The design principle of the SITEMA fall arrester ensures that it can only be opened when the locking system is not loaded, which fully complies with the requirements of current safety regulations. This is to ensure that the device or person can be safely locked in place in the event of a possible fall. However, in practice, there may be special situations where the load remains overshot when the locking system is unloaded or moves slightly downward for other reasons. This situation can place a certain burden on the fall arrester, so in practical applications, the fall arrester often has to lift the load before it can be opened or moved in the direction of the load. 
To solve this problem, this undesirable effect can be avoided if the fall protector is not mounted directly on the frame, but with an additional spring seat. The design of the spring seat can effectively absorb and compensate for the downward movement caused by load overshoot or other reasons, so as to ensure the normal operation of the fall protector. 
By using spring seats, we can achieve several significant advantages. First of all, the fall arrester can be reopened without lifting the load, even in cases where the load is slowly lowered during normal jog operation, e.g. due to a leak in the piston cylinder seal. This greatly improves the efficiency and convenience of the equipment. Secondly, the important safety criterion that "the fall protector can only be released when the rod is not loaded" remains in force and is not subject to any restrictions. This means that our equipment still complies with all the necessary safety standards, while increasing operational flexibility. Finally, the spring seat can also compensate for the lateral deviation between the load guide and the locking rod, eliminating the need for additional compensation measures. This further simplifies the design and operation of the equipment. 
In addition, the design of the spring seat can also improve the durability and reliability of the equipment. Since the spring seat can absorb and compensate for downward movement due to load overshoot or other reasons, the burden on the fall protector can be reduced, thus extending its service life. At the same time, the spring seat also improves the reliability of the equipment, as it provides additional protection and ensures the safety of the equipment even in the event of a failure due to load overshoot or other reasons. Overall, the design of the spring seat is an innovative solution that not only solves the problem of downward movement caused by load overshoot or other reasons, but also improves the efficiency and convenience of the equipment while maintaining important safety standards. This design approach is not only applicable to SITEMA fall arresters, but can also be applied to other devices that need to solve similar problems.