Class 29/888.024 - Centrifugal type

Subclass of Class 29 - Metal working
Definition: Process wherein the manufactured article (1) accelerates
No. of patents: 34
Last issue date: 02/08/2011

Number	Title	Issue Date
7882632	Industrial pump and manufacturing method thereof In an industrial pump, a bearing provided in a pump main body rotatably supports both end sides of a rotating shaft to which an impeller is attached. A shaft seal apparatus is arranged in adjacent to the bearing. The shaft seal apparatus is cooled by a cooling water...	02/08/2011
7707720	Method for forming a corrosion-resistant impeller for a magnetic-drive centrifugal pump A method for forming an impeller for a pump provides a reliable protective barrier that prevents or eliminates the ingress of pumped fluid that might otherwise attack the magnetic assembly of the impeller. An inner barrier is hermetically connected to an internal im...	05/04/2010
7377746	Airfoil cooling circuits and method An airfoil is disclosed having at least first and second cast, axially-stacked internal airflow cooling circuits. Each circuit defines multiple air flow passages positioned laterally between a pressure sidewall side and a suction sidewall side of respective ones of ...	05/27/2008
7305762	Method for production of a rotor of a centrifugal compressor An improved method for production of a rotor (10) of a centrifugal compressor, wherein the rotor (10) is produced from a monolithic disc; this disc is worked in a radial direction by at least one tool (20) of a numerical control machine, such as...	12/11/2007
7278828	Repair method for plenum cover in a gas turbine engine A gas turbine engine plenum cover is repaired using a prefabricated repair cover SPAD. The SPAD repair cover has a spoolie boss that is aligned and attached to the body of the repair plenum cover prior to attachment to a plenum casting to form a repaired plenum cham...	10/09/2007
7108266	Fan cooled seal seat A seal assembly including a rotatable seal head subassembly also includes a fan that rotates with the seal head assembly, with the fan drawing air through a pump housing for purposes of cooling. ...	09/19/2006
6908281	Blower housing for furnace blower assembly A blower housing for a furnace blower assembly of the type including a blower motor coupled to an impeller for use in expelling exhaust gases from a furnace. The blower housing generally includes an inlet, an impeller cavity, and an extension portion extending from ...	06/21/2005
6884032	Water pump and method of closure A water pump having a housing with an opening defined by an axial inner retention surface and a radial outer surface. A plug formed of sheet metal includes a radial closure portion surrounded by a continuous axial flange adapted to be press fitted into the inner ret...	04/26/2005
6754954	Process for manufacturing forged titanium compressor wheel The difficulty of working with titanium has inhibited the adoption of titanium compressor wheels in automotive air boost devices. The invention provides an economical process for the manufacture of titanium compressor wheels. A hybrid process is disclosed, wherein a...	06/29/2004
6705833	Airflow flapper valve A blower apparatus includes a blower housing having at least one airflow channel. A flexible sheet having at least one flap is coupled to the blower housing such that the flap overlaps the channel to form a one-way valve. A plurality of flaps may be positioned over ...	03/16/2004
6508625	Cooling-water pump and method for its production The object is, by simple measures, to ensure a particularly smooth inner surface and maintain particularly high dimensional accuracy of a pump housing of a cooling-water pump for a power plant. For this purpose, the cast-concrete pump housing of the cooli...	01/21/2003
6206632	Bleed tube for centrifugal pump and method for retrofitting same An air bleed tube is attached to a single-stage centrifugal pump, which has an impeller and a liquid suction tube whose inlet is at a center of the impeller. The air bleed tube is attached with its air inlet at an exposed eye of the impeller to bleed air ...	03/27/2001
6050772	Method for designing a multiblade radial fan and a multiblade radial fan Specifications of the impeller and the scroll type casing of a multiblade radial fan comprising an impeller having numerous radially directed blades circumferentially spaced from each other and a scroll type casing accommodating the impeller are determine...	04/18/2000
5797181	Methods of manufacturing automotive fuel pumps with set clearance for the pumping chamber The turbine assembly of a fuel pump includes a pair of housings having an impeller disposed between the housings with a minimum clearance. In a first form, there is provided a spacer between the housings which can be crushed between a pair of press platen...	08/25/1998
5797731	Group of full-circumferential-flow pumps and method of manufacturing the same A group of full-circumferential-flow pumps has a group of motors each comprising a main shaft, a rotor mounted on the main shaft, a stator disposed around the rotor, a cylindrical outer motor frame fitted over the stator, and an outer cylinder disposed ar...	08/25/1998
5685699	Compressor transmission vent system An improved transmission vent system for centrifugal compressors comprises a motor compartment, a transmission chamber, an impeller for moving refrigerant in a downstream direction, a guide vane located upstream of the impeller, and a vent pipe connected ...	11/11/1997
5540192	Integrated water pump assembly for internal combustion engines A water pump assembly for an internal combustion engine includes an integrated bearing and seal unit consisting of a separate bearing and seal collar in combination with a single piece stamped steel housing. The bearing collar is machined to a standard be...	07/30/1996
