35results about How to "Compact geometry" patented technology

The present invention provides a dielectric resonator antenna comprising: a dielectric resonator; a ground plane, operatively coupled with the dielectric resonator, the ground plane having four slots; and a substrate, operatively coupled to the ground plane, having a feeding network consisting of four microstrip lines; wherein the four slots are constructed and geometrically arranged to ensure proper circular polarization and coupling to the dielectric resonator; and wherein the antenna feeding network combines the four microstrip lines with a 90 degree phase difference to generate circular polarization over a wide frequency band.

An electro-optical modulator with two electrodes as part of a transmission line of a first phase modulator and two electrodes as part of a transmission line of a second phase modulator included in two arms of a Mach-Zehnder-interferometer. An electrical controller applies a first electrical high-frequency-modulated voltage signals between the first and second electrodes and applies a second electrical high-frequency-modulated signals between the fourth and third electrodes. The electrical controller applies signals such that voltages applied to the first and fourth electrodes have substantially a same high-frequency content, and voltages applied to the second and third electrodes have substantially the same high-frequency content. In such configuration, a constant voltage offset is produced by either the voltages applied to the first and fourth electrodes or, the second and third electrodes. Thereby, cross-talk between electrodes, electrical losses, device size and fabrication costs may be reduced.

The invention provides a centrifugal compressor having variable geometry diffuser and a method thereof. The centrifugal compressor (1) comprises a plurality of diffuser vanes (5) arranged in a circumferentially spaced array about a machine axis (9). Each diffuser vane (5) is mounted on a respective shaft (10). Each of the shafts (10) is coupled to a ring (8) that is rotatable about the machine axis (9). A worm drive (11,12) is provided that comprises a worm (11) that meshes with a worm gear (12) or a segment of a worm gear (12) mounted along at least a portion of the circumference of the ring (8). A step motor (14) is coupled to the worm (11. The step motor (14) is operable to rotate the worm (11) about a worm axis (13) perpendicular to the machine axis (9), such that the worm drive (11,12) transmits rotational torque from the step motor (14) to said ring (8), to resultantly vary the position of the diffuser vanes (5).

A valve apparatus is comprised of a solenoid valve, a manual valve, a pressure relief device, a check valve, an excess flow shut-off device, and a temperature sensor. The temperature sensor is arranged inside the tank in an ambient atmosphere. The sealing member is prevented from falling off from the recess by a floating seal structure. The sealing effectiveness is improved by employing a double seal configuration and also by a smooth surface roughness. A high pressure seal structure is presented. The improved pressure relief device design for 75 MPa application has been presented.

A part made of transparent material comprising at least two individual portions each consisting of an input surface and an output surface, the output surface being focused on the input surface of the same portion, the output surfaces being contiguous so as to form an overall output surface of the part which is continuous. Furthermore, the input surfaces are separated at a distance from one another in order to prevent rays from a light source placed on the input surface of a portion from being able to pass through the output surface of the adjacent individual portion.

The invention relates to a device for heating a fluid, essentially comprising a heating body with a solid element and one or more electric resistors of rectangular section of the PTC type which are arranged in grooves on the exterior surface of the solid element. The latter comprises a U-shaped passage for fluid. The invention also relates to a vehicle engine fitted with such a device for preheating or heating the coolant. The invention also relates to a method for preheating or heating using such a device.

The present invention concerns a magnet-assisted ball drive. The drive comprises a ball and a drive element in contact with the ball. The drive element is arranged to be rotated around its axis of rotation to drive the ball. The ball and the drive element each comprise magnetic material such that at least one of the ball and the drive element comprises a magnet to generate a magnetic pulling force to pull the ball and the drive element against each other.

The invention relates to a module (100) for supplying gas to a motor vehicle engine (6), said module (100) comprising a single distributor (108), a gas cooler (107) and an air intake box (109) , the gas cooler is provided with means (120, 146) for fixing to the cylinder head of the engine (6), the air intake box (109) connects the single distributor (108) to the cooling device (107).

An actuating system for a drum brake of a vehicle, in particular of a commercial vehicle or an agricultural machine, comprising at least a brake lining carrier (2) which is guided on a brake bracket (4), an actuating element (6; 60) in order to move the brake lining carrier (2) towards the inner circumference of a brake drum (52), and a setting means (8) in order to control the actuating element (6; 60), wherein the actuating element (6; 60) is designed as a hollow body, in the cavity (10) of which an axle body (50; 150) is accommodated.

The invention discloses a design method for an impeller inlet of a supercritical carbon dioxide centrifugal compressor, and aims to provide a design method capable of restricting the condensation phenomenon at the impeller inlet, maintaining geometric compactness and high thermal cycle efficiency. It includes the following steps: the total temperature at the inlet of the impeller, the total pressure at the inlet of the impeller, the target flow function, the Mach number of the machine and the inlet angle of the pre-rotation are given; the total enthalpy of the inlet of the impeller is calculated; Accept the acceleration margin empirical coefficient and steam fraction value; calculate the maximum expansion Mach number, determine the acceptable expansion Mach number according to the obtained maximum expansion Mach number; determine the impeller inlet absolute Mach number according to the obtained acceptable expansion Mach number; according to the obtained impeller inlet absolute Mach number Calculate the static parameters of the impeller inlet under actual conditions; calculate the average isentropy index, calculate the relative axial airflow angle of the optimal impeller inlet cover, calculate the relative Mach number of the impeller inlet cover, and calculate the impeller inlet shape coefficient.

A water separation module (1) used in a fuel filter separation assembly (900) of a fuel circulation system of a vehicle, the assembly (900) includes an assembly housing (950) extending along a longitudinal axis (L-L), the assembly housing ( 950) can be positioned in a vehicle in a horizontal position and houses a filter module (500) for filtering dirty fuel. The water separation module (1) may be disposed within the assembly housing (950) and fluidly connected to the filtration module (500), extending along a major axis (X-X) parallel to and / or coincident with the longitudinal axis (L-L) . The water separation module (1) includes a separation device (2) and a blocking structure (3) arranged below the separation device (2) to prevent separated water from flowing back to the separation device (2). The blocking structure (3) comprises a blocking surface (31), at least a part of which is inclined with respect to the main axis (X-X) to allow the flow of water separated from the fuel oil to extend to the starting point of the blocking surface (31) location wall.

The invention relates to a novel method for achieving a uniform strong static magnetic field in free space. The conventional method is difficult to achieve a very strong static magnetic field in free space. The novel method takes a ring-shaped component in two-dimensional space as a static magnetic field intensifier, aeolotropic non-uniform magnetic material with negative permeability is filled in the ring-shaped component, and the inner and outer areas outside the ring-shaped component are full of air; a low-intensity static magnetic field with homogeneous background is applied in the whole environment, in which the ring-shaped component is positioned; and therefore, the uniform strong static magnetic field can be achieved in the inner area outside the ring-shaped component. The novel method can achieve 50T or higher intensity magnetic fields that cannot be achieved by adopting the prior art in large free space.