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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.
10/02/2014 > 13 patent applications in 9 patent subcategories.

20140294639 - Rotary compressor: An aspect of the present disclosure involves a rotary compressor that is primarily optimized for use without the need for liquid lubricants, such as in the flow path of the fluid being compressed, and is efficient and quiet to use. The compressors described herein are efficient, run quietly, use less... Agent:

20140294638 - Thermal/noise management in a scroll pump: The speed of a cooling fan of a scroll pump is controlled such that fan-generated noise can be kept low. The scroll pump includes a pump head, a pump motor, the fan, a controller and one or more sensors. The pump head includes a plate scroll set in which a... Agent: Agilent Technologies, Inc.

20140294640 - Scroll pump having separable orbiting plate scroll and method of replacing tip seal: A scroll pump facilitates the installation of a new tip seal between an axial end of the scroll blade of one of inner stationary and orbiting plate scrolls of the pump and the plate of the other of the inner stationary plate and orbiting plate scrolls. To this end, the... Agent:

20140294641 - Scroll fluid machine: In a scroll air compressor as a scroll fluid machine capable of being downsized with an increased cooling effect, cooling air entering through a fixed inlet of a fixed cooling passage provided at the rear of a fixed scroll, and an orbiting inlet of an orbiting cooling passage provided at... Agent:

20140294642 - Vane compressor: A gap between a vane tip and a cylinder inner circumferential surface is denoted by δ. If rv is set as in an Expression (1), a first vane rotates with the vane tip thereof being out of contact with the cylinder inner circumferential surface. In the vane compressor, wear at... Agent: Mitsubishi Electric Corporation

20140294643 - Refrigerant compressor: A refrigerant compressor includes a compressor mechanism part 2, and a motor and a crank shaft 101 for driving the compressor mechanism part, in a sealed case 100, and includes sliding bearings 103, 104, and 105 at least either in an engagement part between the compressor mechanism part and the... Agent: Hitachi, Ltd.

20140294644 - Pump: A pump includes: a housing in which a pump chamber that is a columnar space is formed, the pump chamber being provided with a suction-side groove and a discharge-side groove that are formed as recesses; an outer rotor rotatably disposed in the pump chamber and having internal teeth on an... Agent: Jtekt Corporation

20140294645 - Rotary element and rotary displacement device comprised thereof: This disclosure describes new construction for rotary elements that find use in rotary displacement devices, e.g., positive displacement pumps and meters. The proposed construction may incorporate fibers, e.g., carbon fibers, disposed in a resin matrix. This construction can reduce the need to perform secondary processes that are necessary to utilize... Agent: Dresser Inc.

20140294647 - Pre-compression dual spring pump control: A variable capacity vane pump (20) is provided having a pump control ring (44) that is moveable to alter the capacity of the pump (20). A control chamber (60) is formed between the pump casing (22) and the control ring (44). The control chamber (60) is operable to receive pressurized... Agent: Magna Powertrain Inc.

20140294646 - Toroidal engine: A toroidal engine that can be powered by a fuel/air mixture or by a compressed gas source. The toroidal engine uses one-way bearings to transfer torque generated in a toroidal chamber directly to a drive shaft. Pairs of pistons are mounted on two crank assemblies, which are concentric with the... Agent: Dalhousie University

20140294648 - Apparatus for sealing a pump chamber of a rotary lobe pump, and a rotary lobe pump having said apparatus: The invention relates to an apparatus for sealing a pump chamber of a rotary lobe pump vis-a-vis a fluid-free region of the rotary lobe pump, in particular in the region of a shaft duct, wherein the apparatus has two or more sealing elements, which can be disposed adjacent to a... Agent:

20140294649 - Pump device: In a hollow seal member kept in abutted-engagement with a shaft hole formed in a housing via an elastic body and kept in sliding-contact with an outer circumference of a drive shaft for sealing against a leakage of fluid from a pump chamber, the seal member is provided with a... Agent:

20140294650 - Vane pump: A vane pump is used as a fluid pressure supply source and includes a rotor which is driven and rotated, a plurality of slits which are radially formed in the rotor, a plurality of vanes which slidably project from the slits, a cam ring with which tip parts of the... Agent:

09/25/2014 > 4 patent applications in 4 patent subcategories.

