SINGLE PASS VALVING Russian patent published in 2011 - IPC B65D35/46 

FIELD: machine building.

SUBSTANCE: single pass valving with system of supply for outlet of fluid substance is pressure tight along its whole length and consists of: source (2) for storage of fluid substance, also, source has orifice; and of valve system connected with orifice of source. The valve system includes: an internal core with inlet orifice for reception of fluid substance into a passage and at least one port orifice from the passage; a hollow flexible membrane with the first and second ends; also, the first end is thicker, than the second end. The hollow flexible membrane is positioned over external surface of the internal core. When fluid substance is pressurised, it flows through at least one port orifice and expands the said membrane outward from external surface of the internal core so, that fluid substance exits from the first end of the hollow flexible membrane. Further, the valve system includes a case covering the flexible membrane and equipped with an outlet orifice for outflow of fluid substance from the valving. At fluid substance pressurising and when pressurising is stopped the first end of the hollow flexible membrane returns to contact with external surface of the internal core before the rest of the hollow flexible membrane returns to contact with external surface of the internal core. There are four versions of the valving.

EFFECT: elimination of impurities ingress into source of fluid substance.

32 cl, 5 dwg