Rotary expansible chamber devices inventions 02/08

20080050259 - Highly reinforced elastomer for use in downhole stators: A Moineau stator for a downhole drilling motor and a method for fabricating the stator are disclosed. The stator includes an internal helical cavity component fabricated from an improved elastomeric material formulated to provide both high resilience and good processability. For example, in one exemplary embodiment the elastomer material includes... Agent: W-h Energy Services, Inc.

20080050260 - Scroll compressor: A scroll compressor is disclosed. A plurality of grooves (85) communicating with each other are formed on a sliding surface of a thrust bearing (53) subjected to the axial force received by a movable scroll (32). The areas surrounded by the plurality of the grooves (85) make up a plurality... Agent: Posz Law Group, PLC

20080050257 - Oil free screw compressor: The invention downsizes and simplifies structures of a compressor and its driving system apparatus, and achieves a reduction of a noise. An oil free screw compressor is constituted by compressor main bodies compressing a gas, a motor driving rotors of the compressor main bodies via step-up gears, a gear casing... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080050258 - Orbital engine: The present disclosure includes an engine having a torodial piston chamber, at least one piston positioned in the torodial piston chamber, and at least one engine valve positioned to interact with the torodial piston chamber.... Agent: Baker & Daniels LLP

20080050261 - Contacting bearing protector: A contacting seal device provides a seal between equipment housing and an equipment shaft. The contacting seal device includes a stator that can be sealed to the equipment housing by a first torroidal sealing member, a first rotor that can be sealed to the equipment shaft by a second torroidal... Agent: Edwin D. Schindler

20080050262 - Rotary pump having a valve rotor and one or more vane rotors and methods for pumping fluids: A rotary pump includes a valve rotor and one or more vane rotors positioned around it. Each vane rotor has a vane that engages a slot in the valve rotor as the vane rotor rotates. A housing around the valve rotor and the vane rotor(s) defines a generally constant-radius pump... Agent: Lathrop & Clark LLP

20080044305 - Sealed-type rotary compressor and refrigerating cycle device: A sealed-type rotary compressor includes a rotary drive unit and a compression mechanism coupled via a rotary shaft pivotally supported by a main bearing and a sub-bearing, and roller bearings. In the compressor, there are provided an oil filler opening which is provided to the rotary shaft along its center... Agent: Dla Piper US LLP

20080044304 - Screw pump: A screw pump includes a housing and a pair of intermeshing screw rotors. The housing has an inlet port and an outlet port. Each rotor has a first portion whose lead angle decreases. The first portion and the housing form an inlet space and a pump space. Winding angle of... Agent: Steven F. Meyer Morgan & Finnegan, L.L.P.

20080044306 - Device-operating module: The rotary-piston machine consists of two operating units. The first one comprises a horizontal operating cylinder (1) with cylindrical shaft (5), connected to the main shaft (4) and sealed with rings to the walls of the cylinder (1). The shaft (5) has a first friction element (9) pressed against the... Agent: Anthony R. Barkume

20080044307 - Compact helical compressor for mobile use in a vehicle: A compact helical compressor system for mobile use in vehicles is described. The system includes a helical compressor unit, a motor unit dedicated to the helical compressor unit for driving the helical compressor unit, and a control unit for adjusting a rotational speed of the motor unit and to generate... Agent: Crowell & Moring LLP Intellectual Property Group

20080044308 - Gear pump: A casing with housing space for retaining a first gear and a second gear in a condition where the tooth tips and both side surfaces slide, comprises a main casing which retains the first gear in a manner which allows rotation but restricts movement in the axial direction, and a... Agent: Greenblum & Bernstein, P.L.C

20080038132 - Rotary dry vacuum pump: Conventionally, when a canned motor is used in the drive part of a rotary dry vacuum pump, there is found a problem that reaction produced gas flows into the interior of the canned motor to thereby break down the canned motor and thus the rotary dry vacuum pump. To solve... Agent: Akin Gump Strauss Hauer & Feld L.L.P.

