Abstract: A prosthetic heart valve includes a collapsible and expandable stent and a plurality of commissure features disposed on the stent. A collapsible and expandable valve assembly includes a plurality of leaflets connected to the plurality of commissure features, each commissure feature including a body having a proximal end and a distal end. A plurality of eyelets is arranged in rows and columns on the body for distributing load from the plurality of leaflets.

Abstract: A delivery device for a collapsible heart valve includes an operating handle and a catheter assembly. The operating handle includes a frame defining a movement space therein, a carriage assembly moveable in a longitudinal direction within the movement space, and a coupler having locked and unlocked conditions, the coupler being operatively connected to the carriage assembly for movement therewith. The catheter assembly includes a shaft around which a valve-receiving compartment is defined, the shaft being operatively connected to one of the frame or the carriage assembly, and a distal sheath operatively connected to the carriage assembly for movement therewith between a closed condition adapted to maintain the valve in the compartment and an open condition adapted to fully deploy the valve.

Abstract: A process of producing a ceramic matrix composite gas turbine component and a ceramic matrix composite gas turbine component are provided. The process includes modifying a surface of the ceramic matrix composite gas turbine component to produce a modified surface with a surface roughness of less than 6 micrometers. The modifying is selected from the group of techniques consisting of applying unreinforced matrix plies to the surface, vapor depositing silicon on the surface, honing the surface, applying braze paste to the surface, and combinations thereof. The component includes a modified surface including a surface roughness of less than 6 micrometers. The modified surface being selected from the group consisting of unreinforced matrix plies applied to a surface of the ceramic matrix composite gas turbine component, silicon vapor deposited on the surface, a honed surface, a braze paste applied to the surface, and combinations thereof.

Abstract: Components are disclosed which include a CMC substrate having a first surface and a second surface. The first surface is in fluid communication with a compressed, dry fluid, and the second surface is in fluid communication with a wet fluid stream and includes a hermetic coating. The components further include at least one opening extending from the first surface through a portion of the CMC substrate, wherein, upon removal of a fragment of one or both of the hermetic coating and the CMC substrate, the at least one opening selectively permits a flow of the compressed, dry fluid to the second surface. In one embodiment, the component is a gas turbine component, the wet fluid stream is a hot combustion stream, the hermetic coating is an environmental barrier coating, and the flow reduces or eliminates volatilization of the CMC substrate. Methods for forming the components are also disclosed.

Abstract: A prosthetic heart valve 300 may include a collapsible and expandable stent 306 having a proximal end 302, a distal end 304, an annulus section adjacent the proximal end, and a plurality of cells connected to one another in annular rows around the stent, a cuff 312 attached to the stent, and a sealing member 322 attached to the cuff and extending from a proximal end 313 of the cuff to a free edge 323. The sealing member 322 may be movable between an extended condition in which the free edge 323 is located proximally of the proximal end 302 of the stent 306, and an inverted condition in which the free edge is located distally of the proximal end of the stent and a first surface 324 of the sealing member confronts an outward-facing surface of the cuff. Various mechanisms for moving the sealing member 322 are also described.

Abstract: A prosthetic heart valve includes a collapsible and expandable stent and a plurality of commissure features disposed on the stent. A collapsible and expandable valve assembly includes a plurality of leaflets connected to the plurality of commissure features, each commissure feature including a body having a proximal end and a distal end. A plurality of eyelets is arranged in rows and columns on the body for distributing load from the plurality of leaflets.

Abstract: A mold assembly for use in forming a component having a first internal passage defined therein includes a mold that defines a mold cavity therein. The mold assembly also includes a lattice structure selectively positioned at least partially within the mold cavity and formed from a first material. The first material is at least partially absorbable by a component material in a molten state. The mold assembly further includes a first segmented core that includes at least one joint segment coupled to the lattice structure. The at least one joint segment is coupled in serial flow communication to at least one extension segment such that a first hollow structure is defined. A first inner core is disposed within the first hollow structure such that at least a portion of the first inner core defines the first internal passage when the component is formed in the mold assembly.

Abstract: A process of producing a ceramic matrix composite component. The process includes positioning a plurality of ceramic matrix composite plies on top of one another and forming a cavity therein. At least a portion of the cavity includes a terminal diameter sufficiently small to permit infiltration of a densifying material. The plurality of ceramic matrix composite plies are densified to form a densified body. The densifying results in the portion of the cavity including the terminal diameter being filled with densifying material and the cavity is present in the densified body. A ceramic matrix composite having cavities therein is also disclosed.

Abstract: A process of producing a ceramic matrix composite component. The process includes positioning core plies on a mandrel. At least partially rigidizing the core plies to form a preform ceramic matrix composite arrangement defining a tip cavity and a hollow region. Ceramic matrix composite tip plies are positioned on the preform ceramic matrix composite arrangement and within the tip cavity. The ceramic matrix composite tip plies are densified to form a tip region of the composite component.

Abstract: A process of producing a hot gas path turbine component. The process includes forming a void in a first ceramic matrix composite ply and forming a void in a second ceramic matrix composite ply. The second ceramic matrix composite ply is positioned on the first ceramic matrix composite ply such that the positioning aligns the voids to at least partially define a cavity in the component. A third ceramic matrix composite ply is positioned on the first ceramic matrix composite ply and the first ceramic matrix composite ply, the second ceramic matrix composite ply and the third ceramic matrix composite ply are densified to form a densified body. The cavity is present in the densified body. A ceramic matrix composite having cavities therein is also disclosed.

