Clamp band for spring brakes

A clamp band for spring brakes which comprises an annular clamp band pre-formed with a side wall and a rim extended perpendicularly from a first end thereof, wherein during assembling of a spring brake when an edge of a first chamber, a diaphragm and an edge of a second chamber are positioned in sequential order on the rim a second end of the side wall is deformed to bend inwards to encompass the edge of the second chamber to secure the edges of the two chambers and the diaphragm in place;

• the annular clamp band comprises a first clamp band and a second clamp band having identical semi-annular shape, and each of the first clamp band and the second clamp band has a first end with a first connecting plate extended outward therefrom to connect to a first welding plate and a second end with a second connecting plate extended outward therefrom to connect to a second welding plate;
• the first clamp band and the second clamp band are connected to form the annular clamp band by joining the first welding plate of the first clamp band with the second welding plate of the second clamp band and the second welding plate of the first clamp band with the first welding plate of the second clamp band respectively.