Firestopping apparatus with airflow-blocking elements

A firestopping apparatus for mounting into a through-penetrating opening in a wall, comprising:

• an elongated open-ended sleeve with a long axis, a transverse axis, and with first and second open ends, and which at least partially defines an interior space therein, which interior space allows passage of at least one elongate tube therethrough;
• and,
• first and second airflow-blocking elements, each of the first and second airflow-blocking elements being positioned proximate the first open end of the sleeve and extending at least generally along the transverse axis of the sleeve so as to comprise a first transverse end that is proximate a first transverse sidewall of the sleeve and a second transverse end that is proximate a second transverse sidewall of the sleeve;
• wherein the first airflow-blocking element is slidably movable in a first direction generally along the long axis of the open-ended sleeve toward a long-axis centerpoint of the open-ended sleeve, which moving of the first airflow-blocking element in the first direction generally along the long axis of the open-ended sleeve, urges at least a portion of a first resiliently compressible body of the first airflow-blocking element in a first direction along an actuation axis, toward a first, blocking position in which a first mating surface of the first resiliently compressible body is proximate to a second mating surface of the second airflow-blocking element;
• and,
• wherein the first airflow-blocking element is slidably movable in a second direction that is generally opposite the first direction, away from the long-axis centerpoint of the open-ended sleeve, which moving of the first airflow-blocking element in the second direction generally along the long axis of the open-ended sleeve, urges at least the portion of the first resiliently compressible body of the first airflow-blocking element in a second direction along the actuation axis, toward a second, open position in which the first mating surface of the first resiliently compressible body is separated from the second mating surface of the second airflow-blocking element.