Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1982-05-24
1984-03-06
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
137846, 137847, 137849, F16K 1718
Patent
active
044348100
ABSTRACT:
A bi-directional pressure relief valve includes a cylindrical main body portion defining a flow path through the valve and terminating in an asymmetrical lip portion having a curved contour about an axis of curvature extending perpendicularly to the flow path and a linear contour which is substantially normal to the curved contour. The lip portion has a normally closed slit formed through it and expands to open the slit to permit flow in one direction in response to pressure differentials across the lip portion above a first pressure differential, regains its undeformed shape to close the slit and check flow at pressure differentials below the first differential and above a second pressure differential, and collapses in a predictable and repeatable manner to open the slit to permit flow in an opposite direction at pressure differentials below the second pressure differential. A preferred embodiment includes an annular flange formed about the lip portion which facilitates the mounting of the valve in a conduit. If desired, the pressures at which flow can occur through the valve may be increased by providing the valve with stiffening ribs projecting radially outwardly of the main body portion.
REFERENCES:
patent: 996588 (1911-06-01), Kennedy
patent: 1051554 (1913-01-01), Champion
patent: 2569073 (1951-09-01), Robinson
patent: 2674318 (1954-04-01), Sutliff
patent: 3155110 (1964-11-01), Hoffman
patent: 3159176 (1964-12-01), Russell et al.
patent: 3245428 (1966-04-01), Klimak
patent: 3504699 (1970-04-01), Grise
patent: 3517682 (1970-06-01), Smith
patent: 3822720 (1974-07-01), Souza
patent: 4181145 (1980-01-01), Mitchell
patent: 4341239 (1982-07-01), Atkinson
Nilson Robert G.
Vernay Laboratories, Inc.
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