Shut-off valve

Details Shut-off valve Shut-off valve

1996-02-28

1999-11-02

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

425563, 425564, F16K 31124

Patent

active

059751274

ABSTRACT:
A shut-off valve is mounted between an injection nozzle and a mold. The valve has a piston within the valve body, A material passage is formed through the piston having an exit aperture and a terminal end. When material is injected through the material passage, the piston is forced to a downstream position which allows the material to flow into the mold. A pneumatic pressure applied to the piston forces the piston to a closed position after injection.

REFERENCES:
patent: 3295169 (1967-01-01), Moslo
patent: 4010903 (1977-03-01), Sakuri et al.
patent: 5012839 (1991-05-01), Rogers et al.
patent: 5193575 (1993-03-01), Do
patent: 5198238 (1993-03-01), Baxi

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