Load suspension and weighing system for a dialysis machine reservoir
US9157786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2012 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Oct 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/046
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A load suspension and weighing system for a removable reservoir unit of a portable dialysis machine includes a centrally located flexure assembly. The flexure assembly includes magnets and a number of flexure rings which allow for movement of the magnets about a fixed circuit board. Sensors in the circuit board sense changes in the magnetic field as the magnets move in relation to the circuit board. The magnetic field changes produce a voltage output which is used by a processor to generate weight calculations. The top of the flexure assembly is attached to the interior of the dialysis machine. The entirety of the reservoir unit is suspended by a first internal frame that is attached to the bottom of the flexure assembly. Having a single flexure assembly positioned above the reservoir unit provides more accurate weight measurements while also preventing damage to the assembly from water spillage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.