US PATENT SUBCLASS 91 / 487
.~.~ Separate passage directs motive fluid to or from valve interface

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

472  DF  THREE OR MORE CYLINDERS ARRANGED IN PARALLEL RADIAL OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS {10}
486  DF  .~ Motive fluid bypass to or from assembly {3}
487.~.~ Separate passage directs motive fluid to or from valve interface

DEFINITION

Classification: 91/487

(under subclass 486) Apparatus in which there is provided valve means comprising plural relatively movable elements having interengaging face portions for controlling admission or discharge of motive fluid to or from said plural working chambers, at least one of said valve elements being provided with passage means for conducting motive fluid to or from the interface formed by said interengaging face portions, said passage means at no time serving to effect control of admission or discharge of motive fluid to or from said working chambers.