Abstract: A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side.

Abstract: A lubricating oil composition for transmissions having improved fuel saving properties, excellent metal fatigue prevention properties, and heat resistance containing: a lubricating base oil containing (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 105 or greater, a % Cp of 85 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less and (B) a monoester-based base oil having a 100° C. kinematic viscosity of 2 to 10 mm2/s; (C) a phosphorus acid ester; and (D) a boronated ashless dispersant, the ratio of the mass percent of boron to the mass percent of phosphorus in the composition (B/P) being from 0.07 to 0.42, and the composition having a 100° C. kinematic viscosity of 2.5 to 4.0 mm2/s is described.

Abstract: A lubricating oil composition comprising a lubricating base oil, and a mixture and/or a reaction product of (A) 0.01-0.5% by mass of at least one compound selected from among acid phosphates represented by formula (1) or formula (2), and (B) 0.01-2% by mass of an alkylamine represented by formula (3), based on the total weight of the composition, wherein the acid value due to component (A) is 0.1-1.0 mgKOH/g. [R1 and R2 represent hydrogen or straight-chain alkyl or straight-chain alkenyl groups, with at least one of R1 and R2 being a C6-12 straight-chain alkyl or straight-chain alkenyl group; R3 and R4 represent hydrogen straight-chain alkyl or straight-chain alkenyl groups, with at least one of R3 and R4 being a C13-18 straight-chain alkyl or straight-chain alkenyl group; and R5 and R6 represent hydrogen or C4-30 branched-chain alkyl groups, with at least one of R5 and R6 being a branched-chain alkyl group.

Abstract: A piezoelectric unit includes a diaphragm made of ceramics, a base portion having a pressure chamber in which the diaphragm is set to a wall and a piezoelectric element having a dielectric layer provided at the opposite side of the base portion with respect to the diaphragm. In the piezoelectric unit, the roughness of a crystal of the outermost interface at the side of the piezoelectric element of the diaphragm is further smoothened than that of a ceramics material which is included in the diaphragm more inside than the interface.

Abstract: A liquid ejecting head that ejects liquid includes a flow path member that includes a plurality of pressure chambers through which the liquid flows, pressure generation elements that include active parts arranged at positions corresponding to the pressure chambers and a common electrode for generating a common potential to the respective pressure chambers, and a conductive member that is electrically connected to the common electrode on the flow path member at the side to which the pressure generation elements are fixed and lowers resistance of the common electrode.

Abstract: A gear oil composition is provided having fuel saving performance and providing gears or bearings with sufficient durability. The composition includes a base oil having a blend of (A) a mineral lubricating base oil having a 100° C. kinematic viscosity of 2 to 6 mm2/s, a % CA of 0.5 or less and a tertiary carbon content of 7% or more and (B) a solvent-refined mineral lubricating oil having a 100° C. kinematic viscosity of 10 to 70 mm2/s in an amount of 2 to 40 percent by mass based on the total base oil composition mass; (D) zinc dialkyldithiophosphate in an amount of 0.02 to 0.5 percent by mass based on the zinc amount; and (E) an alkaline earth metal detergent having a base number of 100 mgKOH/g or greater in an amount of 0.1 to 0.5 percent by mass, based on the metal amount, of the gear oil composition mass.

Abstract: Provided is a liquid ejecting apparatus including a liquid ejecting head that ejects liquid through nozzle openings, and a wiper that sweeps a liquid ejection surface side of the liquid ejecting head, in which the liquid ejecting head includes a nozzle plate having the liquid ejection surface and a protection member that protrudes further on a liquid discharging side than the nozzle plate, and the wiper sweeps a surface of the protection member, which is an exterior surface of the protection member intended to be swept, toward the nozzle plate side, and then the wiper sweeps the liquid ejection surface so that the wiper moves away from the surface of the protection member and comes into contact with a portion between the nozzle openings on the nozzle plate and an end portion of the nozzle plate, which is located on an opposite side in a sweeping direction.

Abstract: A liquid ejecting head includes: a nozzle plate in which a first nozzle row of nozzle openings aligned along a first direction X and a second nozzle row of nozzle openings aligned along the X direction are disposed side by side along a second direction Y, perpendicular to the X direction; and a channel member including pressure generating chambers aligned along the X direction and nozzle communication holes that allow the pressure generating chambers and the nozzle openings to communicate with each other. The nozzle communication holes include first openings communicating with the pressure generating chambers and second openings open to the nozzle plate. The second openings have a width in the X direction larger than a width of the pressure generating chambers, alternatively communicate with the first nozzle row and the second nozzle row, and are alternatively arranged on different sides when viewed in the Y direction.

Abstract: A liquid ejecting head includes a communication hole that has a first opening which communicates with a pressure chamber side where pressure is applied to a supplied liquid at one end and a second opening which communicates with a nozzle side ejecting the liquid to which the pressure is applied at the other end, and communicates the pressure chamber and the nozzle with each other, an opening area of the second opening being larger than an opening area of the first opening. An inclined surface that is directed to the second opening is provided on a side where a distance between an edge of the first opening and an edge of the second opening in the first direction is shorter than on the other end side so that stagnation in the flow of the liquid and reduction in bubble discharge are prevented and stable liquid ejection is achieved.

