Rotational coupling device with improved drive key retention structure
US8844701B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2008 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Dec 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7021
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotational coupling device for use as a clutch and/or brake is provided with improved retention of a drive key during shipping, assembly, and operation of the device. The device includes a rotor disposed about an input shaft. The input shaft is disposed about a rotational axis and the rotor and input shaft define opposed keyways. A key is disposed in the keyways and rotatably couples the rotor and input shaft. An armature is disposed about the axis and coupled to an output member and configured for selective engagement with the rotor. In one embodiment, the key and a support member in the device are shaped in a complementary fashion to limit radial and axial movement of the key. In another embodiment, an axial end of the key or rotor is deformed to axially align the axial ends of the key and rotor and limit axial movement of the key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.