US 12,110,957 B2
Globoid worm gear
Didier Richard, Marignier (FR); and Lionel Martin, Sallanches (FR)
Assigned to ILLINOIS TOOL WORKS INC., Glenview, IL (US)
Appl. No. 17/913,746
Filed by ILLINOIS TOOL WORKS INC., Glenview, IL (US)
PCT Filed Mar. 16, 2021, PCT No. PCT/US2021/022471
§ 371(c)(1), (2) Date Sep. 22, 2022,
PCT Pub. No. WO2021/194794, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 20165830 (EP), filed on Mar. 26, 2020; and application No. 21160313 (EP), filed on Mar. 2, 2021.
Prior Publication US 2023/0102311 A1, Mar. 30, 2023
Int. Cl. F16H 55/22 (2006.01); F16H 1/16 (2006.01)
CPC F16H 55/22 (2013.01) [F16H 1/16 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A globoid worm gear for engagement with a worm in a worm gear assembly, the globoid worm gear comprising:
first and second end surfaces, a circumferential surface, and an axis of rotation; and
a plurality of gear teeth spaced about the circumferential surface with spaces arranged between adjacent gear teeth, the plurality of gear teeth being configured to engage the worm;
wherein the plurality of gear teeth are configured such that the spaces between adjacent gear teeth open into the first end surface;
wherein each of the plurality of gear teeth comprises a radially outer top surface having an end region adjacent the first end surface, wherein the end region comprises a chamfer that slopes radially inward toward the axis of rotation when moving along the chamfer in a direction toward the first end surface.