooling beverage container capable of accommodating a beverage and having a lid member formed at either side thereof to be opened, if necessary, to exhaust the beverage outside, the self-cooling beverage container comprising:
a refrigerant vessel provided inside the beverage container and having a refrigerant valve configured to exhaust an internal refrigerant outside;
an evaporator tubing having one end connected to the refrigerant valve and the other end led to the outside of a container body to allow evaporation of the refrigerant exhausted through the refrigerant valve and to remove an evaporation heat for the refrigerant from the beverage to cool the beverage; and
a refrigerant valve actuator configured to actuate the refrigerant valve, if necessary.
2. The self-cooling beverage container of claim 1, wherein the top end of the refrigerant vessel is disposed within a movable radius of the lid member when the lid member is severed and moved inside the beverage vessel, and the refrigerant valve actuator includes the lid member movable inside the beverage container and a handle installed on the lid member and capable of easily severing the lid member.
3. The self-cooling beverage container of claim 2, wherein the top end of the refrigerant vessel is in contact with the lid member.
4. The self-cooling beverage container of claim 1, wherein the refrigerant actuator is a convex portion formed such that one upper end of the beverage container is made convex upward, for providing a recess to which the top end of the refrigerant vessel is connected inside the beverage container.
5. The self-cooling beverage container of any one of claims 1 through 4, further comprising an exhaust cap elevatably installed at one end of the evaporator tubing and having an exhaust hole for exhaustion of the evaporated refrigerant formed on its lateral surface.
6. The self-cooling beverage container of claim 5, wherein a sound generating device is installed in the exhaust cap so that characteristic sound can be generated while the evaporated refrigerant is exhausted through the exhaust hole.
7. The self-cooling beverage container of any one of claims 1 through 5, wherein, a tapering locking protrusion is installed at the refrigerant vessel around the refrigerant vessel, and a wedge tube having a locking flange for preventing the locking protrusion from escaping outside once inserted, is installed at the opposite end of the evaporator tubing facing the refrigerant valve.