Class / Patent application number | Description | Number of patent applications / Date published |
418178000 | WITH WEAR SURFACE TREATMENT OR INTEGRALLY PLATED WEAR LAYER | 10 |
20080247896 | Fluoropolymer-containing films for use with positive-displacement fluid pumps - A positive-displacement pump comprising a housing, a rotatable component disposed at least partially within the housing, and a film disposed at least partially between the housing and the rotatable component, where the film comprises a reinforcing material and a fluoropolymer material. | 10-09-2008 |
20090098002 | PROCESS FOR HARDFACING A METAL BODY - A method of hardfacing a metal body, including the steps of flame spraying a metallic material onto a surface of the metal body to produce a layer of the metallic material on the metal body and fusing the layer of metallic material to provide a hardfacing layer, is improved by roughening the surface of the metal body prior to the step of flame spraying to provide a mechanical bond between the metal body and the hardfacing layer. The roughening is carried out to achieve a surface roughness adjusted to the thickness of the hardcoating. The surface roughness is preferably 40%-90% of the thickness of the hardfacing layer. A rotor for a progressing cavity pump/motor, including a metallic rotor body having a surface, and a layer of hardfacing on the surface, the hardfacing comprising of fused flame sprayed metallic material, the surface of the rotor body having an average surface roughness of at least substantially 6 mils with irregular protrusions for providing a mechanical bond between the rotor body and the hardfacing. | 04-16-2009 |
20090136374 | Vane Pump - Provided is a vane pump. In the vane pump, a high-hardness main coating layer is provided on a distal end portion of each vane, and an intermediate coating layer having an intermediate hardness between a hardness of a base material of the vane and a hardness of the main coating layer is provided between the base material of the vane and the main coating layer. | 05-28-2009 |
20110052439 | REFRIGERANT COMPRESSOR AND REFRIGERATING CYCLE DEVICE - A refrigerant compressor includes a first layer ( | 03-03-2011 |
20110206550 | Vane for a single-vane vacuum pump - The invention relates to a vane for a vane pump, in particular a vane vacuum pump, having a crucible-shaped housing and provided with a rotor mounted eccentrically and rotatably in the housing, wherein the vane is displaceably mounted perpendicular to the axis of rotation in the rotor and the free ends thereof are in contact with the interior circumferential surface of the housing, wherein the vane has a closed surface, at least in the sections protruding beyond the rotor, in the direction of the interior circumferential surface, and the surface is formed by an exterior wall, which is provided with a coating, wherein the coating is provided with perforations in the area located inside the rotor. | 08-25-2011 |
20120087822 | COMPRESSOR - A compressor, characterized in that a steel is used as the base material for the other sliding material vane | 04-12-2012 |
20130149182 | Reinforced Stators and Fabrication Methods - A stator for a progressive cavity pump or motor comprises a tubular housing having a central axis. In addition, the stator comprises a stator insert coaxially disposed within the housing. The stator insert has a radially outer surface that engages the housing and a radially inner surface defining a helical-shaped through bore extending axially through the stator insert. The stator insert includes an insert body and an insert liner attached to the insert body. The insert body is radially positioned between the housing and the insert liner. The insert body comprises a reinforcement structure and a plurality of voids dispersed within the reinforcement structure. | 06-13-2013 |
20140178235 | ELECTROFORMED STATOR TUBE FOR A PROGRESSING CAVITY APPARATUS - A method for use in producing a stator for a progressing cavity apparatus which includes the use of electroforming to produce the stator tube. A stator tube for a progressing cavity apparatus which is produced using electroforming and a stator for a progressing cavity apparatus which includes a stator tube produced using electroforming. | 06-26-2014 |
20150292101 | METHOD FOR COATING A SLIDING SURFACE OF A TROCHOID HOUSING IN A ROTARY ENGINE AND TROCHOID HOUSING COMPRISING A COATED SLIDING SURFACE - The invention relates to a method for coating a running surface ( | 10-15-2015 |
20160047377 | POSITIVE DISPLACEMENT GEAR PUMP - A positive displacement pump has a casing with a central body and two closing lids, the central body being provided with two cylindrical communicating chambers, one suction pipe and one discharge pipe, and two rotors revolvingly mounted in the chambers of the central body and supported by shafts revolvingly mounted in the closing lids. The two rotors include a male rotor having only protuberances, not cavities, and a female rotor having only cavities, not teeth or protuberances. | 02-18-2016 |