Patent ID: 9719503
Date: 2017-08-01
CPC Classifications: F04B

Claim:
1. A pumping apparatus comprising: two single-piece opposing members that are set along a longitudinal direction of a tube made of an elastic material such that the two opposing members oppose each other across the tube, wherein each of the opposing members has a groove whose shape does not change during operation, and the grooves meet to form a space that holds the tube in a cross section thereof, wherein the two opposing members in their entirety have reciprocal motion across a liquid holding position in which the tube in the space is full of liquid and between two liquid discharging positions in which the liquid is discharged from the tube due to deformation of a cross sectional shape of the tube, wherein the reciprocal motion includes a combined shuttle and move-in motion by which at least one of the two opposing members moves in an arc toward the other opposing member such that a part surrounding the groove of one of the opposing members moves into an inner space of the groove of the other opposing member.