US PATENT SUBCLASS 92 / 64
.~ One a flexible wall type

Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

61  DF  RELATIVELY MOVABLE WORKING MEMBERS {8}
64.~ One a flexible wall type

DEFINITION

Classification: 92/64

(under subclass 61) Apparatus in which one of said working members has at least a portion of the wall thereof formed of material which is pliable, and in which the flexing of said pliable material constitutes the movement of said working member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

36, for a bellows type expansible chamber device combined with a nonbellows type expansible chamber device.

48+, for plural flexible wall working members.