UNIVERSAL REAMER Russian patent published in 1998 - IPC

FIELD: hole drilling machinery and equipment. SUBSTANCE: this is used in construction activities and especially in creating appropriate bore-holes for construction of cast-in-place piles. Reamer has two coaxially installed shafts. Mounted on these shafts are sliding sleeve and fixed sleeve. Pivotally connected to these sleeve is pantographic three-dimensional mechanism which is provided with ground-cutting blades. Both coaxially mounted shafts are made for possible fixing relative to each other and independent coupling with drilling shaft of drilling machine. Reamer is driven from drilling machine. External shaft of reamer is made for possible mounting at head of bore-hole with fixing against longitudinal displacement, thus allowing for making reamed hollows of various configuration. EFFECT: higher efficiency. 3 dwg