Regulating and controlling device for a fluid pressure booster i

Details Regulating and controlling device for a fluid pressure booster i Regulating and controlling device for a fluid pressure booster i

1994-02-25

1995-11-07

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417 12, 417304, F04B 4906

Patent

active

054643287

ABSTRACT:
A regulating and controlling device for a fluid pressure booster installation includes a motor-driven pressure generating unit, a check valve, a relief valve and a pressure switch. The pressure switch has a first cylinder-piston arrangement for connecting the drive motor to a source of electrical energy. The first cylinder-piston arrangement includes a piston rod for contacting an intermediate member. The device has, as an improvement, a second cylinder-piston arrangement, a third cylinder-piston arrangement and a gear unit. The improvement prevents longer-lasting circulation delivery and, accordingly, an overheating of the working fluid. This also avoids any need for the pressure switch to be constructed so as to be adjustable in operation with respect to switch-off pressure or any need to be adjusted when changing the pressure value of the relief valve used for adjusting the pressure at the pressure outlet of the device.

REFERENCES:
patent: 1486533 (1924-03-01), Muffly
patent: 2356306 (1944-08-01), Davis
patent: 2482732 (1949-09-01), Hollerith
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patent: 2639083 (1953-05-01), Rambo
patent: 3294104 (1966-12-01), Mercier
patent: 3446238 (1969-05-01), Nostrud et al.
patent: 3469528 (1969-09-01), East
patent: 3521975 (1970-07-01), Sicho
patent: 3694105 (1972-09-01), Martin
patent: 4476889 (1984-10-01), Haynes

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