| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 219640000 | Gear | 6 |
| 20090020525 | Electric Induction Heat Treatment - An induction coil with inner and outer coil segments joined together by a transition segment is arranged so that the outer coil segment generally inductively heat treats an annular outer region of a workpiece positioned under the coil, the inner coil segment generally inductively heat treats an annular inner region of the workpiece, and the transition segment traverses at least a portion of the width of the overall annular region of the workpiece to be heat treated. Relative arrangement of inner, outer and transition coil segments provides for controlled induction heat treatment across the overall annular region such as the gear teeth region of an intersecting axes or non-intersecting and non-parallel axes gear. | 01-22-2009 |
| 20110147373 | Device for Hardening the Teeth of Gear Wheels by Individual Inductive Heat Treatment for Each Tooth, Using Several Inductors - A device for hardening the teeth ( | 06-23-2011 |
| 20110155722 | INDUCTIVE HEATING FOR HARDENING OF GEAR TEETH AND COMPONENTS ALIKE - An apparatus ( | 06-30-2011 |
| 20120160832 | GEAR PART AND METHOD OF PRODUCING THEREOF - A gear part has a quench hardened layer around the teeth surface thereof. The gear part is made of a steel containing carbon of 0.43 to 1.2 wt %, and a relationship between a DI value and a module M (mm) of the gear part satisfies an expression of DI≦0.12×M+0.2. An alloy element concentrates in the cementite phase in a pretreated steel, thereby causing concentration of the alloy element in the ferrite phase in the pretreated steel to decrease, and a rapid induction heating to A3 transformation temperature or Acm transformation temperature causes carbon of 0.3 to 0.8 wt % to diffuse and dissolve in the austenite phase, and the DI value is determined by using a concentration of the alloy element and a concentration of the carbon. The alloy element is one or more elements selected from the group consisting of Mn, Cr, Mo, V and the like. | 06-28-2012 |
| 20130240506 | INDUCTION HARDENING SYSTEM AND METHOD - A system and method of induction heat treating a gear includes a workstation. The workstation has a power source, an inductor coil, and a rotational mechanism. The gear is induction heat treated at a first portion of the gear and a second portion of the gear remains untreated by induction hardening. The gear has an inner surface. The inner surface includes the first portion and the second portion. The first portion has a first width. The second portion has a second width. The inductor coil includes at least one heating loop and at least one non-heating loop. The inductor coil is energized to a predetermined frequency to create an alternating magnetic field, where the alternating magnetic field developed in the heating loop induces an eddy current in the first portion of the gear. | 09-19-2013 |
| 20150319810 | INDUCTION HEAT TREATMENT OF AN ANNULAR WORKPIECE - Apparatus is provided for inductively heat treating a circular surface of annular workpieces where at least one inductor pair is used to perform a scan induction heat treatment of the circular surface. Controlled movement of the inductors and application of quenchant is provided particularly at the initial and final heat treatment locations on the circular surface to enhance metallurgical uniformity of the annular workpiece at these locations. In combination with controlled movement of the inductors, a simultaneous power-frequency control scheme can be applied to the inductors during the heat treatment process with the apparatus. | 11-05-2015 |
