Abstract: Disclosed is an installation structure for a dustproof net to be arranged in a machine, which has an engine, a cooling fan for producing cooling air to cool the engine, plural heat exchangers arranged on an upstream side of the cooling fan, and a compartment with the engine, cooling fan and plural heat exchangers accommodated therein, such that the dustproof net is arranged at a position on a side upstream of the heat exchanger located most upstream among the plural heat exchanger relative to a flow of air drawn in by the cooling fan and in isolation from the most upstream heat exchanger to remove dust contained in the air drawn in by the cooling fan. The dustproof net is provided with a support structure for supporting the dustproof net on members that form the compartment.
Type:
Grant
Filed:
July 28, 2010
Date of Patent:
November 27, 2012
Assignee:
Hitachi Construction Machinery Co., Ltd.
Abstract: In a method of manufacturing a copper clad aluminum channel superconductive conductor, an electrically conductive wire comprising a metal or alloy core is formed with a longitudinally extending groove in a surface thereof. A wire made of a material that exhibits superconducting properties within a defined temperature range is soldered into the groove.
Abstract: Systems and methods for optimizing marketing strategies. Various embodiments implement methods which can include generating a plurality of candidate solutions which satisfy pricing rationality constraints. The candidate solutions can be generated when processing resources are available for performing a Monte Carlo algorithm. The candidate solutions can be stored and a master and trade off metric can be selected. Values for these selected metrics can be evaluated (at the candidate solutions) and then input into the approximate efficient frontier algorithm. The algorithm can output an approximate efficient frontier. Users can select any of the efficient solutions on the frontier to obtain associated pricing recommendations by mousing over the efficient frontier. Various metrics associated with the efficient frontier may be updated at about the same time as the master and trade off metrics are selected.
Abstract: This video signal processing apparatus includes a first resolution conversion portion, a first analog video output portion, a digital video output portion and a control portion. The control portion is so formed as to make the first resolution conversion portion convert a video signal to a digital video signal of high definition and make the digital video output portion output the digital video signal of the high definition when recognizing that connection between the digital video output portion and a display is in an on-state, also in a case where a broadcast signal includes a signal for restricting output of the video signal of the high definition.
Abstract: There is provided a high pressure fuel pump control system for an internal combustion engine which enables fuel pressure control with high precision without being restricted by the number of cylinders of the internal combustion engine or the number of phase sensor signals and the number of cam noses which vertically drives a plunger of a high pressure fuel pump even when a camshaft phase varies by a variable valve timing mechanism by using the high pressure fuel pump with a solenoid valve. The control system has a means which changes an effective stroke by driving the solenoid valve in the high pressure fuel pump, and has a means which changes the drive timing of the high pressure fuel pump based on a cylinder recognition value of the internal combustion engine with the cam angle detecting means as an origin.
Abstract: A screw compressor comprising: a pair of male and female screw rotors; and an air-cooled heat exchanger, wherein the air-cooled heat exchanger is provided above a motor for driving the compressor body; wherein, with respect to a cooling wind for the air-cooled heat exchanger, the air-cooled heat exchanger is inclined to the upstream side; wherein the uppermost portion of a unit suction port for the air-cooled heat exchanger cooling winds is positioned below the uppermost portion of the air-cooled heat exchanger positioned at the uppermost portion; wherein the lowermost portion of the unit suction port for the air-cooled heat exchanger cooling wind is positioned below the lowermost portion of the air-cooled heat exchanger positioned at the lowermost portion; and wherein the cooling wind for the air-cooled heat exchanger is exhausted from a ceiling portion of the compressor unit.
Type:
Grant
Filed:
July 31, 2009
Date of Patent:
November 20, 2012
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd.
Abstract: A laser beam direct imaging apparatus and an imaging method which can precisely determine a back-surface-side position with respect to a front-surface-side position even if any kind of photosensitive material is used. In the laser direct imaging apparatus, a laser beam is deflected toward a main scanning direction (X-axis direction) while a workpiece mounted on a table is moved in a sub-scanning direction (Y-axis direction) so that a pattern is imaged on the surface of the workpiece. Hollow pins are disposed on the table so that the tips of the hollow pins 20 project over the surface of the table by a predetermined distance. The workpiece is sucked onto the table so that indentations (indentations by the tips of the hollow pins) are formed on the back surface of the workpiece. When a pattern is imaged on the back surface, imaging is performed with reference to the indentations.
Abstract: There are provided: a pedal operation amount detection unit 12 that detects an operation amount s of the accelerator pedal 11; a speed ratio detection unit 14, 15 that detects a speed ratio e of an input shaft and an output shaft of the torque converter 2; a load pressure detection unit 16 that detects a load pressure P of the hydraulic pump 6; a speed stage detection unit 18 that detects a low speed stage of a transmission 3 capable of varying a speed stage between a low speed stage and a high speed stage; and a speed limiting unit 10 that limits a maximum speed of the engine 1 to a lower speed upon satisfaction of following speed limitation conditions: at least a pedal operation amount s is equal to or greater than a predetermined value s1, a speed ratio e is equal to or less than a predetermined value ea, a load pressure P is equal to or greater than a predetermined value Pa, and the low speed stage of the transmission has been detected.
Type:
Grant
Filed:
October 24, 2008
Date of Patent:
November 20, 2012
Assignee:
Hitachi Construction Machinery Co., Ltd.
Abstract: A method for controlling a self-energizing disc brake having an electric actuator in which an activation force applied to the actuator is amplified using a self-energizing device arranged between the actuator and brake lining is described. The method has a brake application unit for applying at least one brake lining to one side of a brake disc by carrying out an application movement of the brake lining relative to the brake disc, the application movement having at least a first movement component in a direction parallel to a rotational axis of the brake disc and a second movement component in a direction tangential to the rotational axis of the brake disc. The method includes also controlling at least one electromotive drive for activating the brake application unit. Rotation of the shaft of the electromotive drive is converted to a non-linear displacement of the brake pad in the tangential direction.