Flow control devices
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 15, 1994
Grant Date -
N/A
app pub date -
Aug 19, 1993
filing date -
Sep 2, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fluid flow device for minimizing the effects of fluctuating pressures on the fluid flow rate has a variable restriction in the fluid path through the device arranged to produce a lesser restriction as the pressure difference between the inlet and outlet of the device increases, and vice versa. This first, variable restriction is formed by an inlet tube and a blocking member. A second, constant restriction for the fluid flow is formed by the tube and a parallel bore through which the tube extends, to produce a pressure drop which creates a pressure differential across a diaphragm balanced by a spring. A change of the pressure differential across the device also changes the pressure differential on the diaphragm, which is connected to the blocking member, so that movement of the diaphragm has the effect of varying the restriction in the manner described to reduce flow rate variations through the device.
First Claim
Other Claims data not available