SLIDING SHUTTER Russian patent published in 2013 - IPC F16K3/28 F16K3/30 

FIELD: machine building.

SUBSTANCE: sliding shutter includes housing with compensation chamber, supply and discharge branch pipes, slide connected to stock, seal and drive. Slide is made in the form of elastic shell and equipped with adapter rigidly attached to embedded part that is installed in shell end face. Annular spring having the possibility of being pressed from above with adapter connected to stock is installed in axial passage of shell. Lower ring of annular spring is installed on shell end and equipped with a tube passed by means of connection strap to compensation chamber cavity. In adapter there is drain passage attaching the axial passage of housing above shell through tube to compensation chamber equipped with bypass valve.

EFFECT: simpler design; possibility of compensating contact voltages on slide, control and maintenance of contact voltages at boundary of slide and wall of housing, keeping of serviceability of device at pumping of abrasive-containing liquids through it.

2 dwg