HIGH-PRESSURE STEAM VESSEL WITH PROTECTIVE DEVICE Russian patent published in 2013 - IPC A47J27/08 

FIELD: process engineering.

SUBSTANCE: proposed vessel comprises the tank and cover each being equipped with long handle to allow their dense connection by applying peripheral segments along bayonet joint line. Note here that seal ring is arranged between tank edge and cover edge. Note here that it differs in that it combines, at least, two opening and closing protective devices. Note also that first protective device comprises safety valve with its body retained in opened position by spring-loaded slide 10 unless said tank and cover are shifted into closed position on turning two handles so that they are arranged one above the other, that is, with complete superposition of mating peripheral segments. Second protective device lifts seal ring from cover edge by protective element spring-loaded to opened position unless tank and cover are shifted into closed position on turning two handles so that they are arranged one above the other, that is, with complete superposition of mating peripheral segments. Note here that only by turning two handles one above the other into their closed position aforesaid slide moves away or displaces from valve body. Note also that protective cam moves away or can displace from seal ring so that valve body and seal ring shift in their closed or sealed positions.

EFFECT: ruled out undesirable removal of cover.