Abstract: 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.

Abstract: 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.

Abstract: The present invention relates to a safety device for spring brakes comprising a C-clamp, the opening of which is just fit to accommodate the edges of the two chambers and the diaphragm of an air brake; and a body plate, which is being cast with the C-clamp as one integral body and is welded onto an outer surface of the first chamber of the air brake. The safety device can securely engage the two chambers to prevent the spring, the diaphragm and the second chamber from bursting out of the first chamber, causing damage to properties and/or injuries to anybody in the surrounding area.

Abstract: The present invention relates to a safety device for spring brakes comprising a C-clamp, the opening of which is just fit to accommodate the edges of the two chambers and the diaphragm of an air brake; and a body plate, which is being cast with the C-clamp as one integral body and is welded onto an outer surface of the first chamber of the air brake. The safety device can securely engage the two chambers to prevent the spring, the diaphragm and the second chamber from bursting out of the first chamber, causing damage to properties and/or injuries to anybody in the surrounding area.