Back to results
US 4,061,271 AGranted
Control system for high pressure hydraulic system
OwnerWade L. Kimbroughinventor
Life of this patent
Estimating the term…
Abstract
In a high pressure liquid system such as those commonly used for cleaning and scaling, a feed pump is connected in series with a high pressure pump. The discharge from the high pressure pump is controlled by a fail-safe pressure responsive valve which is responsive to feed pump pressure.
Claims19
In a liquid system using very high pressures, including
- a. a high pressure pump having
- i. a pressure inlet, and
- ii. a pressure outlet,
- b. a reservoir of liquid,
- c. a discharge,
- d. a pressure conduit connecting the pressure outlet of the high pressure pump to the discharge, and
- e. a control on the discharge;
- The improved system comprising in combination:
- f. a feed pump having
- i. a feed inlet, and
- ii. a feed outlet,
- g. the feed inlet connected to the reservoir of liquid,
- h. the feed outlet connected to the pressure inlet,
- j. a bypass conduit connecting the pressure outlet to the reservoir,
- k. a pressure responsive valve including
- i. a pressure valve at the entrance of the bypass conduit,
- ii. a pressure responsive device for closing said pressure valve,
- m. the high pressure pump outlet pressure urging the pressure valve located at the entrance to the bypass conduit to an open condition,
- n. a normally closed control valve interconnecting the pressure responsive device to the feed outlet,
- o. the pressure responsive device closing the pressure valve when pressurized, and
- p. said control valve responsive to the control on the discharge.
18 more elements
In a hydraulic system using very high pressures having
- a. a high pressure pump having
- i. a pressure inlet and
- ii. a pressure outlet,
- b. a reservoir of liquid,
- c. a discharge,
- d. a pressure conduit connecting the pressure outlet of the high pressure pump to the discharge,
- e. a bypass conduit connecting the outlet of the high pressure pump to the reservoir, and
- f. a pressure valve located at the entrance to the bypass conduit;
- The improved method of regulating the flow of high pressure liquid comprising in combination:
- g. feeding the pressure inlet with pressurized liquid,
- h. operating the pressure valve with a device which is responsive to pressure of the pressure inlet,
- j. isolating the pressure responsive device from exposure to pressure inlet with a normally closed control valve,
- k. operating the control valve with a control located on the discharge.
10 more elements
Dependencies are inferred from the claim text.