US 11,898,581 B2
Pneumatic stepper motor and device comprising at least one such pneumatic stepper motor
Vincent Groenhuis, Enschede (NL); Francoise Jeanette Siepel, Tubbergen (NL); and Stefano Stramigioli, Borne (NL)
Assigned to Machnet Medical Robotics B.V., Heerenveen (NL)
Appl. No. 16/326,442
Filed by Machnet SG PTE. LTD., Singapore (SG)
PCT Filed Aug. 23, 2017, PCT No. PCT/NL2017/050552
§ 371(c)(1), (2) Date Feb. 19, 2019,
PCT Pub. No. WO2018/038608, PCT Pub. Date Mar. 1, 2018.
Claims priority of provisional application 62/522,734, filed on Jun. 21, 2017.
Claims priority of provisional application 62/378,261, filed on Aug. 23, 2016.
Prior Publication US 2020/0182267 A1, Jun. 11, 2020
Int. Cl. F15B 15/06 (2006.01); F15B 11/12 (2006.01); A61B 10/00 (2006.01); A61B 10/02 (2006.01)
CPC F15B 15/065 (2013.01) [A61B 10/0041 (2013.01); F15B 11/12 (2013.01); F15B 11/127 (2013.01); A61B 2010/0208 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A pneumatic stepper motor, comprising:
a housing, said housing accommodating at least part of:
a rack comprising a plurality of gear elements, said rack having a longitudinal direction; and
two pistons arranged next to each other in the longitudinal direction of the rack, each of said two pistons comprising at least two teeth, the at least two teeth of each of said two pistons being arranged to cooperate with said rack;
wherein said rack comprises said gear elements at least two longitudinal sides thereof; and
wherein at least one of said housing, said rack, and said two pistons are manufactured from a plastic material by 3D printing.