US PATENT SUBCLASS 173 / 211
.~.~ Mechanical spring

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


173 /   HD   TOOL DRIVING OR IMPACTING

90  DF  IMPACTING DEVICES (E.G., HAMMERS) {19}
210  DF  .~ With impact cushioning means {2}
211.~.~ Mechanical spring

DEFINITION

Classification: 173/211

Mechanical spring:

(under subclass 210) Apparatus wherein the impact cushioning means is a resilient element that recovers its shape after being stretched or compressed.