Patent ID: 8839778

Claim:
A portable, hydraulically-powered horizontal concrete saw comprising: a rigid metal frame having a forward half and rearward half, the rearward half comprising a shaft collar for receiving a rearward grip assembly; a hydraulic drive system for driving a mounted circular saw blade in a substantially horizontal orientation; the mounted circular saw blade having an upper face towards the rigid frame and a lower face opposite the upper face; a planar shield affixed to the rigid frame, the shield covering a portion of the upper face of the circular saw blade; an arbor traversing the planar shield, the arbor driven by the hydraulic drive system; a water-cooled hub driven by the arbor, the water-cooled hub arranged to mount the circular saw blade so that no rigid saw mounted features extend below the lower face of the circular saw blade and defining a plurality of apertures on the hub outer surface for dispersing the water across the upper face of the circular saw blade; a hollow, tubular forward handle affixed to one of the rigid frame and the shield for gripping the forward half of the saw and operating the saw with the circular saw blade it in a substantially horizontal orientation; the rearward grip assembly affixed to the rearward half of the rigid frame, the rearward grip assembly comprising: a trigger housing defining a hollow interior recess for housing one of a 12 volt electric switch and a hydraulic value; a trigger for activating the hydraulic drive system, the trigger configured to activate one of the 12 volt switch and the hydraulic valve when depressed, the switch and the valve activating the hydraulic drive system; a trigger guard partially enveloping the trigger; an elongated shaft affixed to the trigger housing, the elongated shaft for gripping the rearward half of the saw, the shaft elongated along a longitudinal axis, the shaft coupled to the rigid frame with the shaft collar such that the shaft and the rearward grip assembly can be axially rotated around the longitudinal axis of the shaft within the collar.