| 摘要 |
PCT No. PCT/DE90/00369 Sec. 371 Date Oct. 18, 1991 Sec. 102(e) Date Oct. 18, 1991 PCT Filed May 17, 1990.A power hand tool has a gear box casing having an opening, at least one high speed shaft extending through the opening, sealing member for sealing the gear box casing against lubricant leakage. The sealing member includes a sealing washer which does not rotate and sits tightly on the shaft and which radially touches a circumference of the opening. The sealing washer is composed of an elastic material which can absorb and release lubricant. |
