The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2013
Filed:
Jul. 14, 2009
Zlatko Maric, Traunstein, DE;
Volker Hoefer, Palling, DE;
Zlatko Maric, Traunstein, DE;
Volker Hoefer, Palling, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
An angle-measuring device including a first component group and a second component group, the component groups being disposed in a manner allowing rotation relative to each other by a bearing. The first component group includes a housing having a connecting device, as well as a scanning unit. The second component group includes a shaft to which a code disk is attached, and a flow channel having a directional component parallel to the axis. The angle-measuring device is configured such that a negative pressure is able to be applied to the connecting device, so that a fluid surrounding the angle-measuring device with a pressure flows through the angle-measuring device to remove contaminants by suction. At the applied negative pressure, a first mass flow of the fluid which flows through the flow channel is greater than a second mass flow which flows through the bearing gap.