US 11,951,065 B2
Apparatus for generating a reciprocating rotary motion
Gertrude van der Kamp, Den Helder (NL); Pieter Johannes Bax, Drachten (NL); Theodoor Stolk, Langezwaag (NL); and Hamid Ziaimehr, Plymouth, MA (US)
Assigned to Koninklijke Philips N.V., Eindhoven (NL)
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Filed on Oct. 13, 2020, as Appl. No. 17/068,956.
Claims priority of provisional application 62/915,313, filed on Oct. 15, 2019.
Prior Publication US 2021/0106495 A1, Apr. 15, 2021
Int. Cl. A61H 23/02 (2006.01); A61H 11/00 (2006.01); A61H 23/00 (2006.01); A61H 31/00 (2006.01); H02K 7/065 (2006.01)
CPC A61H 23/0254 (2013.01) [A61H 11/00 (2013.01); A61H 23/006 (2013.01); A61H 23/0218 (2013.01); A61H 31/006 (2013.01); H02K 7/065 (2013.01); A61H 2011/005 (2013.01); A61H 2201/1215 (2013.01); A61H 2201/1619 (2013.01); A61H 2201/165 (2013.01); A61H 2205/082 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus for generating a rotary reciprocating motion, comprising:
an input shaft having a rotation axis;
a drive motor for providing unidirectional rotation of the input shaft about the rotation axis;
an output shaft for delivering reciprocating rotary motion about the rotation axis, wherein the output shaft is for coupling to a load which limits the rotation of the output shaft thereby to prevent unidirectional rotation of the output shaft;
the load being configured to impart a force application comprising pulsating vibrations to a subject;
a first magnetic or ferromagnetic ring disposed about the rotation axis, rotationally fixed to the input shaft;
a second magnetic or ferromagnetic ring disposed about the rotation axis, rotationally fixed to the output shaft,
wherein the first and second rings are disposed one within the other around the rotation axis and wherein at least one of the first and second rings comprises an annular sequence of permanent magnetic elements; and
a third magnetic or ferromagnetic ring, wherein the second and third rings are both disposed within or around the first ring,
wherein the first and second rings define a coupling which is in anti-phase with a coupling defined by the first and third rings.