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. 30, 2005
Filed:
Jul. 31, 2003
Mathieu Noe, Ballancourt, FR;
Mathieu Noe, Ballancourt, FR;
Hutchinson, Paris, FR;
Abstract
The invention provides a dynamic beater comprising a spring-mass unit, said unit having a mass M and a stiffness K actuated by a drive motor and presenting a device for coupling to a host structure for damping, the beater presenting a first acceleration sensor secured to said mass and delivering a first signal s, and a second acceleration sensor for mounting on the host structure and delivering a second signal s, and also having a power amplifier supplying an output signal for controlling the drive motor in response to an input signal E which is a function of a difference between the signals from the first and second acceleration sensors after passing at least one of said signals through at least one lowpass filter and/or phase delay type filter.