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Fan-supported gas mask and breathing equipment with adjustable fan output

  • US 5,413,097 A
  • Filed: 01/22/1993
  • Issued: 05/09/1995
  • Est. Priority Date: 01/25/1992
  • Status: Expired due to Fees
First Claim
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1. Breathing equipment, comprising:

  • a protective mask including a filtered air connection;

    an electrically driven fan with adjustable driving power, said fan being positioned in a fan housing, said fan being connected to said protective mask via said filtered air connection;

    a filter connection associated with said fan housing for attaching a filter insert with different filter properties, said fan housing including a connection identification means, positioned adjacent said filter connection for receiving filter property information;

    a filter insert including filter identification means for providing filter property information, said filter identification means being forced into engagement with said connection identification means upon attaching said filter insert to said filter connection;

    at least one electric contact being actuated by said connection identification means upon engagement with said filter identification means to adjust delivery output of said electrically driven fan to the filter property assigned to the attached filter insert;

    sensor identification means including an information source element on said filter insert and an information receiving element on said fan housing adjacent said filter connection, said sensor identification means receiving information as to harmful material to be sensed for activating a detection sensor, which is sensitive to the harmful material retained by the filter for the filter insert introduced.

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