49 results about "Longitudinal development" patented technology

The embodiment of the invention discloses a longitudinally superposed developing two-strata oil reservoir well pattern, and an arrangement method of the two-strata oil reservoir well pattern. The method comprises the following steps: firstly determining the longitudinal development strata of the oil reservoir and the rational well distance, and determining the well spacing of a basic well pattern and the well spacing of a middle transitional well pattern according to the longitudinal development layer coefficient. According to the longitudinally superposed developing two-strata oil reservoir, the well spacing of the basic well pattern is 2L, after being encrypted once, the well spacing of a middle transitional well pattern is square root of 2 times L; after being encrypted twice, two superposed well patterns with a well spacing of square root of 2 times L are formed; the well spacing of the superposed well pattern after alternative strata development is L; the evolution process of the well spacing is as follows: 2L to 2 times square root of 2 L to L; the conversion middle process of a well pattern with a well spacing of square root of 2 times L; in the same drilling speed, well placement uniformity coefficient and reserve control speed are increased; the well spacing is encrypted in the alternation of well patterns; each well pattern can realize order development to each strata; the utilization ratio of the well patterns is improved; and meanwhile, the oil reservoir is uniformly used, so that the method is in favor of increasing accumulated oil production of an oil field and improving the recovery ratio; and interlayer interference generated by extracting oil in multiple oil layers of longitudinal series of strata is avoided.

A track (10) for track- type vehicles is described, comprising a continuous sequence of articulated joints (12, 12') of the hinge type, oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10). The articulated joints (12, 12'), provided with pins (36, 36'), are connected to each other and maintained at a constant distance through pairs of links (14) having longitudinal development, arranged laterally and symmetrically with respect to the longitudinal central axis (B-B). Around each pin (36, 36') a bushing (40) is mounted free to rotate with respect to the pin (36, 36') itself and at least one sliding bearing (44) is press-fitted between each pin (36, 36') and the links (14). The presence of sliding bearings (44) made in composite material and having a small thickness and the geometrical/ size characteristics of the links (14) and of the sliding bearings (44) themselves makes it possible to improve the stability and the fatigue and wearing resistance of the articulated joints (12, 12') of the track (10).

A track (10) for track-type vehicles is described, comprising a continuous sequence of articulated joints (12, 12') of the hinge type, oriented according to a first axis (A-A) substantially perpendicular to the central longitudinal development axis (B-B) of the track (10). The articulated joints (12, 12'), provided with pins (36, 36'), are connected to each other and maintained at a constant distance through pairs of links (14) having longitudinal development, arranged laterally and symmetrically with respect to the longitudinal central axis (B-B). Around each pin (36, 36') a bushing (40) is mounted free to rotate with respect to the pin (36, 36') itself and between each pin (36, 36') and the links (14) at least one sliding bearing (44) is press-fitted. The geometric/size characteristics of the links (14) and of the sliding bearings (44) make it possible to improve the stability and the resistance to fatigue and wearing of the articulated joints (12, 12') of the track (10).

A connection assembly for coupling an auxiliary drive system to a wheelchair for disabled people, of the type comprising a fixing structure adapted to be fixed to the framework of the wheelchair and a longitudinal member operatively connected to the fixing structure so that the longitudinal development axis of the longitudinal member is substantially parallel to the advancement direction of the wheelchair. The connection assembly comprises connection means associated with the free end of the longitudinal member and with the auxiliary drive system, such connection means are configured to allow rapid coupling and decoupling of the auxiliary drive system to/from the wheelchair.

The invention relates to a cogged belt for conveying articles and/or for power transmission, and a method and an apparatus for realisation thereof. The cogged belt (30, 50) comprises: a prefabricated belt (8) comprising a textile or a meshed net; and a covering (26) made of a thermoplastic or heat-hardening material fixed in a single body by fusion to the prefabricated belt (8) and substantially entirely covering a side of the prefabricated belt (8), the covering (26) forming a cogged profile (43). The cogged belt (30, 50) can further comprise at least a cord-shaped reinforcing core (61) at least partially incorporated in the covering (26). The method includes use of a mould (10) which is: mobile, exhibits a longitudinal development and comprises a succession of spaces (11, 11A, 11B) for containment of molten thermoplastic or heat-hardening material, the method comprising stages of: supplying a prefabricated belt (8) which faces the spaces (11, 11A, 11B) and advances at a same velocity as the mobile mould (10), and supplies molten thermoplastic or heat-hardening material into the spaces (11, 11A, 11B) in order to enable formation of a single body (30, 50). An additional stage of the method further includes supplying at least a reinforcing core (61) to be incorporated in the single body (30, 50). The apparatus comprises: a cogged pulley (2) activated by actuator organs; two lateral sides (3, 4) fixed to heads of the pulley (2); a contrast belt (5) facing a circular sector of the pulley (2); a supply device (6) of molten thermoplastic or heat-hardening material; a first station (7) for supplying a prefabricated belt (8), and an additional second station (60) for supplying at least a reinforcing core (61).

