Abstract:
A steering system for tracked vehicles having two brake circuits which is activated after a failure of the primary steering mechanism. The steering system includes a steering switch (L) that can be controlled by a steering axle which, in the event of primary steering system failure, acts upon the brakes of the vehicle in such a manner that rotation of the steering axle results in a braking action upon a track on the inside of a curve.
Abstract:
A steering system for tracked vehicles having two brake circuits which is activated after a failure of the primary steering mechanism. The steering system includes a steering switch (L) that can be controlled by a steering axle which, in the event of primary steering system failure, acts upon the brakes of the vehicle in such a manner that rotation of the steering axle results in a braking action upon a track on the inside of a curve.
Abstract:
A method facilitates vaporization of a fuel in a direct-injection four-stroke engine including at least one cylinder with a combustion chamber, at least one fluid intake with an intake pipe and a valve, at least one burnt gas exhaust with an exhaust pipe and a valve, a valve controller and fuel injector. The method includes, in the vicinity of the intake phase start, in opening the intake valve so as to allow the intake fluid into the combustion chamber, in opening exhaust valve so as to feed again into this chamber at least part of the burnt gas contained in exhaust pipe; prior to the end of the intake phase, in closing the exhaust valve; in the vicinity of the intake phase end, in closing the intake valve; and during this intake phase, in carrying out at least one fuel injection into the combustion chamber.
Abstract:
The present invention relates to a method of injecting fuel into the combustion chamber (16) of a cylinder of a direct-injection four-stroke internal-combustion engine, notably of diesel type, that can run according to a homogeneous combustion mode and according to a conventional combustion mode.According to the invention, this method consists, for the conventional combustion mode of the engine, in feeding into this chamber a first amount of fuel in the vicinity of the top dead centre of the piston at the beginning of the intake phase and another quantity of fuel in the vicinity of the top dead centre of this piston at the end of the compression phase.
Abstract:
A valve (30), a drill string valve assembly (10) and a method of drilling using compressed fluid as a drill drilling fluid are described. The valve and valve assembly (10) may be used in order to prevent escape of compressed fluid during the time that a connection is being made into the drill string. The valve (10) can be insertable into a drill string inner diameter to seal against fluid passage past the body except through the valve (30) and can be selected to maintain fluid pressure in the drill string when the upper end of the drill string is open to atmosphere. The valve can also be capable of being releasably engaged to a drive mechanism, such as a top drive (40) which is handling the drill string (12) to be slidably moved within the drill string, as driven by the drive mechanism, but releasable from the drive mechanism, when the drive mechanism is removed from the drill string.
Abstract:
Method for injecting fuel into the combustion chamber of a direct-injection internal-combustion engine, said chamber being delimited by the wall of a cylinder (10), a cylinder head (12) and a piston (22) comprising a bowl (26) inside which a teat (28) is arranged. According to the invention, the fuel is injected by means of an injection nozzle (24) allowing to obtain an engine injection sensitivity greater than or equal to 380 mm3/30 s and having a nappe angle (a1) less than or equal to 2 Arctg CD 2 F , where CD is the diameter of cylinder (10) and F the distance between the point of origin of the fuel jets and the position of the piston corresponding to a crankshaft angle of 50° in relation to the top dead center (TDC).
Abstract:
The present invention relates to a method of controlling the combustion by autoignition of a homogeneous fuel mixture for an internal-combustion engine comprising a combustion chamber in which a stage of slow oxidation of said mixture occurs prior to the combustion of this mixture. A determined amount of fuel is fed into the combustion chamber during the slow oxidation of the mixture so as to lengthen this oxidation stage.
Abstract:
Provided are distal aiming assemblies useful in aiming fixation members for insertion into an intramedullary device, such as a nail. The assemblies include a spring that flexibly connects an elongate arm to a base. The spring enables deflection of the elongate arm to compensate for curvature of the intramedullary device when inserted into a bone, in turn enabling the user to accurately install fixation members into the intramedullary device through the deflected elongate arm.
Abstract:
A surgical nail for treating a fractured bone includes a nail body extending along a longitudinal axis from a trailing end to a leading end and including a trailing end locking aperture extending transversely through a trailing end portion thereof and a leading end locking aperture extending transversely through a leading end portion thereof; a trailing end connecting element located at the trailing end of the nail body adapted and configured to be coupled to a trailing end aiming guide; and a leading end connecting element at the leading end of the nail body adapted and configured to be coupled to a leading end aiming guide.
Abstract:
A system for lining a junction between a main bore and an auxiliary bore includes a first tubing adapted to line at least a portion of the main bore. The first tubing has a lateral opening therein. A second tubing has a junction shield extending outward therefrom. The junction shield has a larger transverse dimension than the lateral opening and is adapted to contract to a smaller transverse dimension to pass through the lateral opening into the auxiliary bore.