US 12,203,015 B2
Dry adhesives and methods for making dry adhesives
Metin Sitti, Pittsburgh, PA (US); Michael Murphy, Pittsburgh, PA (US); and Burak Aksak, Pittsburgh, PA (US)
Assigned to Carnegie Mellon University, Pittsburgh, PA (US)
Filed by Carnegie Mellon University, Pittsburgh, PA (US)
Filed on Aug. 25, 2022, as Appl. No. 17/895,334.
Application 14/625,162 is a division of application No. 13/429,621, filed on Mar. 26, 2012, abandoned.
Application 17/895,334 is a continuation of application No. 14/625,162, filed on Feb. 18, 2015, granted, now 11,773,298.
Application 13/429,621 is a continuation in part of application No. 12/448,242, granted, now 8,142,700, issued on Mar. 27, 2012, previously published as PCT/US2007/025683, filed on Dec. 14, 2007.
Claims priority of provisional application 60/874,850, filed on Dec. 14, 2006.
Prior Publication US 2022/0411664 A1, Dec. 29, 2022
Int. Cl. B81C 1/00 (2006.01); B29C 33/38 (2006.01); B82Y 10/00 (2011.01); B82Y 40/00 (2011.01); C09J 7/00 (2018.01); G03F 7/00 (2006.01); B29L 31/00 (2006.01)
CPC C09J 7/00 (2013.01) [B29C 33/3857 (2013.01); B81C 1/00031 (2013.01); B82Y 10/00 (2013.01); B82Y 40/00 (2013.01); G03F 7/0002 (2013.01); B29L 2031/757 (2013.01); C09J 2301/31 (2020.08); C09J 2301/416 (2020.08); Y10T 428/24479 (2015.01)] 22 Claims
OG exemplary drawing
 
1. A dry adhesive comprising:
a plurality of fibers attached to a backing layer, wherein each fiber of the plurality of fibers comprises:
a stem having a proximal end near the backing layer and a distal end;
a base disposed at the proximal end,
wherein the base has a diameter greater than a diameter of the stem, and
wherein there is a discontinuity in a profile of the fiber defined by a change in a direction of the profile relative to a longitudinal axis of the fiber at an intersection between the stem and the base; and
a tip disposed at the distal end,
wherein the tip has a maximum diameter greater than the diameter of the stem at an intersection between the stem and the tip, and
wherein the intersection comprises an area along the longitudinal axis of the fiber where there is discontinuity in the profile of the fiber defined by an abrupt change in a direction of the profile relative to the longitudinal axis.