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US5524616A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of air filtration for fire fighter emergency smoke inhalation protection

Assignee: LifePro Inc
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Filing: 1995-01-27
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Granted: 1996-06-11
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Expires: 2015-01-27
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Abstract

Abstract A method of emergency smoke inhalation protection of fire fighters in imminent life-threatening situations includes configuring a canister containing a filter medium to evidence use. The canister has an opening through which air enters and has a coupling for attachment to the mask of a standard self contained breathing apparatus in place of a connection to an air tank. When so connected, air drawn into the mask passes through the filter medium within said canister. A use-evidencing mechanism is operatively connected to the canister to indicate use of the air filtering system. This mechanism can be non-reusable covers applied over the opening and coupling, or a sealed package containing the air filtering system. Such devices provide an indication of previous use of the filtering system and inhibit a fire fighter from using the system in an unauthorized manner.

Inventors

  • 👤 Dennis Smith
  • 👤 Frances G. Morton
  • 👤 Karen Nelson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 17:08
CPC Classifications
A; A62; A62B; A62B23/00; A62B23/02; A62B18/00; A62B18/08; A62B18/088; A62B25/00; A62B9/00

Claims Analysis

Total Claims: 24
Claim 1
Independent Claim 108 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for fire fighters in imminently life-threatening situations and for encouraging its limited use to the imminently life-threatening situations, said method comprising the steps of: configuring a smoke filter in a use-evidencing manner so that use of the smoke filter for breathing is permanently indicated; equipping the fire fighter with a self-contained breathing apparatus including a face mask connected by a conduit to a tank of breathable air; interfacing the smoke filter with the fire fighter's face mask to filter air breathed by the fire fighter when the tank of breathable air is depleted.
Claim 2
Independent Claim 108 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for fire fighters in imminently life-threatening situations and for encouraging its limited use to the imminently life-threatening situations, said method comprising the steps of: configuring a smoke filter in a use-evidencing manner so that use of the smoke filter for breathing is permanently indicated; equipping the fire fighter with a self-contained breathing apparatus including a face mask connected by a conduit to a tank of breathable air; interfacing the smoke filter with the fire fighter's face mask to filter air breathed by the fire fighter when the tank of breathable air is depleted.
Claim 3
Dependent Claim 24 words
A method as recited in claim 1, further comprising the step: before the interfacing step, storing the smoke filter in the fire fighter's coat.
Claim 4
Dependent Claim 24 words
A method as recited in claim 1, further comprising the step: before the interfacing step, storing the smoke filter on a fire fighter's belt.
Claim 5
Dependent Claim 50 words
A method as recited in claim 1, further comprising the step: before the interfacing step, removing a regulator and hose from the fire fighter's face mask, wherein the smoke filter sealingly interfaces the face mask during said interfacing step to prevent smoke from entering the interior of the face mask.
Claim 6
Dependent Claim 21 words
The method as recited in claim 3, wherein the use-evidencing covers are attached to the inlet and outlet by non-readhering adhesives.
Claim 7
Independent Claim 225 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: configuring a smoke filter with a use-evidencing mechanism so that use of the smoke filter for breathing is permanently indicated; providing the smoke filter to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus including a face mask connected by conduit to a tank of breathable air for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the smoke filter into said non-breathable environment; said fire fighter depleting an air supply in the self-contained breathing apparatus; said fire fighter disconnecting the face mask from the tank of breathable air; said fire fighter breaching said use-evidencing mechanism to access said smoke filter, whereby use of said smoke filter is evidenced; said fire fighter interfacing the smoke filter with the fire fighter's face mask to filter air breathed by the fire fighter through the smoke filter; after exiting the non-breathable environment, a third party inspecting the use-evidencing mechanism; and said fire fighter accounting for use of said smoke filter.
Claim 8
Independent Claim 225 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: configuring a smoke filter with a use-evidencing mechanism so that use of the smoke filter for breathing is permanently indicated; providing the smoke filter to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus including a face mask connected by conduit to a tank of breathable air for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the smoke filter into said non-breathable environment; said fire fighter depleting an air supply in the self-contained breathing apparatus; said fire fighter disconnecting the face mask from the tank of breathable air; said fire fighter breaching said use-evidencing mechanism to access said smoke filter, whereby use of said smoke filter is evidenced; said fire fighter interfacing the smoke filter with the fire fighter's face mask to filter air breathed by the fire fighter through the smoke filter; after exiting the non-breathable environment, a third party inspecting the use-evidencing mechanism; and said fire fighter accounting for use of said smoke filter.
