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US 2019/0022778 A1Published application
Advanced herringbone gear design
AssigneeSikorsky Aircraft Corporation
InventorsEdward H. BITTNER, Bruce D. HANSEN, Christopher John MUSSEL
Life of this patent
Estimating the term…
Abstract
A herringbone gear includes a cylindrical body having a circumferential face having a width. A first helical gear tooth on the circumferential face has a first configuration, a second helical gear tooth on the circumferential face has a second configuration, and a transition on the circumferential face extends between the first helical gear tooth and the second helical gear tooth. An involute form taken within a transverse plane of the circumferential face remains constant over the width.
Claims13
A herringbone gear, comprising:
- a cylindrical body having a circumferential face having a width;
- a first helical gear tooth on the circumferential face having a first configuration;
- a second helical gear tooth on the circumferential face having a second configuration other than the first configuration;
- and
- a transition on the circumferential face extending between the first helical gear tooth and the second helical gear tooth such that an involute form taken within a transverse plane of the circumferential face which remains constant over the width.
2 more elements
A method of forming a double-helical gear, comprising:
- forming a portion of an aligned first gear tooth, transition gear tooth and second gear tooth via a single pass of a spindle such that an involute form taken within a transverse plane remains constant over a width of the gear.
Dependencies are inferred from the claim text.