Class / Patent application number | Description | Number of patent applications / Date published |
417300000 | Fluid flow rate responsive | 11 |
20080317608 | Pump Control System - A pumping system in which a pump ( | 12-25-2008 |
20100329898 | COMPRESSOR INLET GUIDE VANE CONTROL - A compressor airflow control assembly is operable to control airflow through a centrifugal compressor. The control assembly includes an air valve mounted in the airflow path to control airflow through the compressor. The control assembly also includes a controller operable to sense an airflow condition and control shifting of the air valve. | 12-30-2010 |
20110200461 | PUMP CONTROL SYSTEM - A pump control system includes a source of pressurized fluid an output valve adjustably controls the flow of pressurized fluid from the source. An output valve control is coupled to the output valve and monitors the actual state of the output valve. The control selectably adjusts the output valve in response to a first control signal. A controller is coupled to the output valve control, the controller receiving information from the output valve control corresponding to the actual state of the output valve and providing to the output valve control the first control signal, the first control signal being applied to the output valve to achieve and maintain a desired state. | 08-18-2011 |
20110318198 | Fluid Flow Rate Compensation System Using an Integrated Conductivity Sensor to Monitor Tubing Changes - An infusion system and method for controlling the fluid flow from a pump includes a pump system that has a controller that utilizes an algorithm to control the flow rate of fluid through tubing. A plurality of electrodes operatively contacts an electrically conductive portion of the tubing that is also acted upon by the pump system. The electrodes monitor electrical properties of the tubing and provide an electric signal indicative thereof to the controller, which varies the flow rate of the fluid through the tubing as a result of the electric signal. | 12-29-2011 |
20130108482 | METHOD AND SYSTEM FOR ATTENTUATING TRANSMISSION OF HIGH AMPLITUDE OSCILLATIONS BY A VACUUM SYSTEM | 05-02-2013 |
20130171010 | MOTOR CONTROL UNIT AND ELECTRIC PUMP UNIT - A control signal output unit obtains a motor control signal by applying a reduction amount for a current command value obtained by an over-power suppression control unit to a current command value from a host control unit. The over-power suppression control unit includes a hydraulic pressure estimation unit that estimates hydraulic pressure, and a current command value correction amount calculation unit that compares a target hydraulic pressure with an estimated hydraulic pressure and outputs the reduction amount for the current command value. Load information indicating whether a load on the pump is a low load or a high load that is higher than the low load is input into a control circuit from the host control unit, and the over-power suppression control unit changes the target hydraulic pressure in accordance with a magnitude of the load indicated by the load information. | 07-04-2013 |
20130195689 | FRONT FORK - A front fork includes a body side tube, an axle side tube, a damper, a reservoir, a damping force adjusting flow passage, and a solenoid valve including a spool housing portion provided at an intermediate position of the damping force adjusting flow passage, a spool valve inserted into the spool housing portion movably in an axial direction, and a solenoid that drives the spool valve in an axial direction, and configured to adjust a flow passage area of the damping force adjusting flow passage. Pressure receiving areas on opposite axial sides of the spool valve on which a pressure in an upstream side of the damping force adjusting flow passage acts are made equal. An upper arrangement passage which is arranged at least higher than the upper end of the spool housing portion is provided in a downstream side of the damping force adjusting flow passage. | 08-01-2013 |
20130195690 | LIQUID NITROGEN PUMP EQUIPMENT LOAD TESTING AND EXPERIMENTING APPARATUS AND TESTING AND EXPERIMENTING METHOD THEREOF - The disclosure relates to liquid nitrogen pump equipment load testing and experimenting apparatus, and testing and experimenting method thereof, used for oil-gas fields or coalbed methane nitrogen foam fracturing equipment testing. A hydraulic damping apparatus unit and a pressure regulation unit are provided; the hydro-mechanical damping apparatus unit comprises a water tank, a pump unit apparatus, and a pipe manifold system connected in sequence. | 08-01-2013 |
20130259715 | MICROSYSTEMS FOR COMPRESSING OR FOR CONVERTING A PRESSURE DIFFERENCE INTO A DISPLACEMENT - A microsystem for converting pressure difference in fluid into mechanical displacement includes input and output nozzles, two interleaved parts, one of which is mobile part, between which the fluid flows. During displacement, the parts define an expanding fluid pocket that moves from the input nozzle to the output nozzle. The microsystem also includes top and bottom planes between which the mobile part is mounted for displacement relative to each plane, an overhanging distal portion along which the fluid flows, and a proximal portion mechanically linked to a plane via a link allowing only longitudinal translation of the proximal portion, and a reinforcement including a first side fastened to one of the planes and, a second side that is either fastened to or in sliding contact with the overhanging distal portion of the mobile part to limit its deformation in a transverse direction perpendicular to the longitudinal direction. | 10-03-2013 |
20140356197 | Remote Drag Hose Pump Control System - A pump control system is described, that is suitable for controlling multiple pumps coupled in series to pump fluids great distances. The apparatus of the invention is particularly well suited for pumping liquid manure or other fluid slurries from a main tank to a pumping field using booster pumps. The apparatus includes a control system that remotely controls functions on the main pump and booster pumps. | 12-04-2014 |
20160131121 | Device for Choking a Fluid Flow and Corresponding Piston Pump for Delivering Fluids - A device for choking a fluid flow, with a pot-like base body, in the base of which a first passage opening is arranged, and a closing body guided axially moveably in the pot-like base body against a spring force of a spring element and having a second passage opening that forms a static choke point with a predefined fixed opening cross section. The closing body in combination with the spring element and the first passage opening forms a dynamic choke point with a dynamic opening cross section that is variably adjustable depending on a pressure difference. | 05-12-2016 |