Weighing scale with improved lever and fulcrum assembly
US5133421A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1991 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Aug 9, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G21/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A weighing scale includes a hollow casing having a lower base and an upper covering for support an object. A pressure gauge mounted to the base includes an indicator, and a hydraulic pressure sensor connected to the indicator and actuating it in response to a sensed pressure produced by the weight of the object. Four spaced fulcrum posts are mounted to the base. A lever mechanism includes a rear one-piece rod and a pair of spaced front rods respectively and pivotably mounted to the four fulcrum posts. The rear one-piece rod includes a force exerting plate resting on the hydraulic pressure sensor. A transmitting frame provided between the covering and the lever mechanism includes a pair of spaced rods and a connecting rod mounted between the spaced rods which are pivotably mounted to the lever mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.