117results about How to "Simple and effective and inexpensive" patented technology

A turbomachine having two unducted external fans mounted to contrarotate about a common axis, the fans constituting respectively an upstream fan and a downstream fan, wherein at least some of the blades of the upstream fan carry air guide means on their radially outer end portions, the air guide means being outwardly oriented on going from upstream to downstream and serving to deflect the vortices that are formed in the vicinity of the blade tips of the upstream fan radially to outside the blades of the downstream fan.

A paving machine that moves in a travel direction and spreads, levels and finishes concrete into a form having a generally upwardly exposed, finished concrete surface that terminates in lateral sides. The paving machine has a main frame with first and second bolsters arranged at opposite ends of the main frame. Each set of bolsters has two hydraulic jacking columns used to raise and lower the machine frame. Crawlers attached to the bottom of the jacking columns engage the ground and move the paving machine in the travel direction. A pair of support beams is attached to the inner surface of each bolster and supported in passageways of a center module of the tractor frame. To extend the maximum width of the paving machine without having to extensively disassemble it, the free ends of the support beams extend beyond outer sides of the bolsters when the distance between the inner sides of the bolsters is at its minimum. This paving machine width adjustment can be performed in the field by moving the bolsters and the support beams attached to them inwardly or outwardly with the crawlers of the paving machine. Also provided is a laterally extendable / retractable cross beam for movably supporting a dowel bar inserter kit on the paving machine.

A method for detecting a displacement of a motor vehicle including a plurality of wheels each including a tire inflated by inflation gases, includes the steps of:periodically measuring (E1), at a standby frequency, the temperature of the inflation gases of the tire,comparing (E2) the values measured over a predetermined time interval for detecting movement of the vehicle,detecting (E3) a movement of the vehicle when the temperature of the inflation gases of the tire increases by at least a first predetermined temperature value during the predetermined time interval for detecting movement of the vehicle, andperiodically measuring (E4), at an activation frequency higher than the standby frequency, the temperature of the inflation gases of the tire when a movement of the vehicle has been detected.

Apparatus for rapidly vibrating tubes containing samples, e.g. biological samples, comprises a tube-support disk and concentric bearings for mounting the disk in a ring that is resiliently-suspended from a frame, the bearings comprising two rolling bearings mounted one within the other. The invention enables the tubes containing samples to be subjected to curvilinear reciprocating motion at high frequency.

A spacer device for spacing electrical harnesses in a turbomachine such as an airplane turboprop or turbojet is disclosed. The spacer device includes clips fastened on a support. A first clip is mounted on a harness via a retention device which prevents the spacer device from moving relative to the harness, and the spacer device includes a strip mounted around the first clip in order to close the first clip after a harness has been mounted in the first clip. The strip is fastened to the support in a non-releasable manner.

A device for fastening a fluid duct such as a fuel duct in an orifice of a turbojet casing, the device comprising a ring screwed into the orifice of the casing and having an annular rim coming to bear against a washer at the end of the duct, and a nut screwed onto the end of the duct so as to clamp the annular rim of the ring against the washer of the duct in order to fasten the duct to the casing.

A turbojet comprises at least a fan, a compressor, a combustion chamber, a turbine, and a rigid substantially-cylindrical jacket fastened at its upstream end to an intermediate casing and at its downstream end to an exhaust casing, the jacket serving to transmit forces between the intermediate casing and the exhaust casing.

A device for assembling together annular flanges by means of fastening bolts, in particular in a low-pressure turbine stage of the turbojet, one of the flanges has an element projecting from its face that faces the other flange and that is received in a notch in said other flange when the relative angular positioning of the two flanges is correct.

A turbomachine combustion chamber has primary and dilution air inlet orifices formed by die stamping to have edges that project into the inside of the combustion chamber, and stress relaxation and / or reduction means in the edges or in the vicinity of the edges of said orifices, said means comprising, for each orifice, one, two, or three slots formed in the edge or around a fraction of the edge of said orifice.

A diffuser-nozzle assembly mounted at the outlet from a centrifugal compressor is disclosed. The assembly includes a plurality of vanes carried by a radially inner wall forming a surface of revolution and surrounded by an outer casing, elastically deformable devices interposed between the radially outer ends of the vanes of the nozzle and the outer casing. The elastically deformable devices prevent air from passing between the outer casing and the radially outer ends of the vanes.

A turbomachine having two unducted external fans mounted to contrarotate about a common axis, the fans constituting respectively an upstream fan and a downstream fan, is disclosed. At least some of the blades of the upstream fan carry an air guide device on their radially outer end portions, the air guide device being outwardly oriented on going from upstream to downstream and serving to deflect the vortices that are formed in the vicinity of the blade tips of the upstream fan radially to outside the blades of the downstream fan.

A method and tooling for assembling a guide vane stage that includes an inner shroud and an outer shroud that are coaxial and interconnected by radial airfoils, the method including holding plates pressed against an outer surface of the inner shroud so that the plates cover gaps formed between openings in the inner shroud and the airfoils at least in part and in a manner that is leaktight, and applying a sealing resin to the inner surface of the inner shroud so that the resin fills the gaps and so that radially inner ends of the airfoils are embedded in the resin.