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Rotary expansible chamber devices January recently filed with US Patent Office 01/12

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.
01/26/2012 > 3 patent applications in 3 patent subcategories.

20120020823 - Rotating and reciprocating piston device: The present document describes a rotating and reciprocating piston device comprising: chambers disposed about a chamber axis, the chambers having two ends and a port for passage of a fluid at each one of the ends of the chambers; pistons having two ends, each one of the pistons slidably positioned... Agent:

20120020824 - Roots supercharger with a shunt pulsation trap: A shunt pulsation trap for a Roots supercharger reduces pulsation, NVH and improves efficiency without significantly increasing overall size of the supercharger. Generally, a Roots supercharger with the shunt pulsation trap has a pair of interconnected and synchronized parallel multi-helical-lobe rotors housed in a transfer chamber with the same number... Agent:

20120020825 - Displacement pump with suction groove: A displacement pump, including a pump chamber and a regulating chamber which are separated from each other by a piston, wherein the pump has a device with which fluid flowing from the pump chamber toward the regulating chamber can be drained.... Agent: Schwabische Huttenwerke Automotive Gmbh

01/19/2012 > 2 patent applications in 2 patent subcategories.

20120014825 - Roots type fluid machine: A roots type fluid machine includes a case having a side wall, a pair of rotary shafts provided in the case, a pair of rotors engaged with each other and fixed to the pair of rotary shafts so as to extend axially, respectively, a suction space formed by the case... Agent: Kabushiki Kaisha Toyota Jidoshokki

20120014826 - Rotary piston engine: The invention relates to a rotary piston engine comprising at least two rotors, a power component and a blocking component, which interact and which have spur gearings the number of teeth of which differs by one tooth, the rotors and an engine housing accommodating the rotors delimiting working compartments. The... Agent: Robert Bosch Gmbh

01/12/2012 > 4 patent applications in 4 patent subcategories.

20120009076 - Scroll compressor: A scroll compressor is provided. The scroll compressor may include a valve and a valve spring accommodated in a housing as one module, and the housing may be directly coupled to a fixed scroll. This may simplify assembly processes of the scroll compressor. Further, a sealing recess that communicates with... Agent:

20120009077 - Scroll fluid machine: A scroll fluid machine with ensured reliability of an oil seal and a bearing even in a compressor operation at high rpm and high load is provided, which includes: a fixed scroll; an orbiting scroll facing the fixed scroll and having a boss provided on a face opposite to the... Agent: Hitachi Industrial Equipment Systems Co., Ltd.

20120009078 - Vane compressor: A vane compressor according to the present invention, including a cylinder which is approximately cylindrical and whose both ends located in an axial direction are open, a cylinder head and a frame which close both the ends of the cylinder, a rotor shaft which includes a rotor part being cylindrical... Agent: Mitsubishi Electric Corporation

20120009079 - Single screw compressor: In a single screw compressor, gates of a gate rotor mesh with helical grooves of the screw rotor in a casing. The casing has a low pressure space, and a divider wall covering the outer peripheral surface of the screw rotor to divide the fluid chamber formed by the helical... Agent: Daikin Industries, Ltd.

01/05/2012 > 2 patent applications in 2 patent subcategories.

20120003112 - Uniaxial eccentric screw pump: Provided is a uniaxial eccentric screw pump which can prevent the life of a bearing sliding portion from decreasing due to a thrust load applied from a high pressure side to a low pressure side. An external thread-like motor directly coupled with a driving shaft is rotated and eccentrically moved... Agent: Furukawa Industrial Machinery Systems Co., Ltd.

20120003113 - Screw compressor: A screw compressor includes a casing, a screw rotor, an oil sump containing lubricant oil, a lubrication passage and a flow rate controller. The screw rotor is inserted in a cylinder portion of the casing to form a fluid chamber. The screw rotor rotates to suck a fluid into the... Agent: Daikin Industries, Ltd.

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