Patent ID: 8745944

Claim:
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 at least the first airflow-blocking element comprises a resiliently compressible material that at least generally circumferentially surrounds, and is supported by, a support shaft that is connected to the sleeve by a biasing suspension that biases the first airflow-blocking element toward the second airflow-blocking element along a biasing axis.