Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1988-09-06
1989-04-11
Rivell, John
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
137498, 251 16, F16K 1726
Patent
active
048196886
ABSTRACT:
A hydraulic fuse or cut-off device divides fluid flow into: (i) a primary fluid stream; and (ii) a secondary fluid stream having a substantially constant, but small ratio of flow to said primary stream. The secondary stream exerts pressure on a timing piston which thereby monitors the entire flow and causes the fuse to cut-off when a predetermined volume of fluid has passed through the device. The fuse includes a regulating piston for building inlet pressure to a value sufficient to develop the power necessary to drive the timing piston. Greater simplicity of the component parts and decreased sensitivity to contamination results from the use of a small fluid orifice to control the secondary stream. This is achieved by fitting the regulating piston with an inwardly directed flange, just touching the peripheral surface of a slightly tapered, central pin--whereby the taper of the pin causes the orifice to be created as the regulating piston is caused to slide as a result of the primary fluid flow.
REFERENCES:
patent: 236151 (1881-01-01), Furney
patent: 2512190 (1950-06-01), Waterman
patent: 2554390 (1951-05-01), Stevenson
patent: 2555334 (1951-06-01), Green
patent: 2592486 (1952-04-01), Stark
patent: 2592487 (1952-04-01), Stark
patent: 2656855 (1953-10-01), Booth
patent: 2772065 (1956-11-01), Thomas
patent: 3494375 (1970-02-01), Henaughan
patent: 3880398 (1975-04-01), Rubrich
Brunswick Corporation
Greif Art
Rivell John
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