Device for the metering of granular or powdered products
AssigneeSedepro
InventorMichel Deal
Life of this patent
Estimating the term…
Abstract
The material to be metered fills the cylinder 1 when it is in front of the admission orifice 31, whereupon the cylinder 1 moves opposite the delivery orifice 32 where the piston 2 describes a movement towards top dead center in order to eject said material out of the cylinder 1. The cylinder 1 then moves towards the admission orifice while the piston 2 remains at top dead center to avoid any return flow, whereupon the cycle starts over again.
Claims13
A metering device comprising a housing having admission and delivery ports, a body movable within the housing and having a cylinder formed therein, at least one piston sweeping a given swept volume which piston slides within the cylinder, the cylinder moving between the admission port in which the products to be metered fill said swept volume and the delivery port, which is different from the admission port and in which the products to be metered are evacuated from said swept volume, said piston being scraped by said housing when the piston leaves the delivery port, and force-feed means above the admission port which force-feed means includes means to supply the products to be metered to the admission port and a head pressing with constant force in the direction of feeding of the cylinder providing controlled compaction of the products within the cylinder.
A metering device comprising a housing, an oscillating body mounted for rotation within said housing, a cylinder within the body, at least one piston which slides within the cylinder sweeping a given volume of the cylinder, the oscillating body moving within the housing between an admission position in which the products to be metered fill said swept volume and a delivery position different from the admission position and in which the products to be metered are evacuated from said swept volume, the piston being scraped by the housing when the piston leaves the delivery position, the oscillating body having a rotary movement so that the cylinder describes a circular arc between the admission and delivery positions, an input shaft arranged within said oscillating body, concentrically with respect to the movement of the oscillating body in the housing, a rod and crank system connecting the input shaft and the piston to impart reciprocating movement to the piston, and coordinating means for controlling the movement of the oscillating body and coordinating the movement of the piston with respect to the oscillating body.
A metering device comprising a housing having admission and delivery ports, a body oscillating on an axis within said housing and having a cylinder formed therein, a piston movable within said cylinder and being presented alternately to said admission and delivery ports, a common drive for displacing the body relative to the housing and the piston relative to the cylinder, a cam driven by the common drive, an eccentric connecting the common drive and the piston and a cam controlled reciprocatory means mounted for reciprocation in the housing and connecting the common drive and the body for imparting movement to the body within the housing, the eccentric and cam coordinating the movement of the piston and the body so that the upper surface of the piston is scraped by the housing when the piston is moved from the delivery position toward the admission position.
Dependencies are inferred from the claim text.