PERISTALTIC PUMP Russian patent published in 1997 - IPC

FIELD: pumping viscous liquids, inhomogeneous liquids, including mortars and concrete solutions. SUBSTANCE: working member in the form of a hose is installed on the body. The drive is made in the form of gear unit comprising sun gear and planetary gears coupled to the displacing rollers. Working member is adjustable and secured to flat support surface made on the body. Gear unit is bi-planetary with parallel axles. At least 2n cranks with drive planetary gears on crank necks are installed on the carrier. Planetary gears are uniformly installed over the circle and are interconnected in pairs to sun gear through idler wheel. Crank length is A = XR, where R is the distance between sun gear center and crank neck; X is the value dependable on "n" multiplicity of the bi-planetary unit, and with X = 3, 4, 5, 6 X = 0.3, 0.13, 0.075, 0.6, respectively. Ratio of number of teeth on idler gears to those on drive gears does not exceed two. Axles of a pair of drive planetary gears are placed in general plane, being perpendicular to the plane passing through the axles of sun gear and idler gear. At least one displacing roller is installed on the eccentric neck of a crank so as to be revolved in free fashion. The pump is provided with at least one additional support surface to interact with the displacing rollers. The surface is installed so as to be adjustable. Sun gear axle is installed so as to be revolved in free fashion, and equipped with a device ensuring revolution stopping, for instance, carrier and adjustable stops. EFFECT: higher productivity, capacity. 3 dwg