20140286806 - Multi-stage vacuum pump: A multi-stage vacuum pump may include a sealing arrangement for sealing between the stator components of the pump. The end seals of the arrangement comprise an annular portion for sealing between end stator components and shell components and axial portions which extend from the annular portion and together with separate... Agent: Edwards Limited

20140286807 - Vane compressor: A vane compressor includes a cylinder, a rotor portion, vanes, and a first discharge port allowing a refrigerant in a compression chamber to be discharged therethrough. The vanes are disposed inside the rotor portion and held rotatably about the center of a cylinder inner circumferential surface, partition a space between... Agent: Mitsubishi Electric Corporaton

20140286808 - Eccentric screw machine: An eccentric screw machine (10) demonstrates a Stator (11) having an inner lining (17), which demonstrates teeth projecting inwards. The tips of these teeth are provided with micro-ribs (26 to 29), which are embodied asymmetrically with respect to the radials (R). They preferably demonstrate a flatly rising edge (30) and... Agent: Wilhelm Kachele Gmbh

20140286809 - Pump: A pump includes a second housing member in which a suction-side groove and a discharge-side groove are formed at a predetermined interval in a circumferential direction of a bottom of a pump chamber so as to be recessed in the bottom of the pump chamber. Fitting portions that are fitted... Agent: Jtekt Corporation

09/18/2014 > 22 patent applications in 16 patent subcategories.

20140271298 - Internal gear pump: An internal gear pump includes a pump rotor (4) in which a meshing point between an inner rotor (2) having n teeth and an outer rotor (3) having (n+1) teeth is located rearward, in a rotational direction of the rotor, relative to an eccentric axis (CL) along which a center... Agent:

20140271297 - Net-displacement control of fluid: Methods for controlling the net-displacement of a rotary fluid pressure device are disclosed. One of the net-displacement control methods (47) includes obtaining a desired input parameter (23) and a relative position (21) of a first member (43) and a second member (35) of a fluid displacement mechanism. A determination of... Agent: Eaton Corporation

20140271296 - No corner seal rotary vane actuator: The subject matter of this specification can be embodied in, among other things, a rotary vane actuator. A rotor assembly includes longitudinal vanes disposed radially on a central shaft, with each vane connected at their ends to a circular plates secured to the shaft. Each vane has an outer edge,... Agent: Woodward, Inc.

20140271295 - Rotary vane actuator with fluid actuated mechanical lock: The subject matter of this specification can be embodied in, among other things, a seal assembly that includes a compressible seal slidably mounted on a central longitudinal shaft of a rotor assembly, the seal having a first lateral surface adapted for contacting a first end surface of a first stator... Agent: Woodward, Inc.

20140271299 - Hydraulically balanced stepwise variable displacement vane pump: A binary vane pump providing a balanced, stepwise variable displacement is provided. The binary vane pump includes a pressure plate having first and second discharge ports configured to discharge fluid from the binary vane pump to a first discharge path and a thrust plate having third and fourth discharge ports... Agent: Steering SolutionsIPHolding Corporation

20140271300 - Progressive cavity pump/motor drive mechanism: A progressing cavity pump has a rotor that moves in an eccentric motion, and is driven by a drive shaft that rotates about a fixed axis. Various means have been used to connect the two; mostly using an intermediate shaft called a connecting rod that has a universal joint at... Agent: Roper Pump Company

20140271301 - Dual axis rotor: This disclosure concerns an advanced nutating positive displacement device having a high power to mass ratio and low production cost. This device in one example forms an exemplary pump as will be discussed in detail. The examples disclosed herein are of the rotary positive displacement type, but in a class... Agent:

