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. 28, 2007
Filed:
Dec. 23, 2004
Ranjith Divigalpitiya, London, CA;
Pei-jung Chen, London, CA;
David A. Kanno, London, CA;
Gabriella Miholics, London, CA;
Vijay Patel, London, CA;
Matthew T. Scholz, Woodbury, MN (US);
Ranjith Divigalpitiya, London, CA;
Pei-Jung Chen, London, CA;
David A. Kanno, London, CA;
Gabriella Miholics, London, CA;
Vijay Patel, London, CA;
Matthew T. Scholz, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A force sensing membrane comprises (a) a first conductor that is movable toward a second conductor; (b) a second conductor; and (c) a composite material disposed between the first and second conductors for electrically connecting the first and second conductors under application of sufficient pressure therebetween; and (d) means for measuring dynamic electrical response across the force sensing membrane, the composite material comprising conductive particles at least partially embedded in an elastomeric layer, the conductive particles having no relative orientation and being disposed so that substantially all electrical connections made between the first and second conductors are in the z direction, and the elastomeric layer being capable of returning to substantially its original dimensions on release of pressure.