Patent ID: 8381825

Claim:
A fire protection system engaging a wall, the wall having a first side and an opposite second side and an edge defining a hole through the wall, the system comprising: a pipe coupling having an end facing the first side of the wall, the end of the pipe coupling being aligned with the hole in the wall; a sprinkler engaging the coupling and extending through the hole in the wall; an escutcheon defining an outer surface defining a passage through the escutcheon and extending through the hole in the wall, a portion of the sprinkler disposed within the passage; a strut having a plurality of prongs extending from a base, the base abutting the coupling, each prong being biased toward the edge of the hole and having an engagement portion abutting the edge of the hole, the base having an outer perimeter and an inner edge defining an opening in the base, the opening further defining a longitudinal axis of the strut, the opening being sized to surround the sprinkler and to allow for lateral movement of the sprinkler with respect to the longitudinal axis within the opening.