Device for limiting the prestress of a control spring
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United States of America Patent
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Jul 20, 1999
Grant Date -
N/A
app pub date -
Jun 26, 1997
filing date -
Jun 26, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for limiting the prestress of a control spring (17) which is particularly well-suited for pressure control valves and similar equipment, the control spring (17) being located in a spring housing (15) and supported on a spring plate (18) which can be adjusted by means of a rotating adjustable spindle (19) that is provided with a thread for prestressing the control spring (17), includes an end stop (22), which, by means of its own adjusting device which can be operated from outside the spring housing (15), can be adjusted and locked at any desired location between two end positions. When the spring plate (18) is moved in the direction which increases the prestress of the control spring (17), the spring plate (18) makes contact with the locking end stop (22), as a result of which the prestress of the control spring (17) is restricted to the preselected value.
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