64results about How to "Reduce mechanical force" patented technology

The present invention concerns a system for utilizing radio frequency signals to dynamically determine the location of a medical device throughout a procedure and to improve navigation of the medical device. For these purposes, a plurality of RF receivers are mounted at operative locations in the operating room and operate on the same clock signal. The system also utilizes a diagnostic medical image such as an MRI, and overlays the position feedback signal on the image. This allows, for example, a surgeon to pick a desired spot on the diagnostic image, and then cause a robotic arm driven device to be moved to that particular spot inside the human body.

A magnet primarily for use in MRI applications comprises a pair of poles oriented about a plane of symmetry parallel to each therebetween defining an air gap region, magnetic field sources secured on the surfaces of the poles opposite the air gap that have yokes disposed on them, the yokes connected to each other by returns so that the entire magnet assembly can form a closed magnetic flux circuit to substantially confine the magnetic fields generated by the apparatus in the air gap where an imaging region is formed to place subjects for the purposes of examination. The main assembly being cylindrical in geometry has permanent magnets for magnetic field sources that are composed of two regions, a central disk-like portion magnetized substantially along the axial direction and an outer ring-like region magnetized substantially along the radial direction extending axially to form part of the pole together producing a very efficient and even flux distribution throughout the entire magnet assembly with minimal flux leakage. A further means of reducing flux leakage is incorporated in the yokes which have two sections, a disk-like region and an ring-like section to enclose the permanent magnets. The poles are made of multiple sections with a central disk-like region and an outer ring-like region that is a combination of permanent magnets and high permeability materials. This magnet assembly can achieve 1.0 Tesla or greater magnetic fields for whole-body scanning without saturating the magnet pole and other structures.

A magnetic resonance tomography apparatus, includes a gradient system that can generate at least one spatially varying and optionally time-varying magnetic field for at least one-dimensional local encoding of measuring signals in an area of a test sample to be imaged. The gradient system contains at least one subsystem which can generate a non-bijective spatially varying magnetic (NBSEM) field for local encoding, such that the function of the field strength of such an NBSEM within the area to be imaged has at least one local extreme value (maximum or minimum), such that the area to be imaged is divided along the hyper surface formed by the entirety of all local extreme values of the at least one NBSEM. The apparatus can produce images of the same quality with smaller magnetic field differences and permits easy realization.

The invention relates to an exhaust system (100) for channeling the streams from a by-pass gas turbine, the system comprising a stream channeling nozzle and an exhaust casing (110) for connecting the channeling nozzle to the outlet of the gas turbine, said channeling nozzle comprising a primary nozzle (120) fastened to the exhaust casing (110) and a secondary nozzle (130) placed around the primary nozzle. The exhaust system further comprises means for fastening the secondary nozzle (130) directly to the exhaust casing (110), said secondary nozzle being supported by the exhaust casing independently of the primary nozzle (120).

Provided is a stirred tank polymerization reactor system having a reactor tank, a stirring assembly including a rotatable shaft that extends through a wall of the tank, and a triple barrier mechanical seal. The mechanical seal includes an outer cylinder mounted in the wall of the tank, an inner cylinder that is rotatable relative to the outer cylinder and connected to the shaft, and first, second, and third fluid barrier seals mounted between the outer and inner cylinders at different positions along the axis of rotation of the inner cylinder. First and second sources of pressurized barrier fluid are connected between the first and second pressure fluid barrier seals and the second and third barrier seals, respectively. The three barrier seals advantageously “step down” the differential pressure experienced by the uppermost barrier seals, substantially reducing mechanical stresses experienced by the annular sealing rings and seats. The mechanical seal can further include a closed loop cooling channel in its outer cylinder that is connected to a circulating source of cooling fluid.

A fluid container is disclosed with a cap body made of rigid or semi rigid material and a valve body disposed within the cap body and movable between and open and closed position. The valve body is made of a semi flexible semi rigid material that has a coefficient of thermal linear expansion that is smaller than that of the cap body. The cap body and nozzle valve are configured with three different hermetic seals to counteract the effects of exposure to heat and cold over time and thereby extend the useful life of the cap and valve.

The present invention relates generally to polymeric waste processing. More particularly, the present invention relates to processing of polymeric waste which may be associated with elements such as non-polymeric material or metals. In a specific embodiment the method includes the steps of (1) loading preliminarily deformed waste into a reaction chamber, (2) applying an aggressive medium to the waste for a time sufficient to convert the one or more polymers to fragments, and separate one of more polymers from their associated elements, and (3) subjecting the products of step (2) to mechanical separation of the associated elements from the polymer fragments. The present invention is particularly useful for the processing of tyres including preliminarily deformed tyre segments or shredded tyre waste.

A wind energy system that converts fluctuating wind into electrical power, wherein part of the electrical power is converted into variable AC electrical power and fed into the grid, part is converted into DC power, and part is converted into heat.

The present invention relates to a door operator and a method for set up of a door operator (1) comprising a drive unit (7), a user interface (8) and a control unit (9), which control unit (9) controls the value of the current applied to the drive unit (7) such that the door operator (1) employs a first speed trajectory corresponding to the value of the current when opening and / or closing a door leaf (2) connected to the door operator (1), the method comprising the steps of: detecting a first or a second mode of set up of the control unit (9), and in the first mode, receiving a value of the time for opening and / or closing the door leaf (2) from the user interface (8), calculating a value of the current that should be applied to the drive unit (7) during acceleration and braking to obtain said value of the time for opening and / or closing the door leaf (2), and setting the calculated value of the current in the control unit (9), such that the door operator (1) employs the first speed trajectory when opening and / or closing a door leaf (2) connected to the door operator (1) corresponding to said set value of the time, in the second mode receiving a value of the current that should be applied to the drive unit (7) when opening and / or closing the door leaf (2) from the user interface (8), setting the value of the current in said control unit (9) that should be applied to the drive unit (7) during acceleration and braking such that the door operator (1) employs the first speed trajectory when opening and / or closing a door leaf (2) connected to the door operator (1) corresponding to said set value of the current.