US PATENT SUBCLASS 92 / 200
.~.~ Split annular type spring (198)


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92 /   HD   EXPANSIBLE CHAMBER DEVICES

172  DF  PISTON {19}
193  DF  .~ With spring means for biasing side wall portion radially {4}
200.~.~ Split annular type spring (198)


DEFINITION

Classification: 92/200

(under subclass 193) Apparatus in which the spring device comprises a discontinuous ring-like element made of resilient material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

198, for an open ended skirt-type piston in which the skirt is radially biased by means of a split annular type spring. Note "Statement Relating To Placement Of Patents Involving Combination And Subcombination Subclasses" of the Class Definition and the paragraph following the title in the schedule of this class.