1
Brandon Clarence W: Apparatus for producing variable high frequency vibrations in a liquid medium. Brandon Orpha B, Hardin N A, Newton Catherine H, Wright Hazel H, October 16, 1973: US3765804 (68 worldwide citation)

Apparatus and methods to form and utilize pulsating fluid pressures in oil well formation treating of producing wells or as a part of secondary or tertiary recovery processes. Self induced or artificially induced liquid-gas phase changes occur in-situ which are utilized to selectively and variably t ...


2
Strohmeier Fred, Witt Klaus: Pumping apparatus for delivering liquid at high pressure.. Hewlett-Packard, April 5, 1989: EP0309596-A1 (47 worldwide citation)

A pumping apparatus for delivering liquid at a high pressure, in particular for use in liquid chromatography, comprises two pistons (10, 20) which reciprocate in pump chambers (7,18) , respectively. The output of the first pump chamber (7) is connected via a valve (13) to the input of the second pum ...


3
Lundquist Ingemar H: Pump actuator including rotatable cams. Origo, Wilcox Robyn, March 26, 1974: US3798982 (44 worldwide citation)

The intravenous feeding pump actuator of the present invention comprises a plurality of cam assemblies (preferably two) rotating on a common shaft, one pinned, or otherwise affixed to the shaft and the other assembly mounted on a quill shaft encompassing the common shaft; the cams being provided wit ...


4
Andersen Henning: A pump, power plant, a windmill, and a method of producing electrical power from wind energy. Elsam, Andersen Henning, MIKKELSEN Jacob, March 23, 2006: WO/2006/029633 (35 worldwide citation)

Power plant (10) for the generation of electrical power using wind power or wind energy, comprising a plurality of windmills (12, 14, 16) each comprising a mill tower, a rotor (18, 20, 22) with a shaft (32) being rotatably journalled in said mill tower, a fluid pressure generator (34) mounted in sai ...


5
Bosch Paul: Regulating system for pumps. Robert Bosch, Striker Michael S, June 24, 1975: US3891354 (27 worldwide citation)

A motor, such as an internal combustion engine or an electric motor, drives two or more pumps, which pump fluid through a discharge system, and a speed measuring device is provided for producing a signal when the speed of the motor is reduced due to the load on the motor reaching a predetermined hig ...


6
Michael S Lukich: Hydraulic power control system. Caterpillar, Steven R Janda, R Carl Wilbur, June 11, 1996: US05525043 (24 worldwide citation)

Large work vehicles include hydraulic implement control systems having an hydraulic pump being driven by an internal combustion engine. The subject invention provides a method and apparatus for controlling such an hydraulic system to limit engine lug. The invention includes a sensor for producing a ...


7
Bailey Brett M, Nippert Andrew H: Digital controlled fluid translating device. Caterpillar, June 18, 2003: EP1319836-A2 (20 worldwide citation)

The displacement of fluid translating devices are normally controlled by changing the angle of an eccentric or a cam plate to change the pumping stroke of the pistons within the device. In the subject arrangement, the displacement of the fluid translating device (12) is controlled by controlling the ...


8
Soon bae Yang, Tae kyung Kim, Sung min Park, Tae won Kim: Method of controlling motor drive speed. LG Electronics, Greenblum & Bernstein, August 21, 2007: US07259533 (19 worldwide citation)

Disclosed is a method of controlling drive speed of a motor operating in overload conditions. The method includes the steps of: driving the motor at a predetermined reference speed; detecting phase voltage and phase current applied to the motor; determining whether or not the motor is operating in o ...


9
William J Buote: Method for providing constant flow in liquid chromatography system. Zymark Corporation, John E Toupal, Harold G Jarcho, September 19, 1995: US05450743 (19 worldwide citation)

A method of operating liquid chromatography apparatus. The method includes the steps of determining a given rate of liquid flow desired from a piston pump to the column; establishing for the piston a predetermined stroke length and rate of reciprocation for providing the given rate of liquid flow; d ...


10
Meister Harry M, Kelley James B, Holmes Gordon E: Liquid proportioning system. SAID Meister by said Kelley and Holmes, Fay Sharpe and Mulholland, March 26, 1974: US3799402 (18 worldwide citation)

The specification and drawings disclose embodiments of a liquid proportioning apparatus which provides an exactly proportioned mixture of two liquids. The disclosed apparatus uses a pair of pistons which are interconnected such that one serves to drive the other. The driving piston is actuated by on ...