Abstract: The invention is directed to a closure for a vessel such as a fuel tank or lubricant tank of a portable handheld work apparatus having an internal combustion engine. The closure includes a filling stub formed on the vessel and defining an opening and a cap for closing off the opening seal tight with respect to the ambient when the cap is placed on the filling stub. A holder prevents the cap from being separated from the vessel after the cap has been removed from the filling stub. The holder includes a flexible member having first and second end portions and an elongated flexible segment disposed between the end portions. A first attachment disposed on an inner wall surface of the cap fixedly holds the first end portion on the cap and a second attachment disposed on the vessel fixedly holds the second end portion on the vessel.

Abstract: A method is disclosed for processing a signal having a monochromatic signal component with the aid of a digital filter. The method includes determining the real amplitude, phase and frequency of the monochromatic signal component of the signal. The signal is delayed for a time during which states of the digital filter are set to correspond to the determined real amplitude, the phase and the frequency of the monochromatic signal component. The signal is then applied to the input of the digital filter only after the states of the digital filter are set.

Abstract: The invention is directed to a portable handheld work apparatus such as a motor-driven chain saw. The work apparatus includes a housing having a forward end wall, a rearward end wall defining a plane and a top wall extending between the end walls. A handle is mounted on the top wall for holding and guiding the work apparatus. A work tool is arranged on the forward end wall and a drive motor is mounted in the housing for driving the work tool. A holding lug is provided on the rearward end wall and is pivotable between a rest position wherein the holding lug is recessed in a recess formed in the rearward end wall and an in-use position wherein the holding lug is outside of the recess. The holding lug defines an eyelet through which an operator can pass a rope for holding the work apparatus by attaching the same to a belt or the like thereby freeing the hands of the operator.

Abstract: The invention is directed to a motor-driven chain saw having a housing and a guide bar extending forward of the housing. The guide bar is clamped between the housing and a sprocket wheel cover. A brake device having a trigger configured as a hand guard is mounted in the sprocket wheel cover. The sprocket wheel is brought to standstill by the brake device when the trigger is actuated. With the sprocket wheel cover assembled, the hand guard is disposed transversely in front of the upper handle of the chain saw. In order to obtain a reliable triggering of the brake device, for example, during kickback and for a manual triggering at all areas of the hand guard, the hand guard is supported in a second bearing on the housing of the chain saw when mounting the sprocket wheel cover. In this way, torques acting in a direction opposite to the actuation of the hand guard are substantially avoided which could otherwise occur because of bearing play.

Abstract: The invention relates to a portable handheld work apparatus such as a motor-driven chain saw having an internal combustion engine, a fuel tank and an apparatus housing. The engine has a crankcase and at least one cylinder. The fuel tank is attached to the crankcase at a distance by means of two flanges whereby a mounting space is provided between the flanges, the crankcase and the fuel tank. This mounting space accommodates necessary components of the work apparatus and is closed by cover plates attached to the crankcase and the fuel tank or on the flanges.

Abstract: The invention relates to a work apparatus such as a motor-driven chain saw having an internal combustion engine equipped with an electrical ignition system. Combustion air is supplied via an intake channel and fuel is supplied via a carburetor. The intake channel is provided with a throttle flap and the carburetor with a choke flap. The choke flap is displaceable into a start position by means of an actuating element and a start linkage. In this position, the throttle flap is latched in a pregiven open position. The actuating member for the choke flap is mounted in the forward end portion of a handle attached to the housing and extending in the longitudinal direction thereof. In addition, an operator-actuated lever is configured so as to project outwardly beyond the housing of the handle. Because of this arrangement, the latching between the throttle flap and the choke flap is obtained in a simple manner by latching of the throttle lever journalled in the handle with a switching shaft.

Abstract: The invention in directed to a work apparatus such as a motor-driven chain saw having a housing and an air-cooled internal combustion engine mounted therein. An exhaust-gas muffler is mounted in proximity to the cylinder of the engine. A flow of cooling air for cooling the cylinder is guided transversely through the housing. In order to obtain an efficient cooling, the muffler has an L-shaped housing and is configured to define a conducting wall for guiding the cooling air flow. One leg of the L-shaped housing is disposed approximately parallel to the flow direction of the cooling air on one side of the cylinder while the other housing leg lies transversely to the flow direction thereby causing the air of the air flow to partially back up. In this way, the side of the cylinder facing away from the flow direction is cooled with the cooling air being effective down to the base of the cooling ribs of the cylinder.

Abstract: A protector for bore rods and pump rods that is frictionally connected to the rods comprises an elastomeric body with a metal reinforcement. The elastomeric body comprises a middle section and end pieces whereby the end pieces have a diameter that is reduced relative to a diameter of the middle section. Metal sleeves enclose the end pieces for receiving radially acting forces resulting from heat expansion of the elastomeric body during operation. The length of the metal sleeves is preferably greater than the inner diameter of the metal sleeves. The end pieces that are enclosed by the metal sleeves are radially pre-loaded with respect to the metal sleeves at ambient temperature.

