US PATENT SUBCLASS 91 / 218
CYCLICALLY OPERABLE

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

218CYCLICALLY OPERABLE {34}
219  DF  .~> With dwell
220  DF  .~> With condition responsive stop means {1}
222  DF  .~> Distributor in piston (422) {6}
230  DF  .~> Codirectional separately supplied working members {1}
232  DF  .~> Valveless distribution {2}
235  DF  .~> Working chamber receives controlled motive fluid supply from opposed chamber having constant supply (321) (417)
236  DF  .~> Multiple exhaust passages (e.g., compression control) {5}
245  DF  .~> Clearance control
246  DF  .~> Correlated throttle valve and distributor
247  DF  .~> Timing control by relative adjustment of plural movable fluid control elements {3}
264  DF  .~> Relatively movable serial distributors
265  DF  .~> Relatively movable inlet and exhaust valves {6}
274  DF  .~> With independent throttle adjustment for one side of double-acting motor
275  DF  .~> Electrically or magnetically actuated or adjusted distributor (459)
276  DF  .~> Distributor forms traversed movable portion of working chamber wall (423)
277  DF  .~> Adjustable working member reversal position (e.g., stroke control) {2}
280  DF  .~> Pulsator-actuated distributor (460)
281  DF  .~> Working member controlled motive fluid for distributor motor {12}
321  DF  .~> Motive fluid constantly applied to one working member face (235) (417)
322  DF  .~> With independently operable means to lock distributor
323  DF  .~> Relatively movable distributors for opposed working chambers {1}
325  DF  .~> Working member controlled inlet or exhaust port (e.g., semi-valveless)
326  DF  .~> Distributor moves transverse and parallel to same line
327  DF  .~> Distributor moves about axis parallel to working member reciprocatory path
328  DF  .~> Distributor peripherally engages (1) working chamber wall, or (2) cylinder between opposed working faces
329  DF  .~> Distributor located in cylinder between spaced working faces
330  DF  .~> With independently operable means to move or means to adjust movement of distributor {1}
335  DF  .~> With throttle valve or distributor throttle adjustment {1}
337  DF  .~> With means independent of distributor reversing parts to cyclically hold distributor {1}
339  DF  .~> Oscillating working member {1}
341 R  DF  .~> Distributor actuator extends into working chamber {3}
344  DF  .~> Biasing means moves distributor after predetermined travel (i.e., snap action) {2}
348  DF  .~> Distributor actuator between space piston faces {1}
350  DF  .~> Working member reverses distributor through part movable relative to both {4}

DEFINITION

Classification: 91/218

(under the class definition) Apparatus in which the motor has a cycle of operation in which the working member moves in one direction, reverses its direction of movement and returns to the original position, so as to be in condition to repeat the operation, and in which a distributor or other means, operated as a consequence of motor working member movement or cyclic change of pressure in a working chamber, is provided to control the flow of motive fluid so as to cause the motor, when started, to continuously repeat the cycle of operation.

(1) Note. A motor, in which the described operation is cyclic, will be classified under this definition if (1) cyclic operation necessarily results from the structural relationship of the claimed motor elements (e.g., valveless motor), (2) an element of the fluid or mechanical connection between the working member and a cyclically operated distributing means is claimed, or (3) features, considered peculiar to cyclically operable motors, are claimed, specifically, in the Search This Class, Subclass notes below that refer to this (1) Note.

(2) Note. In a cyclically operable motor the term distributor is defined as a means which comprises or includes a part which is movable relative to the working member of the cyclically operable motor to control a motive fluid port or passage in such a manner as to cyclically control inlet and/or exhaust flow of motive fluid to or from the motor. The distributor need not entirely cut off the motive fluid flow, but may cyclically control the amount of flow (i.e., throttling).

SEE OR SEARCH THIS CLASS, SUBCLASS:

2, for expansible chamber motors including means to stop or control the motor after a predetermined number of cycles or revolutions.

7, for expansible chamber motors which are caused to operate cyclically by supplying fluid to a working chamber thereof through one path and caused to operate selectively through a partial or full stroke by supplying fluid to said working chamber through a different path. 8+, for cyclically operable expansible chamber motors of the semi-compound type.

12+, for cyclically operable expansible chamber motors having means to reverse the inlet and exhaust porting to cause reverse operation thereof.

16+, for cyclically operable expansible chamber motors which operate on low pressure fluid when drifting or coasting.

39+, for expansible chamber motors having independent means to drive the distributor to cause the motor to continuously reciprocate.

50, for cyclically operable expansible chamber motors in which motive fluid is constantly applied to a working chamber and controllably vented therefrom.

152+, for cyclically operable expansible chamber motors of the multiple expansion type.

191+, for expansible chamber motors having relatively movable working members in which each cyclically controls another (e.g., duplex).

236, for exhaust through a plurality of controlled exhaust flow paths (as per the (1) Note above).

237, for adjustable timing control (as per the (1) Note above).

245, for clearance control (as per the (1) Note above).

246, for fluid flow control by correlated throttle valve and distributor (as per the (1) Note above).

264, for separate control of starting and stopping of fluid flow in inlet or exhaust flow path by plural control elements (as per the (1) Note above). 267, for exhaust control by lost motion drive of exhaust valve by inlet valve to provide delayed opening and/or closing of exhaust flow path with respect to inlet valve movement (as per the (1) Note above).