20080038133 - Scroll compressor: A back pressure chamber 12 provided on a back surface of an orbiting scroll 5 is divided into an inner region 12a and an outer region 12b by an annular seal 11. A diameter d of the annular seal 11 is set 0.5 times or more of a diameter D... Agent: Kratz, Quintos & Hanson, LLP

20080038135 - Corrosion resistant hydraulic motor: A corrosion resistant hydraulic motor includes a housing, an output shaft extending through an opening in the housing, a sealing member contacting the output shaft and a water proof coating disposed on an exterior surface of the housing and on the sealing member. The sealing member is configured to cooperate... Agent: Fay Sharpe LLP

20080038134 - Scroll compressor: A scroll compressor has a moving scroll and a stationary scroll in contact with each other. A seal ring for defining a back pressure space at a rear side of the stationary scroll is provided and its position is adjusted between a sealing position and a leakage position with respect... Agent: GlobalIPCounselors, LLP

20080038136 - Long life telescoping gear pumps and motors: A telescoping gear pump comprises a bolt, a Bellville washer, a wear plate, a seal housing, a seal spring, a spur gear including a wear lobe, a seal ring and a case drain path, a shaft, a ring gear including a wear lobe, seal ring, and a case drain path,... Agent: Fraser Clemens Martin & Miller LLC

20080038137 - Screw pump: A screw pump includes a housing and a pair of intermeshing screw rotors. An end face of the rotor adjacent to an inlet port of the housing is provided with an inlet opening. Each rotor has a first portion whose lead angle changes. The first portions and the housing cooperate... Agent: Morgan & Finnegan, L.L.P.

20080038138 - Rotary lobe pump: A rotary lobe pump comprises a pump body having a driving means and an outer casing, and an insert that can be replaced. The replaceable insert comprises a housing formed of a plastic material and having an inlet port, an outlet port and internal surfaces defining a pumping chamber. The... Agent: Leon D. Rosen Freilich, Hornbaker & Rosen

20080031760 - Gerotor pump: A gerotor pump includes an outer rotor having a first toothed surface and lobes that extend inwards. An inner rotor is eccentrically aligned relative to the outer rotor and includes a second toothed surface and lobes that extend outwards. Planetary gears are located between the outer rotor and the inner... Agent: Carlson, Gaskey & Olds, P.C.

20080031759 - Hydraulic rotary motor: A hydraulic rotary motor, in particular to a stewing gear for elevating plant such as excavator grabs, etc., comprising a housing in which a rotor is rotatably received as well as a ring piston having an inner toothed arrangement and an outer toothed arrangement which is seated between the rotor... Agent: Peters Verny , L.L.P.

20080031756 - Capacity variable type twin rotary compressor and driving method thereof and airconditioner with this and driving method thereof: Disclosed are a capacity variable type twin rotary compressor and a driving method thereof and an air conditioner using the same and a driving method thereof. A vane (124) can quickly and stably maintain contact with a rolling piston (124) even when the vane (124) starts or a compressor switches... Agent: Ked & Associates, LLP

20080031757 - Spherical fluid machines: A rotary fluid machine, such as a pump or motor has a housing with a spherical interior in which primary and secondary vanes rotate with the secondary vane reciprocating between open and closed positions with respect to the primary vane. Improvements to this type of fluid machine are defined to... Agent: Michael A. Ervin

20080031758 - Feed screw for eccentric screw pump: The inventions relates to a feed screw for eccentric screw pumps which, to avoid bridge formation of the medium and optimisation of the drive power, has a screw, which in the axial region, has perforations and webs.... Agent: St.onge Steward Johnston & Reens LLC

20080031761 - Cooling of pump rotors: A rotor for a screw vacuum pump has a threaded body in which a central cavity is formed. A coolant is supplied to the cavity from a supply line provided in a shaft attached to the body. A coolant flow guide, which may be either separate from or at least... Agent: The Boc Group, Inc.

20080031762 - Screw compressor for extremely high working pressure: On screw compressors for extremely high discharge pressures, e.g. for application in refrigeration systems operating with CO2 in a transcritical process, featuring two rotors, a male rotor and a female rotor having a ratio of male-to-female rotor lobes of 4:6, 5:6 or 5:7, with the male rotor having a drive-shaft... Agent: Horst M. Kasper

20080031763 - Variable capacity pump/motor: A variable capacity pump/motor has a meshing internal and external gear set disposed between an upper mandrel and a lower mandrel, each including a flange extending towards the gears to divide a pump/motor chamber into suction and discharge chambers. The inner gear is fixed and the external gear is axially... Agent: Fraser Clemens Martin & Miller LLC

20080031764 - Compressor: An object is to inhibit a refrigerant leakage and enhance a performance of a compressor. The compressor comprises a driving element stored in a sealed container of the compressor, and a compression element driven by a rotary shaft of the driving element. This compression element comprises a cylinder in which... Agent: Kratz, Quintos & Hanson, LLP