US PATENT SUBCLASS 173 / 204
.~.~ Fluid 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}
202  DF  .~ Hammer head driven by spring {4}
204.~.~ Fluid spring

DEFINITION

Classification: 173/204

Fluid spring:

(under subclass 202) Apparatus wherein the resilient element is a fixed volume of a compressible pneumatic or hydraulic fluid contained in a chamber on either side of the hammer head.

SEE OR SEARCH THIS CLASS, SUBCLASS:

212, for a fluid spring used as an impact cushioning means.