Patent ID: 11957943
Assignee: SIEMENS SCHWEIZ AG
Field: Environmental technology (Chemistry)
Classification: CPC A | IPC A

Claim 0:
1. A blocking apparatus comprising:
a holding apparatus;
a receiving element rotatably mounted in the holding apparatus about an axis of rotation, the receiving element defining a through-opening with a through-axis coaxial or parallel to the axis of rotation;
a wrap spring held mechanically prestressed in the holding apparatus, with at least one winding arranged around the receiving element; and
a thermocouple made of a material having a lower melting temperature than a lowest melting temperature in the holding apparatus and/or than a melting temperature of the wrap spring;
wherein the thermocouple holds at least one end of the wrap spring with respect to the holding apparatus in the prestressed state in such a way that the receiving element can be freely rotated in both drive directions about the axis of rotation; and
the receiving element is blocked against movement in one of the two drive directions in the relaxed state of the wrap spring and in the triggered state of a thermal fuse.