SPRING BRAKE ACTUATOR AND BRAKE RELEASE MECHANISM FOR SUCH SPRING BRAKE ACTUATOR

The invention relates to a brake release mechanism (24, 124, 224) for a spring brake actuator (2), in particular a parking or emergency spring brake actuator (2) for use in a commercial vehicle, said release mechanism (24, 124, 224) comprising a brake release bolt (30, 130, 230) having a threaded portion (34, 134, 234), a running nut (12, 112, 212) engaging the threaded portion (34, 134, 234), said running nut (12, 112, 212) being adapted to axially travel along the threaded portion (34, 134, 234) in order to move a spring brake actuator piston (8) against a force of an actuator power spring (6), an indicator device (32, 132, 232) comprising an indicator pin (26, 226) being at least partially accommodated in a receiving space (40) of the release bolt (30, 130, 230), wherein the indicator device (32, 132, 232) further comprises a pin actuator (16, 116, 216) for axially moving the pin (26, 226) relative to the receiving space (40). It is proposed according to the invention that the pin actuator (16, 116, 216) comprises an indicator cap (36, 136, 236) being attached to the pin (26, 226), the indicator cap (36, 136, 236) comprising a basic body (42, 142, 242) and at least one spacing element (38, 138, 238) being attached to the basic body (42, 142, 242), the spacing element being (38, 138, 238) configured to abut against the running nut (12, 112, 212).