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Rotary expansible chamber devices April category listing, related patent applications 04/12

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.
04/26/2012 > 6 patent applications in 5 patent subcategories.

20120100024 - Scroll compressor with partial unloader for start-up: A scroll compressor may be provided with a check valve interposed between a balance chamber and a discharge chamber. The check valve may allow balance chamber pressure to remain low during start-up of the compressor. Low balance chamber pressure may allow an orbiting scroll to remain unclamped to a fixed... Agent: Honeywell International Inc.

20120100025 - Multi-stage scroll machine: A machine having two volute casings describing an orbital relative movement, one of the volute casings being fitted with at least one scroll and the other volute casing being equipped with at least two scrolls, the various scrolls delimiting a first series of variable-volume chambers belonging to a first compression... Agent: Danfoss Commercial Compressors

20120100026 - Scroll compressor: A scroll compressor comprises two scrolls (40, 46) having respective scroll plates (42, 48) and respective scroll walls (44, 50). The scroll walls intermesh so that on relative orbital movement of the scrolls a volume (52, 54) of gas is trapped between the scrolls and pumped from an inlet (31)... Agent: Edwards Limited

20120100027 - Internal-rotation type gear pump and method of assembling and repairing an internal-rotation type gear pump: A method of assembling and repairing an internal-rotation type gear pump has a preparing step, a disassembling step, a taking step, a repairing step and an assembling step. The preparing step includes preparing an internal-rotation type gear pump with a bearing mount device, a gland-sealing device and a pump device... Agent:

20120100028 - Screw compressor: A screw compressor includes a screw rotor, a casing, a low pressure space, a bypass passage and a slide valve. The screw rotor is provided with a plurality of helical grooves forming fluid chambers. The casing includes a cylinder portion with the screw rotor disposed in the cylinder portion. The... Agent: Daikin Industries, Ltd.

20120100029 - Screw compressor: s

04/19/2012 > 3 patent applications in 3 patent subcategories.

20120093671 - Compressor: A compressor (10) comprises counter rotating and intermeshing twisted rotors (18) and (20) disposed in a housing having an air intake plate (28) and an outlet (16). The outlet (16) has a first edge (60) and a second edge (70) which nm parallel with a length of the rotors (18)... Agent: Sprintex Australasia Pty Ltd

20120093672 - Direct control linear variable displacement vane pump: A fluid pumping system for a power transmission device includes a variable displacement vane pump having a housing containing a rotor, a plurality of vanes coupled to the rotor and a linearly translatable slide for varying the displacement of the pump. A control system varies the displacement of the pump... Agent:

20120093673 - Six-blade biaxial rotary positive-displacement pump: A six-blade biaxial rotary positive-displacement pump includes a casing formed with a suction port and a discharge port, a pair of rotors accommodated in the casing and having rotor shafts rotatably mounted on housings fixed to opposed ends of the casing, respectively. Each rotor is formed with six blades extending... Agent:

04/12/2012 > 5 patent applications in 5 patent subcategories.

20120087818 - Scroll fluid machine: Disclosed is a scroll fluid machine configured from inexpensive materials and provided with a rotation prevention mechanism with excellent durability. In the scroll fluid machine, a fixed scroll, the spiral body of which has been vertically disposed on one end surface of an endplate, and a movable scroll, the spiral... Agent: Sanden Corporation

20120087819 - Rotary compressor: A high pressure dome type rotary compressor including a casing and a compression mechanism disposed in the casing to compress gas in a cylinder chamber. The compression mechanism has a discharge port and a discharge valve. The discharge valve is opened in a discharge process and is closed during a... Agent: Daikin Industries, Ltd.

20120087820 - Rotary device: A device includes a ring having a tubular interior surface centered about an axis. The surface includes a plurality of axially extending, inwardly-projecting ridges. On opposite sides of each ridge is a first port and a second port. A rotor rotates in the ring about the axis. A plurality of... Agent:

20120087821 - Pump assembly, in particular for helicopter lubrication: A pump assembly, in particular for lubrication in helicopters, has a casing, the lateral wall of which defines an intake port and a delivery port; and the casing houses two rotary pumps powered by a drive shaft via a motion-splitting transmission.... Agent: Agustawestland S.p.a.

20120087822 - Compressor: A compressor, characterized in that a steel is used as the base material for the other sliding material vane 10 and nitrided, a CrN or DLC film is formed on the surface by PVD treatment, and a Ni-Cr-Mo cast iron is used for the other corresponding sliding material piston 9.... Agent: Panasonic Corporation

04/05/2012 > 5 patent applications in 5 patent subcategories.

20120082578 - Scroll compressor: A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inner peripheral side of the seal member,... Agent:

20120082579 - Internal-gear type fluid device: In an internal-gear type fluid device, guide teeth are formed by inner teeth at an outer rotor, and vane portions extending in the width direction are formed at tooth tip portions of the guide teeth. Further, guide teeth are formed by outer teeth at the inner rotor, and vane portions... Agent: Fuji Jukogyo Kabushiki Kaisha

20120082580 - Screw expander: A screw expander in which a pair of male and female screw rotors engaged with each other are housed in a rotor chamber formed in a casing, an expansion force of a high-pressure gas supplied from an intake flow path to the rotor chamber is converted into a rotational force... Agent: Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

20120082581 - Gear pump: In a gear pump according to the present invention, a wall surface portion of a casing (2) includes a drive side partition surface (41) on which tooth crests (11) of a drive gear (10) slide, a driven side partition surface (42) on which tooth crests (21) of a driven gear... Agent: Tbk Co., Ltd.

20120082582 - Pendulum-slide cell pump: A pendulum-slide cell pump may include a rotationally mounted inner rotor connected via pendulum-slides with an outer rotor and wherein the outer rotor may be configured to transfer rotational movement of the outer rotor to the inner rotor via the pendulum-slides.... Agent:

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