Ōsaka, Japan
Ōsaka, Japan

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Patent
Kurimoto Ltd. | Date: 2017-02-08

An object of the present invention is to provide a brass alloy, in which the content of Bi is reduced to secure a good recyclability while maintaining the dezincification corrosion resistance required for a member for water works, and which is capable of exhibiting an erosion-corrosion resistance and excellent mechanical properties to be used as a member for water works. This brass alloy contains: 24% by mass or more and 34% by mass or less of Zn; 0.5% by mass or more and 1.7% by mass or less of Sn; 0.4% by mass or more and 1.8% by mass or less of Al; 0.005% by mass or more and 0.2% by mass or less of P; and 0.01% by mass or more and 0.25% by mass or less of Pb; with the balance being copper and an unavoidable impurity(ies). Note, however, that in cases where the above mentioned copper alloy has a content of Sn of less than 1.0% by mass, the contents of Al and Sn in % by mass satisfy the Inequality: Al + 2 Sn 2.8.


Patent
Kurimoto Ltd. | Date: 2015-04-08

A two-shaft continuous kneading machine is disclosed wherein airtightness in a housing is assured by a simple means without using a mechanical seal. A magnetic coupling mechanism is formed between the mechanism in the housing (2) including shafts (3) of the kneading machine (1) and a carrier (5) arranged outside the housing (2). The magnetic coupling mechanism includes gear portions (3c) formed on the shafts (3), a ring gear (4) rotatably supported in the housing (2) on the outer periphery of the axial ends of both shafts (3), and a carrier (5) rotatably supported coaxially with the ring gear (4) in the outside of the housing (2). When the carrier (5) is driven, the ring gear (4) rotates because of the magnetic action between magnet portions (4b, 5b), and the shafts (3) rotates because of the meshing of the gear portions (3c, 4a). Since the inside of the housing can be sealed, airtightness can be assured.


Patent
Kurimoto Ltd. | Date: 2013-02-21

A brass alloy is provided having good mechanical properties and castability, and excellent general-purpose properties, while its dezincification corrosion is inhibited. The brass alloy contains 0.4% by mass or more and 3.2% by mass or less of Al; 0.001% by mass or more and 0.3% by mass or less of P; 0.1% by mass or more and 4.5% by mass or less of Bi; 0% by mass or more and 5.5% by mass or less of Ni; 0% by mass or more and 0.5% by mass or less of Mn, Fe, Pb, Sn, Si, Mg, and Cd, respectively; and Zn; the balance being Cu and a trace element or elements. The zinc equivalent (Zneq) calculated from the content of Zn and other elements, and the content of Al (% by mass) satisfy the following Equations (1) and (2): Zneq+1.7Al35.0(1) Zneq0.45Al37.0(2).


Patent
Kurimoto Ltd. | Date: 2014-10-08

A magneto-rheological fluid includes a magnetic particle mixture, and a dispersion medium for dispersing the magnetic particle mixture. The magnetic particle mixture contains the first magnetic particles and the second magnetic particles. The first magnetic particles have an average particle diameter of 1 m or more and 30 m or less. The second magnetic particles are particles of a soft magnetic material, and have an average particle diameter of 50 nm or more and 200 nm or less. A ratio of the second magnetic particles in the magnetic particle mixture is 10% by mass or more and 40% by mass or less.


Patent
Kurimoto Ltd. | Date: 2013-02-27

A copper alloy having excellent sliding performance is produced without relying on lead or molybdenum. The copper alloy contains a sintered Cu_(5)FeS_(4) material produced by sintering a raw material powder that comprises Cu, Fe and S and is produced by a gas atomizing method.


Patent
Kurimoto Ltd. | Date: 2013-12-03

Provided is a copper alloy for use in a member for water works, which has not only a reduced lead content and the lowest possible Ni content, but also a reduced Bi content, and which still exhibits suitable properties. The copper alloy includes: less than 0.5% by mass of Ni; 0.2% by mass or more and 0.9% by mass or less of Bi; 12.0% by mass or more and 20.0% by mass or less of Zn; 1.5% by mass or more and 4.5% by mass or less of Sn; and 0.005% by mass or more and 0.1% by mass or less of P; wherein the total content of Zn and Sn is 21.5% by mass or less, and the balance is a trace element(s) and Cu.


Patent
Kurimoto Ltd. | Date: 2013-08-22

A magneto-rheological fluid includes: a magnetic particle mixture; and a dispersion medium in which the magnetic particle mixture is dispersed. The magnetic particle mixture includes first magnetic particles and second magnetic particles. The first magnetic particles have an average particle size greater than or equal to 1 m and less than or equal to 50 m. The second magnetic particles have an average particle size greater than or equal to 20 nm and less than or equal to 200 nm, and have surfaces provided with a surface modified layer. A proportion of the second magnetic particles in the magnetic particle mixture is greater than or equal to 2 wt % and less than or equal to 10 wt %.


Patent
Kurimoto Ltd. | Date: 2014-05-21

A kneader/stirrer is provided which has a high self-cleaning ability and can be operated for a long period of time. The kneader/stirrer includes two rotary shafts (4) extending parallel to each other in the processing chamber (2), first regular triangular impellers (3) mounted to one of the rotary shafts (4) so as to be arranged in the axial direction of the rotary shaft (4), and second regular triangular impellers (3) mounted to the other rotary shaft (4) at the same axial positions as the respective first impellers (3). The impellers (3) are fixed to the respective rotary shafts (4) at points offset from the centers of the respective impellers (3) in a predetermined direction by a predetermined distance such that when the two rotary shafts (4) rotate in the same direction at the same speed, each pair of first and second impellers (3) are eccentrically pivoted, with one apex of one of the pair of impellers kept in contact with or in close proximity to the contour of the other impeller, thereby scraping off polycondensation resin (material to be processed) adhered to the other impeller, while scraping off resin adhered to the inner wall of the processing chamber (2) with one of the apexes nearest to the inner wall. Thus, this device has a higher self-cleaning ability than conventional devices using disk-shaped impellers, and thus can be stably operated for a long period of time.


Patent
Japan Remote Control Co. and Kurimoto Ltd. | Date: 2014-10-30

Inside a stick base, a variable resistor and a magnet brake are attached to a turnable first bridge. An A/D converter adapted to convert an analog value corresponding to a turning angle, which is obtained from the variable resistor, to a digital value, and a controller adapted to drive the magnet brake when a signal from the A/D converter is given and coincides with a predetermined value are provided. On the basis of data retained in a memory, current is applied to a coil of the magnet brake. Doing so makes it possible to electrically change operational feeling when turning a stick.


Patent
Kurimoto Ltd. | Date: 2014-07-23

A copper alloy having excellent sliding performance is produced without relying on lead or molybdenum. The copper alloy contains a sintered Cu_(5)FeS_(4 )material produced by sintering a raw material powder that comprises Cu, Fe and S and is produced by a gas atomizing method.

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