Patent GB-713986-A (GB)
Title: Improvements in decorticators for hulling grains
IPC: B02B3/08
Filed: 1952-03-25
Abstract: 713,986. Decorticating machines. GRIMARD, E. March 25,1952 [April 27, 1951], No. 7627/52. Class 58 In a decorticator of the type comprising a vertical cylindrical vessel in which revolves a vertical shaft on which is fixed at least one socket or rotor element carrying rubbing members (which may be detachable and interchangeable), the socket or rotor element is provided at its periphery and at different levels with two sets of arms extending in radial directions, some of these arms being provided with rubbing members in the form of vertical pegs and others provided with rubbing members in the form of vertical blades or vanes inclined at an angle to the radius of the respective arm. As shown the vertical shaft 9 is provided with a series of sockets 1 each with a number of radial arms 2, 2' in the form of flat bars fixed on an incline and at two different levels, preferably with the arms 2 in the higher level, each arm extending from the socket 1 in a radial sense but inclined in relation to the vertical axis of the socket, the arms 2 being provided with vertical, cylindrical pegs 4, 6 and passing transversely therethrough and which may be all of equal height on either side of the arm 2, like the pegs 4, or may be fixed at different heights in relation to the inclined plane of the corresponding arm, like the pegs 6 the arms 2' being provided with flat blades or vanes 3 disposed vertically and inclined at an angle to the arm and a bottom socket 1a with arms 2a, 2a<SP>1</SP> extending perpendicularly to the axis and preferably with its arms set square to the .axis and provided respectively with pegs and blades. The sockets are separated from one another by fixed baffles in the form of cones each comprising a conical wall 29 forming a collector, its outer periphery having one or more passages 30 for the discharge of the material which has entered the vessel at 16 and passed through the aperture 28 in the funnel 27, onto a lower conical wall 31, which brings back the material towards the centre where it falls again through an opening 32 onto the next socket 1 carrying conical elements, this outward and inward travel of the material being repeated on the following stages. The baffle walls 29, 31 are connected by distance pieces 33 but these may be dispensed with, the baffles being fixed separately to the interior of the vessel by means of brackets 34. The material is discharged from the bottom of the vessel through a tangential opening 19 regulated by a register 19a controlled from the exterior in order to regulate the delivery into the discharge conduit 18 from which the husks of the dehulled grain may be removed by suction. An arm 2 or 2a carrying pegs 4, 6 alternates in circumferential direction with an arm 2<SP>1</SP> or 2a<SP>1</SP> carrying blades or vanes 3. The sockets are staggered in relation to one another in the circumferential direction. In another modification (Fig. 7, not shown) the rotor elements are all of the straight type similar to the bottom one of the previous modification and are spaced from one another by sleeves, no baffles on the inside of the vessel being provided in this case.