US PATENT SUBCLASS 91 / 191-- .~.~ Each cyclically controls another (e.g., duplex)

US PATENT SUBCLASS 91 / 191
.~.~ Each cyclically controls another (e.g., duplex)

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}
189 R	DF	.~ Position of one working member controls motive fluid for another {3}
191		.~.~ Each cyclically controls another (e.g., duplex) {4}
192	DF	.~.~.~> With three or more working members
193	DF	.~.~.~> Fluid operated valve controlled by relatively movable working member
194	DF	.~.~.~> Rotating output shaft type (e.g., locomotive or reversing means)
195	DF	.~.~.~> With self-control

DEFINITION

Classification: 91/191

(under subclass 189) Apparatus in which each working member actuates a valve means controlling another working member in successive fashion to provide cyclic operation (e.g., "duplex" motor).

SEE OR SEARCH THIS CLASS, SUBCLASS:

153+, for expansible chamber motors in which a second working chamber is expanded by motive fluid exhausting from a first working chamber while said first working chamber is isolated from the working fluid supply.

SEE OR SEARCH CLASS

73, Measuring and Testing,

243, for meters having plural piston type working members and cylinders wherein the movement of each piston actuates the valving for another, and subclass 264 for similar meters wherein the working members are of the diaphragm or collapsible wall type.