Check valve

Fluid handling – Line condition change responsive valves – Direct response valves

Patent

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Details

137527, F16K 1503

Patent

active

042574510

ABSTRACT:
A check valve of the type in which a pair of valve members are hingedly mounted to a transverse pin for pivoting movement between respective open positions and complementary closed positions in which the valve members together engage a valve seat. Torsional spring means are provided to bias the valve members to their closed positions. This means comprises a single length of wire formed into three windings which extend transversely within said passageway, two of which windings separately apply a biasing force to the respective valve members while the third, being between the other two, is wound on an axis offset from the axes of the other two, the arrangement being such as to substantially prevent dissipation of stored compressive energy from either of the respective co-axial windings to the other. Also disclosed is a bearing arrangement for valve pins which are of a material harder than the valve body. According to this arrangement, the pins are supported in plates of a material of hardness similar to the material of the pins set into the internal wall of the valve body.

REFERENCES:
patent: 2596787 (1952-05-01), Ottinger
patent: 3678958 (1972-07-01), Satterwhite
patent: 4005732 (1977-02-01), Buckner

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