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:
Jan. 23, 2001
Filed:
Aug. 18, 1999
Detlef Mattinger, Bickenbach, DE;
Martin Liebeck, Darmstadt, DE;
Wella Aktiengesellschaft, Darmstadt, DE;
Abstract
The electric haircutting machine includes an electrical drive motor, cutting blades driven by the drive motor, a device (,) for oiling the cutting blades and a device (,) for detecting an oil deficiency of the oil lubricating the cutting blades. The device (,) for oiling the cutting blades is connected with and responsive to the device (,) for detecting the oil deficiency, whereby the device for oiling the cutting blades is automatically activated to oil the cutting blades when the oil deficiency is detected. The device for detecting the oil deficiency detects whether or not motor current consumption, cutting blade vibration noise, haircutting machine sound level, cutting blade temperature, force acting on one of the cutting blades or drive motor rotation speed exceeds a corresponding predetermined threshold or not in order to establish the presence or absence of the oil deficiency.