Patent ID: 8419321
Filing Date: 2013-04-16
Classification: B28D,Y10T

Abstract:
1. A water feed apparatus for a core drill of a wet type that drills a hole in an object to be drilled by rotating a core body and feeds water to cutting blades provided on the core body, comprising: a water storage tank that stores water for feeding; a pump unit that feeds gas with a pressure to the water storage tank; and an adapter that couples the water storage tank, the pump unit, and the core drill to each other, wherein the pump unit has a gripper portion whose internal space is enlargingly and reducingly deformable by a gripping operation by an operator to feed the gas to the water storage tank, wherein the adapter includes a first adapter having a drill-mounting portion for mounting on the core drill, and a second adapter having a tank mounting portion by which the water storage tank is removably mounted to the adapter and a pump mounting portion by which the pump unit is mounted to the adapter, the first adapter and the second adapter include a water passage that connects the drill-mounting portion to the tank mounting portion, the first adapter includes a valve unit that opens and closes the water passage, and wherein the second adapter further includes an air passage through which the tank mounting portion and the pump mounting portion are connected to each other, and is rotatably connected to the first adapter so that a mounting direction of the water storage tank mounted to the tank mounting portion is changeable; and wherein the first adapter and the second adapter are coupled together by a flexible water flow tube; and including a carrying hook arranged to hang the water storage tank, the pump unit, and the second adapter on a body of an operator.