Wrap spring activated torque transfer device
US6742640B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jan 11, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D13/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A wrap spring activated torque coupling is applied to a torque transmission coupling and/or a locking differential for a motor vehicle. The wrap-spring torque coupling allows for quick engagement and disengagement of an input member to an associated output member at large torsional capacities that exceed the limit of what is taught by prior art. The ability to quickly lock and unlock a vehicle differential under either a torsionally loaded or unloaded condition is realized by this application of the wrap spring activated torque coupling. Moreover, a two piece bi-directional wrap spring hub design is utilized that allows for simple turning and broaching operations for use in its manufacture, thereby eliminating a conventional deep annular counterbore that would require the use of much more expensive machining processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.