(under the class definition) Apparatus having a structural unit consisting of a single working chamber whose surfaces include an external cylinder member, and internal cylindrical sleeve member slidable therein and a third member slidable in or on one of said members in such fashion that each of the members is movable relative to the others.
(1) Note. This subclass is intended to be the generic location of the structural unit defined above regardless of whether one or more of the members are (load engaging) working members or whether it is not clear from the disclosure which members are working members.
(2) Note. The intermediate cylindrical member may have an end wall or annular flange between itself and the external cylinder provided that said end wall is apertured to provide a continuous and uncontrolled flow of motive fluid therethrough.
(3) Note. The inner and outer cylinders may be axially spaced from each other provided that the outer cylinder is radially spaced a greater distance from a common axis than the inner cylinder.
(4) Note. An inner sleeve which may or may not be part of an inner cylinder, which shifts longitudinally within an outer cylinder for the purpose of controlling valve ports between the cylinder and the sleeve has been excluded where no significant work is performed by the outer cylinder over and above that performed during the shifting of the inner sleeve to actuate said valve ports.
(5) Note. Each of said members sealingly engages at least one of the other members.
SEE OR SEARCH THIS CLASS, SUBCLASS: 167+, for similar structures in which an end wall on a sleeve intermediate a cylinder and piston divides the organization into two chambers with separate control means for each which control means may include a valve in said end wall.
217, 276 and 423, for expansible chamber motors having inner and outer sleeves or cylinders which are relatively shifted axially to control valve ports for the inner cylinder or sleeve.
SEE OR SEARCH CLASS
92, Expansible Chamber Devices, 51+ for patents showing similar structures where valving is not claimed.
