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Rotary expansible chamber devices February patent applications/inventions, industry category 02/09

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.
02/26/2009 > patent applications in patent subcategories.

20090053088 - Reduced rotor assembly diameter vane pump: A vane pump with a reduced rotor diameter is provided. The reduced rotor diameter allows a reduction in the overall size of the pump which allows the pump to be used in circumstances wherein sufficient packaging volume does not exist for conventional vane pumps. Further, the reduced rotor diameter permits... Agent: Magna International, Inc.

02/19/2009 > patent applications in patent subcategories.

20090047160 - Rotary scissors action machine: A rotary machine is provided having rotating forward and rearward work members having cyclic non-constant angle motion there between, the machine includes a rotating shaft and a first gear eccentrically mounted with the rotating shaft. A reaction gear in mesh with the first gear causes the first gear to rotate... Agent: Ernest E. Helms Warn Partners, P.C.

20090047161 - Linking element for connecting the two volutes of a scroll compressor: The invention concerns an element comprising an annular body (9) provided with two series of pins (10, 12) projecting from at least one side of the body (9), the pins (10) of a first series being engaged in grooves (7) of the fixed volute (3) and the pins (12) of... Agent: Oliff & Berridge, PLC

20090047162 - Compressor and power transmission device: A compressor of the present invention having an electromagnetic clutch (14) for transmitting a driving force from a driving source (15) to a rotary shaft (4), in which the clutch (14) includes a rotor (16) rotated by receiving the driving force of the driving source (15), the rotor (16) containing... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20090047163 - Roots pump and fuel cell system: There is disclosed a Roots type pump in which two rotors are rotated synchronously in a pump chamber to compress fluid therein, wherein respective stop positions of the rotors in the pump chamber at a time of stopping the pump are determined independently of each other.... Agent: Kenyon & Kenyon LLP

02/12/2009 > patent applications in patent subcategories.

20090041602 - Scroll-type refrigerant compressor: A scroll-type refrigerant compressor includes a drive shaft with an off-axis lubrication conduit which is supplied with oil from an oil pan located in the lower part of the compressor by an oil pump that is disposed at a first end of the shaft. The lubrication conduit has lubrication holes... Agent: Oliff & Berridge, PLC

20090041603 - Refrigerating compressor with variable-speed coils: This refrigerating compressor comprises a sealed chamber delimiting a suction volume and a compression volume arranged respectively either side of a body contained in the chamber, and an oil injection circuit arranged to inject oil into the compression volume. The oil injection circuit comprises a moving blocking piece, operated by... Agent: Oliff & Berridge, PLC

20090041604 - Vane machine with stationary and rotating cylinder parts: i

20090041605 - Adjusting valve for adjusting the delivery volume of a displacement pump: An adjusting valve adjusting valve for adjusting the delivery volume of a displacement pump includes a valve casing, a valve piston which is mounted such that the valve piston can be moved within the valve casing, a valve spring which counteracts a force exerted by the valve-actuating pressure on the... Agent: Ratnerprestia

20090041606 - Vane compressor: Provide a vane compressor which starts the compression without delay, and which prevents the vanes from chattering under the start-up operation. To this end, the vane compressor 1 includes: a cylinder chamber 3; a rotor 5 rotatably arranged in the cylinder chamber 3; vane grooves 7 provided in the rotor... Agent: Foley And Lardner LLP Suite 500

02/05/2009 > patent applications in patent subcategories.

20090035166 - Two-stage rotary compressor: A two-stage rotary compressor having a compression mechanism including a single muffler housing member. The single muffler housing member at least partially defines an intermediate pressure discharge cavity and a discharge pressure discharge cavity. In one exemplary embodiment, the compression mechanism includes a cylinder block having a plurality of vanes... Agent: Baker & Daniels LLP 111 E. Wayne Street

20090035167 - Stepped scroll compressor with staged capacity modulation: A scroll compressor has a stepped wrap such that there is a greater height outer portion and a lesser height more central portion. Bypass ports are associated with the transition zone between the higher and lesser height portions. By providing the bypass port in a stepped scroll compressor, greater reductions... Agent: Carlson, Gaskey & Olds, P.C.

20090035168 - Scroll-type refrigerant compressor: The invention relates to a scroll-type refrigerant compressor The inventive compressor comprises: a sealed chamber which is defined by a ferrule (2) and which contains a suction volume and a compression volume; and an electric motor which is disposed on the suction side and which comprises a stator (7) and... Agent: Oliff & Berridge, PLC

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