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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 10692637 B1

PDFFull Text
Date of Patent:
Jun. 23, 2020

Filed:

Mar. 26, 2018

Electromagnetic actuator

Applicant:

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

Inventors:

Juan José Zarate, Neuchâtel, CH;

Herbert Shea, Cormondrèche, CH;

Assignee:

ECOLE PLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL), Lausanne, CH;

Attorney:

Maschoff Brennan

Primary Examiner:

Shawki S Ismail

Assistant Examiner:

Lisa N Homza

Int. Cl.
CPC ...
H01F 7/08 (2006.01); H01F 7/18 (2006.01); H01F 7/06 (2006.01); G06F 3/01 (2006.01); H01F 27/36 (2006.01); H01F 27/28 (2006.01); G09B 21/00 (2006.01); H01F 7/16 (2006.01);
U.S. Cl.
CPC ...
H01F 7/18 (2013.01); G06F 3/016 (2013.01); G09B 21/004 (2013.01); H01F 7/064 (2013.01); H01F 27/28 (2013.01); H01F 27/36 (2013.01); H01F 2007/1669 (2013.01);
Abstract

The present invention concerns an electromagnetic actuator for a haptic display. The actuator comprises: a) a first, movable permanent magnetic element, the first magnetic element comprising a first latching layer facing side, a second latching layer facing side substantially opposite to the first latching layer facing side, and at least one lateral face between the first latching layer facing side and the second latching layer facing side; b) a shielding element for shielding laterally the first magnetic element to confine a magnetic field generated by the first magnetic element; c) a first actuation inductor facing the first latching layer facing side for actuating the first magnetic element and arranged to displace the first magnetic element from a first latching position to a second latching position, or vice versa; d) a first latching layer facing the first latching layer facing side and arranged to attract the first magnetic element for obtaining the first latching position; and e) a second latching layer facing the second latching layer facing side and arranged to attract the first magnetic element for obtaining the second latching position, different from the first latching position.

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