| 摘要 |
PURPOSE:To prevent leak of oil by enlarging the contact area of a container with a cap to close the inlet for pouring into said container, giving it a form to provide possibility of coupling mechanically, and thereby having a sure blocking of said inlet. CONSTITUTION:A rotor 9 is placed in the body 1 of a container, and a lid 2 is set fast to this container body 1. The lid 2 is provided with an injection hole 12, through which a high viscosity oil 15 such as silicon oil is poured in, and blocking this injection hole 12 is made by setting a cap 16 on a projected part 14 formed around the injection hole 12 conical trapezoidally, wherein the cap 16 shall have a recess 17 so as to mate with said projected part 14. Thereby the recess 17 and protruded part 14 can be fitted tightly to provide good mechanical coupling of the cap 16 with the protruded part 14, so that the injection hole 12 can be blocked surely to contribute to secure prevention of leak of the oil 15. |
