Digital readout indicator of oxygen usage, pressure and flow
US4571995A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Sep 13, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Sep 13, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digital readout and display adapted for use with a tank of oxygen under pressure provides pressure regulation, discerning of the pressure in the tank and consumption of the oxygen. A small battery within a case member powers this display. The readout device includes a gauge with a movable element responsive to pressure. An S-shaped rod is carried by and fixed to this shaft. This rod is very light in weight and in a secured condition is free at both ends to prevent friction of moving parts. The discharge end of this light-conducting rod comes in way of a light receiver carried by the body of the gauge. There is a multiplicity of receivers arrayed in a circular pattern near the edge of the gauge body and the light from this rod actuates a reed switch which sends an electrical signal to a microprocessor thence to an LED digital display. A single emitter may be used to send light through three rods each of which is carried by a gauge-type device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.