Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1982-08-04
1984-12-18
Michalsky, Gerald A.
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
13762565, 13762568, 251325, 338 42, G05D 1620
Patent
active
044885741
ABSTRACT:
A pressure control valve arrangement includes a control slide valve body which is slidably accommodated in a central bore of a valve housing. The control slide valve body is acted upon at one of its axial sides by the controlled pressure, and at its other axial side by a tappet of a proportional electromagnet. The proportional magnet has a magnet housing which is rigidly connected to the valve housing. To provide a pressure control valve arrangement in which the accuracy of the pressure control is not influenced by disturbing factors, a pressure indicator is accommodated in the magnet housing; at least the pressure-responsive member of the pressure indicator is acted upon by the controlled pressure, which is supplied thereto through a connecting bore in the magnet housing and a part of the central bore of the valve housing in which the controlled pressure prevails. A connecting line of the pressure indicator is lead to the exterior of the magnet and valve housings for derivation of the measured value therefrom. The measured value may then be compared with a reference value, and the result of the comparison may be used for controlling the coil of the proportional magnet, possibly after amplification.
REFERENCES:
patent: 3921666 (1975-11-01), Leiber
patent: 4051451 (1977-09-01), Kurtz et al.
patent: 4133511 (1979-01-01), Hartmann et al.
patent: 4318333 (1982-03-01), Cemeska
patent: 4413648 (1983-11-01), Walters et al.
Fox John C.
Mannesman Rexroth GmbH
Michalsky Gerald A.
Striker Michael J.
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