Clamping means, and modules and units including clamping means
US4644444A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Aug 15, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B29/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Heat dissipation from electronic modules is improved by clamping their edges against heat-conducting fins in a housing by means of two expanding jackscrews. Each jackscrew has a shaft mounted in bearings in the module and carries a row of alternate closed rings and split rings. The closed rings are smaller in diameter than the split rings and have a circular section. The split rings are of tubular shape, having ends of circular section which engage the closed rings. The forward end of the shaft is screw-threaded to engage a fixed nut in the housing. When the shaft is screwed into the fixed nut, it pulls a connector on the module into engagement with a cooperating connector in the housing. At the same time, the closed rings are forced against the split rings, causing them to expand radially and exert a clamping force against the edges of the modules, forcing them into thermal contact with the fins in the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.