US PATENT SUBCLASS 137 / 625.68-- .~.~.~.~.~ With internal flow passage

US PATENT SUBCLASS 137 / 625.68
.~.~.~.~.~ With internal flow passage

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

Internet Version by PATENTEC © 1999 Terms of Use

137 /	HD	FLUID HANDLING

561 R	DF	SYSTEMS {32}
625	DF	.~ Multi-way valve unit {12}
625.2	DF	.~.~ Supply and exhaust {4}
625.25	DF	.~.~.~ Reciprocating valve {3}
625.67	DF	.~.~.~.~ Piston valve {2}
625.68		.~.~.~.~.~ With internal flow passage

DEFINITION

Classification: 137/625.68

(under subclass 625.67) Device wherein the piston has a flow passage within it for the line fluid.