Patent ID: 6102022
Filing Date: 2000-08-15
Classification: B28D,F16D

Abstract:
A pavement cutting machine comprising:(a) a frame having a handle that is grasped during operation, said frame having a longitudinal axis;(b) a pair of spaced apart wheels carried by said frame for supporting the pavement cutting machine on a pavement surface and enabling the pavement cutting machine to be moved;(c) a rotary pavement cutting wheel for engaging and abrading said pavement surface, said cutting wheel 1) carried by said frame in operable communication with a driven shaft that is operably associated with a first pulley, 2) comprising a pair of spaced apart discs with a plurality of pairs of replaceable and circumferentially spaced apart star-shaped cutting elements, wherein each said cutting element is constructed and arranged to engage said pavement surface, 3) having an axis of rotation that is generally transverse to the longitudinal axis of said frame, and 4) weighing at least fifty pounds;(d) an internal combustion engine carried by said frame and having a drive shaft that extends generally transversely relative to the longitudinal axis of said frame;(e) an electromagnetic clutch connected directly to said drive shaft of said internal combustion engine and operably associated with a second pulley;(f) a belt linking said first pulley and said second pulley;(g) a supply of electrical power electrically connected to said electromagnetic clutch;(h) an electric deadman's switch operably associated with said handle that controls application of electrical power from said supply of said electrical power to said electromagnetic clutch; and(i) wherein 1) said pavement surface comprises one of concrete and asphalt, 2) wherein application of electrical power from said supply of said electrical power to said electromagnetic clutch energizes said electromagnetic clutch coupling said internal combustion engine with said cutting wheel, 3) wherein said deadman's switch deenergizes said electromagnetic clutch when said handle is released, and 4) impact of the cutting elements of the cutting wheel with said pavement surface self-propels the machine relative to said pavement surface.