Patent application number | Description | Published |
20080251391 | METHODS AND SYSTEMS FOR APPLYING THERAPEUTIC AGENT TO A MEDICAL DEVICE - In methods and systems for applying a coating to a medical device, such as a coating comprising a therapeutic agent, electrons may be transferred from an electrode to ionize a therapeutic agent dissolved in an electrolytic solution. The ionized therapeutic agent may then be electrochemically delivered to the medical device. The medical device may be a stent, which may have a porous surface. | 10-16-2008 |
20080286326 | Medical devices having antifouling character - According to an aspect of the invention, medical devices are provided which include (a) a substrate and (b) a coating that includes an antifouling copolymer, an adhesive copolymer, or both. Antifouling copolymers for use in conjunction with the present invention contain (i) at least one antifouling polymer block having multiple pendant alkoxy functional groups along the polymer backbone and (ii) at least one additional polymer block. Adhesive copolymers for use in conjunction with the present invention contain (i) at least one adhesive polymer block having multiple pendant ring-hydroxyl-substituted aromatic groups along the polymer backbone and (ii) at least one additional polymer block. | 11-20-2008 |
20090018647 | ENDOPROSTHESIS COATING - An endoprosthesis, such as a stent, includes a chemical tie layer formed of polymer that enhance adherence of a coating, e.g. a drug eluting polymer coating, to a stent surface, e.g. made of ceramic. | 01-15-2009 |
20090171455 | BIODEGRADABLE POLYMERS - According to an aspect of the present invention, polymers that have a plurality of well defined polymer segments linked by disulfide linkages are provided. When these disulfide linkages are broken, multiple smaller polymers of lower molecular weight are produced. According to another aspect of the present invention, implantable or insertable medical devices are provided that contain polymers that have a plurality of well defined polymer segments linked by disulfide linkages. | 07-02-2009 |
Patent application number | Description | Published |
20150037183 | INTERMEDIATE OIL SEPARATOR FOR IMPROVED PERFORMANCE IN A SCROLL COMPRESSOR - An oil lubrication system for a multi-stage compressor separates oil from a refrigerant at an intermediate pressure following the first stage of compression and then routes the separated oil at the intermediate pressure to the compressor suction cavity bearings at the intermediate pressure, thus avoiding further compression of oil in subsequent stages of compression. The efficiency of the multi-stage compressor can be increased by not raising the pressure of the oil through the subsequent stages of compression. | 02-05-2015 |
20150037184 | DOUBLE-ENDED SCROLL COMPRESSOR LUBRICATION OF ONE ORBITING SCROLL BEARING VIA CRANKSHAFT OIL GALLERY FROM ANOTHER ORBITING SCROLL BEARING - A scroll compressor orbiting scroll bearing lubrication system includes a scroll compressor crankshaft having a lubricating fluid gallery extending therethrough between a first stage orbiting scroll and a second stage orbiting scroll. The first stage employs an orbiting scroll radial bearing and an orbiting scroll hydrodynamic thrust bearing, while the second stage employs an orbiting scroll radial bearing and an orbiting scroll hydrostatic thrust bearing. Lubricating fluid is supplied to the second stage orbiting scroll radial bearing via the lubricating fluid gallery. | 02-05-2015 |
20150037185 | ORBITING CRANKSHAFT DRIVE PIN AND ASSOCIATED DRIVE PIN SLEEVE GEOMETRY - A compressor crankshaft assembly includes a crankshaft and an eccentric drive pin extending from one end of the crankshaft. The shape of the drive pin viewed into the exposed end of the drive pin is defined by the intersection of a first cylinder that is coaxial with the axis of a substantially cylindrical orbital bearing journaled and installed to receive the eccentric drive pin and a second cylinder that is coaxial with the axis of a substantially cylindrical main bearing journaled and installed to rotatably receive the crankshaft, such that the area defined by the intersecting portion is less than the area defined by either cylinder. | 02-05-2015 |
20150037186 | STRUCTURE FOR STABILIZING AN ORBITING SCROLL IN A SCROLL COMPRESSOR - A scroll compressor includes one or more stage of compression disposed within a compressor housing. One or more of the stages includes a stationary scroll member including a base and a generally spiral wrap extending from the base of the stationary scroll member. One or more of the stages further includes an orbiting, scroll member including a substantially circular base and a substantially spiral wrap extending from the base of the orbiting scroll member. A coupling is disposed between the first scroll member base and the second scroll member base and in surrounding relationship to the first and second scroll member spiral wraps. At least one stabilizing pad is disposed between the first scroll member base and the second scroll member base and in axial thrust force relationship with the coupling to at least partially prevent tipping of the second scroll member. | 02-05-2015 |
20150037192 | SCROLL COMPRESSOR WITH PRESSURIZED OIL BALANCE PISTON - A scroll compressor includes an orbiting scroll member disposed within a compressor housing. The orbiting scroll member has a substantially circular baseplate and a generally spiral wrap extending from its base. A first seal is disposed proximal to the outer periphery of the orbiting scroll baseplate to provide an external seal between the baseplate and the housing. A second seal is disposed radially inward from the first seal to provide an internal seal between the baseplate and the housing. A space between the internal seal and the external seal defines a balance piston chamber. The balance piston chamber is pressurized via a high or intermediate pressure oil source to reduce thrust loading on the baseplate caused by an axial pressure differential across the baseplate. | 02-05-2015 |
20150043846 | THRUST BEARING FOR HVAC COMPRESSOR - Embodiments of a thrust bearing that may be used with a crankshaft of a HVAC compressor, particularly a HVAC compressor with a vertical or near-vertical placed crankshaft (e.g. a scroll compressor) are provided. The thrust bearing may generally include a bearing header and an insert. The insert may include an insert surface, which is configured to interact with a shaft surface of the crankshaft. The insert surface of the insert may include surface features that may help create flow behavior of the lubricant by a relative motion between the shaft surface of the crankshaft and the insert surface of the insert. The flow behavior of the lubricant may help separate the insert surface of the insert and the shaft surface of the crankshaft by the lubricant in operation to form the bearing, such as a hydrodynamic bearing. | 02-12-2015 |