Load cell scale
US4020911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1974 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Jun 14, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G3/1406
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Several load cell fixed beams transmit the weight of the useful load of a truck or a scale device from the useful load support to the base structure, such as a truck chassis, or a trailer chassis. The load cell fixed beam carries two compression sensitive strain gauges and two tension sensitive strain gauges connected in a Wheatstone bridge circuit to actuate a digital display. An amplifier or a variable gain amplifier can be provided to intensify the bridge circuit signal. Calibration controls can be provided for setting the readout of the useful load to zero, and further controls can alter the sensitivity of the circuitry to alter the ratio between useful weight and readout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.