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:
Aug. 10, 1999
Filed:
Dec. 29, 1997
Mendel Kleiner, Hov.ang.s, SE;
Bjorn Riise, Sollentuna, SE;
Aktiebolaget Electrolux, Stockholm, SE;
Abstract
The present invention discloses a proximity sensing system and an autonomous device, like a vacuum-cleaner, being provided with a pair of independent driven wheels (17, 18). The device contains for the proximity orientation and guiding a microprocessor system and a sonar system which includes at least an ultrasonic transmitter and an ultrasonic receiver. An additional mechanical touch sensor is also used in the form of a forward directed bumper (16) carrying the transmitter as well as receiving microphone units. The mechanical bumper actuates at least one touch sensor if the device makes contact with an obstacle in the course of the moving device. The transmitter is a stripe-shaped ultrasound transducer (10) which is positioned at the front of the device and transmits ultrasonic waves with a narrow vertical distribution within a wide sector in front of the device. The receiver includes a number of microphone units (12) provided with hollow pipes (12a, 12b) for the sound. The microphone units (12) together with the transmitter form an efficient sonar system for detecting echoes reflected from objects in the forward course of the moving device.