Apparatus for supplying and controlling hydraulic swaging pressu

Details Apparatus for supplying and controlling hydraulic swaging pressu Apparatus for supplying and controlling hydraulic swaging pressu

1981-06-08

1983-10-04

Husar, Francis S.

Metal deforming

By application of fluent medium, or energy field

Using fixed die

7245302, 29727, 91400, 91410, 91433, 60540, 60541, 60593, B21D 2210

Patent

active

044071507

ABSTRACT:
In an apparatus for forming leak-proof joints between tubes and a tube sheet by the internal application of hydraulic swaging pressure, the flow of pressurized fluid from an adjustable pressure reduction valve is permitted or interrupted by a control valve. An actuator moves the control valve between its flow permitting and interrupting positions in response to a control signal. In the sensor, which is connected to the input and output sides of the control valve, a piston is movable in response to the difference in the input and output pressures to produce the control signal when a predetermined comparative pressure relationship exists.

REFERENCES:
patent: 3585701 (1969-01-01), Stary
patent: 4189983 (1980-02-01), Fassbender et al.

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