US PATENT SUBCLASS 91 / 185
.~.~ Motive fluid control by pitman swing or intermittent contact with working member

Current as of: June, 1999
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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}
183  DF  .~ With means interconnecting working members to cause relative motion {5}
185.~.~ Motive fluid control by pitman swing or intermittent contact with working member

DEFINITION

Classification: 91/185

(under subclass 183) Apparatus having valve means to control the motive fluid flow to or from a working chamber, said valve means being actuated by either (1) means connected to the valve means and disposed in the path of a working member for intermittent contact therewith or (2) by pivotal motion of a member pivoted to a working member at one end and connected to a transmission at its other end.

(1) Note. The valve means may be formed in a member pivoted to the working member so that ports therein are intermittently aligned with ports in the working member.

SEE OR SEARCH CLASS

73, Measuring and Testing,

250+, for meters having a distributing valve mechanism actuated by the piston, piston rod, or part rigidly attached thereto.