Fastener and heat sink assembly having the same
US7808791B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 24, 2009 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Apr 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fastener includes a connecting pole, a sleeve, an elastic element enclosing the sleeve and a baffling portion. The connecting pole includes a shaft, a head and a thread portion. The sleeve includes an engaging portion and a receiving portion extending from the engaging portion. The engaging portion encloses a top end of the shaft therein and abuts against the head. The receiving portion encloses a bottom end of the shaft and a top end of the thread portion. The receiving portion includes a plurality of spaced resilient pieces. The baffling portion screws onto the thread portion of the connecting pole. When the connecting pole rotates relative to the sleeve, the baffling portion moves upwardly along the thread portion to push the pieces of the receiving portion outwardly to make the pieces abut against a bottom surface of a printed circuit board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.