20140271302 - Scroll compressor with a bypass: An upper back pressure type scroll compressor having a bypass is provided. The scroll compressor may include a casing, a discharge cover, a main frame, a first scroll supported by the main frame, and a second scroll that forms a suction chamber, an intermediate pressure chamber, and a discharge chamber... Agent:

20140271303 - Vane-type compressor: A vane-type compressor includes a rotor shaft that includes rotating shaft portions and a rotor portion, which are integrated with one another. A lower end of the rotating shaft is disposed in an oil reservoir. The vane-type compressor also includes vane aligners disposed at both end portions of vanes, and... Agent: Mitsubishi Electric Corporation

20140271304 - Scroll compressor with back pressure chamber: An upper back pressure type scroll compressor is provided having a back pressure chamber. The scroll compressor may include a casing, a discharge cover, a main frame, a first scroll supported by the main frame, and a second scroll forming a suction chamber, an intermediate pressure chamber, and a discharge... Agent:

20140271305 - Scroll pump having bellows providing angular synchronization and back-up system for bellows: A scroll pump has a metallic bellows that angularly synchronizes the stationary and orbiting scroll blades of the pump, and a hack-up system for the bellows. The back-up system consists of pins integral with and fixed relative to one of the stationary and orbital parts of the scroll pump, and... Agent: Agilent Technologies, Inc.

20140271306 - Scroll compressor with back pressure discharge: A scroll compressor having a back pressure discharge is provided. The scroll compressor may include a casing, a discharge cover, a main frame, a first scroll supported by the main frame, and a second scroll forming at least a discharge chamber together with the first scroll. The second scroll may... Agent:

20140271307 - Scroll compressor having a scroll supporter and/or movement limiter: A scroll compressor having a scroll supporter and/or movement limiter is provided. The scroll compressor may include a casing, a main frame fixedly installed within the casing, a first scroll rotatably supported by the main frame, a second scroll supported by the main frame, such that the second scroll is... Agent:

20140271308 - Gerotor rotary stirling cycle engine: Stirling cycle engines with hot and cold gerotor sets separated by an insulation barrier. The barrier has regenerative gas passages to allow gasses to flow therethrough thus connecting displacing chambers of the hot and cold gerotor sets. Each gerotor set has a rotor within a stator and displacing chambers created... Agent:

20140271309 - Torque-generating steering device: A torque generator is disclosed. The torque generator includes a valve arrangement including a spool valve and a valve sleeve. A torsion bar biases the valve arrangement toward a neutral position.... Agent: Eaton Corporation

20140271310 - Clubhead vane pump with balanced vanes: The subject matter of this specification can be embodied in, among other things, a fluid pump that includes a housing with a cam block. The pump also includes a collection of vanes, each having a shank having a leading edge and a trailing edge, and a head having a curved... Agent: Woodward, Inc.

20140271311 - Internal gear pump: An internal gear pump includes a pinion and an annulus as a return pump in a hydraulic vehicle brake system. The internal gear pump further includes an axial disk and an intermediate piece. The intermediate piece is configured to be acted upon by an outlet pressure of the internal gear... Agent: Robert Bosch Gmbh

20140271312 - Piston with replaceable and/or adjustable surfaces: A piston for a pump a hub portion defining opposing outer portions, and inserts configured to provide an adjustable surface coupled to each of the opposing outer portions. The hub portion includes a first hub portion and a second hub portion configured to abut one another. Each of the inserts... Agent:

20140271313 - Toothed-lobed gear pump: Toothed gears and lobed gears intermesh to create large volume pockets in gear sets of a given size. The pockets are larger than the pockets that exist in current tooth or lobe pumps and provide the benefit of a pump that better handles shear sensitive liquids. Preferably, the profiles of... Agent:

20140271314 - Gear wheel with profile capable of meshing with semi-encapsulation in a geared hydraulic apparatus: A gear wheel comprising a plurality of helical teeth, each helical tooth of the gear wheel having a tooth profile meshing with semi-encapsulation in a geared hydraulic apparatus. Each tooth having a profile which falls within a band of tolerance of +− 1/15 of the depth of a nominal tooth... Agent: Settima Meccanica S.r.l.

