Device for limiting the prestress of a control spring

Details Device for limiting the prestress of a control spring Device for limiting the prestress of a control spring

1997-06-26

1999-07-20

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

1371165, 251337, G05D 1606

Patent

active

059244437

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.

REFERENCES:
patent: 3068883 (1962-12-01), Brumm
patent: 4696320 (1987-09-01), Bull
patent: 4741359 (1988-05-01), Siebald
patent: 5452741 (1995-09-01), Tomita et al.

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