A vibratory and impact connector for a power tool is provided with a spring, a first drive rod, a drive ring and a second drive rod which are sequentially received in an outer cylinder. The first drive rod is inserted through the spring and extended out of the outer cylinder, the second drive rod is...http://www.google.com/patents/US7874378?utm_source=gb-gplus-sharePatent US7874378 - Vibratory and impact connector for a power tool
