Diaphragm and chamber device
US4790937A · kind A · utility
10Cited by
2References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 20, 1986 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | May 20, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/1639
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A diaphragm and chamber device including chamber means for defining a chamber having fixed position walls on opposite sides, a diaphragm in the chamber and sealably mounted between the walls to define first and second regions therein on opposite sides of the diaphragm, the diaphragm being movable in the chamber so as to change the volume of the two regions as the diaphragm moves toward either the wall, a magnet carried by the diaphragm and movable therewith, and a magnet position sensor carried by a the wall and sensing the location of the magnet and thus the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.