Abstract: The present invention provides a lubricating oil composition for transmissions which is improved in fuel saving properties and has excellent metal fatigue prevention properties and heat resistance. The lubricating oil composition comprises (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 110 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less, the lubricating oil composition having a 100° C. kinematic viscosity of 2.5 mm2/s or higher and 3.8 mm2/s or lower.

Abstract: A piezoelectric unit includes a diaphragm made of ceramics, a base portion having a pressure chamber in which the diaphragm is set to a wall and a piezoelectric element having a dielectric layer provided at the opposite side of the base portion with respect to the diaphragm. In the piezoelectric unit, the roughness of a crystal of the outermost interface at the side of the piezoelectric element of the diaphragm is further smoothened than that of a ceramics material which is included in the diaphragm more inside than the interface.

Abstract: A flow path unit includes a pressure chamber substrate in which a plurality of pressure chambers are arranged in a first direction; and a piezoelectric element that changes a volume of the pressure chamber, in which a plane shape of an active section of the piezoelectric element is contained such that a width on one side thereof in a second direction crossing the first direction is wider than that on the other side in the second direction. The side on which the width of the active section of the piezoelectric element is great and the side on which the width thereof is smaller in the second direction be alternately disposed each other so that the active sections adjacent to each other are arranged differently from each other in the first direction.

Abstract: A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side.

Abstract: A liquid ejecting head includes: a nozzle plate in which a first nozzle row of nozzle openings aligned along a first direction X and a second nozzle row of nozzle openings aligned along the X direction are disposed side by side along a second direction Y, perpendicular to the X direction; and a channel member including pressure generating chambers aligned along the X direction and nozzle communication holes that allow the pressure generating chambers and the nozzle openings to communicate with each other. The nozzle communication holes include first openings communicating with the pressure generating chambers and second openings open to the nozzle plate. The second openings have a width in the X direction larger than a width of the pressure generating chambers, alternatively communicate with the first nozzle row and the second nozzle row, and are alternatively arranged on different sides when viewed in the Y direction.

Abstract: A liquid-jet head includes: a passage member including a plurality of individual passages and a manifold communicating commonly with the individual passages, the individual passages each having a pressure generating chamber communicating with a nozzle orifice that ejects liquid, the pressure generating chambers being formed on one surface side of the passage member on an opposite side from the nozzle orifices, the individual passages and the manifold communicating with each other through communicating paths, and each adjacent two of the individual passages communicating with each other through the corresponding communicating path; and reinforcement walls each provided between the communicating paths in a parallel direction of the individual passages, the reinforcement walls defining the communicating paths.

Abstract: A liquid ejecting head which ejects a liquid from a nozzle of a nozzle plate by means of pressure change in a pressure chamber includes a first member made of ceramics and including the pressure chamber, a second member located between the first member and the nozzle plate, the second member being made of a metal and including a first flow path at a position upstream to the pressure chamber so as to regulate the amount of liquid which flows into the pressure chamber, and a ground wire that grounds the second member.

Abstract: Provided is a liquid ejecting head which ejects liquid from nozzle holes by changing a pressure in a liquid flow path in a pressure chamber. The liquid ejecting head includes a flow path member which is formed of ceramic, and in which the pressure chamber is formed; and a piezoelectric element which includes at least a first piezoelectric layer which is formed of ceramic. The first piezoelectric layer of the piezoelectric element is bonded to the flow path member, and the first piezoelectric layer faces the pressure chamber.

Abstract: Provided is a liquid ejecting apparatus including a liquid ejecting head that ejects liquid through nozzle openings, and a wiper that sweeps a liquid ejection surface side of the liquid ejecting head, in which the liquid ejecting head includes a nozzle plate having the liquid ejection surface and a protection member that protrudes further on a liquid discharging side than the nozzle plate, and the wiper sweeps a surface of the protection member, which is an exterior surface of the protection member intended to be swept, toward the nozzle plate side, and then the wiper sweeps the liquid ejection surface so that the wiper moves away from the surface of the protection member and comes into contact with a portion between the nozzle openings on the nozzle plate and an end portion of the nozzle plate, which is located on an opposite side in a sweeping direction.

Abstract: A liquid ejecting head that ejects liquid includes a flow path member that includes a plurality of pressure chambers through which the liquid flows, pressure generation elements that include active parts arranged at positions corresponding to the pressure chambers and a common electrode for generating a common potential to the respective pressure chambers, and a conductive member that is electrically connected to the common electrode on the flow path member at the side to which the pressure generation elements are fixed and lowers resistance of the common electrode.

Abstract: An liquid ejecting apparatus includes a head main body which ejects liquid and a flow channel member to which the head main body is fixed, the flow channel member includes a plurality of liquid chambers to which the liquid is supplied, and a filter chamber which communicates with each liquid chamber and in which a filter is provided, the liquid passing through the liquid chamber and the filter chamber is supplied to the head main body, inlets which are opened to the liquid chamber and communicate with each filter chamber, the filter chamber includes a plurality of first filter chambers which are juxtaposed in a first row and a plurality of second filter chambers which are juxtaposed in a second row, the first filter chambers directly communicate with the inlet, and the second filter chambers communicate with the inlet through the communicating flow channel.