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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.:

US 11856861 B1

PDFFull Text
Date of Patent:
Dec. 26, 2023

Filed:

Nov. 23, 2018

Spring with a plurality of elements, and actuator including such as a spring

Applicant:

Ecole Polytechnique Federale DE Lausanne (Epfl), Lausanne, CH;

Inventors:

Jonathan Chavanne, Lausanne, CH;

Yoan Civet, Publier, FR;

Yves Perriard, Neuchâtel, CH;

Assignee:

Ecole Polytechnique Federale De Lausanne, Lausanne, CH;

Attorney:

Blank Rome LLP

Primary Examiner:

Eduardo A Rodela

Int. Cl.
CPC ...
H10N 30/88 (2023.01); A61M 60/289 (2021.01); A61M 60/161 (2021.01); A61M 60/486 (2021.01); A61M 60/839 (2021.01); A61M 39/22 (2006.01); A61M 60/117 (2021.01); H10N 30/50 (2023.01); H10N 30/857 (2023.01);
U.S. Cl.
CPC ...
H10N 30/886 (2023.02); A61M 39/22 (2013.01); A61M 60/117 (2021.01); A61M 60/161 (2021.01); A61M 60/289 (2021.01); A61M 60/486 (2021.01); A61M 60/839 (2021.01); H10N 30/50 (2023.02); F16F 2228/063 (2013.01); H10N 30/857 (2023.02);
Abstract

A spring () comprising a plurality of elements (), each element () comprising a rigid portion () and a flexible beam (), the extremities () of the flexible beam being supported by the rigid portion (), the flexible beam () having a single stable position, so that the flexible beam can be deformed when a pressure is exerted between said extremities in the direction of the rigid portion (), and returns to said single stable position when the pressure is released, and wherein the rigid portion () of at least one element () is in contact with the flexible beam () of the next element between said extremities () of the flexible beam (), so that the spring has a negative stiffness over an operating range. The arrangement ensures a pure radial compression/expansion of the spring.

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