US 11,056,959 B2
Linear actuator
Alex Caccia, Oxford (GB); and Adrian Thomas, Oxford (GB)
Assigned to Animal Dynamics Limited, Oxford (GB)
Appl. No. 16/87,441
Filed by Animal Dynamics Limited, Oxford (GB)
PCT Filed Mar. 22, 2017, PCT No. PCT/GB2017/050801
§ 371(c)(1), (2) Date Sep. 21, 2018,
PCT Pub. No. WO2017/163061, PCT Pub. Date Sep. 28, 2017.
Claims priority of application No. 1604793 (GB), filed on Mar. 22, 2016.
Prior Publication US 2019/0131859 A1, May 2, 2019
Int. Cl. H02K 33/02 (2006.01); H02K 5/20 (2006.01); H01F 7/16 (2006.01); H04R 9/04 (2006.01); H02K 41/035 (2006.01); H02K 33/18 (2006.01); H02K 41/03 (2006.01); H01F 7/06 (2006.01); H04R 9/02 (2006.01); H04R 9/06 (2006.01)
CPC H02K 33/02 (2013.01) [H01F 7/066 (2013.01); H01F 7/1615 (2013.01); H02K 5/20 (2013.01); H02K 33/18 (2013.01); H02K 41/031 (2013.01); H02K 41/0356 (2013.01); H04R 9/041 (2013.01); H01F 2007/163 (2013.01); H01F 2007/1692 (2013.01); H02K 2205/09 (2013.01); H04R 9/022 (2013.01); H04R 9/043 (2013.01); H04R 9/063 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A linear actuator comprising
a stationary support structure;
at least one magnet provided on the support structure, wherein the support structure comprises two rods that are respectively secured to opposing faces of the magnet and extend in opposing directions away from the magnet;
a carriage;
at least one coil arrangement provided around the carriage; and
a spring arrangement operatively connected between the support structure and the carriage to urge the carriage towards a predetermined position relative to the support structure;
wherein a part of the support structure is received by a part of the carriage so as to constrain motion of the carriage relative to the support structure substantially along a longitudinal axis of the linear actuator; and
wherein the support structure further comprises a tube around the carriage, wherein the motion of the carriage comprises the output of the linear actuator.