A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided within the compressor main body. A motor casing is operably connected to the compressor main body, and a high speed electric motor provided within the motor casing. The motor includes a motor rotor, a motor stator and a motor shaft for driving at least one of the male and female rotors. A speed ratio of the motor shaft and the at least one of the male and female rotors driven by the motor shaft is in a range of 2:1 to 1:2.

Oil free screw compressor

A non-aqueous dispersion comprising the dispersion polymerization reaction product of an ethylenically unsaturated monomer and a nonlinear, random acrylic polymer stabilizer is disclosed. Related coatings, methods, and substrates are also disclosed.

Non-aqueous dispersions comprising a nonlinear acrylic stabilizer

In an electric pump system, hydraulic fluid that is stored in an oil pan is supplied to a transmission mechanism through an oil passage by driving an oil pump with the use of a motor. An EOPECU estimates a hydraulic pressure of the hydraulic fluid on the basis of a driving current for the motor and a rotation speed of the motor, and executes drive control on the motor on the basis of the estimated hydraulic pressure value.

Electric pump system

An electric pump device of an aspect of the invention includes a state determination unit and a gain adjusting unit The state determination unit determines whether or not the electric pump device is in a stable state where a required oil pressure is supplied to a hydraulic operating device by maintaining a rotation state of a motor The gain adjusting unit adjusts a gain for a current feedback control so as to reduce responsiveness of the current feedback control when the state determination unit determines that the electric pump device is in the stable state

Electric pump device

The purpose of the invention is to provide a coolant supply device and supply method that can appropriately control the spraying of coolant using a single parameter. To that end, the invention is provided with a pump (101) that supplies coolant to a tool (D), a measurement device (22) that measures the discharge pressure of the pump (101), and a control device (50). The control device (50) has a function for determining, from the rotation rate of the pump (101), the coolant flow path diameter for the tool (D) and the target value for the pump discharge pressure (target pressure) when the tool (D) is drilling.

Coolant supply device and supply method

PROBLEM TO BE SOLVED: To provide a coolant pump device, achieving energy-saving and reducing wasteful consumption of a coolant. SOLUTION: A control device 14 calculates a target flow rate according to a target pressure-flow rate characteristic in which the product of pressure of the coolant by the flow rate is constant corresponding to the pressure of the coolant detected by a pressure sensor 9. A control signal is generated from a deviation between the target flow rate and the current flow rate detected by a flow rate sensor 10, and output to an inverter to control the rotational frequency of a motor 5. A pump 4 driven by the motor 5 performs constant horsepower operation in which the product of the pressure of the coolant by the flow rate is constant, whereby the power consumption of the motor 5 can be reduced and the wasteful consumption of the coolant can be reduced. COPYRIGHT: (C)2005,JPO&NCIPI

Coolant pumping device and drilling device

PROBLEM TO BE SOLVED: To consume power according to the required coolant discharged amount and pressure SOLUTION: This device has a fixed positive displacement pump 2 to discharge coolant from a tank 1 and to supply the coolant to a drill 4, etc, a pressure sensor 9 to detect pressure of the coolant discharged from the fixed positive displacement pump 2, and a motor 5 controlled by a controller 7 inputted with an AC power supply 6, an external operation command signal and the detected pressure The motor 5 and the fixed positive displacement pump 2 are directly connected COPYRIGHT: (C)2004,JPO

High pressure coolant supplying device

PROBLEM TO BE SOLVED: To form a finished surface with excellent aesthetic appearance on the external surface of a building and save energy by suppressing the rise of temperature of the building. SOLUTION: This laminate comprises a base layer A, a heat-insulating undercoat layer B formed by a binder and a primer with hollow particles, a waterproof layer C formed by a film waterproof material, a nonaqueous synthetic resin p, a denatured silicate compound q in which a 1-2C alkyl group and a 3C or more alkyl group are mixed with an equivalent ratio of 95:5-50:50, and an uppercoat layer D formed by a coating material having, as a necessary component, an infrared reflective powder r. COPYRIGHT: (C)2009,JPO&INPIT

Heat shielding and insulating laminate

PROBLEM TO BE SOLVED: To provide a carbon nanotube dispersion in which the condensation of carbon nanotubes is suppressed, and exhibiting high dispersion stability, and a carbon nanotube/rubber composite having excellent electrical conductivity using the same.SOLUTION: A carbon nanotube dispersion composed of: carbon nanotubes alkyl diphenyl oxide disodium sulfonate; and a dispersion medium is blended with a rubber latex, and next, salt precipitation is performed to obtain a carbon nanotube/rubber composite. In the carbon nanotubes, the average diameter Av and diameter distribution 3 σ preferably satisfy 0.60>3 σ/Av>0.20. Further, the dispersion medium preferably being water.

Carbon nanotube dispersion and its utilization

PROBLEM TO BE SOLVED: To provide a renovation method suitable for the renovation of an existing coating film of an organic coating material which is formed on the outdoor side surface of a heat insulating wall. SOLUTION: In the renovation method of the building outer wall by applying at least one kind of a color coating material on the existing coating film surface formed on the outdoor side of the building outer wall, the color coating material containing 0.1-20 pts.wt. silicate compound expressed in terms of SiO 2 per 100 pts.wt. solid portion of a resin for the coating material which has -20 to 80°C glass transition temperature wherein the silicate compound contains a modified silicate having 1-2C linear alkyl group and ≥3C branched alkyl group which are coexisted in the equivalent ratio of 95:5 to 50:50 and capable of forming a coating film having ≥20% infrared reflection factor and ≥40 g/(m 2 24hr) water vapor permeation rate is used. COPYRIGHT: (C)2007,JPO&INPIT

Method of renovating building outer wall

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