摘要:
A power tool has a tool spindle, a hammer unit, a drive including a motor having a motor driven shaft, a motion conversion gear for generating reciprocating piston movement, and a disengageable coupling located between the motor and the motion conversion gear and engaging the hammer unit. The coupling has two coupling parts which held apart, one of the coupling parts being axially fixed and another of the coupling parts being axially movable and arranged on the motor-driven shaft rotatable relative to the shaft. A gear linkage connects the another coupling part with the shaft and transmits portions of a torque of the shaft to the another coupling part in form of an axially directed closing force.
摘要:
A process for the preparation of a base oil and middle distillate which is stable to oxidation and low temperature from a mineral oil fraction having a boiling range above 350.degree. C., by, in a first step, converting the mineral oil fraction on a hydrocracking catalyst under hydrocracking conditions to an extent of from 20 to 80% by weight into fractions which boil below 360.degree. C., separating the reactor effluent, if necessary, into liquid and gas phases in a high-pressure separator, treating the entire reactor effluent or only the liquid phase, directly or after removal of the fractions boiling below 360.degree. C. by distillation, in a second step with hydrogen at from 200.degree. to 450.degree. C. and at from 20 to 150 bar in the presence of a catalyst which contains a crystalline pentasil-type borosilicate zeolite, alumina and/or amorphous alumosilicate as the carrier material and one or more metals from Group VIb and/or Group VIII of the Periodic Table and phosphorus, and, after distillation of the hydrogenation product, obtaining a middle distillate in the boiling range from 180.degree. to 360.degree. C. having a pour point of below -30.degree. C. and an oxidation-stable residue having a boiling point >360.degree. C., a viscosity index of from 110 to 135 and a pour point of below -12.degree. C.
摘要:
In a drive-in apparatus for driving fasteners such as clips, nails, tacks, staples and the like in a workpiece, a solenoid for actuating impact blade which ejects the fastener is movably arranged in the apparatus housing. The solenoid includes an exciter coil formed with a central opening in which a cylindrical armature connected to the impact blade is magnetically accelerated in forward direction and returns to the starting position by a resetting spring. The exciter coil is also movably guided within the housing and spring biased in the forward direction by another biasing spring having a progressive elasticity characteristic. Depending on the steepness of the characteristic line of the second biasing spring, the backstrokes of the apparatus and the force necessary for tacking operation can be adjusted in broad range.
摘要:
A mixture of gases containing hydrogen and at least one further component, for example nitrogen and argon, is enriched in hydrogen in a separation stage by adsorption, or cooling and partial condensation and/or rectification and/or scrubbing. Upstream of this separation stage, at least part of the hydrogen is separated by membrane diffusion, thereby resulting in a highly improved process as compared to using either the separation stage or membrane diffusion alone, especially in connection with gaseous mixtures having components which are to be used at high pressures, e.g., a purge gas from an ammonia synthesis gas process.
摘要:
Novel quinoxaline-di-N-oxide derivatives of the general formula ##STR1## in which R.sub.1 is hydrogen or straight-chain or branched-chain alkyl having 1 to 4 carbon atoms,R.sub.2 and R.sub.3 independently of one another are each straight-chain or branched-chain alkyl having 1 to 4 carbon atoms, or together with the N atom they form a heterocyclic ring which is unsubstituted or is substituted by alkyl having 1 to 4 carbon atoms, and which has 4 to 5 ring carbon atoms and optionally an oxygen atom as further hetero atom,R.sub.4 is hydrogen, methoxy, methylthio, hydroxyl, fluorine, chlorine, bromine or cyano,A is alkylene having 1 to 4 carbon atoms, with the proviso that if R.sub.4 has a meaning other than cyano, A is 1,2-ethylene, and R.sub.1 is hydrogen,including the acid addition salts thereof; processes for producing them; compositions containing these compounds; and the use thereof. The novel active substances serve to combat pathogenic microorganisms in the field of veterinary medicine. They are effective in the case of diseases of the respiratory tract in poultry, and infections of the intestinal tract and of the urogenital system in domestic animals and productive livestock. They are in addition suitable as a feed additive for promoting the growth of animals. Depending on the type of application, the novel active substances may be administered perorally or via the abomasum or directly by injection, the active substances being applied on their own or in combination with customary inert carriers, either in the solid form or in the liquid form.
摘要:
A shaft seal for a rotatable shaft which is surrounded by a substantially rigid structural element, has a ring-shaped body portion adapted to be supported by the structural element and having an axis and two axially spaced end faces, a radially displaceable ring-shaped inner portion located radially inwardly of the body portion, extending in an axial direction, and together with the body portion forming an axially extending gap, at least one sealing lip provided in the inner portion and subjected to radial vibrations during rotation of the shaft which vibrations are transmitted to the radially displaceable inner portion and displace the latter, and elements for damping radial vibrations of the sealing lip.
摘要:
Novel quinoxaline-di-N-oxide derivatives of the formula ##STR1## are disclosed, wherein R represents a hydrogen atom, an alkyl group of 1 to 12 carbon atoms, a cyanoalkyl group containing 1 to 4 carbon atoms in the alkyl moiety or an allyl group, andA represents a straight-chain or branched alkylene bridge member containing 1 to 4 carbon atoms.These compounds are useful for the control of pathogenic microorganisms and for stimulating the growth of domestic animals and productive livestock.
摘要:
A device for adjusting the camber and/or the toe of a vehicle wheel of a motor vehicle includes a wheel carrier, which has a wheel-side carrier part and an axle-side guide part, between which rotary parts that can be rotated relative to each other are arranged, wherein at least one of the rotary parts can be adjusted in both rotational directions by means of a drive and a gear stage in order to adjust the toe and/or the camber. The gear stage for the rotary part is configured as harmonic drive gear train having a driving, elliptical drive disk, and a stationary, internally toothed ring gear.
摘要:
A vehicle wheel includes a wheel rim on which is provided a plurality of plate-like covering elements, which are mounted so as to be pivotable about a pivot axis, for temporarily closing off associated apertures in the wheel rim, wherein each covering element can be displaced along the pivot axis under centrifugal force counter to the force of a restoring element and is connected to the wheel rim by means of a coupling element, which imparts positive guidance during a displacement movement, in such a way that the covering element can be pivoted between a radially inner open position and a radially outer closed position, wherein a pivot axis rod arranged on the outer side of the wheel rim is connected to the covering element via a hydraulic or pneumatic vibration damper.
摘要:
An optoelectronic semiconductor chip includes a semiconductor layer sequence having at least one active layer. Furthermore, the semiconductor chip has a top-side contact structure on a radiation main side of the semiconductor layer sequence and an underside contact structure on an underside situated opposite to the radiation main side. Furthermore, the semiconductor chip includes at last two trenches that extend from the radiation main side towards the underside. As seen in a plan view of the radiation main side, the top-side contact structure and the underside contact structure are arranged in a manner spaced apart from one another. Likewise as seen in a plan view of the radiation main side, the trenches are located between the top-side contact structure and the underside contact structure.