107results about How to "Constant cross section" patented technology

A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body.

A rotor blade damper is provided that includes a body having a base, a tip, a first contact surface, a second contact surface, a trailing edge surface, and a leading edge surface. The trailing edge and the leading edge surfaces extend between the contact surfaces. The first contact surface, second contact surface, trailing edge surface, and leading edge surface all extend lengthwise between the base and the tip. The body includes at least one cooling aperture disposed adjacent the base, that has a diameter that is approximately equal to or greater than the width of the trailing edge surface adjacent the tip. The body tapers between the base and the tip such that a first widthwise cross-sectional area adjacent the base is greater than a second widthwise cross-sectional area adjacent the tip.

A left atrial appendage occlusion device including an occluder disk configured to substantially prevent blood from at least one of entering and exiting the left atrial appendage, a middle portion including a coiled element and a first anchoring element. The coiled element connects to the occluder disk, has a substantially constant cross section and allows for variable length, variable orientation, and / or varied angles. The first anchoring element connects to the coiled element and includes scalloped edges that are configured to anchor the occlusion device to inner walls of the left atrial appendage and reduce the risk of one of penetration and perforation of walls of the left atrial appendage. The left atrial appendage occlusion device may also include a self-centering element that connects to the occluder disk and middle portion and is configured to center the occlusion device within the orifice of the left atrial appendage.

A cassette having an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. A flow channel is molded into the rigid substrate that corresponds to a flow channel molded into the elastomeric sheet. The cassette is used in combination with a peristaltic pump having pump head rollers that are mounted radially from the axis of rotation of the pump motor so as to compress the elastomeric flow channels against the rigid substrate during operation. The flow channels molded into the rigid substrate have smooth, fluid lines free from sharp edges and abrupt direction changes and correspond with the fluid channels molded into the elastomeric sheet so as to provide a transition region with a relatively constant cross-section over its entire length that approximates the cross-sectional area of the flow channels molded into the rigid substrate and the fluid channel molded into the elastomeric sheet so that the entire fluid path is of relatively constant cross-sectional area.

The invention relates to an arrangement for cooling a component in a vehicle with a device for providing cool air, with at least one air supply device for feeding the cool air into a passenger compartment of the vehicle, and with a first air-guiding element which branches off from the air supply device before it reaches the passenger compartment, conducts part of the cool air away from the air supply device and guides it to the component to be cooled. According to the invention, an air suction device conducts air away from the component.

A cleaning system for a gas turbine inlet filter mounted to a tubesheet. The filter defines an upstream side at which particulates are separated from a fluid stream passing through the filter and a downstream side substantially free of the particulates. The cleaning system includes a blowpipe for supplying a pressurized fluid. A one-piece nozzle is made from a tubular member having a substantially constant cross-section extending along the length of the member. The nozzle is permanently attached to the blowpipe at a first end portion. The nozzle is in fluid communication with the blowpipe to direct a cleaning pulse of the pressurized fluid from a second opposite end portion into the downstream side of the filter to dislodge particulates into the upstream side. An aspirator is formed in the nozzle at an upstream location spaced from the second end portion of the nozzle. The aspirator enables an additional volume of fluid to be delivered from the second end portion of the nozzle than is delivered from the blowpipe to the first end portion of the nozzle. A diffuser is fixed to at least one of the blowpipe and the nozzle. The diffuser directs a portion of the cleaning pulse to a proximal portion of the filter located adjacent to the tubesheet.

The invention relates to a liquid-cooled piston (10) for internal combustion engines having a cooling duct (16) that has an annular shape or consists of several annular segments, said duct having a substantially constant cross section along its extension and extending in an undulated manner at least in certain areas in the direction of the axis of the piston (18).

A stator for an electrical machine includes a ring-shaped stator yoke with a number of stator coils arranged thereon. The conductor ends of the coils are designed to be connected to a wiring arrangement, where the wiring arrangement has linking conductors, which are arranged concentrically to each other, are insulated electrically against each other, and have terminal elements to form electrical contact areas by which they are connected to the ends of the stator coils. The ends of the coils be connected to the linking conductors by separate terminal elements which have a first contact area for establishing a connection with the linking conductor and a second contact area for establishing a connection with at least one coil end.

The present invention efficiently and cost-effectively extracts and collects cells from a tissue. The inventors have discovered that the tissue can be effectively fragmented and the resulting cells can be purified using a system or kit with multiple components. An advantage of the present invention is that tissue processing takes place in a closed system such that sterility can be maintained throughout the process, even if certain components are removed during processing, for example through the use of valves, clamps, and heat seals. Furthermore, any or all of the steps can be automated or manually accomplished, according to the specific needs of the application or the user.