Claim 9
Independent Claim 226 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: configuring a smoke filter with a use-evidencing mechanism so that use of the smoke filter for breathing is permanently indicated; providing the smoke filter to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus including a face mask connected by conduit to a tank of breathable air for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the smoke filter into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter disconnecting the face mask from the tank of breathable air; said fire fighter breaching said use-evidencing mechanism to access said smoke filter, whereby use of said smoke filter is evidenced; said fire fighter interfacing the smoke filter with the fire fighter's face mask to filter air breathed by the fire fighter through the smoke filter; after exiting the non-breathable environment, a third party inspecting the use-evidencing mechanism; and said fire fighter accounting for use of said smoke filter.
Claim 10
Independent Claim 226 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: configuring a smoke filter with a use-evidencing mechanism so that use of the smoke filter for breathing is permanently indicated; providing the smoke filter to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus including a face mask connected by conduit to a tank of breathable air for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the smoke filter into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter disconnecting the face mask from the tank of breathable air; said fire fighter breaching said use-evidencing mechanism to access said smoke filter, whereby use of said smoke filter is evidenced; said fire fighter interfacing the smoke filter with the fire fighter's face mask to filter air breathed by the fire fighter through the smoke filter; after exiting the non-breathable environment, a third party inspecting the use-evidencing mechanism; and said fire fighter accounting for use of said smoke filter.
Claim 11
Independent Claim 214 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: placing a hoodless, compact mouthpiece and smoke filter in a use-evidencing container; providing the hoodless compact mouthpiece and smoke filter in a use-evidencing container to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the hoodless compact mouthpiece and smoke filter in a use-evidencing container into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter breaching said use-evidencing container to access said hoodless compact mouthpiece and smoke filter, whereby use of said hoodless compact mouthpiece and smoke filter is evidenced; said fire fighter using said hoodless compact mouthpiece and smoke filter to breathe within said non-breathable environment; after exiting the non-breathable environment, inspecting the use-evidencing container by a third party; and accounting for use of said hoodless compact mouthpiece and smoke filter by said fire fighter.
Claim 12
Independent Claim 214 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: placing a hoodless, compact mouthpiece and smoke filter in a use-evidencing container; providing the hoodless compact mouthpiece and smoke filter in a use-evidencing container to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the hoodless compact mouthpiece and smoke filter in a use-evidencing container into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter breaching said use-evidencing container to access said hoodless compact mouthpiece and smoke filter, whereby use of said hoodless compact mouthpiece and smoke filter is evidenced; said fire fighter using said hoodless compact mouthpiece and smoke filter to breathe within said non-breathable environment; after exiting the non-breathable environment, inspecting the use-evidencing container by a third party; and accounting for use of said hoodless compact mouthpiece and smoke filter by said fire fighter.
Claim 13
Dependent Claim 16 words
The method as recited in claim 8, wherein the use-evidencing container is an air-evacuated foil wrapper.
Claim 14
Independent Claim 219 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: covering an inlet of a hoodless smoke filter and an outlet of an associated mouthpiece with use-evidencing removable covers; providing the hoodless compact mouthpiece and smoke filter with use-evidencing covers to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the hoodless compact mouthpiece and smoke filter with use-evidencing covers into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter breaching said use-evidencing container to access said hoodless compact mouthpiece and smoke filter whereby use of said hoodless compact mouthpiece and smoke filter is evidenced; said fire fighter using said hoodless compact mouthpiece and smoke filter to breathe within said non-breathable environment; after exiting the non-breathable environment, inspecting the use-evidencing covers by a third party; and accounting for use of said hoodless compact mouthpiece and smoke filter by said fire fighter.
Claim 15
