Rotary expansible chamber devices inventions 09/08

20080232990 - Scroll compressor with compliant retainer: A scroll compressor may include a shell, a bearing housing, first and second scroll members, and a ring member. The bearing housing may be supported within the shell and may include at least three axially extending arms. The first scroll member may be supported on the bearing housing and may... Agent: Harness, Dickey & Pierce, P.L.C

20080232991 - Rotary fluid machine: A rotary fluid machine includes an eccentric rotary piston mechanism that is configured such that an annular piston is accommodated in an annular cylinder chamber of a cylinder to form an outer cylinder chamber and an inner cylinder chamber. The cylinder and the annular piston relatively execute eccentric rotary motion.... Agent: GlobalIPCounselors, LLP

20080232992 - Fluid machine: In a compression/expansion unit (30) serving as a fluid machine, both a compression mechanism (50) and an expansion mechanism (60) are housed in a single casing (31). An oil supply passageway (90) is formed in a shaft (40) by which the compression mechanism (50) and the expansion mechanism (60) are... Agent: Birch Stewart Kolasch & Birch

20080232993 - Fastener member and gas compressor using the same: In a gas compressor, a fastener part is fastened by a fastener member comprised of a bolt coated with a zincate bath and a gasket, any leakage from the fastener member is prevented, the gas compressor including a case 11 and a front head 12 fastened by a first fastener... Agent: Wenderoth, Lind & Ponack, L.L.P.

20080232994 - Inner rotor of internal gear pump: A crankshaft and an mounting hole have two main circular arc parts on the same circle; and two connecting parts for connecting the adjacent main circular arc parts, and have a cross-sectional shape in which the connecting parts facing each other are substantially parallel. The connecting parts of the mounting... Agent: Darby & Darby P.C.

20080226480 - Multi-stage trochoidal vacuum pump: A vacuum pump includes first, second, third and fourth pump stages. Each pump stage has a trochoidal-shaped cavity and a rotor that rotates within the respective cavity. Each cavity has a volume determined by the depth of the cavity and a generally corresponding thickness of the rotor. The fourth stage... Agent: Jerry Turner Sewell

20080226481 - Screw vacuum pump: The invention provides a dual inlet screw pump, in which a chamber 18 defines with first and second externally threaded rotors 30, 32 respective fluid flow paths within the chamber 18. This can enable fluid entering the pump via a first inlet 20 to be pumped substantially in isolation from... Agent: The Boc Group, Inc.

20080226482 - Compressor with controlled capacity: A compressor with controlled capacity mainly includes a double cylinder compressor with a reservoir, a capacity switch device, the outlet for the intake pipe of the said reservoir is divided into two branches, which are connected with the upper and lower cylinder through a capacity switch device switched between the... Agent: GlobalIPServices

20080226483 - Compressor: A compressor comprises an oil separator for separating oil from a refrigerant compressed by a compression mechanism unit, and a high-pressure oil storage chamber for storing the oil separated by the oil separator. At least a portion of the oil separator is provided outside a housing. The high-pressure oil storage... Agent: Posz Law Group, PLC

20080226484 - Internal gear pump: To provide an internal gear pump capable of preventing small vibrations due to pressure differences at the outlet port side of a crescent disposed between the outer rotor and the inner rotor, so that fatigue failure does not occur in the crescent over a long time period, whereby the durability... Agent: Mcginn Intellectual Property Law Group, PLLC

20080226485 - Rotation body cleaning unit and vacuum pump having the same: Provided is a vacuum pump having a rotation body cleaning unit. The vacuum pump includes a case provided with rotation guide holes at opposite end parts. The case includes a rotation body placed inside the case and including a rotation shaft having opposite ends rotatably supported by the rotation guide... Agent: Marger Johnson & Mccollom, P.C.

20080219871 - Scroll compressor: A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll. The scroll compressor includes a compression section 3 constituted of an orbiting scroll... Agent: Buchanan, Ingersoll & Rooney Pc

20080219872 - Scroll machine having counterweights with changeable cavity: A balancing system for different compressors utilizes a counterweight having a common exterior configuration. The mass of the counterweight is optimized for each compressor by changing the size of a recess located in the counterweight. In one embodiment, the recess is an arcuately shaped recess; and in another embodiment, the... Agent: Harness, Dickey & Pierce, P.L.C

20080219873 - Vane pump: A vane pump includes a rotor chamber; a rotor eccentrically accommodated in the rotor chamber; a plurality of vanes attached to the rotor, each vane having a leading end adapted to make sliding contact with an inner peripheral surface of the rotor chamber. The vane pump includes working compartments surrounded... Agent: Bacon & Thomas, Pllc

20080219874 - Variable displacement vane pump: A variable displacement vane pump includes a pump body, a rotor, an annular cam ring, a rear body closing the pump body, a low pressure supply passage constantly connecting the inlet passage and the other of the first fluid pressure chamber and the second fluid pressure chamber, a low pressure... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080219875 - Magnetic drive vane pump: A magnet drive rotary vane pump has a casing with a pump cavity. A rotor carrying a plurality of vanes is disposed within the pump cavity to be rotatable about an eccentric axis with respect to the pump cavity for drawing the fluid into the pump cavity and expelling it... Agent: Edwards Angell Palmer & Dodge LLP

20080219876 - Rotary piston machine: A rotary piston machine includes a driving part driven by an electric motor, and a driven part that have mutually engaging end-face denticulation for delivering a medium, the driving part and the driven part being housed in a machine housing and connected to the machine housing via respective bottom bearings... Agent: Jordan And Hamburg LLP

20080219877 - Rotor, a method for producing such rotor and a pump comprising such rotor: The invention relates to a rotor for a positive displacement rotary pump. The rotor comprises a hub with an aperture and a centre axis through said aperture and at least 2 lobes radially extending from said hub and in a direction essentially perpendicular to the axis of said hub. The... Agent: Merchant & Gould Pc

20080213116 - Multi-stage rotary compressor: A multi-stage rotary compressor comprises: a casing having a sealed space therein; a driving unit installed in the casing, for generating a driving force; a first compression unit and a second compression unit for receiving the driving force from the driving unit and compressing a refrigerant; and a connection unit... Agent: Mckenna Long & Aldridge LLP

20080213117 - Pump rotor: In pump rotors and used in an internal gear pump, which includes an inner pump rotor having outer gear teeth; an outer pump rotor having inner gear teeth that mesh with the outer gear teeth; and a casing having a pumping-in port through which a fluid is pumped in, and... Agent: Darby & Darby P.C.