Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1979-02-22
1980-08-05
Cohan, Alan
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
251333, F16K 31122
Patent
active
042157153
ABSTRACT:
An improved poppet valve is provided which includes a piston having a stem and a disk-shaped head attached to the stem. The piston is mounted to reciprocate in a cylinder, the internal wall of which has a seat formed therein to define a flow orifice between the cylinder seat and the disk-shaped head. The piston head includes a flat face on one side thereof and a working surface on the opposite face which is adapted to define the flow orifice with the cylinder seat. The working surface includes an annular face having a specifically defined shape and a portion connecting the annular face to the stem. The shape of the annular face significantly decreases the operating time of the valve to discharge the cylinder via the flow orifice. In one embodiment, the surface of the annular face has a conical shape and forms an angle in the range of 20.degree. to 60.degree. with the longitudinal axis of the stem. In a second embodiment, the surface of the annular face is in the shape of an arc having a radius of curvature in the range of 0.156" to 0.252".
REFERENCES:
patent: 3247865 (1966-04-01), Doyle
patent: 3249145 (1966-05-01), Alberani
patent: 3358964 (1967-12-01), Cohen
patent: 3818921 (1974-06-01), Peczkowski
patent: 3873063 (1975-03-01), Illing
patent: 3982559 (1976-09-01), Ochs
Cohan Alan
General Pneumatics Corporation
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