Pressure regulator for maintaining a stable flow level of a fluid
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United States of America Patent
Stats
-
Feb 13, 1996
Grant Date -
N/A
app pub date -
Oct 21, 1994
filing date -
Nov 25, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flow regulator for maintaining a stable rate of flow of a fluid in a flow channel (2), comprising a flow-actuating element (4) which is movable under the influence of a pressure drop in the fluid flow, and a throttle valve (10) for regulating the fluid flow under the influence of said element (4). The fluid-actuated element (4) constitutes a control element for a servo means (11) comprising a pilot valve (17) for controlling the movement of a drive means (12) coupled to a valve body (19) in the throttle valve (10), and which, by means of the servo means (11), is arranged to be moved in a smooth manner independently of sudden changes in the fluid flow. The control element is influenced by a prestressed spring (9) acting in the opposite direction to the flow direction, so that the control element (4) is moved in the flow direction only when the rate of flow exceeds a preselected level.
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