Abstract: The invention is directed to a work apparatus such as a motor-driven chain saw or the like and is especially directed to a one-hand chain saw. The apparatus has a housing for an engine for driving the work tool and an air/fuel-mixture is metered to the engine. The chain saw includes one handle for carrying and guiding the apparatus with the handle including a hold handle portion aligned approximately in the longitudinal axis of the chain saw and disposed above the housing. The handle also includes a bail-type side handle portion arranged at an angle toward the forward end of the hold handle portion. The hold handle portion is widened transversely to the longitudinal axis at its rearward end to permit the one-hand chain saw to be reliably held and guided. The carburetor is mounted in the receiving chamber so that the housing of the work apparatus can be smaller and thereby enable the hold handle portion to be brought closer to the gravity center of the chain saw.

Abstract: An improved process for working-up crude liquid vinyl acetate which contains vinyl acetate, acetic acid, water, and ethyl acetate, possibly together with small amounts of other impurities, by distillation is disclosed, wherein a mixture essentially containing vinyl acetate and water is obtained as the top product and essentially acetic acid is obtained as the bottom product, and a sidestream, in which ethyl acetate is concentrated is removed. According to the process the top product is condensed and, after phase separation, a portion of the vinyl acetate phase is recycled as reflux into the distillation. The improved process involves the introduction of water above the point of introduction of the crude vinyl acetate. Preferably, the water is introduced in an amount which is not greater than the amount required to achieve a maximum water content in the vapors leaving the distillation at the top.

Abstract: The present invention provides combination of materials for strengthening the antithrombotic action of acetylsalicylic acid. It covers a composition which contains diltiazem or a pharmaceutically acceptable acid-addition salt thereof in combination with acetylsalicylic acid. It also forms the new compound diltiazem acetysalicylate. It also covers compositions containing the above and methods for using the compositions or compound.

Abstract: New 1,6-naphthyridinone derivatives of the formula I ##STR1## are herein described wherein R.sup.1 represents an unsubstituted or substituted aromatic or heteroaromatic ring;R.sup.2 is hydrogen, a straight-chained or branched alkyl, alkoxyalkyl, or a substituted or unsubstituted aminoalkyl group with up to ten carbon atoms;R.sup.3 is hydrogen, a straight-chained or branched alkyl group, or an alkoxycarbonyl radical with up to four carbon atoms;R.sup.4 is hydrogen, or a morpholinoethyl group;R.sup.5 is a straight-chained or branched alkyl group with up to four carbon atoms, or an amino group; andR.sup.6 is a carboxyl group, or an alkyl- or alkyloxyalkyl carbonyl radical, containing up to 12 carbon atoms and optionally interrupted by an oxygen, sulphur, or nitrogen atom;as well as optionally the pharmacologically acceptable salts thereof; processes for the preparation of these derivatives and their use in the control of vascular diseases.

Abstract: The invention is directed to a motor-driven chain saw wherein a sprocket for a saw chain and a drive wheel for an oil pump are rotatably journalled on the crankshaft. The oil pump pumps oil for lubricating the saw chain and guide bar. The sprocket and the drive wheel are driven via a clutch drum. In this arrangement, a detachable resilient connecting member is provided to connect the drive wheel of the oil pump to the clutch drum at the peripheral wall of the latter. The resilient connecting member protects the drive wheel and the oil pump from excessive wear.

Abstract: The invention is directed to an air-intake arrangement for a two-stroke engine for use in hand-guided, engine-driven apparatus such as motor-driven chain saws. The air-intake arrangement includes an air filter and a baffle wall for guiding fuel particles that are buffeted back out of the air induction channel by the engine. The baffle wall has a curvature to define a deflector to redirect the fuel particles in a largely gaseous state towards the carburetor. The arrangement provides an optimum air-fuel mixture which is not overrich and a trouble-free operation of the engine.

Abstract: 2-Alkylthio-1-aminoalkyl-2-pyrroline-3-carbonitriles and pharmaceutically acceptable acid addition salts, processes for their preparation and formulation into pharmaceutical compositions as well as their activity as thrombocyte aggregation-inhibitors are described. The compounds are thus useful for the prophylaxis and therapy of thrombotic states.

Abstract: A portable motor chain saw with a safety braking device to protect against kick-back, recoil or centrifugal movements of the saw. The saw includes a handle supported against the motor housing by damping elements, and also includes a locking device which on the one hand is connected with the handle, and on the other hand engages against a hand guard in such a way that it is released under the influence of relative movement, of the motor housing with respect to the handle, caused by a kick-back or centrifugal movement, consequently releasing the hand guard. The locking device has an abutment surface extending transverse to the direction of centrifugal movement, and this abutment surface cooperates with a projection directed against it.

Abstract: A process for the continuous preparation of organic solutions of percarboxylic acids by reaction of an aqueous solution of hydrogen peroxide with the corresponding carboxylic acid in the presence of an acid, water-soluble catalyst which boils above 160.degree. C., extraction of the percarboxylic acid from the resulting reaction mixture using an organic solvent which is immiscible with water, reconcentration of the raffinate, which essentially contains hydrogen peroxide and the acid catalyst, by distilling off water in a distillation column and recycle of the raffinate, concentrated in this way, into the reaction with the carboxylic acid. The raffinate is divided into two partial streams in a ratio of 1 to 25:1.