Powered air-purifying respirator (PAPR) with eccentric venturi air flow rate determination
US10918893B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2017 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Jun 12, 2038 |
Classification
- Technology area (CPC —)General
Abstract
A powered air-purifying respirator (PAPR). The PAPR comprises an air pump comprising an electric motor, an eccentric venturi communicatively coupled to an air channel of the air pump, wherein the eccentric venturi comprises a first sensor port and a second sensor port, a differential air pressure sensor mechanically coupled to the first sensor port and the second sensor port, and a controller that is communicatively coupled to an electrical output of the differential air pressure sensor and to the electric motor, wherein the controller is configured to control the speed of the electric motor to maintain a predefined rate of flow of purified air based on the electrical output of the differential air pressure sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.