Patent ID: 11911565
Assignee: FREUDENBERG MEDICAL, LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 3:
4. A twist to lock tracheostoma heat and moisture exchanging device, comprising:
a housing having a first opening that is adapted to open to a tracheostoma and a second opening that opens to ambient;
a foam filter disposed in the housing;
a closure member including a body portion and a plurality of legs each engaged with a corresponding channel in an inner surface of the housing, the body portion being movable from an open position spaced from the housing to a closed position engaging the housing;
a locking mechanism including a plurality of ledges disposed in the inner surface of the housing that in a first position are each engageable with at least one of the legs of the closure member to prevent movement of the closure member to close the passage and wherein the closure member is rotatable relative to the housing to a second position wherein the plurality of legs are out of alignment with the plurality of ledges to allow movement of the closure member to the closed position; and
a detent feature on each of the plurality of legs of the closure member for engaging a corresponding one of a plurality of detent features on the housing for retaining the closure member in either of the first position and the second position.