| 摘要 |
<p>PCT No. PCT/AU81/00093 Sec. 371 Date Mar. 30, 1982 Sec. 102(e) Date Mar. 30, 1982 PCT Filed Jul. 20, 1981 PCT Pub. No. WO82/00430 PCT Pub. Date Feb. 18, 1982.Impact device comprising a housing with a rotatable impeller located eccentrically therein. The impeller includes masses located in radial apertures which, upon rotation of the impeller, are caused to strike the head of an impact tool extending at least partially into the cavity within the housing formed by the eccentric location of the impeller.</p> |
