Removable lock for cap of casing open at one side has cap carrying locking hooks to fit in recesses in casing

摘要

The lock consists of locking hooks (e.g. 2) on the cap (1) running parallel to it and facing the same way. When the filter (14, 15) is inserted and the cap is moved into position on the casing (22), the hooks engage with recesses (23) in the casing. Other hooks (e.g. 8) face the opposite way to hold the edges of the recesses after the cap is pushed back.