.~.~> Deformation by rolling or sliding engagement member {1}
DEFINITION
Classification: 417/474
(under subclass 437) Apparatus comprising a relatively long pumping chamber, said chamber having one of its walls formed of flexible material and means for collapsing said flexible
wall either progressively or sequentially in a direction along the length of the chamber, the collapsing of said chamber wall serving to control the inlet of pump fluid to or the discharge of pump fluid from said chamber.
(1) Note. A flexible chamber wall pump which is directly deformed by a rigid element having a planetating or nutating motion is excluded under this definition, such subject matter being classified in Class 418. For the definition of planetary or nutating motion, see Class 418, subclasses 49 and 54, respectively. A roller mounted on a rotating arm is not considered to comprise planetary movement.
SEE OR SEARCH CLASS
418, Rotary Expansible Chamber Devices,
56, for a nonmetallic working member having planetary movement, and subclasses 153+ for a rotary expansible chamber pump or motor having a resilient, nonmetallic working member.
