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:
Mar. 31, 2020
Filed:
Jan. 09, 2016
President and Fellows of Harvard College, Cambridge, MA (US);
Siemens Canada Limited, Oakville, CA;
Katia Bertoldi, Somerville, MA (US);
Fabian Enrique Sanchez Guerrero, Montreal, CA;
Farhad Javid, Somerville, MA (US);
François Jette, Longueuil, CA;
Minh Quan Pham, Saint-Laurent, CA;
Megan Schaenzer, Montreal, CA;
Ali Shanian, Montreal, CA;
President and Fellows of Harvard College, Cambridge, MA (US);
Siemens Canada Limited, Oakville, CA;
Abstract
Auxetic structures, low porosity auxetic sheets, systems and devices with auxetic structures, and methods of using and methods of making auxetic structures are disclosed. An auxetic structure is disclosed which includes an elastically rigid body with a plurality of apertures extending through the elastically rigid body and a plurality of protrusions projecting from the elastically rigid body. The apertures and protrusions are arranged in an engineered pattern, such as an array of rows and columns. The apertures are cooperatively configured with the protrusions to provide a predefined porosity while exhibiting stress reduction through negative Poisson's Ratio (NPR) behavior under macroscopic planar loading conditions. In some embodiments, the protrusions, which are elliptical or semispherical dimples, are interposed in square or hexagonal patterns with the apertures, which are S-shaped through slots or circular boreholes.