Noise-attenuating pneumatic compressor and medical apparatus incorporating same
US5380267A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Jun 18, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pneumatic compression supplies both positive and negative pressure for operating a medical device. The pulsing sounds generated by the compressor are attenuated by connecting the inlet of the positive pressure side of the compressor and the outlet of the negative pressure side of the compressor to a common resonating chamber. A port in the resonating chamber acts as an outlet for the discharge of excess air in the chamber and an inlet for the entry of make-up air. By adjusting the diameter of the port with respect to the volume of the resonating chamber, sound attenuation can be optimized. In a compact design, the compressor housing serves as the resonating chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.