Method of making a modified elliptical gear
US5545871A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1994 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jan 11, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2035/003
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A modified elliptical gear defined by a modified elliptical shape having perpendicularly disposed major and minor axes, and bulged portions projecting outwardly beyond the contour of a true ellipse in peripheral regions between the major and minor axes. A computer is preferably used to rotate a simulated hobbing rack having a row of hobbing teeth around the modified elliptical shape. The outline of the hobbing rack is traced at selected positions during the rack rotation to produce a profile of a modified elliptical gear with projecting gear teeth. A topping shape is superimposed upon the gear profile to selectively top the gear teeth. The modified elliptical gear profile is transmitted to a machining device operable to produce a modified elliptical gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.