Patent ID: 6752527
Filing Date: 2004-06-22
Classification: B01F

Abstract:
A light inexpensive cross used in mixers for concrete, mortar and similar materials, characterised in that it features a metal structure obtained with oxygen lance cutting technique, composed of three spokes (2, 22) projecting at 120Â° from a central hub (3), with each spoke provided on the external end with four holes with vertical axis (4) spaced at 90Â° for the passage of four bolts with vertical axis (4a) designed to engage into threaded holes (5b) located on the â€œcrossâ€  head (5a) of a blade-holding arm (5) when the blade-holding arm (5) touches the lower side of the spoke (2, 22); it being provided that the rectilinear ending section (5d) has a series of through holes with horizontal axis (5e) that allow for fixing with bolts (7) and nuts (7a) the vertical tang (6b) of a mixing blade (6), which, in turn, is provided with suitable through slots (6a) that permit the adjustment in height with respect to the ending section (5d) of the bearing arm (5); it being provided that an elastically deformable plastic insert (8) is mounted in intermediate position between the tang (6b) of the blade (6) and the ending section (5d) of the bearing arm (5).