US PATENT SUBCLASS 91 / 189 A
.~.~ Piston or rod directly valves passage

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

Internet Version by PATENTEC © 1999      Terms of Use


91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

170 R  DF  RELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER {12}
189 R  DF  .~ Position of one working member controls motive fluid for another {3}
189 A.~.~ Piston or rod directly valves passage

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 91/189

(under subclass 170) Apparatus in which motive fluid for one of said working members is controlled in response to another working member attaining a given position.

(1) Note. Included under this definition are patents claiming control of motive fluid for a first working member by fluid displaced by a second working member, usually from a nonworking chamber and as a function of the position of the latter member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

35+, for expansible chamber motors in which a fluid operated device controlling a working member is at least part of an independent motor which is in no way influenced by the working member controlled thereby and which has no output other than that required for control of the working member.

44, for expansible chamber motors having sequential operation of fluid operated locking means and a control of motive fluid for a working member.