(19)
(11) EP 3 242 759 A1

(12)

(43) Date of publication:
15.11.2017 Bulletin 2017/46

(21) Application number: 16735532.0

(22) Date of filing: 09.01.2016
(51) International Patent Classification (IPC): 
B21D 28/24(2006.01)
B32B 3/10(2006.01)
B32B 38/04(2006.01)
 B29C 55/02(2006.01)
B32B 3/24(2006.01)
(86) International application number:
PCT/US2016/012770
(87) International publication number:
WO 2016/112369 (14.07.2016 Gazette 2016/28)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 09.01.2015 US 201562101852 P
20.02.2015 US 201562118830 P

(71) Applicants:
  • President and Fellows of Harvard College
    Cambridge, MA 02138 (US)
  • Booth-morrison, Christopher
    Otterburn Park, Québec J3H 1B1 (CA)
  • Farhangi, Mehran
    Montréal, Québec H3X 2B5 (CA)
  • Pham, Minh Quan
    Saint-Laurent, Québec H4L 3Y2 (CA)

(72) Inventors:
  • BOOTH-MORRISON, Christopher
    Otterburn Park, Québec J3H 1B1 (CA)
  • FARHANGI, Mehran
    Montréal, Québec H3X 2B5 (CA)
  • PHAM, Minh Quan
    Saint-Laurent, Québec H4L 3Y2 (CA)
  • JAVID, Farhad
    Somerville, Massachusetts 02143 (US)
  • BERTOLDI, Katia
    Somerville, Massachusetts 02143 (US)
  • TAYLOR, Michael, James
    Medford, Massachusetts 02155 (US)

(74) Representative: Lucey, Michael et al
PurdyLucey Intellectual Property 6-7 Harcourt Terrace
D2 Dublin
D2 Dublin (IE)

   


(54) AUXETIC STRUCTURES WITH DISTORTED PROJECTION SLOTS IN ENGINEERED PATTERNS TO PROVIDE NPR BEHAVIOR AND IMPROVED STRESS PERFORMANCE