Respirator

Patent metadata

Field	Value
Publication number	US-12390672-B2
Application number	US-202217650016-A
Country	US
Kind code	B2
Filing date	Feb 4, 2022
Priority date	Feb 5, 2021
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

The present invention provides a respirator. The respirator ( 100 ) has an outer housing ( 103 ), a filter, and an end cover ( 104 ). The filter is arranged on the outer housing ( 103 ). Position-limiting devices matching each other are respectively provided on the end cover ( 104 ) and the outer housing ( 103 ), and are used for fixing the filter at the outer housing ( 103 ).

First claim

What is claimed is:

1. A respirator, wherein the respirator comprises an outer housing, a filter, an end cover, the filter being arranged on the outer housing, and a plurality of position-limiting devices matching each other, wherein a position-limiting device of the plurality of position-limiting devices is provided on the end cover, wherein the other position-limiting device of the plurality of position-limiting devices is provided on the outer housing, wherein the plurality of position-limiting devices is used for fixing the filter at the outer housing, and
wherein the position-limiting device on the outer housing comprises a rod, the rod being fixed at the filter, a plurality of ribs being formed in a longitudinal direction of the rod and provided on an outer peripheral edge of the rod, the position-limiting device on the end cover comprising recesses, and one end of the plurality of ribs engaging with the recesses.

2. The respirator according to claim 1 , wherein the plurality of ribs is evenly distributed on the outer peripheral edge of the rod.

3. The respirator according to claim 1 , wherein an opening is provided in a middle portion of the end cover, and the recesses are provided on an outer periphery of the opening.

4. The respirator according to claim 1 , wherein a through hole is provided in a middle of the filter, and the rod passes through the through hole.

5. The respirator according to claim 1 , wherein the respirator further has a threaded fastener having an unthreaded segment and a threaded segment, an aperture being provided in the middle of the rod, and an opening being provided with an inner thread, wherein the threaded fastener is inserted into the aperture by means of the unthreaded segment thereof, and engages with the inner thread by means of the threaded segment thereof.

6. The respirator according to claim 1 , wherein the rod is configured to retain a filter medium of the filter.

7. The respirator according to claim 1 , wherein the end cover is configured to be in a shape of a curved disc.

8. The respirator according to claim 1 , wherein the filter is configured to be an inhalation filter.

9. The respirator according to claim 8 , wherein the outer housing has a recessed portion that is recessed relative to an outside surface thereof, and the inhalation filter is accommodated in the recessed portion.

Assignees

• Honeywell Safety Products Usa Inc

Inventors

• Han Xiaojin
• Xiang Hongbing
• Duan Licong
• Shi Wei
• Tian Hang

Classifications

• A62B18/025

  Halfmasks (A62B23/02 takes precedence; surgical face masks A41D13/11) · CPC title

• B01D46/0002

  Casings; Housings; Frame constructions · CPC title

• A62B18/08

  Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices (eye-pieces for protective goggles A61F9/02; composition of materials for the windows or other transparent parts A62D7/00) · CPC title

• B01D46/106

  Ring-shaped filtering elements · CPC title

• B01D46/4227

  Manipulating filters or filter elements, e.g. handles or extracting tools · CPC title