SPRING BRAKE ACTUATOR AND RETAINING DEVICE FOR SUCH SPRING BRAKE ACTUATOR

A spring brake actuator () for use in a commercial vehicle includes a cylinder housing () including a spring brake piston () for applying a braking force, a spring guide () attached to the spring brake piston (). The spring guide () includes a valve () and a retaining device () for retaining the valve (). The retaining device () includes a basic body () and clamping portions () for clamping the retaining device () to the spring guide (). The clamping portions () are arranged at the basic body () along a circumference () thereof, and the clamping portions () are spaced apart from each other forming slits () between the clamping portions () to allow for a circulation of air through the slits ().