Capacitance device for medical implant
US4550720A · kind A · utility
79Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1983 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Nov 15, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/26
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A capacitance device for a medical implant having a hydraulic system including a pressure chamber in which hydraulic pressure must be maintained at a working level comprises an impermeable, elastic bladder which is positioned in the pressure chamber. The bladder is filled with gas so that when fluid is lost from the pressure chamber through leaks within the hydraulic system the bladder will expand to compensate for the fluid loss and prevent severe pressure drops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.