Patent ID: 6561287
Filing Date: 2003-05-13
Classification: B28D

Abstract:
A method for improving the rate at which a portable cutting device drills or cuts a selected material from the group consisting of concrete, granite, sandstone, or fired brick, said cutting device comprising a tool having cutting elements for cutting or drilling said selected materials and a powered driver for driving said tool, said method comprising the following steps:(A) providing a water-powered pump comprising (1) a water-powered motor having a flow-through passageway, and inlet and outlet ports communicating with said passageway, and (2) an injection pump connected to and driven by said water-powered motor, said injection pump having inlet and outlet ports and being adapted to pump a liquid introduced at its said inlet port to its said outlet port at a rate that is a function of the rate at which water flows in said flow-through passageway; (B) coupling said water-powered pump to said cutting device by (a) connecting said inlet port of said water-powered motor to a source of water under pressure via a first conduit, (b) connecting said outlet port of said water-powered motor to said cutting device via a second conduit so that water discharged from said outlet port of said water-powered motor will wet said tool, (c) connecting said inlet port of said injection pump to a supply of a liquid additive that enhances the cutting or drilling performance of said tool, and (d) connecting said outlet port of said injection pump via a third conduit to said second conduit; and (C) while said cutting device is being operated and engaged in cutting or drilling said selected material, operating said water-powered pump by passing a stream of water under pressure from said source through said passageway via said inlet and outlet ports of said water-powered motor, so that simultaneously (1) said stream of water will be delivered to said cutting device and (2) a limited quantity of said liquid additive will be injected by said injection pump into said second conduit via said third conduit, whereby the cutting or drilling of said selected material by said tool is enhanced by the presence of said additive in said stream of water.