Method for dimensioning a quadrilateral or McPherson suspension (S) with cross leaf spring (LS) defining a longitudinal development (Y), arranged parallel to a symmetrical vehicle axle defined by the suspension (S), having an intermediate point of reference (M), an end point (L/2) connected to a lower arm (AL) of the suspension and a constraint point (1/2), intermediate between the first two, constrained to a fixed part (C), said method comprising a step of defining the following distances measured along said longitudinal development (Y) starting from said intermediate point of reference (M) : - P = distance of the connection (X2) between lower arm (AL) and wheel hub (SP), - L/2 = distance from said end point (L/2) of the leaf spring (LS), - H = distance of the hinging between said first part of the lower arm and said fixed part (C), - 1/2 = distance of said intermediate constraint point (1/2); - a step of defining with d a difference/distance between H and L/2 and with b a difference/distance between H and P, - a step of defining R = b/ (b-d), - a step of defining ks = ksosp * R2 [eq.l], where ks is the stiffness of the leaf spring upon symmetrical vertical loads and ksosp is the stiffness of the suspension upon symmetrical vertical loads, - a step of defining a thickness h of said leaf spring (LS) according to the following equations: - h = hO between said reference intermediate point (M) and 1/2, - h(Y) = 2* ( (Y- (costi) ) / (cost2) )0-5 between 1/2 and L/2 [eq. 2 ], where Y is an independent variable, costi = 1015.00942 and cost2 = -8.51224 and wherein the material of said leaf spring has a Young module comprised between 195 GPa and 210 GPa.

Apparatus to actively control the vibrations of an articulated arm(11), for example for pumping concrete, consisting of a plurality of segments(15-20) pivoted to each other in correspondence to their own pivoting ends(23) and of drive actuators(24) each cooperating with two of said segments in order to extend and/or fold back the articulated arm. Each of the drive actuators(24) is connected to a drive circuit in order to act on a vertical plane substantially defined by the two segments of the articulated arm to which it is associated. Said apparatus also comprises at least one auxiliary actuator associated to at least one of said segments of the articulated arm in proximity to at least one of the pivoting ends(23), said auxiliary actuator being provided with at least two operative ends, each of said operative ends being connected to a corresponding support, said supports being provided on said segment distanced to each other along the longitudinal development of said corresponding segment and defining, on the segment(15-20), respective application zones, said auxiliary actuator(28) being selectively activable to induce, in said application zones, compensation forces acting on a damping plane which is different from said vertical plane.

A duct for electrical cables comprises a plurality of filiform elements arranged substantially parallel to one another according to the longitudinal development of the duct. The duct of the invention includes, for at least a portion of its length, a plurality of structural modules, which are arranged in a transverse direction with respect to said filiform elements and are set at a distance from one another in succession according to the longitudinal development of the duct. The supporting modules have a basically U-shaped body that includes a central wall from which there project, on opposites sides with respect to one another, two side walls that are set substantially parallel to one another. On said shaped body coupling means, designed to enable connection with said filiform elements, are arranged.

The invention concerns a filtering drum (1) for fibre suspensions in water, comprising a plurality of shaped bars (2; 11, 13) with mainly longitudinal development, arranged side by side in order to define a tubular structure having substantially circular cross section, with the inner lateral surface (4) covered by a plurality of slits (3) that create a filtering surface, two or more annular elements (15) coaxial with one another and spaced according to the longitudinal axis (X) defined by the tubular structure, coupled through contact outside the shaped bars (2; 11, 13), wherein the shaped bars (2; 11, 13) are arranged according to a helical pattern.

The invention relates to the nautical sector, and concerns in particular a catamaran boat (1) comprising: a first catamaran craft (1a) functioning independently, having a prevailing direction of longitudinal development along the median axis (x) and comprising a bow (2a), a stern (3a), motor means (4a) and directional means (5a); a second catamaran craft (1b) functioning independently, having a prevailing direction of longitudinal development along the median axis (x) and comprising a bow (2b), a stern (3b), motor means (4b) and directional means (5b), where said first catamaran craft (1a) and said second catamaran craft (1b) each comprise joining means for their mutual stable coupling, obtained matching the relative sterns (3a, 3b), on a transverse junction plane (pi), to carry out said catamaran boat (1) able to function as a single unit.

