Measuring instrument
US4270273A · kind A · utility
2Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Oct 30, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A measuring instrument, preferably for determining the mean arterial blood pressure from a graph containing values of systolic pressure and diastolic pressure. The instrument comprises a compass having a pair of outer legs and a single intermediate leg disposed therebetween. The outer legs are arranged to enable the distance between outer ends thereof to be manually varied. A proportioning mechanism maintains an outer end of the intermediate leg at a constant ratio, preferably one-third, of the distance between the outer legs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.