US 12,259,028 B2
Rotary mechanical transmission
Luciano Pizzoni, Foligno (IT); and Nicola Borgarelli, Perugia (IT)
Assigned to UMBRAGROUP S.P.A., Foligno (IT)
Filed by UMBRAGROUP S.p.A., Foligno (IT)
Filed on Sep. 12, 2023, as Appl. No. 18/465,579.
Claims priority of application No. 102022000020739 (IT), filed on Oct. 7, 2022.
Prior Publication US 2024/0117864 A1, Apr. 11, 2024
Int. Cl. F16H 25/22 (2006.01); B64C 13/38 (2006.01); F16H 25/20 (2006.01)
CPC F16H 25/2214 (2013.01) [B64C 13/38 (2013.01); F16H 2025/2031 (2013.01); F16H 2025/2078 (2013.01); F16H 25/2247 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A rotary mechanical transmission, comprising:
a containment structure;
a first rotary element, connected or connectable to a drive unit to define a mechanical power input unit and rotatable about an axis;
a fixed guide forming part of said containment structure,
a second rotary element rotatable about said axis of rotation and defining a power output unit;
a roto-translational intermediate element, extending along said axis of rotation and comprising a first threaded portion, coupled to said first rotary element, and a second threaded portion, coupled to said fixed guide, said intermediate element being also coupled with said second rotary element by a linear guide parallel to said axis of rotation;
wherein the first threaded portion and the second threaded portion have different pitches and are at least partly separated along said axis of rotation; and
wherein said intermediate element is defined by a hollow body and said second rotary element is inserted inside the intermediate element.