Apparatus for driving a medical appliance
US4942735A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M60/43
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus for driving a medical appliance has a single compressor for generating both the positive and negative pressures. The switching valves are connected to the outlet and inlet terminals of the compressor. The outlet and inlet terminals of the compressor are also connected to the positive pressure accumulator and the negative pressure accumulator, respectively. The apparatus has the pressure sensors to sense the pressures in the positive and negative pressure accumulators. When the pressure in the accumulator reaches a set pressure, at least one of the switching valves is closed. The apparatus further has the relief valves connected to the outlet and inlet terminals of the compressor. These relief valves open when the pressures of the compressor become excessive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.