US PATENT SUBCLASS 212 / 238
.~.~.~ Fluid actuated ram


Current as of: June, 1999
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212 /   HD   TRAVERSING HOISTS

223  DF  HAVING HORIZONTALLY SWINGING BOOM OR BRIDGE {9}
232  DF  .~ And vertically swinging {6}
237  DF  .~.~ Including means to swing boom vertically {2}
238.~.~.~ Fluid actuated ram


DEFINITION

Classification: 212/238

Fluid-actuated ram:

(under subclass 237) Apparatus wherein the motor comprises a relatively reciprocating piston and cylinder actuated by fluid pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

261, for a fluid-actuated vertically swinging boom where no horizontal swinging is claimed.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

115, for miscellaneous elongated members which are pivoted relative to a supporting base by a fluid pressure actuated mechanism.