Electric motor driven compressor for acoustic warning system - has cover plate clamped by folded rim metal ring on body

摘要

The electric motor driven compressor is used for acoustic warning systems. The warning system compressor cannot be detached nor dismantled and the flow rate cannot be altered. The cover (10) of the compressor is fastened by a holding ring (11) whose edges are turned over inwards to clamp cover on compressor body. This ring is a section of a metal tube. Alternatively this clamping ring can be made by injection moulding of a metal or another material. The compressor body has projecting brackets for holding screws.