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Rotary expansible chamber devices February patent applications/inventions, industry category 02/10

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.
02/25/2010 > patent applications in patent subcategories.

20100047101 - Scroll compressor with extended profile: A scroll type compressor, according to the invention, comprises first and second scroll members each having an end plate and a scroll wall projecting from the end plate. The scroll members have their scroll walls interleaved with one another to define therebetween a compression chamber and upon relative orbiting movement... Agent: General Motors LLC Legal Staff

20100047102 - Gear pump with reduced pressure pulsations on the pumping side: The invention relates to a gear pump in which the amplitudes of the pressure impulses in a pressure chamber can be significantly reduced by a suitable embodiment of a first groove and/or a second groove. The circumferential walls of a pump chamber containing the pressure chamber, in an angular range... Agent: Ronald E. Greigg Greigg & Greigg P.l.l.c.

20100047103 - Integral slide valve relief valve: Various embodiments of the invention provide a screw compressor for compressing a refrigerant in a refrigeration system. The screw compressor includes a rotor case, which accommodates a primary helical rotor that is intermeshed with at least one secondary helical rotor, to compress the refrigerant in the rotor case. The rotor... Agent: Bachman & Lapointe, P.C. (utc)

20100047104 - Fluid machine: A housing (2) of a Roots pump (1) supports a drive shaft (3) and a driven shaft (4) with radial bearings (32, 33) so as to be rotatable. The housing (2) is formed by joining an upper housing member (20) to a lower housing member (10). The lower housing member... Agent: Woodcock Washburn LLP

02/18/2010 > patent applications in patent subcategories.

20100040498 - Rotor drive mechanism, eccentric shaft sealing structure, and pump apparatus: A pump apparatus (39) includes: a first rotor drive mechanism (41) configured to transfer rotation of an input shaft portion (50) to an output shaft portion (49) coupled to an external screw type rotor (23) of a uniaxial eccentric screw pump (21), the input shaft portion (50) being rotated with... Agent: Alleman Hall Mccoy Russell & Tuttle LLP

20100040499 - Screw pump rotors and ring seals for screw pump rotors: A pump rotor for a screw pump, comprising a shaft, a thread on the shaft, the thread comprising a groove disposed on an outer surface thereof, and a seal disposed in the groove. The seal and the groove are configured to retain the seal in the groove while allowing radial... Agent: General Electric Company Global Research

02/11/2010 > patent applications in patent subcategories.

20100034680 - Rotary piston machine: An electrically driven rotary piston machine which operates as a rotary piston pump or rotary piston compressor wherein the rotary piston machine has a basic housing, which holds an electrical coil and pump head, wherein the pump working space is preferably bounded by a trochoid toothing of the rotors. The... Agent: Jordan And Hamburg LLP

20100034681 - Variable capacity vane pump: A variable capacity vane pump (100) has a pump housing (10) having a high-load bearing part (10a) on which a higher load is exerted than another part when the pump vane pump (100) operates. A control valve (21) for varying a capacity of the vane pump (100) is provided in... Agent: Rabin & Berdo, PC

20100034682 - Scroll compressor with two scrolls: A scroll compressor for compressible fluids includes a fixed housing having a spiral-shaped feed chamber which contains a working fluid. A displacement member interacts with the feed chamber and includes a driveshaft which is supported in the housing and has an eccentric disk, a carrier disk which is mounted on... Agent: Henry M Feiereisen, LLC Henry M Feiereisen

20100034683 - Compressor with built-in oil separator: A compressor with a built-in centrifugal oil separator is characterized in that the oil separator is formed between a first member and a second member constituting a compressor by the coupled structure of the first member and the second member. In the compressor, by simplifying the structure of the oil... Agent: Baker Botts LLP C/o Intellectual Property Department

20100034684 - Method for lubricating screw expanders and system for controlling lubrication: A method for lubricating a screw expander includes condensing a mixture of working fluid and lubricant fed from the screw expander, through a condenser. At least a portion of the mixture of working fluid and lubricant fed from the condenser is pressurized from a first pressure to a second pressure... Agent: General Electric Company Global Research

20100034685 - Seal for a rotary vane pump: A pump includes a housing and a shaft rotatable about an axis. The shaft has a shaft diameter and has a portion disposed within the housing. A plurality of retractable vanes is coupled to the shaft and each vane includes a first end that contacts the housing. A seal element... Agent: Michael Best & Friedrich LLP

02/04/2010 > patent applications in patent subcategories.

20100028181 - Vane pump for pumping hydraulic fluid: A vane pump of the intravane type for pumping hydraulic fluid, wherein each vane of the pump has two intravanes and that pressurized oil is provided to one or both intravane regions when the vane is in a rise region of the pump. The pump is operated such that the... Agent: Winston & Strawn LLP Patent Department

20100028182 - Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports: A scroll compressor is provided with some capacity reduction technique such as a bypass port. The electric motor for driving the scroll compressor is not an induction motor, but rather a line fed permanent magnet synchronous motor is utilized. Such motors have a higher overall efficiency, and thus will be... Agent: Theodore W. Olds

20100028183 - Valve assembly for scroll compressor: A scroll compressor has a reed valve mounted on a central discharge port. The reed valve has a valve portion at a first end and a pin holding the reed valve onto a non-orbiting scroll member at a second end. The reed valve extends along a plane which is non-perpendicular... Agent: Carlson, Gaskey & Olds, P.C.

20100028185 - Scroll fluid machine: A scroll fluid machine comprises a fixed-side member including a cylindrical casing and a fixed scroll fixed to the casing, and an orbiting scroll and a plurality of ball coupling devices provided between the fixed-side member and the orbiting scroll to prevent self-rotation of the orbiting scroll on its axis... Agent: Crowell & Moring LLP Intellectual Property Group

20100028184 - Temperature protection switch biased against scroll compressor shell: A sealed compressor is provided with a temperature sensor biased against an outer surface of its shell. By biasing the temperature sensor against the shell, good contact between the temperature sensor and the shell is ensured. Also by use of molded material around the senor, the sensor is insulated from... Agent: Theodore W. Olds

20100028186 - Hydraulic machine: A hydraulic machine is disclosed with an externally toothed gear wheel (3) and an internally toothed ring, the gear wheel (3) and the ring together forming pressure pockets, which expand and compress during operation, the gear wheel (3) having recesses (22-25), which form part of a secondary control system. The... Agent: Mccormick, Paulding & Huber LLP

20100028187 - Supplement lubricant free pneumatic motor: The present invention provides a pneumatic motor having a motor body having an air inlet and an air outlet, at least one rotor mounted in a chamber of the motor body and adapted to be driven by compressed air fed into the air inlet and an adhesive lubricant applied to... Agent: Fitch Even Tabin & Flannery

20100028188 - Low speed, high torque rotary abutment motor: An improved high torque rotary abutment motor is provided that is capable of producing ultra high pressures, while still remaining light weight an reliably efficient. The rotary abutment motor is provided with a body and rotor are sealed in the axial direction with two face spring seals compensating for tolerance... Agent: Patent, Copyright & Trademark Law Group

20100028189 - rotary pump with vanes: A rotary pump includes a stator having a chamber delimited by a circumferential wall, a cylindrical rotor tangent to the circumferential wall of the chamber and suitable for being driven in rotation around an axis eccentric with respect to the chamber, and at least a vane diametrically traversing the rotor... Agent: Young & Thompson

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