Rotary expansible chamber devices inventions 06/07

20070148029 - Variable displacement vane pump: A variable displacement vane pump, including a pump body, a driving shaft, a rotor, a cam ring swingable around a swing fulcrum, first and second support members on opposite axial sides of the cam ring, a suction port and a discharge port disposed on at least one of the support... Agent: Foley And Lardner LLP Suite 500

20070148028 - Proximity-sensor support, a compressor, a valve plate and a cooler: One describes a support for a proximity sensor to sense the proximity of a piston of a compressor, a compressor proper, a valve plate of a compressor and a cooler provided with these pieces of equipment. One of the objectives of the present invention is achieved by means of a... Agent: Alston & Bird LLP

20070148030 - Roots type fluid machine: A roots type fluid machine includes a housing, a pair of parallel rotary shafts and two-lobe rotors. Each rotor includes two lobe portions and two well portions. Each lobe portion has a profile of convex arc with a radius R and each well portion has a profile of concave arc... Agent: Woodcock Washburn LLP

20070140881 - Multistage compression type rotary compressor: An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having... Agent: Armstrong, Kratz, Quintos, Hanson & Brooks, LLP

20070140882 - Eccentric screw pump equipped with erosion-resistant rotor: An eccentric screw pump or an eccentric screw motor has a rotor formed from at least a tubular jacket with at least two layers. The outer layer of the jacket consists of a material that is abrasion-resistant and/or corrosion-resistant.... Agent: Leydig Voit & Mayer, Ltd

20070140883 - Progressive cavity pump/motor stator, and apparatus and method to manufacture same by electrochemical machining: Electrochemical machining is used to generate the helical lobe profiles of the stator of a progressive cavity pump or motor. A thin, elastomeric liner, of uniform thickness is bonded either to the interior of the stator, or to the exterior of the rotor. Where the elastomeric liner is to be... Agent: Baker & Hostetler LLP

20070140884 - Scroll compressor: A scroll compressor includes a fixed scroll, an orbiting scroll orbiting the fixed scroll to perform compression on a refrigerant, a discharge cover provided at an upper end of the fixed scroll and guiding discharge of a compressed refrigerant, a first discharge chamber from which the compressed refrigerant is discharged;... Agent: Greenblum & Bernstein, P.L.C

20070140885 - Scroll compressor: A scroll-type compressor includes a compression unit, a main frame supporting the compression unit, and a driving shaft having an oil supply path. The oil supply path is located eccentrically with the driving shaft and an upper part of the driving shaft is supported by the main frame. The compressor... Agent: Ked & Associates, LLP

20070140886 - Fluid pump assembly: A fluid pump assembly comprises a pump housing and a fluid pump disposed within the pump housing. The fluid pump has axially opposite first and second side faces and includes cooperating impeller and rotor members. The fluid pump assembly further comprises inlet and outlet ports disposed adjacent to the first... Agent: Berenato, White & Stavish

20070140887 - Method for imparting residual compressive stress in metal parts: A method of hardening metal parts, such as a rotor or drive link, and parts thus produced. Preferably the method includes imparting residual compressive stresses into the metal parts and uses various small ball type structures to create small compressions in the surfaces of the metal parts. The compressions apply... Agent: Fay Sharpe LLP

20070140888 - Compressor: In sealed compressors, in one form of the invention, the compressor housing and the compression mechanism are assembled to one another without fasteners. As a result, the time required to install and tighten the fasteners is eliminated, lessen the time required to assemble the compressor. Further, such a fastenerless assembly... Agent: Baker & Daniels LLP 111 E. Wayne Street

20070140889 - Flow passage structure for refrigerant compressor: A flow passage structure can be disposed in a multi-stage centrifugal refrigerant compressor having a deswirl vane and a return channel bend. The flow passage structure includes a two-way flow passage having a first outlet and a second outlet, for diverging externally injected refrigerant; a first side discharge flow passage... Agent: Rabin & Berdo, PC

20070134118 - Oil pump for a compressor: An oil pump for a compressor is provided. The oil pump includes a pump body, a driving shaft coupled to the pump body, with a supply passage extending therethrough, and a plurality of pumping members which rotate with the driving shaft. Fluids such as oil are inhaled into the pump... Agent: Ked & Associates, LLP

20070134117 - Scroll type compressor with an enhanced sealing arrangement: A scroll type compressor with an enhanced sealing arrangement includes two sealing rings, mounted one between a first part of a gliding block and a first chamber of a fixed scroll and another one between a second part of the gliding block and a second chamber of the fixed scroll,... Agent: Birch Stewart Kolasch & Birch

20070134119 - Hydraulic machine: To keep the wear of the machine small each pocket (8) has at least two different radii (R1, R2, Rn) whereby a radius (R2, Rn) at a smaller displacement from the edge (12) of the pocket is larger than a radius (R1) at a larger displacement from the same edge... Agent: Mccormick, Paulding & Huber LLP

20070134120 - Vane pump: A vane pump according to the present invention is characterized in that a position of a first suction port located in the forward rotation direction of a rotor is brought closer to a suction port than a position of a second suction port located in the backward rotation direction of... Agent: Michael L. Crapenhoft C/o Hiroe And Associates

20070134121 - Screw pump: A pump including at least three rotors each being provided with a generally helical screw thread, the rotors being mounted for rotation in a housing such that the screw threads of the rotors mesh and rotation of one rotor causes rotation of the other rotor, wherein the pitch of the... Agent: Dykema Gossett PLLC

20070134122 - Hydraulic pump: A hydraulic pump includes an outer housing unit formed with a fluid-moving chamber and a pressure relief passage. The fluid-moving chamber has a fluid entrance portion and a fluid exit portion. The pressure relief passage has an inlet communicated with the fluid exit portion, and an outlet communicated with a... Agent: Christie, Parker & Hale, LLP

20070128062 - Eccentric screw pump having conical sealing surfaces: The aim of the invention is to improve the sealing possibilities between the elastic stator lining and corresponding connecting flanges of eccentric screw pumps. In order to increase the sealing surfaces, the stator lining comprises, at least at one of its ends, a conical sealing surface which may be provided... Agent: St. Onge Steward Johnston & Reens, LLC

20070128063 - Rotating piston machine: The invention relates to a rotating piston machine, especially a compressor, a pump or a motor, comprising a rotating piston which defines working chambers with variable volumes and is located in a cylinder (1) provided with two lateral walls and a curved jacket. Said piston can be rotated about two... Agent: Blank Rome LLP

20070128064 - Meshing surfaces for intersecting vanes: The invention provides a toroidal intersecting vane machine incorporating intersecting rotors to form primary and secondary chambers whose porting configurations minimize friction and maximize efficiency. Specifically, it is an object of the invention to provide a toroidal intersecting vane machine that greatly reduces the frictional losses through meshing surfaces without... Agent: Elmore Patent Law Group, PC

20070128065 - Pump: A pump, for example, a vane-cell pump or a roll-cell pump, especially a gear pump, includes a two-stroke pump contour which includes at least one rise zone, at least one large circular area, at least one fall zone and at least one small circular area. The pump includes a rotor... Agent: Davidson, Davidson & Kappel, LLC