US 12,442,154 B2
Rotator for a tool
Joakim Harr, Vindeln (SE)
Assigned to Indexator Rotator Systems AB, Vindeln (SE)
Appl. No. 17/914,906
Filed by Indexator Rotator Systems AB, Vindeln (SE)
PCT Filed Mar. 29, 2021, PCT No. PCT/SE2021/050278
§ 371(c)(1), (2) Date Sep. 27, 2022,
PCT Pub. No. WO2021/206608, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2050403-1 (SE), filed on Apr. 8, 2020.
Prior Publication US 2023/0138156 A1, May 4, 2023
Int. Cl. E02F 3/36 (2006.01); B66C 3/00 (2006.01); B66C 13/16 (2006.01)
CPC E02F 3/3681 (2013.01) [B66C 3/005 (2013.01); B66C 13/16 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A rotator for a tool, the rotator comprising:
a stator;
a rotor rotatably arranged inside the stator, the rotor comprising a radial bearing having a first axial extension in the rotator;
a separate bearing arranged radially outside the rotor, the separate bearing being configured to carry an external load of the rotator;
one or more hydraulic chambers arranged between the rotor and the stator, each hydraulic chamber having a second axial extension in the rotator, wherein the second axial extension is less than the first axial extension; and
a hydraulic swivel and an electrical swivel and/or an angle meter arranged inside the rotor, wherein the hydraulic swivel and the electrical swivel and/or the angle meter at least partially extends axially in the second axial extension in the rotator, and wherein the hydraulic swivel is axially aligned with the electrical swivel and/or the angle meter inside the rotor along the axis of rotation of the rotator.