| Kabushiki Kaisha Miyanaga Patent applications |
| Patent application number | Title | Published |
|---|
| 20110182683 | CORE DRILL - Provided is a core drill which is capable of drilling a hole and consumes small electric power consumption when the core drill is applied to a codeless type electric drill. | 07-28-2011 |
| 20100226728 | Core Cutter - A core cutter includes a body portion 1 and a plurality of cutting blades 2 arranged at intervals in a circumferential direction. At least one of the cutting blades serves as an inner cutting blade, and the remaining cutting blades 2 serve as outer cutting blades. The thickness of the body portion maintains distortion resistance of the body portion. Through grooves penetrating a tip end of the body portion are formed toward a tip end side. The cutting blades are attached to the through grooves 3, and have the same size as the through groove 3. Gallets discharge the chips, with each of the gallets formed by an outer peripheral surface. The cutting blades are welded to the grooves such that a tip end portion coincides with a peripheral surface of an axial-direction tip end of the gallet. | 09-09-2010 |
| 20100127465 | Shank Attachment Device - A shank attachment device attaches a core drill to a rotating portion of a drill device and includes an arbor and a shank. The arbor is detachably attachable to the rotating portion. The arbor and the shank are detachably attachable to each other. The shank is detachably attachable to the core drill. A stopper engages a groove of the shank to stop a movement of the shank in an axial direction away from the arbor. A rotational torque of the arbor can be transmitted to the shank by engaging a first engaging portion of the arbor with a first engaged portion of the shank. The shank contacts the arbor to stop the movement of the shank in the axial direction toward the arbor. | 05-27-2010 |
| 20100007101 | Shank Attachment Structure - A shank attachment structure which may supply coolant even if a drill without a center pin is attached. A shank can be attached to a shank attachment hole with a single motion. The outer diameter of the shank can be inserted into the shank attachment hole. A chamfered portion is formed around an edge of a base end, and an elongated concave portion is formed on a tip end. A coolant hole is formed on a base end of the shank attachment hole, and a valve body is disposed in the hole. A sealing member is disposed adjacent to the tip end side. A first sleeve is disposed such that a base of the shank moves the first sleeve, so that a base of the sleeve separates from the sealing member; and when the shank is not in contact with the tip, an outer peripheral surface of the first sleeve moves the engaging member radially outwardly. | 01-14-2010 |
| 20100003093 | Hard Tip and Method for Producing the Same - The object of the invention is to provide a hard tip where the nose side has wear resistance and the bonding side has toughness. The chemical composition of sintered hard alloy constituting the hard tip is such that a compounding ratio of WC to Co is substantially the same from the nose side to the bonding side, and a first bonding metal or a second bonding metal has a gradient chemical composition wherein the content of the first bonding metal or the second bonding metal is increased from the nose side to the bonding side, the first bonding metal does not form the eutectic texture with WC, and the second bonding metal has the eutectic temperature with WC over the eutectic temperature of WC—Co sintered hard alloy and the melting point over the liquid phase sintering temperature of WC—Co sintered hard alloy. | 01-07-2010 |
| 20090172911 | Drill Dust Collector - Object: A drill dust collector is provided that is capable of drilling holes in an area ranging from a position near a corner to a position distant from the corner and that can be positioned with a side face in contact with an upright face such as a wall during drilling. | 07-09-2009 |
| 20090129878 | WATER FEED APPARATUS FOR CORE DRILL - A water feed apparatus ( | 05-21-2009 |
| 20090103994 | Drill Bit - An object of the present invention is to provide a drill bit whose drilling performance does not deteriorate and whose radially outer end of a blade tip is never chipped. A drill bit A comprises: a plurality of cutting blades | 04-23-2009 |
| 20080298915 | Core Drill - To provide a user-friendly core drill which, when forming a large-diameter cut hole by the core drill with respect to an object to be drilled, such as concrete, is able to easily form, for example, a chamfered portion or a countersunk portion with respect to an opening end portion of the cut hole. | 12-04-2008 |
| 20080279646 | Core Cutter - A core cutter that enables debris generated by cutting from inside of the core cutter to be easily discharged therefrom is disclosed. A core cutter comprising a core body | 11-13-2008 |
