Double bending beam load cell
US6504114B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2000 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Aug 22, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/2243
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A precision double bending beam load cell made at low cost by using load cell quality material in the bending beams only, while less costly material is used for end blocks to maintain the beams in a predetermined parallel relationship and to mount the load cell, provided that the joints between the beams and the end blocks are slip free. Slip free joints can be obtained by making the end blocks in the form of rods with necks press fitted into matching holes at the ends of the beams, or by laser welding or hard soldering metal end blocks to metal bending beams. Plastic end blocks can also be injected molded onto the ends of bending beams with holes and scalloped edges for the injection molded plastic to grip onto. Shrinkage or expansion of the plastic material during the curing process will then make the joints prestressed and slip free.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.