A femoral stem for hip prosthesis is disclosed comprising: a main body with a mainly longitudinal development and a generally wedge shaped, which is inserted into the femoral canal present in the body of the femur; a central body of a generally trapezoidal shape integral with the main body, located in the proximal zone of the femur; an appendix projecting from the central body provided with a terminal pin receiving spherical head of joint into the cotyle belonging to the prosthesis and inserted into the acetubular zone of the pelvic bone. The main body and the central body are defined by a shaped surface on one side and a mixtilinear surface on the opposite side from which a shaped notch is starting involving the central body and extending up to the proximity of the projecting appendix.

What is described is an air-gas mixer device for premix burner equipment of boilers, particularly of condensing boilers, comprising flow guide means for guiding an air-gas mixture to the intake section (2a) of a centrifugal fan (2) with an impeller (4) driven in rotation about a first axis (X), the guide means including a tubular Venturi effect conduit structure (6) with contiguous converging and diverging portions (6a, 6b) developed in an axially symmetric manner about a second axis (Y), a section being provided between the portions of conduit into which section the gas flow is delivered for mixing with the air flow supplied through the converging portion (6a) of the conduit. The conduit (6) is in communication with the intake section (2a) of the fan, downstream of the diverging portion (6b) with respect to the direction of the flow, and the impeller (4) of the fan is housed in a scroll manifold (5) including a housing (5a) for receiving the impeller (4) and a cover plate (5b) to close the housing (5a), a through aperture (7) being formed in the cover plate (5b) to put the Venturi effect conduit (6) into communication with the intake section (2a) of the fan. The axis of rotation (X) of the fan (2) does not coincide with the axis (Y) of longitudinal development of the Venturi effect conduit (6), the offset between the first and second axes (X, Y) being chosen so as to allow the mixer device to have a valve unit (3) mounted on it for supplying the gas flow into the Venturi effect conduit (6) with a configuration in which the projection of the overall dimensions of the Venturi effect conduit (6) and of the valve unit (3), in the direction of the axis of rotation (X), lies substantially and predominantly within the projection of the cover plate (5b) of the fan in the direction of the axis of rotation (X).

A composite wire for the manufacture of semifinished products to be subjected to an emptying process in the field of goldsmithery. The wire comprises a support core developing essentially along one of its longitudinal axes in a nonprecious metal that is removable by chemical or electrochemical means as well as a plurality of sections in precious metal having an essentially longitudinal development of which at least a portion of each one is radially engaged in the core.

An ornamental item with variable configuration, of the necklace or bracelet type, comprises an at least partially flexible elongated base element (2) made of precious or semi-precious, and it is characterized in that the elongated base element (2) has, on a first visible side, a slide and support guide (3). Moreover, one or more ornamental elements (4) are provided, able to be selectively inserted into said slide guide (3), as well as means (6) for locking each of the ornamental elements (4) in a predetermined position along the longitudinal development of said elongated base element (2).

A rotary seamer (1) comprises a seaming turret (2), a seaming station pivotally associated to the seaming turret (2) to set in rotation around its own axis (8) a container (6) to be seamed, a shaft (11) having a first end (13) hinged in the seaming turret (2), a seaming block (9) also called lever, defining a cavity (15) with longitudinal development, shaped complementarily relative to a second end (14) of the shaft (11) in such a way that it can be coupled thereto by inserting the shaft (11) into the cavity (15), and means (16) for anchoring transversely the seaming block (9) to the shaft (11), acting in a predetermined transverse direction (17) in such a way as to create at least one contact surface (20) between shaft (11) and cavity (15), said second end (14) of the shaft (11) and said cavity (15) being so shaped that said contact surface (20) has at least one oblique portion relative to the direction (17) in which said means (16) act. Currently, there are mainly two types of shaft ends for mounting the seaming block on the related shaft: the bevel one with disc shaped tongue and the grooved one. Both solution entail complicated mountings, with poor precision.

The invention discloses a method for polymerizing diethylene glycol and ethylene oxide. The method comprises the following steps: under the protection of inert gas and/or nitrogen, and in the presence of a quaternary ammonium base, diethylene glycol It can be polymerized with ethylene oxide at a molar ratio of 1:1 to 1:3. The method of the present invention has high reaction activity and good selectivity, the catalyst can be easily removed, the neutralization process is reduced, and the rectification substrate has a light color, which can be directly used to produce products such as polyethylene glycol and polyethylene glycol dimethyl ether ; The method of the present invention can not only improve the production capacity of triethylene glycol and/or tetraethylene glycol, but also can co-produce other polymerized glycols, such as pentaethylene glycol; through the process of the present invention, not only the vertical development of products can be realized , to create higher economic benefits, but also reduce investment in environmental protection and reduce the impact on the environment.