US Patent No. 10,989,569


Patent No. 10,989,569
Issue Date April 27, 2021
Title Bearingless Angular Measurement Device
Inventorship Josef Thaler, Traunreut (DE)
Erich Strasser, Trostberg (DE)
Assignee DR. JOHANNES HEIDENHAIN GmbH, Traunreut (DE)

Claim of US Patent No. 10,989,569

1. A bearingless angular measurement device, comprising:an angle scale;
a scanning unit;
a compensation coupling; and
an evaluation electronics;
wherein the scanning unit and the angle scale are located at a scanning distance relative to each other and are rotatable relative to each other about an axis;
wherein the scanning unit is adapted to generate angle-dependent output signals, the evaluation electronics adapted to process the output signals, the angular measurement device adapted to determine the scanning distance based on the output signals;
wherein the compensation coupling is attachable to a machine component and is elastically deformable in a direction of the axis;
wherein the machine component includes a brake pad of a brake of an electric motor; and
wherein an activation state of the brake is ascertainable based on the determined scanning distance and/or a wear state of the brake is determinable based on the determined scanning distance.