US 12,000,286 B2
Gear wheel having an improved profile
Manuele Rossi, San Giorgio Piacentino (IT); and Andrea Ceruti, San Giorgio Piacentino (IT)
Assigned to Settima Meccanica S.r.l., San Giorgio Piacentino (IT)
Appl. No. 17/630,378
Filed by Settima Meccanica S.r.l., San Giorgio Piacentino (IT)
PCT Filed Jul. 30, 2020, PCT No. PCT/EP2020/071508
§ 371(c)(1), (2) Date Jan. 26, 2022,
PCT Pub. No. WO2021/019014, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 102019000013713 (IT), filed on Aug. 1, 2019.
Prior Publication US 2022/0282621 A1, Sep. 8, 2022
Int. Cl. F03C 2/00 (2006.01); B23F 15/08 (2006.01); F01C 1/08 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 2/08 (2006.01); F04C 2/16 (2006.01); F04C 18/00 (2006.01)
CPC F01C 1/084 (2013.01) [B23F 15/08 (2013.01); F04C 2/084 (2013.01); F04C 2/16 (2013.01); Y10T 29/49467 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A gear wheel for a hydraulic apparatus, comprising a plurality of teeth and arranged to be rotatable about an axis of rotation, said teeth having a sectional profile and being adapted to mesh with respective teeth of another gear wheel during a rotational motion about the axis of rotation, wherein at least one tooth is shaped so as to have at least one cutting edge configured to remove material from a body which is contacted by said at least one cutting edge during the rotation of said gear wheel, characterized in that said at least one cutting edge is defined by at least one groove which is lowered, with respect to a rounded starting profile, by an amount from 0.2% to 5% of the height of said tooth, said at least one groove decreasing away from the at least one cutting edge along the sectional profile, wherein the sectional profile corresponds to the rounded starting profile except for the at least one groove; wherein the at least one groove forms a projection which protrudes with respect to a rounded profile of the tooth by an amount from 0.01 mm to 1 mm; wherein the projection has a width from 0.01 mm to 1 mm.