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Rotary expansible chamber devices May archived by USPTO category 05/11

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
05/26/2011 > patent applications in patent subcategories.

20110123378 - Screw pump rotor and method of reducing slip flow: A pump rotor for a screw pump includes a shaft, a first set of threads disposed on a portion of an outer surface of the shaft, at least one thread of the first set of threads including a groove disposed on an end portion thereof, and a ring seal disposed... Agent: General Electric Company

20110123379 - Variable displacement pump: A variable displacement pump includes a pump structural member configured to change volumes of a plurality of working chambers by rotation of a rotor, so as to introduce oil through an inlet port into the working chambers and to discharge the oil through a discharge port, and further configured to... Agent: Hitachi Automotive Systems, Ltd.

20110123380 - Pump: A progressive cavity pump is provided, having a stator section and a rotor section axially aligned with and surrounded by the stator section, a drive shaft connection section and a suction chamber, arranged between the stator section and the drive shaft connection section; wherein the suction chamber is configured such... Agent: Mono Pumps Limited

20110123381 - Compressor: The present invention provides a compressor, comprising: a stator (220); a cylinder type rotor (230) rotating within the stator (220) by a rotating electromagnetic field from the stator (220), with the rotor defining a compression chamber inside; a roller (242) rotating within the compression chamber of the cylinder type rotor... Agent:

05/19/2011 > patent applications in patent subcategories.

20110116958 - Rotary engine expansion chamber apparatus and method of operation therefor: An engine is described for operation on a fuel expanding about adiabatically in a power stroke of the engine. To aid the power stroke efficiency, the rotary engine contains one or more of a rotor configured to rotate in a stator, the rotor offset along both an x-axis and a... Agent:

20110116960 - Stator inserts, methods of fabricating the same, and downhole motors incorporating the same: The present invention recites a downhole motor and method of manufacture wherein a mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator is provided. A flexible sleeve is provided over the mandrel and the flexible sleeve and the mandrel are provided into a... Agent:

20110116961 - Stators for downhole motors, methods for fabricating the same, and downhole motors incorporating the same: The present invention recites a downhole motor and method of fabricating the same, wherein the method for fabricating a stator for a downhole motor includes the providing of a mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator and the application of a... Agent:

20110116959 - Stators for downwhole motors, methods for fabricating the same, and downhole motors incorporating the same: The present invention recites a method of fabricating a stator for a downhole motor, the method comprising the steps of providing a stator tube having an interior surface and applying a bonding agent to the interior surface of the stator tube. Additionally, a mandrel is positioned within the stator tube,... Agent:

20110116962 - Geared motor assembly: A geared motor assembly comprises a rotation-transmitting shaft for transferring output rotation of a reducer on the front side of a motor to an output shaft sensor on the rear side of the motor. A front end portion of the rotation-transmitting shaft is securely bonded to a rotation output member... Agent: Harmonic Drive Systems Inc.

05/12/2011 > patent applications in patent subcategories.

20110110810 - Compression apparatus with variable speed screw and method: An apparatus is provided for compressing a loose solid feedstock. The apparatus includes a two stage compressor. The first compression stage is a screw compressor. The second compressor stage is a reciprocating compressor. The reciprocating compressor operates co-axially with, and receives its feed from, the screw compressor. A choke cone... Agent: Sunopta Bioprocess Inc.

05/05/2011 > patent applications in patent subcategories.

20110103987 - Pump system: The present invention provides a pump system comprising a bearing housing coupled to a pump liner, the pump liner defining a fluid conduit, the pump liner comprising a fluid inlet and a fluid outlet; and at least one rotor having a first rotor portion and a second rotor portion, the... Agent: General Electric Company

20110103988 - Compressor having capacity modulation system: A compressor may include a housing and first and second scroll members supported within the housing, each having an end plate with a spiral wrap extending therefrom and meshingly engaged with the other to form a series of compression pockets operating at an intermediate fluid pressure between a suction pressure... Agent: Emerson Climate Technologies, Inc.

20110103989 - Progressing cavity pump rubber reinforcement device for rotor alignment: A progressing cavity pump assembly utilizes a reinforced upper section of the stator rubber helix. The pump stator is located at the end of a string of tubing. The reinforced upper section of the stator rubber helix is strong enough, whether reinforced by mechanical means or by strengthening the rubber... Agent: Baker Hughes Incorporated

20110103990 - Scroll compressor: A scroll compressor is constructed by combining a stationary scroll and an orbiting scroll formed by erecting a scroll-shape wrap upright on a base plate meshing with each other. A scroll member constructing the stationary scroll or the orbiting scroll is constructed of an inner layer member 601 forming a... Agent: Hitachi Appliances, Inc.

20110103991 - Scroll fluid machine: A fixed scroll board 2 is attached to a casing 1. Three fixed wraps 2a are provided on the fixed scroll board 2. An eccentric bush 8 is rotatably supported by the casing 1. A pivot shaft 12 is eccentrically supported in an eccentric hole of the eccentric bush 8.... Agent: Richstone Limited

20110103992 - Gear pumps and methods for using gear pumps: Gear pumps and methods of using the gear pumps are provided. In general embodiments, the pumps comprise a gear housing defining a passage and having an inlet and an outlet and one or more gears contained within the gear housing. The gears can comprise corresponding bearings that are movably engaged... Agent:

20110103993 - Gear wheel with profile capable of meshing with semi-encapsulation in a geared hydraulic apparatus: A geared hydraulic apparatus comprises a pair of gear wheels which mesh with each other with semi-encapsulation. Each gear wheel has a plurality of teeth with a profile which falls within a band of tolerance of ±15, more preferably ±20, and even more preferably ±30 with respect to the height... Agent: Mario Antonio Morselli

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