Patent ID: 6220046
Filing Date: 2001-04-24
Classification: B23Q,H02K

Abstract:
Equipment for working a hard material comprises a housing (2), a driving motor (1) located within said housing (2), a tool (5) connected to said driving motor (1) and arranged to work the material, a cooling duct (3) located within said housing in a region about said driving motor and having an upstream end and a downstream end, a coolant supply source (6) for supplying coolant under pressure, a coolant supply pipeline (7) conveying coolant from said supply source (6) to said cooling duct (3), a first coolant discharge pipeline (13) connected to the downstream end of said cooling duct (3) and spaced from said tool (5), a cooling device (8) connected to said coolant supply pipeline (7), and an electronic component (9) associated with said cooling device (8).