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 Title: |
US4280491:
Powered air respirator
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Berg, Richard C.; Bloomington, MN
Kvall, Emil J.; North St. Paul, MN
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| Assignee: |
Minnesota Mining and Manufacturing Company, St. Paul, MN
other patents from MINNESOTA MINING AND MANUFACTURING COMPANY (377880) (approx. 9,335)
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| Published / Filed: |
1981-07-28
/ 1980-03-07
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| Application Number: |
US1980000127953
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| IPC Code: |
Advanced:
A42B 3/22;
A42B 3/28;
A61F 9/06;
A62B 18/04;
IPC-7:
A61F 9/06;
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| ECLA Code: |
A42B3/28E; A42B3/22C; A61F9/06L; A62B18/04A;
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| U.S. Class: |
Current:
128/201.24;
002/171.3;
055/379;
055/385.1;
055/467;
055/473;
055/482;
055/DIG.035;
128/201.25;
Original:
128/201.24;
128/201.25;
002/171.3;
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| Field of Search: |
128/201.24,201.25,201.29,201.23
002/171.3
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| Priority Number: |
| 1980-03-07 |
US1980000127953 |
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| Abstract: |
A powered air respirator which provides hardhat (safety helmet), respiratory, eye and face protection and comprises a hardhat, a shell member spaced from and overlying the hardhat, air filtering means in the space between the shell member and the hardhat, a face shield assembly attached to and depending from the front of the shell member, a transparent face shield in said face shield assembly, face sealing means on the peripheral edge of said face shield assembly to seal against a user's face from temple to temple and an air circulating means located in the rear portion of the shell member is disclosed.
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| Attorney, Agent or Firm: |
Alexander, Cruzan ;
Sell, Donald M. ;
Okubo, Edward T. ;
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| Primary / Asst. Examiners: |
Recla, Henry J.;
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Family: |
Show 10 known family members
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First Claim:
Show all 6 claims |
What is claimed is:
1. A powered air respirator providing hardhat, respiratory, eye and face protection comprising a hardhat, a shell member secured to said hardhat and spaced therefrom to form a generally dome shaped passageway therebetween, a face shield assembly attached to and depending from the front of said shell member having a peripheral edge which extends down the sides of the user's face from a point just slightly below the temples and across the bottom of the chin, a transparent face shield in said face shield assembly, face sealing means on the peripheral edge of said face shield assembly and terminating adjacent each temple of the user, to seal against a user's face from temple to temple, the terminal ends of said face sealing means being spaced from said shell member to define air exists from each side of said face shield assembly adjacent the temples of the user, and means for providing filtered air through said dome shaped passageway in a stream over the user's face and through said air exits above the user's temples.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 58 U.S. patent(s) that reference this one
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