07320722 is referenced by 11 patents and cites 88 patents.

A personal respiratory protection device 10 that comprises a mask body 12 that has a structure 35 located on it for receiving a clean air supply source such as a filter cartridge 14. The clean air receiving structure 35 has a first threaded portion 34. The clean air supply source has a second threaded portion 58 that has a thread 60 that mates with a thread 36 of the first threaded portion 34. The first and second threaded portions 34 and 58 engage each other at a high thread pitch and include an integral d├ętente. A stop prevents over-rotation of the clean air supply source 14 relative to the mask body 12 during the securement operation. The inventive device allows the clean air supply source 14 to be attached to the mask body 12 with minimal rotation and is sufficiently intuitive that users may only need one hand to attach and replace the clean air source component 14 without having to remove the respirator 10 from their face.

Title
Respiratory protection device that has rapid threaded clean air source attachment
Application Number
10/977076
Publication Number
7320722 (B2)
Application Date
October 29, 2004
Publication Date
January 22, 2008
Inventor
John M Pilgrim
Woodbury
MN, US
William A Mittelstadt
Woodbury
MN, US
Agent
Anna A Wetzels
Assignee
3M Innovative Properties Company
MN, US
IPC
A62B 9/04
B01D 46/00
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