MINUTE AMOUNT DISCHARGE PUMP BY ANNULAR RECESSED GROOVE

摘要

PROBLEM TO BE SOLVED: To reduce size of a liquid pump for minute-amount discharge, to facilitate its portability, and to easily attach, detach and replace a pump part.;SOLUTION: A pump chamber is comprised of an annular recessed groove of which section area in a radial direction is an arc shape and a flat and rubber-like elastic plate or membrane. A clearance is provided at its center part for opening an intake port and an annular groove and a discharge port are provided at outside of the annular recessed groove to form the pump. Pump action is performed by pressing the elastic plate and the elastic membrane into the annular recessed groove by a pressure table having an annular projection of a substantially same form as the annular recessed groove. As its driving device, the plurality of steel balls are held by a holding frame at equal intervals and its both sides are received by grooves for rolling. The grooves are depth variable grooves wherein the depth of one of the grooves is varied at equal intervals as much as the steel balls. One side of the table for pinching the steel ball is provided as a turning table and the other side is provided as a pressing table for pressing the elastic plate and the membrane. The pressing table always presses in a rotating table direction with a spring. The turning table only turns and its axial movement is restricted and the pressing table is restricted to turn and movable only in an axial direction. When the turning table turns, the steel balls roll half rounds of the number of the steel balls, for example, if there are three balls, they roll two rounds and the pressing table reciprocates substantially three times as much as depth variation quantity of the depth variable groove and drives the pump.;COPYRIGHT: (C)2009,JPO&INPIT