Vital signs monitor pumping system
US4958636A · kind A · utility
11Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1988 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D16/2066
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pump supplies a variable pressure to an occluding cuff of a blood pressure monitor. This pump includes a pumping member that is driven through a stroke in response to a drive signal having a fixed frequency but a variable duty cycle such that the length of the stroke is variable in response to variations in the duty cycle. The drive signal is generated at a selected driving frequency which is outside of and greater than the measuring frequency range of the blood pressure monitor. In this way, strokes of the pump do not cause pressure variations in the cuff within the measuring frequency range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.