Spring type dogging device
US4069999A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Nov 10, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B5/163
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A clamping device for securing a workpiece such as an electronic package to a support such as a heat sink. A curved slot is machined around a central opening in the body of a configurated flat metal clamp having an extending lip which contacts the edge of the workpiece. The central opening in the clamp body receives a hold down screw member which threadably engages the support. When the hold down screw is fully tightened against the support with the extending lip over the workpiece, the known clamping force predetermined by the thickness and configuration of the clamp body is applied. The need for a torque wrench and specific fastener torque values to prevent possible distortion of the surface of the heat sink is eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.