Vacuum limiting medical pump
US5676525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1996 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Aug 6, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/0693
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pump having electronic and mechanical components which allow an individually adjustable operation. Certain components periodically transform a driving current for an electrical drive. An adjustable clock generator adjusts transformation frequency. Pumping volume is determined and limited as desired by means of a position detection device. The pump also includes components for measuring the driving current that interact with an adjustable current-limiting device, thus allowing the pumping pressure of the pump to be adjusted and limited. The pump may include several pump cylinders which are controlled by a position control circuit in such a way that the generated partial vacuum follows a predetermined time characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.