Air differential core winding apparatus
US6513751B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Mar 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H75/2437
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A plurality of core mounting outer ring members are each rotationally slidably mounted on a corresponding inner ring member having cam surfaces in the outer surface. A rotating drive shaft has radial pistons and rotates the inner ring member by frictional engagement of the pistons displaced by an inflatable bladder. A plurality of strips in one embodiment are between the bladder and the pistons for providing increased torque on the inner ring member. The outer ring member has a first annular array of bores with core gripping balls resiliently urged radially outwardly to grip a core receiving a winding strip thereabout. A second array of bores in the outer member receive larger core gripping balls which freely displace in the bores. Ramp camming grooves are in the outer surface of the inner ring member, the larger gripping balls are engaged with the grooves and are forced into gripping engagement with the received core when the inner ring member is rotated. The spring loaded balls provide initial friction load between the core and outer ring members so that the ramp balls can operate to grip the core upon rotation of the inner ring member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.