20140271315 - Vane compressor: To allow a bush to stably rotate about a bush center, an end of a vane portion that is close to an inner circumferential surface center is always positioned on the inner side with respect to the bush center. Thereby, in a vane compressor a vane is stably supported, wear... Agent: Mitsubishi Electric Corporation

20140271316 - Reducing flow communication between chambers of guided-vane rotary apparatus: A guided-vane rotary apparatus having working chambers and rotor hub sectors which are separated from one another by vane assemblies and which rotate within a housing opening embody features which reduce the likelihood of flow communication between the working chambers. To this end, the apparatus includes sealing arrangements which are... Agent:

09/11/2014 > 18 patent applications in 7 patent subcategories.

20140255231 - Scroll compressor: A scroll compressor comprises a housing, a cylindrical rotating shaft, a fixed scroll, a movable scroll, and a drive mechanism. The drive mechanism includes an eccentric pin, and a balancer-integrated bush. The eccentric pin extends in parallel with the rotating shaft from the end part of the rotating shaft. The... Agent: Kabushiki Kaisha Toyota Jidoshokki

20140255233 - Compacted/vermicular graphite cast iron for orbital or fixed scroll and manufacturing method of orbital or fixed scroll using the same: Compacted/vermicular (CV) graphite cast iron for an orbital or fixed scroll and a method for manufacturing an orbiting or fixed scroll using the same are provided. The CV graphite cast iron may includes C: 3.4˜3.9%, Si: 1.7˜2.6%, Mn: 0.2˜0.8%, P: 0.02˜0.07%, S: 0.01˜0.03%, Ti: 0.02˜0.1% by weight ratio, with the... Agent:

20140255232 - Planetary rotor machine manifold: Various apparatuses are provided for planetary rotor machines including a plurality of helical rotors and a corresponding manifold. In one example, the manifold includes a head plate to which each of the rotors is rotatably mounted. The head plate includes a fluid flow opening having a center coaxial with a... Agent:

20140255234 - Pump system: One embodiment of the pump system includes a cover housing and a main body affixed to one another for operation. A drive and idler gear may be mounted within a gear chamber in the main body for rotation there about, and inlet fluid may be provided on both the axial... Agent:

20140255235 - Self adjusting gear pump: A self-adjusting gear pump is disclosed. The pump may be a crescent internal gear pump, a gerotor pump, or an external gear pump. The pump includes a pump housing, gear housing, first and second gears, a side plate housing with a side plate, a shim and an end plate. The... Agent: Imo Industries, Inc.

20140255236 - Internal gear pump: An internal gear pump for a hydraulic vehicle brake system includes a bearing formed for a pump shaft in a tubular form. The bearing is integrally formed with a housing of the internal gear pump. The bearing is configured to mount a pinion of the internal gear pump rotatably on... Agent: Robert Bosch Gmbh

20140255238 - Rotor of vane pump and method of manufacturing rotor: A rotor of a vane pump and a method of manufacturing a rotor are provided. The rotor may be formed to include a plurality of radially formed slots and having a disk shape, and may include approximately 20% to 70% of pig iron, approximately 0.2% to 0.5% of copper (Cu),... Agent:

20140255237 - Vane pump: A vane pump is provided that may include a rotor having a plurality of slots formed on an outer circumferential surface thereof; a vane slidably inserted into each of the plurality of slots; and a cam ring configured to receive the rotor therein and having a inner circumferential surface in... Agent:

20140255239 - Air compressor: Disclosed is an air compressor including a cylinder including a recessed compression chamber, and an orbiter including a frame forming a main body and a piston rod protruding from the frame, wherein the piston rod includes a piston rod inner circumferential surface and a piston rod outer circumferential surface, the... Agent:

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