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US 5,647,356 AGranted
Respirator cartridge with sealing fit test structure and method of use
AssigneeDonaldson Company, Inc.
InventorsRichard J. Osendorf, David W. Lee
Life of this patent
Estimating the term…
Abstract
A respirator cartridge is disclosed including a gas cartridge and a particulate cartridge. The gas cartridge is joined to the particulate cartridge with a double-sided adhesive seal including a closed cell foam central portion. The particulate cartridge is provided with a plenum defining an air inlet with a length and width sized smaller than a user's finger to permit the user's finger to close off the air intake of a respirator during a fit check. A release liner covers one face of the adhesive seal prior to assembly of the particulate cartridge to the gas cartridge. Indicia regarding use of the particulate cartridge may be provided on the release liner.
Claims25
A respirator cartridge comprising:
- a first cartridge housing construction defining a passageway for air;
- a first filter arrangement disposed in the first cartridge housing construction for filtering air passing through the passageway of the first cartridge housing construction;
- a seal member including:
- a central portion comprising a resilient compressible material;
- a first field of adhesive adhering the central portion to the first cartridge housing construction;
- and
- a second field of adhesive on the central portion which is not adhering the central portion to the first cartridge housing construction;
- the first cartridge housing construction including a planar platform wherein the first field of adhesive adheres the central portion of the seal member to the planar platform;
- the first cartridge housing construction further including a lip surrounding the planar platform.
6 more elements
A respirator cartridge comprising:
- a filter arrangement for filtering air;
- a cartridge housing construction defining a passageway for the air, the filter arrangement disposed in the passageway, the cartridge housing construction having a curved side wall portion defining an air inlet to the passageway, the air inlet having an elongated slotted configuration with a length and a width sized smaller than a user's finger wherein a maximum length is greater than a maximum width, the curved side wall portion having a curvature sized to match the curvature of the user's finger in a forwardly curved state, whereby the user's finger closes the air inlet to the cartridge housing construction when the user's forwardly curved finger is positioned over the air inlet.
A method of using a respirator cartridge comprising the steps of:
- providing a first cartridge portion having a first filter arrangement contained with the first cartridge portion for filtering air;
- providing a seal member attached to the first cartridge portion;
- removing a release liner to expose an adhesive field of the seal member;
- and
- attaching a second cartridge portion having a second filter arrangement to the exposed adhesive field of the seal member to form an airtight seal between the first cartridge portion and the second cartridge portion thereby forming the respirator cartridge, wherein the respirator cartridge defines an air inlet and an air outlet to provide for an air passageway through both the first and second cartridge portions, wherein the air outlet of the respirator cartridge defines an attachment mechanism for removably attaching to a respirator mask.
2 more elements
A respirator cartridge for a respirator mask comprising:
- a first cartridge housing construction defining a passageway for air;
- a first filter arrangement disposed in the first cartridge housing construction for filtering air passing through the passageway of the first cartridge housing construction;
- a seal member including:
- a central portion comprising a resilient compressible material;
- a first field of adhesive adhering the central portion to the first cartridge housing construction;
- and
- a second field of adhesive on the central portion which is not adhering the central portion to the first cartridge housing construction;
- the first cartridge housing construction including a planar platform wherein the first field of adhesive adheres the central portion of the seal member to the planar platform;
- the first cartridge housing construction further including a lip surrounding the planar platform;
- a second cartridge housing construction defining a passageway for air;
- a second filter arrangement for filtering air passing through the passageway of the second cartridge housing construction, wherein the second field of adhesive is between the central portion of the seal member and a portion of the second cartridge housing construction and the second field of adhesive adheres the central portion of the seal member to the second cartridge housing construction;
- wherein one of the first cartridge housing construction and the second cartridge housing construction defines an air inlet to provide an entrance for air into the respirator cartridge;
- and
- wherein the other of the first cartridge housing construction and the second cartridge housing construction defines an air outlet to provide an exit for the air to the respirator mask.
11 more elements
Dependencies are inferred from the claim text.