One-way valve for fluid sampler device

Details One-way valve for fluid sampler device One-way valve for fluid sampler device

1976-06-29

1977-09-06

Swisher, S. Clement

Measuring and testing

Measuring vessel

137843, G01N 114, F16K 1504

Patent

active

040460118

ABSTRACT:
A one-way valve for liquid sampler devices and the like which has an effective self-cleaning function for use in sampling liquid or gas fluids containing solids and sticky material. The valve and seat are in a housing where a desired liquid or gas to be sampled is passed with the valve permitting flow in one direction only. The seal will close the input to the housing when flow is attempted in the other direction and prevents same. The valve is of concave shape and made of soft pliable material such as rubber. The valve seat is essentially a flat round disc with a smooth surface and an inlet hole in the center. The soft pliable material valve lays on the seat, unattached, with the outer edges touching the flat seating surface. The concave shape of the valve allows the incoming material to exert its pressure over a large area of the valve, to give maximum lifting force to the valve. This extra force is important when sticky or gummy material is present and on the seat. When the sample has been taken and the valve flattens, the outer rim expands and performs a wiping action with the rim edge against the seat. This wiping action cleans the sealing surface to effect a positive seal. The valve has specific application with sampling devices having pulse relay operators of the pneumatic type.

REFERENCES:
patent: 2214346 (1940-09-01), Pim
patent: 3465595 (1969-09-01), Tansony
patent: 3720109 (1963-03-01), Blechman
patent: 3788145 (1974-01-01), Irwin

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