5235744	Method of manufacturing a centrifugal pump casing A centrifugal pump casing of a centrifugal pump, includes a casing shell accommodating a rotary impeller therein and having as a basic circle an inner peripheral circle having a diameter greater than the diameter of the outer peripheral circle of the impe...	08/17/1993
5230616	Rotary compressor with shaft balancers A rotary compressor has an electric motor and a compressing mechanism drivingly connected together by a crank shaft and disposed in a closed housing. The compressing mechanism has a rolling piston rotatable in a cylinder bore and driven by an eccentric po...	07/27/1993
5176499	Photoetched cooling slots for diffusion bonded airfoils Cooling passages are accurately formed along the faying surfaces of a pair of diffusion bonded members such as a pair of half sections used to fabricate an airfoil. A particularly advantageous application of the invention is the photoetching of cooling ai...	01/05/1993
5173020	Collector silencer for a centrifugal compressor A centrifugal compressor is provided with a collector for receiving refrigerant from the diffuser, and sound absorbent segments are placed within the collector and retained in place against one wall thereof. One method of retention is by way of a ring and...	12/22/1992
5099566	Method of precompressing a silencer for a centrifugal compressor Sound absorptive fiberglass pads within a silencer device for a centrifugal compressor are precompressed while installing the device in a containing frame mounted in the discharge pipe by a process including the steps of establishing the transverse dimens...	03/31/1992
5049031	Quick removal appartaus and method for lantern rings and packing in pump assemblies The present invention provides a system for facilitating the removal of the lantern ring and packing in pump assemblies. Previously a steel hook was used to scrape away the worn packing. The present invention provides a series of cables extending through ...	09/17/1991
5040946	Case, particularly for centrifugal radial pumps, and method for manufacturing thereof A case (1) for single- or multi-stage pumps having at least one centrifugal radial impeller, and a method for the manufacture of such case with metal plate. The case includes, for each stage and for each impeller, a substantially cylindrical lateral wall ...	08/20/1991
4825521	Method of making an external shell of a pump wheel of a hydrodynamic flow unit An external shell of a pump wheel of a hydrodynamic flow unit manufactured from a sheet metal pressed part has, in its outlet-side region, an integral connecting sleeve with a cylindrical centering surface and a centered fastening surface extending theref...	05/02/1989
4817856	Method for coating a pump impeller A pump impeller is coated essentially without use of core structures. The pump impeller coating is performed in several stages. Partial units of the impeller are coated, whereafter the coated partial units are assembled together. Exposed areas of the impe...	04/04/1989
4785515	Method of making a centrifugal pump A centrifugal pump and method of making the same. The pump includes a casing having at least one impeller, an axial fluid inlet opening, and an outlet opening of a predetermined area. The impeller has a plurality of radially disposed impeller blades which...	11/22/1988
4782569	Method for manufacturing a rolling piston rotary compressor A method for manufacturing a rolling piston rotary compressor in which a cylinder block is adjusted during manufacture to provide a desired vane slot width. The cylinder block is provided with a thin walled section located radially out from the vane slot....	11/08/1988
4676717	Compressor housing having replaceable inlet throat and method for manufacturing compressor housing A compressor housing (30) is disclosed of the type characterized by having a centrally-disposed, concentric, flow restricting inlet throat in fluid communication with an encircling fluid conduit having a tangentially disposed outlet. Compressor housing (3...	06/30/1987
4536128	Barrel housing for centrifugal fluid machines The barrel housing of a multistage centrifugal pump has an elongated cylindrical main section and a discrete annular section which is inserted into one end portion and defines an annular shoulder facing the other end portion of the main section. The shoul...	08/20/1985
4321742	Method of producing curved wear lining This invention relates to a wear lining containing rubber e.g. for pumps intended for handling wearing material such as dredger and mud pumps of the centrifugal type, which wear lining comprises a layer of wear rubber rigidly combined with a support plate...	03/30/1982
4219917	Pump modification for matching performance The operating characteristics and the nominal, best operating point of a multi-stage centrifugal pump are shifted to lower flow rates without loss of nominal head and without substantial loss of efficiency by machining or otherwise shortening the trailing...	09/02/1980
4181466	Centrifugal compressor and cover A centrifugal compressor is described herein which comprises a bearing housing, an impeller rotatably mounted to the housing, and an integral compressor cover mounted upon the housing and including an impeller chamber within which the impeller is received...	01/01/1980
4172310	Improvement in assembling a centrifugal pump A centrifugal pump of the type comprising a housing, a shaft rotatably mounted in said housing via a bearing, a wheel having a hub fixed to the shaft, a seal assembly comprising on the one hand a counter-ring and on the other a seal including a friction r...	10/30/1979

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Class 29/888.024 - Centrifugal type