摘要:
A slipping torque changing mechanism for an impact tool includes a driving source for generating a rotational motion. A motion converting mechanism is connected with this driving source for converting the rotational motion of the driving source into a reciprocating motion. An impact mechanism is connected with this motion converting mechanism for transmitting the reciprocating motion to a tool end. A rotational motion transmitting mechanism is disposed separately from the motion converting mechanism for transmitting the rotational motion of the driving source to the tool end. A plurality of clutches, having different slipping torques, are disposed at different portions on the rotational motion transmitting mechanism.
摘要:
A percussion hammer for a tool includes a rotational drive source. A motion converting mechanism is connected to the rotational drive source for convening rotational movement of the rotational drive source into reciprocating movement. A striking mechanism is connected to the motion converting mechanism, and has a drive cylinder. A rotation transmitting mechanism is operative for transmitting rotational movement from the rotational drive source to the tool. A drive wheel is connected to the rotational drive source, and extends around the drive cylinder. A coupling member is connected to the drive cylinder, and extends around the drive cylinder. The coupling member is movable in a percussion axis direction. A movable adjustment member is connected to the coupling member for selectively connecting and disconnecting the coupling member to and from the drive wheel. Teeth are formed on an outer circumferential surface of the drive cylinder. A casing has an inner circumferential surface formed with a projection or a recess extending in the percussion axis direction. A sleeve has an outer circumferential portion which mates in shape with the projection or the recess of the casing. The sleeve engages the casing via the projection or the recess of the casing, and is movable in the percussion axis direction. Teeth are formed on the sleeve, and mate in shape with the teeth on the drive cylinder. The adjustment member is connected to the sleeve for selectively moving the teeth on the sleeve into and out of engagement with the teeth on the drive cylinder.
摘要:
There is provided an Al-based alloy sputtering target, which can provide an enhanced deposition rate (or sputtering rate) when the sputtering target is used, and which can preferably prevent the occurrence of splashes. The Al-based alloy sputtering target of the present invention includes Ta and may preferably include an Al—Ta-based intermetallic compound containing Al and Ta, which compound has a mean particle diameter of from 0.005 μm to 1.0 μm and a mean interparticle distance of from 0.01 μm to 10.0 μm.
摘要:
A portable belt sander having a drive pulley capable of being produced at a limited period. The sander includes a main body accommodating therein a motor, a drive shaft rotationally driven by the motor, a drive pulley coupled to the drive shaft, a driven shaft, and an endless polishing belt mounted between the drive pulley and the driven pulley. The drive pulley includes a base section coupling the drive shaft and made from a rigid material, and an outer low hardness section made from an elastomer material and disposed over an outer peripheral surface of the base section and integrally therewith by injection molding. Mating surfaces between the base section and the outer section are irregularly formed.
摘要:
A reinforced therapeutic tube which is excellent in kink resistance, pressure resistance and flexibility. The tube is made of an elastomeric material with a reinforcing material spirally embedded into the tube wall, and at least one of the tubular parts where no spiral reinforcing material exists. The tip end of the reinforcing material which is wound in spiral shape is bent parallel to the inside surface of the tube and inward of the tube for at least one or more pitches of the spiral, and at least the tip of the reinforcing material bent is buried into the inside wall of the tube.
摘要:
The present invention provides a technique capable of suppressing generation of splash even at high-speed deposition by an Al-based alloy sputtering target containing Ni and a rare earth element, wherein when crystallographic orientations , , , and in a normal direction of each sputtering surface at a surface part of the Al-based alloy sputtering target, a ¼×t (t: thickness of the Al-based alloy sputtering target) part thereof and a ½×t part thereof are observed by an electron backscatter diffraction pattern method, the Al-based alloy sputtering target satisfies the requirement (1) that, when a total of area fractions of the ±15°, ±15° and ±15° is defined as R (as for Rat each part, the R at the surface part is defined as Ra, the R at the ¼×t part is defined as Rb, and the R at the ½×t part is defined as Rc), R is 0.35 or more and 0.80 or less; and the requirement (2) that each of the Ra, the Rb and the Rc falls in the range of ±20% of an average R value [Rave=(Ra+Rb+Rc)/3].
摘要:
A Zn—Al alloy excellent in static deformability as well as dynamic deformability and applicable to large-sized structures, and a method for production thereof. The alloy contains 30-99% Zn, with the remainder being Al and inevitable impurities, and has a metallographic structure in which the α phase or α′ phase having an average grain size no larger than 5 μm contains the β phase finely dispersed therein, the Al inclusions have a maximum equivalent circle diameter no larger than 50 μm and are free of pores no smaller than 0.5 mm in terms of equivalent circle diameter, and the macrosegregation of Al is less than 3.0% and the microsegregation of Al is less than 2.0%. (% means mass %.)