Rotary expansible chamber devices inventions 12/07

20070297928 - Rotary vane machiine: A rotary-vane machine, has a stationary tubular housing having a lubricated pump with an oil carter, and an oil-free section, with two pairs of ports through which a working medium enters or exits, a housing cover plate, a sun gear attached to a boss, a bearing and oil transferring member,... Agent: Lowe Hauptman Ham & Berner, LLP

20070297929 - Scroll compressor with back pressure chamber cavity for assisting in start-up: A scroll compressor is provided with a cavity in its back pressure chamber to increase a volume of the back pressure chamber. In this manner, at start-up, the back pressure chamber will not be effective to bias the two scroll members together until this enlarged volume is filled with a... Agent: Carlson, Gaskey & Olds, P.C.

20070297930 - Rotary displacement pump comprising scraper and guide of the scraper: The invention a rotary displacement pump including a stator (42) fixed in a housing (20) a rotor including a shaft portion (8) and a radially protruding web (12) having a configuration of an undulatory disk type; a scraper (110) having an engagement slot (112) of predetermined radial height and predetermined... Agent: Carlson, Gaskey & Olds, P.C.

20070292293 - Fluid machine and scroll compressor: There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor where a... Agent: Birch Stewart Kolasch & Birch

20070292294 - Scroll compressor: There is provided a scroll compressor in which reliability and durability is increased by preventing peeling of a coating layer applied to a thrust plate, to maintain a desired level of lubrication for a long period of time. A scroll compressor 1 comprises a thrust plate 51, a coating which... Agent: Birch Stewart Kolasch & Birch

20070292296 - Bi-directional disc-valve motor and improved valve-seating mechanism therefor: A rotary fluid pressure device (11) has a stationary valve member (17), a rotatable valve member (51), and a valve seating mechanism (73). The valve seating mechanism (73) defines an outer balance ring member (75) having a valve-confronting surface (79) in engagement with an opposite surface (81) of the rotatable... Agent: Eaton Corporation Eaton Center

20070292295 - Rotor with cut-outs: A gerotor device having a rotor and a stator, the rotor including a plurality of teeth defining a profile, each tooth being divided by a tooth axis. At least one tooth includes an inner recess and an outer recess spaced from the inner recess along the profile.... Agent: Fay Sharpe LLP

20070292291 - Vane cell pump: The disclosure relates to a vane cell pump having an external rotor, an internal rotor and a plurality of vanes which are secured in a pivotable manner on the external rotor and which are displacably mounted in a radial manner in the inner rotor, essentially in radial slots. The external... Agent: Brinks Hofer Gilson & Lione

20070292292 - Vane cell pump: The disclosure relates to a vane cell pump having an inner rotor (12) and a plurality of vanes (18) which are secured in a pivotable manner to the external rotor (28) and which are displacably mounted in a radial manner in the inner rotor, essentially in radial slots (16). The... Agent: Brinks Hofer Gilson & Lione

20070292297 - Vane pump consisting a two-part stator: A rotary displacement pump, comprising: (a) a stator (42); (b) a rotor including a shaft portion (8) and a radially protruding web (12) having a configuration of an undulatory disk type; (c) a scraper (110) having an engagement slot (112) of predetermined radial height and predetermined axial width, the engagement... Agent: Carlson, Gaskey & Olds, P.C.

20070286757 - Device for driving a oil pump: A device (1) for driving an oil pump (2) for a transmission of a motor vehicle, having a pump housing (4), a transmission housing (3), a pump shaft (8), and a gear shaft (13), which is in rotationally fixed connection with the pump shaft (8). The gear shaft has a... Agent: Davis & Bujold, P.l.l.c.

20070286758 - Screw compressor seal: A compressor includes a housing and one or more working elements. A muffler is located downstream of the discharge plenum. A centerbody is located in the discharge plenum upstream of the muffler spanning a major portion of a length between a bearing case and the muffler.... Agent: Bachman & Lapointe, P.C.

20070286759 - Floating dam positive displacement pump: A positive displacement pump having a centrally disposed rotor within a housing, the rotor having inwardly and outwardly moving vanes for movement of fluid through the pump. Races in end walls of the housing partly or entirely control movement of the vanes. A dam is movably positioned at the housing's... Agent: Nixon Peabody, LLP

20070280842 - Variable displacement pump: In a variable displacement pump, a first groove always connected to a second hydraulic chamber is provided in a slide surface of a cam ring facing to an end surface of a side plate, and a second a groove always connected to a suction port is provided in the end... Agent: Babcock Ip, PLLC

20070280843 - Rotary compressor: Disclosed is a rotary compressor having two compression capacities. The rotary compressor includes: a driving shaft (13) being rotatable clockwise and counterclockwise, and having an eccentric portion (13a) of a predetermined size; a cylinder (21) forming a predetermined inner volume; a roller (22) installed rotatably on an outer circumference of... Agent: Birch Stewart Kolasch & Birch

20070280844 - Rotary machine and internal combustion engine: The rotary displacement device has a rotating piston and a rotating housing that has a fixed vane. The cylindrical rotor is eccentrically placed in relation to its cylindrical housing. The gas and air flow goes through the hollow-centered shaft via channels in the rotor. The sealing grid in the displacement... Agent: Fasth Law Offices (rolf Fasth)

20070280845 - Vacuum pump: A vacuum pump is provided comprising a pumping mechanism, a drive shaft for driving the pumping mechanism and a gear box connected to the drive shaft for rotating the drive shaft. Pressure control means are provided to define a path to allow fluid to flow from the pumping mechanism to... Agent: The Boc Group, Inc.

20070280846 - Screw compressor: In a screw compressor, a pair of rotors are located in a housing to be rotatable around their rotary axes to form in the housing a compression chamber in which gas sucked from a suction port of the housing is compressed thereby discharging the compressed gas from a discharge port... Agent: Posz Law Group, PLC