Limited force cartridge for temporary fasteners
US5240361A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | May 3, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B19/109
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A force limiting cartridge comprises a housing and end cap which screw together to contain a slidable piston biased by a coil spring. The cartridge surrounds a conventional pull-up clamp. The bottom end of the cartridge pushes against the top layer of the laminate. The piston is pushed against the spring when the clamp screw is tightened. The piston is provided with a cross mark which when aligned with cross hairs on the housing indicate a desired clamping pressure has been attained. The cartridge can be calibrated to any desired pressure (depending on the spring's performance characteristics) by adjusting the total length of the housing/end cap assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.