Pulse wave detecting apparatus
US4928700A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Jan 23, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pulse wave detecting apparatus having a pressure-sensitive semiconductor element for detecting pulsation of an artery of a subject and converting the detected pulsation into electrical signal, the electrical signal representing pulse wave corresponding to the pulsation, the semiconductor element being pressed against a body surface of the subject such that the semiconductor element is aligned with the artery via the body surface, the apparatus including a timer device for measuring operation time of the pressure-sensitive semiconductor element, and generating a full-use signal when the measured operation time exceeds a reference value representing that the semiconductor element has been fully operated up to its permitted operation time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.