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. 22, 2017
Filed:
Jan. 30, 2014
Husqvarna Ab, Huskvarna, SE;
Ludvig Sjöholm, Gränna, SE;
HUSQVARNA AB, Huskvarna, SE;
Abstract
A robotic work tool system () comprising a signal generator (), a boundary wire () and a robotic work tool (), said boundary wire being adapted to demark a work area (), said signal generator () being arranged to transmit a control signal () through said boundary wire (), and said robotic work tool () comprising at least one sensor () for detecting said control signal () being transmitted through the boundary wire (). The robotic work tool system () is characterized in that said pulse signal () comprises at least one first pulse train () being transmitted at a first amplitude (C) and at least one second pulse train () being transmitted at a second amplitude (C), wherein said first amplitude (C) and second amplitude (C) being arranged so that said first amplitude (C) is greater than said amplitude level (C) and a sum of the amplitudes (C, C) for all pulse trains () over time falls below a threshold value.