Patent application number | Description | Published |
20120288373 | ROTOR WITH ASYMMETRIC BLADE SPACING - A turbine apparatus comprises a rotor with a hub section defined about a rotational axis and a plurality of blades attached to the hub section. The plurality of blades comprises a first group having a first angular spacing in a first circumferential sector of the rotor, and a second group having a second angular spacing in a second circumferential sector of the rotor. The first angular spacing is different from the second angular spacing, and the rotor blades are asymmetric about the rotational axis. | 11-15-2012 |
20130183135 | METHOD AND APPARATUS FOR TURBO-MACHINE NOISE SUPPRESSION - A turbo-machine inlet includes a gas passage having a non-gradual bend prior to an impeller assembly. The non-gradual bend causes a localized shockwave in fluid flowing through the gas passage. | 07-18-2013 |
20130236288 | BLEED NOISE REDUCTION - An assembly for reducing compressor noise includes a compressor and an acoustic shield. The compressor has a rotor with a plurality of blades mounted thereto. Additionally, the compressor has one or more bleed slots therein. The acoustic shield is disposed adjacent to the one more bleed slots and spaced at a distance therefrom. | 09-12-2013 |
20140112760 | REDUCTION OF EQUALLY SPACED TURBINE NOZZLE VANE EXCITATION - A reduction in excitation amplitudes affecting turbine blade durability in a turbine nozzle assembly having a plurality of vanes and turbine blades, includes: identifying a turbine blade design of the turbine nozzle assembly; performing a modal model analysis of at least one of the turbine blades in the turbine blade design; reducing aerodynamic impact by ensuring that each of the turbine blades is free of aero-excitation from an upstream flow at the vanes in an operating speed range; identifying blade natural frequencies with respect to the nozzle vanes; and modifying a trailing edge of at least one of the vanes to reduce the excitation amplitudes. | 04-24-2014 |
20140369804 | VARIABLE BLEED SLOT IN CENTRIFUGAL IMPELLER - The present disclosure relates to shroud bleed in centrifugal compressors. An air-limiting component 130 may be located adjacent to a shroud 120. The shroud 120 may have a primary bleed slot 210, and the air-limiting component 130 may have a secondary bleed slot 310. The primary bleed slot 210 and the secondary bleed slot 310 may overlap at an effective bleed slot location. The air-limiting component 130 may rotate relative to the shroud 120, which may change a streamwise location of the effective bleed slot. | 12-18-2014 |
Patent application number | Description | Published |
20090043152 | DELIVERY DEVICE FOR CARDIAC HARNESS - A delivery system for providing and deploying a cardiac harness over a heart. The delivery system includes an introducer tube having a plurality of distal fingers biased into a compressed delivery diameter. A dilator tube is slidably mounted within the introducer tube for dilating the fingers into an expanded diameter for deploying a suction cup into secure attachment with the heart. The suction cup is used to manipulate the heart as the cardiac harness is also deployed from the dilator tube over the suction cup, and over the heart. The suction cup is shaped to securely attach to the apex of the heart in one embodiment. | 02-12-2009 |
20090156892 | CARDIAC HARNESS - A cardiac harness for treating or preventing congestive heart failure is configured to be placed about at least a portion of a patient's heart so as to apply a mild compressive force on the heart. In one embodiment, the cardiac harness comprises a plurality of spaced apart conductive panels arranged so that there is no electrical continuity circumferentially around the harness. In an additional embodiment, a cardiac harness is provided that is insulated so as not to conduct electricity circumferentially about the harness. | 06-18-2009 |
20090281372 | CARDIAC HARNESS ASSEMBLY FOR TREATING CONGESTIVE HEART FAILURE AND FOR DEFIBRILLATION AND/OR PACING/SENSING - A cardiac harness assembly for treating congestive heart failure and for use in defibrillation and/or pacing/sensing is provided. The cardiac harness includes a number of longitudinal ribs spaced apart by connectors, the longitudinal ribs extending from the base to the apex of the heart. The longitudinal ribs have a high degree of longitudinal flexibility so that when the cardiac harness is mounted on the heart, the longitudinal ribs flex along the longitudinal axis of the ribs as the heart expands and contracts circumferentially. The cardiac harness provides a uniform and continuous compressive force on the heart throughout the cardiac cycle. | 11-12-2009 |
20100081867 | Medical Device Delivery System Having Integrated Introducer - An apparatus for delivering a medical device onto a heart includes a housing within which is releasably disposed the medical device. The housing in one embodiment comprises inner and outer deflectors between which is delivered the medical device. Both deflectors are self-expanding. A deflector compression sheath is slidable longitudinally over the housing to a delivery position at which it moves the deflectors to a collapsed configuration. The compression sheath is retracted to a deployment position to permit the deflectors to deploy by self-expanding to their larger diameters. The outer deflector has an expanded diameter sufficient to engage the inner surface of the pericardium to hold it away from the delivery site while the second deflector guides the medical device into position over the heart while protecting the heart. In another embodiment, the housing includes only an outer deflector. The apparatus also functions as an introducer when the compression sheath is moved to the delivery or “introducer” position at which configuration, the apparatus functions as an introducer. | 04-01-2010 |
20100152531 | IMPLANTABLE MEDICAL DEVICE FOR DRUG DELIVERY AND METHOD OF USE - An apparatus and method of preparing a cardiac harness for use in controllably delivering a medicament such as an mTOR inhibitor or aldosterone blockade from the surface of the cardiac harness to the epicardium of a patient's heart for the site-specific treatment of cardiac and non-cardiac maladies. The delivery of the medicament from the cardiac harness is achieved by: coating the medicament on the surface of the cardiac harness; coating the cardiac harness with a polymer material or dielectric material and impregnating the coating with the medicament; or by loading the medicament into an implant attached to the cardiac harness. | 06-17-2010 |
Patent application number | Description | Published |
20090142417 | PROCESS FOR THE PREPARATION OF CONCENTRATED SOLUTIONS OF STABILIZED HYPOBROMITES - The invention is a process for the preparation of stabilized aqueous solutions of alkali hypobromites at low temperatures, which comprises reacting a concentrated alkali hydroxide aqueous solution with bromine, and adding to the reaction product, which is a non-stabilized solution, an aqueous solution of a sulfamic compound, such as sodium sulfamate, thus forming a stabilized alkali hypobromite solution. | 06-04-2009 |
20090175962 | PROCESS FOR THE PREPARATION OF CONCENTRATED SOLUTIONS OF STABILIZED HYPOBROMITES - The invention provides stabilized concentrated aqueous solutions of alkali hypobromites, as well as a process for the preparation of said stabilized concentrated solutions at low temperatures, comprising reacting a concentrated alkali hydroxide aqueous solution with bromine, adding to the non-stabilized reaction product an aqueous solution of a sulfamic compound to stabilize the hypobromite, and oxidizing bromide to produce additional hypobromite. | 07-09-2009 |
20110183005 | PROCESS FOR THE PREPARATION OF CONCENTRATED SOLUTIONS OF STABILIZED HYPOBROMITES - The invention provides stabilized concentrated aqueous solutions of alkali hypobromites, as well as a process for the preparation of said stabilized concentrated solutions at low temperatures, comprising reacting a concentrated alkali hydroxide aqueous solution with bromine, adding to the non-stabilized reaction product an aqueous solution of a sulfamic compound to stabilize the hypobromite, and oxidizing bromide to produce additional hypobromite. | 07-28-2011 |