Independent Claim 219 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: covering an inlet of a hoodless smoke filter and an outlet of an associated mouthpiece with use-evidencing removable covers; providing the hoodless compact mouthpiece and smoke filter with use-evidencing covers to a fire fighter for use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the hoodless compact mouthpiece and smoke filter with use-evidencing covers into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter breaching said use-evidencing container to access said hoodless compact mouthpiece and smoke filter whereby use of said hoodless compact mouthpiece and smoke filter is evidenced; said fire fighter using said hoodless compact mouthpiece and smoke filter to breathe within said non-breathable environment; after exiting the non-breathable environment, inspecting the use-evidencing covers by a third party; and accounting for use of said hoodless compact mouthpiece and smoke filter by said fire fighter.
Claim 16
Independent Claim 231 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: equipping a hoodless, compact mouthpiece and smoke filter with a use-evidencing mechanism wherein use of the hoodless, compact mouthpiece and smoke filter is visually and irrevocably detectable once used; providing the hoodless compact mouthpiece and smoke filter with use-evidencing mechanism to a fire fighter for possible use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the hoodless compact mouthpiece and smoke filter with a use-evidencing mechanism into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter breaching said use-evidencing mechanism to access said hoodless compact mouthpiece and smoke filter whereby use of said hoodless compact mouthpiece and smoke filter is evidenced; said fire fighter using said hoodless compact mouthpiece and smoke filter to breathe within said non-breathable environment; after exiting the non-breathable environment, inspecting the use-evidencing mechanism by a third party; and accounting for use of said hoodless compact mouthpiece and smoke filter by said fire fighter.
Claim 17
Independent Claim 231 words
A method for storing and preparing a personal air filtering device for smoke inhalation protection for a fire fighter in imminently life-threatening situations and for encouraging its limited use by the fire fighter to the imminently life-threatening situations, said method comprising the steps of: equipping a hoodless, compact mouthpiece and smoke filter with a use-evidencing mechanism wherein use of the hoodless, compact mouthpiece and smoke filter is visually and irrevocably detectable once used; providing the hoodless compact mouthpiece and smoke filter with use-evidencing mechanism to a fire fighter for possible use in an imminently life-threatening situation; providing the fire fighter with a self-contained breathing apparatus for primary use during exposure to a non-breathable environment; said fire fighter primarily using said self-contained breathing apparatus in a non-breathable environment and transporting the hoodless compact mouthpiece and smoke filter with a use-evidencing mechanism into said non-breathable environment; said self-contained breathing apparatus failing to provide breathable air to said fire fighter; said fire fighter breaching said use-evidencing mechanism to access said hoodless compact mouthpiece and smoke filter whereby use of said hoodless compact mouthpiece and smoke filter is evidenced; said fire fighter using said hoodless compact mouthpiece and smoke filter to breathe within said non-breathable environment; after exiting the non-breathable environment, inspecting the use-evidencing mechanism by a third party; and accounting for use of said hoodless compact mouthpiece and smoke filter by said fire fighter.
Claim 18
Dependent Claim 24 words
The method as recited in claim 11, further comprising the step of: after accounting for the use of the smoke filter, documenting said use.
Claim 19
Dependent Claim 59 words
The method as recited in claim 11, wherein said use-evidencing mechanism comprises a first cover adhesively applied over the opening in said mouthpiece and a second cover adhesively applied over the aperture of said filter, wherein adhesive employed to hold the first and second covers in place cannot be used to reapply said first and second covers after removal.
Claim 20
Dependent Claim 72 words
The method as recited in claim 11, wherein said use-evidencing mechanism comprises a first cover adhesively applied over the opening in said mouthpiece and a second cover adhesively applied over the aperture of said filter, each of said first and second covers having a tab for grasping by a user to aid in removing that respective cover and having an indicator which denotes removal from one of said mouthpiece and said filter.
Claim 21
Dependent Claim 39 words
The method as recited in claim 11, wherein said use-evidencing mechanism comprises a container which encloses said mouthpiece and said filter and having a closure that inhibits reclosing to thereby provide an indication that the container has been opened.
Claim 22
Dependent Claim 13 words
The method as recited in claim 15, wherein said container comprises a bag.
Claim 23
Dependent Claim 15 words
The method as recited in claim 15, wherein said container comprises an air evacuated enclosure.
Claim 24
Dependent Claim 53 words
The method as recited in claim 17, wherein said container further comprises a bag having a seam which defines a sealed first portion containing said enclosure and an open second portion which has flaps that can be grasped by a user to aid in opening the seam to gain access to said enclosure.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1999-06-11 1999-12-11 2000-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2003-06-11 2003-12-11 2004-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2007-06-11 2007-12-11 2008-06-11 $7700.00 Window Closed / Lapsed

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