US 11,918,835 B2
Powered air-purifying respirator (PAPR) with eccentric venturi air flow rate determination
Julius Jancarik, Brno (CZ); Garaga Phani Kumar, Hyderabad (IN); Anjaiah Tumu, Hyderabad (IN); and Jonathan Sugerman, Cranston, RI (US)
Assigned to HONEYWELL INTERNATIONAL INC., Charlotte, NC (US)
Filed by Honeywell International Inc., Charlotte, NC (US)
Filed on Dec. 29, 2020, as Appl. No. 17/136,331.
Application 17/136,331 is a continuation of application No. 15/654,371, filed on Jul. 19, 2017, granted, now 10,960,237.
Prior Publication US 2021/0113861 A1, Apr. 22, 2021
Int. Cl. A62B 18/00 (2006.01); F04D 27/00 (2006.01)
CPC A62B 18/006 (2013.01) [F04D 27/001 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A respiratory device comprising:
an eccentric venturi including:
a first sensor port and a second sensor port;
a conductor comprising a conductor portion and a first transition portion,
wherein the conductor portion has a first axis,
wherein the first transition portion is downstream from the conductor portion,
wherein a whole circumference of the first transition portion is angularly offset relative to a whole circumference of the conductor portion;
a diffuser comprising a diffuser portion and a second transition portion;
wherein the diffuser portion downstream from the second transition portion having a second axis,
wherein a whole circumference of the second transition portion is angularly offset relative to a whole circumference of the diffuser portion; and
a throat comprising a throat portion downstream from the first transition portion having a third axis, wherein the first transition portion has a first tapered portion transitioning from the conductor portion to the throat portion such that a width of the conductor portion is greater than a width of the throat portion,
wherein the second transition portion is downstream from the throat portion,
wherein the second transition portion has a second tapered portion transitioning from the throat portion to the diffuser portion such that the width of the throat portion is less than a width of the diffuser portion,
wherein the third axis of the throat portion is angularly offset to the first axis of the conductor portion and the second axis of the diffuser portion;
wherein the first axis of the conductor portion makes an angle α with the second axis of the diffuser portion, and
wherein the angle α is at least greater than or equal to 8 degrees and less than 35 degrees.