Abstract: A battery operated concrete saw system (10) includes an electric saw (12) and a lithium based battery pack (58) including a plurality of batteries (60) connected in series to power the saw with at least 80 volts.

Abstract: A battery operated concrete saw system (10) includes an electric saw (12) and a lithium based battery pack (58) including a plurality of batteries (60) connected in series to power the saw with at least 80 volts.

Abstract: A battery operated concrete saw system (10) includes an alternating current electric saw (12) and a lithium based battery pack (58) including a plurality of batteries (60) connected in series to power the saw through an inverter (70) that changes the direct current from the battery pack to alternating current that powers the saw.

Abstract: A battery operated concrete saw system (10) includes an alternating current electric saw (12) and a lithium based battery pack (58) including a plurality of batteries (60) connected in series to power the saw through an inverter (70) that changes the direct current from the battery pack to alternating current that powers the saw.

Abstract: A battery operated concrete saw system (10) includes an electric saw (12) and a battery pack cart (14) as well as an electrical cord (62) for facilitating cutting in small places with a battery pack cart at a remote location.

Abstract: A battery operated concrete saw system (10) includes an electric saw (12) and a battery pack cart (14) as well as an electrical cord (62) for facilitating cutting in small places with a battery pack cart at a remote location.

Abstract: A concrete saw (10) has an electric motor (24) energized by a battery pack (34) to drive a pair of saw arbors (42) and a battery powered transmission (30) drives rear wheels (16) that provide self propulsion of the saw in cooperation with front wheels (20). A power operated actuator (54) raises and lowers the front wheels (20) to provide upward and downward movement of the saw frame (14) about its rear wheels (16). The battery pack (34) may be lead acid batteries, nickel-cadmium batteries, nickel metal hydride batteries or lithium batteries, and the electric motor (24) has 5 to 15 horsepower, preferably about 10 horsepower, to provide cutting of most conventional concrete jobs.

Abstract: A portable boring machine for cutting holes in a cutting surface is provided. The portable boring machine includes a vacuum system to secure a front end of the portable boring machine to a cutting surface, a hydraulic boring sub-assembly, which includes a hole saw to cut holes in the cutting surface, a water cooling/lubrication system to provide cooling and/or lubrication to the hole saw during the cutting process, and a control system to control the operation of the portable boring machine. The portable boring machine also includes multiple power-driven wheels. The wheels are attached to a bottom portion of a frame and are powered by an engine, which is mounted within the frame.

Abstract: A concrete saw (10) has an electric motor (24) energized by a battery pack (34) to drive a pair of saw arbors (42) and a transmission (30) to rear wheels (16) that provide self propulsion of the saw in cooperation with front wheels (20). A power operated actuator (54) raises and lowers the front wheels (20) to provide upward and downward movement of the saw frame (14) about its rear wheels (16). The battery pack (34) may be lead acid batteries, nickel-cadmium batteries, nickel metal hydride batteries or lithium batteries, and the electric motor (24) has 5 to 15 horsepower, preferably about 10 horsepower, to provide cutting of most conventional concrete jobs.

Abstract: A portable boring machine for cutting holes in a cutting surface is provided. The portable boring machine includes a vacuum system to secure a front end of the portable boring machine to a cutting surface, a hydraulic boring sub-assembly, which includes a hole saw to cut holes in the cutting surface, a water cooling/lubrication system to provide cooling and/or lubrication to the hole saw during the cutting process, and a control system to control the operation of the portable boring machine. The portable boring machine also includes multiple power-driven wheels. The wheels are attached to a bottom portion of a frame and are powered by an engine, which is mounted within the frame.

Abstract: A concrete cutting saw (10) includes a wheeled main frame (12) on which a blade support frame (14) is mounted for movement between upper idle and lower cutting positions. Low and high speed blade arbors (16, 18) are rotatably mounted on the blade support frame (14) and each has an arbor head (24, 26) for selectively and alternately mounting either a low or high speed rotary cutting blade without any blade interference with the other arbor head. A drive mechanism (32) rotatively drives the low and high speed blade arbors (16, 18) at low and high speeds such that concrete cutting can be performed at the best rotational speed for the particular job cutting to be performed.