Abstract: A delivery device for a collapsible heart valve includes an operating handle and a catheter assembly. The operating handle includes a frame defining a movement space therein, a carriage assembly moveable in a longitudinal direction within the movement space, and a coupler having locked and unlocked conditions, the coupler being operatively connected to the carriage assembly for movement therewith. The catheter assembly includes a shaft around which a valve-receiving compartment is defined, the shaft being operatively connected to one of the frame or the carriage assembly, and a distal sheath operatively connected to the carriage assembly for movement therewith between a closed condition adapted to maintain the valve in the compartment and an open condition adapted to fully deploy the valve.

Abstract: The present application provide a seal for use between components engine facing a high pressure cooling air flow and a hot gas path in a gas turbine. The seal may include a first shim, a second shim with an air exit hole, one or more middle layers positioned between the first shim and the second shim, and one or more cooling pathways extending through the middle layers for the high pressure cooling air flow to pass therethrough and exit via the air exit hole into the hot gas path.

Abstract: A method for manufacturing a ply is disclosed. The method includes printing the ply, the ply including a near net shape and a ceramic matrix composite nonwoven material. A ply is disclosed wherein the near net shape is a predetermined layer of an article. A method for manufacturing an article is also disclosed. The method includes printing a first ply and a second ply. The first ply includes a first near net shape and a first ceramic matrix composite nonwoven material, and the second ply includes a second near net shape and a second ceramic matrix composite nonwoven material. The method further includes applying the second ply to the first ply, and consolidating the first ply and the second ply.

Abstract: A delivery device 10 for a collapsible prosthetic heart valve includes a catheter assembly 16 including a shaft 26 around which a compartment 23 is defined, the compartment 23 being adapted to receive the valve in an assembled condition, and a retainer 30 including a pusher 32 and a holder 34 adapted to retain a stent portion 106 of the valve. The catheter assembly 16 also includes a distal sheath 24 adapted to selectively cover and uncover the compartment 23 and the valve, the distal sheath 24 extending around the shaft 26 at least when the distal sheath 24 covers the compartment 23. The pusher 32 includes one or more recesses 40 in a retention edge 33 thereof, each recess 40 being adapted to receive a junction 107 at an end of the stent portion 106 of the valve. The holder 34 includes one or more elongated ribs 50, each rib 50 being adapted to fit into a cell opening 108 of the stent portion 106 of the valve.

Abstract: The present application provide a seal for use between components engine facing a high pressure cooling air flow and a hot gas path in a gas turbine. The seal may include a first shim, a second shim with an air exit hole, one or more middle layers positioned between the first shim and the second shim, and one or more cooling pathways extending through the middle layers for the high pressure cooling air flow to pass therethrough and exit via the air exit hole into the hot gas path.

Abstract: A prosthetic heart valve includes a collapsible and expandable stent and a plurality of commissure features disposed on the stent. A collapsible and expandable valve assembly includes a plurality of leaflets connected to the plurality of commissure features, each commissure feature including a body having a proximal end and a distal end. A plurality of eyelets is arranged in rows and columns on the body for distributing load from the plurality of leaflets.

Abstract: This disclosure describes an animal feed nutritional supplement composition, methods of making the composition, and methods of using the composition. Generally, the animal feed nutritional supplement includes a core material at least partially coated with free fatty acid. Typically, the animal feed supplement composition melts when heated.

Abstract: A delivery device 10 for a collapsible prosthetic heart valve includes a catheter assembly 16 including a shaft 26 around which a compartment 23 is defined, the compartment 23 being adapted to receive the valve in an assembled condition, and a retainer 30 including a pusher 32 and a holder 34 adapted to retain a stent portion 106 of the valve. The catheter assembly 16 also includes a distal sheath 24 adapted to selectively cover and uncover the compartment 23 and the valve, the distal sheath 24 extending around the shaft 26 at least when the distal sheath 24 covers the compartment 23. The pusher 32 includes one or more recesses 40 in a retention edge 33 thereof, each recess 40 being adapted to receive a junction 107 at an end of the stent portion 106 of the valve. The holder 34 includes one or more elongated ribs 50, each rib 50 being adapted to fit into a cell opening 108 of the stent portion 106 of the valve.

Abstract: Components are disclosed which include a CMC substrate having a first surface and a second surface. The first surface is in fluid communication with a compressed, dry fluid, and the second surface is in fluid communication with a wet fluid stream and includes a hermetic coating. The components further include at least one opening extending from the first surface through a portion of the CMC substrate, wherein, upon removal of a fragment of one or both of the hermetic coating and the CMC substrate, the at least one opening selectively permits a flow of the compressed, dry fluid to the second surface. In one embodiment, the component is a gas turbine component, the wet fluid stream is a hot combustion stream, the hermetic coating is an environmental barrier coating, and the flow reduces or eliminates volatilization of the CMC substrate. Methods for forming the components are also disclosed.

Abstract: Disclosed herein is a method comprising dispersing one-dimensional objects in a liquid to form a mixture; and disposing the mixture on a substrate that has channels disposed on it; where the channels are of a width of 4 to 90 percent of the length of the one-dimensional object. Disclosed herein is an article comprising a substrate; where the substrate has channels disposed thereon; each channel being bounded by a wall; and a plurality of one-dimensional objects that are oriented relative to the walls on the substrate; and where the channels are of a width of 4 to 90 percent of the smallest length of the plurality of one-dimensional objects.