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Rotary expansible chamber devices

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.
04/10/2014 > 3 patent applications in 3 patent subcategories.

20140099225 - Pump: The invention provides a pump comprising a pump inlet, a pump outlet, at least two threaded rotors and a pressure controlled valve, the pressure controlled valve being capable of controlling re-circulation of fluid from the pump outlet to the pump inlet. The pressure controlled valve can be a control valve.... Agent: Bp Exploration Operating Company Limited

20140099226 - Simplified roots-type blower: The present disclosure relates to a simplified roots-type blower having an improved sound signature. The roots-type blower includes a rotor bore housing having a molded, one-piece polymeric construction. The rotor bore housing defines a first rotor bore and a second rotor bore. The rotor bore housing also defines a first... Agent:

20140099227 - Pump apparatus: A pump apparatus includes: a housing; a pump unit; a suction passage; a discharge passage member including a discharge hydraulic passage which is formed therein, and which is arranged to discharge the hydraulic fluid pressurized by the pump unit to an outside of the housing; a first discharge passage insertion... Agent:

04/03/2014 > 3 patent applications in 3 patent subcategories.

20140093412 - Vacuum pump stators and vacuum pumps: Combined booster and primary pump arrangements can be bulky and require separate supplies of purge gas and cooling water. In order to overcome this problem invention provides a vacuum pump in which two or more pumping mechanisms, i.e. the booster pump and main pump, are housed in the same stator.... Agent: Edwards Limited

20140093413 - Compressor assembly having oil separation feature: A compressor assembly for compressing a working fluid and lubricated with an oil, including a housing having a suction plenum and a discharge plenum that defines a discharge chamber and an exhaust chamber in fluid communication through a discharge chamber outlet, and a compression mechanism disposed in the housing. A... Agent: Delphi Technologies, Inc.

20140093414 - Rotary compressor: A rotary compressor, used e.g. in an air conditioner, includes a compressing unit having an end plate that closes an end portion of an annular cylinder. The end plate includes a groove portion accommodating a discharge valve portion having a reed valve type discharge valve and a discharge-valve limiter. The... Agent: Fujitsu General Limited

03/27/2014 > 5 patent applications in 4 patent subcategories.

20140086775 - Scroll compressor with bearing: A scroll compressor having a bearing is provided. The scroll compressor includes: a casing; a main frame fixed to the casing and having a shaft insertion hole formed therein; a fixed scroll fixed to the casing and disposed above the main frame; an orbiting scroll forming a compression chamber together... Agent:

20140086776 - Surface treating agent for wear-resistance surface, manufacturing method thereof and compressor using the same: The present disclosure relates to a wear-resistant surface treating agent, a manufacturing method thereof, and a compressor using the same. According to one aspect of the present disclosure, the surface treating agent includes an organic solvent, nanodiamond powder and carbon nanotube powder dispersed in the organic solvent, and a PTFE... Agent:

20140086777 - Synthetic resin bearing and scroll compressor having the same: A synthetic resin bearing and a scroll compressor using the same are provided. In the synthetic resin bearing as a journal bearing fixed to an orbiting scroll or a main frame and relatively rotated with respect to a rotational shaft in a scroll compressor, the journal bearing is made of... Agent:

20140086778 - Internal gear pump, especially for a vehicle hydraulic brake system: An internal gear pump includes a separator arranged in a pump chamber of the internal gear pump. The separator divides the pump chamber into a delivery chamber and a suction chamber and is arranged so as to be radially moveable and capable of pivoting. The internal gear pump further includes... Agent: Robert Bosch Gmbh

20140086779 - Gear machine having a low-pressure connection deviating from the circular shape: A gear machine includes two externally intermeshing gear wheels enclosed by a housing that has a high-pressure connection and a low-pressure connection situated opposite one another. On an inner circumferential face of the housing, a notional boundary line is assigned to both gear wheels. The line runs parallel to the... Agent: Robert Bosch Gmbh

03/20/2014 > 1 patent applications in 1 patent subcategories.

20140079581 - Rotor for pump: The present invention relates to a rotor for a vacuum pump having a roots pumping mechanism, the rotor comprising at least two hollow lobes, each lobe having an outer wall which defines a lobe profile, a hollow cavity generally inward of the outer wall, and at least one strengthening rib... Agent: Edwards Limited

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