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公开(公告)号：US12060882B2
公开(公告)日：2024-08-13
申请号：US17914904
申请日：2021-03-26
发明人： Simon Cargill
CPC分类号： F04C2/123 , F04C2/126 , F04C15/0026 , F04C15/0073 , F04C2230/60 , F04C2230/604
摘要： A rotary positive displacement pump includes a main body rotationally supporting two parallel, axially extending, shafts with gears in constant mesh condition, such that the shafts rotate in opposite directions. A rotor case body is connected to a front side of the main body and has a stationary interior pumping cavity, fluid product inlet and outlet openings, and two cylindrical rotor case hubs each receiving internally one of the shafts. A pair of rotors each have a rotor wing and a rotor drive element that is mounted torque proof on a rotor seat at an end region of one of the shafts. Each rotor seat pair has an axial abutment surface and a mounting surface. The pump also includes fasteners each engaging a mating section of one of the shafts and exerting an axial clamping force on one of the rotor drive elements against one of the axial abutment surfaces.
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公开(公告)号：US12060881B2
公开(公告)日：2024-08-13
申请号：US17525133
申请日：2021-11-12
CPC分类号： F04C18/126 , F04C25/00 , F04C29/0035 , F04C29/06 , F04C2240/20
摘要： A positive displacement roots blower can include a housing having an inlet structured to receive an incoming flow of a fluid, an outlet structured to receive an outgoing flow of the fluid, and a passage. The positive displacement roots blower can also include a pair of intermeshed rotating members supported for complementary rotation within the housing, where the rotating members and the housing form respective operating volumes there between which rotate with the rotating members. Each of the respective operating volumes has the following regions: (1) open to inlet/closed to outlet; (2) closed to inlet/closed to outlet; and (3) closed to inlet/open to outlet. The passage includes a restriction and connects to at least one of the operating volumes when the at least one of the respective operating volumes is in region (2). The restriction can be a venturi feedback connecting to the outlet.
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公开(公告)号：US12025124B2
公开(公告)日：2024-07-02
申请号：US17697928
申请日：2022-03-18
发明人： Nan Wu , Nguyen Thi Thanh Tam
CPC分类号： F04C15/06 , F01C21/10 , F04C2/086 , F04C2/102 , F04C15/0026 , F04C15/0061 , F04C2240/30 , F04C2240/40
摘要： An electric pump includes a motor unit rotationally driving a drive shaft, and a pump unit. The pump unit includes a pump rotor that sends the fluid by a driving force of the driving shaft, and a pump housing that covers at least one side of the pump rotor. The pump housing includes an attachment surface extending in the axial direction and in contact with an attached body, first and second flow paths respectively on the suction side and the discharge side, and a partition wall positioned between pump-side openings of the first flow path and the second flow path facing the pump rotor, and extends in a direction along the attachment surface, and locations of attachment-side openings of the first flow path and the second flow path on the attachment surface are displaced from each other on the attachment surface in the axial direction.
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公开(公告)号：US12018688B2
公开(公告)日：2024-06-25
申请号：US18094427
申请日：2023-01-09
CPC分类号： F04C2/1075 , F04C15/0019 , F04C11/001 , F04C11/008 , F04C2270/12
摘要： A sealing assembly for a progressive cavity pump and a progressive cavity pump assembly having a retaining sleeve, a ring, and an elastic diaphragm terminating in a first end of the diaphragm in a first opening, and in a second end of the diaphragm, opposite the first end, in a second opening larger than the first opening. The second opening is held in contact with the retaining sleeve by the ring, and the first opening is configured to grip a rotor of the progressive cavity pump, and the ring is configured to hold the second opening fixed with respect to a stator of the progressive cavity pump.
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公开(公告)号：US11988209B2
公开(公告)日：2024-05-21
申请号：US17541667
申请日：2021-12-03
CPC分类号： F04C2/16 , F02C7/22 , F04C13/00 , F04C15/0026 , F04C15/0057 , F04C2240/50
摘要： A gear pump includes a pair of gears having meshed teeth. One of the gears is configured for connection to a source of drive. The gears are received within a housing. The housing has an inlet port configured for connection to a source of fluid and an outlet port. Each of the gears have a shaft rotating within the housing on a bearing on each axial side of each gear. At least one of the bearings associated with each of the pair of gears has a plurality of springs received in recesses to bias the said at least one bearing against an end face of a respective one of the pair of gears. A retention plate holds each of the plurality springs. A method of assembly is also disclosed.
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公开(公告)号：US11976659B2
公开(公告)日：2024-05-07
申请号：US17974116
申请日：2022-10-26
申请人： Joe Dick Rector
CPC分类号： F04C2/126 , F04C2/084 , F04C2/088 , F04C14/24 , F04C15/0057 , F04C2240/30
摘要： A rotary, self-priming, positive displacement pump is described. The pump may include a pump housing including an inlet and an outlet, a pump chamber including an upper wall, a lateral wall, and a floor, first and second rotary impellers in the pump chamber, and a pair of gears each secured to the first and second rotary impellers, and a pressure relief feature operable to relieve pressure developing in a relatively high pressure zone of the pump chamber. The gears mesh with each other to ensure that the vanes do not contact one another during rotation. The pressure relief feature may comprise one or more channels formed in the pump housing and/or the first and second rotary impellers. The channels connect the high pressure zone with another zone to redistribute pressure. The channels may include one continuous channel or alternatively, a plurality of unconnected channels.
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公开(公告)号：US11976657B2
公开(公告)日：2024-05-07
申请号：US17425489
申请日：2019-02-13
发明人： Kazuhiko Baba
CPC分类号： F04C18/3564 , F04B39/0094 , F04C18/356 , F04C29/0071 , F04C29/0078 , F04C23/008 , F04C2240/56 , F04C2240/60
摘要： A compressor includes a motor, a compression mechanism portion driven by the motor, and a rotation shaft connecting the motor and the compression mechanism portion. At least a part of the rotation shaft is composed of a material having a higher Young's modulus than that of cast iron, and having a higher thermal conductivity than that of cast iron.
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公开(公告)号：US11879462B2
公开(公告)日：2024-01-23
申请号：US17787931
申请日：2020-06-04
申请人： Hyuk Beom Yoon
发明人： Hyuk Beom Yoon
CPC分类号： F04C2/1073 , F04C2/1071 , F04C15/0061 , F04C2240/50
摘要： The present invention relates to a Moineau pump-type quantitative liquid-discharging apparatus including a stator in which a slot hole is formed, a main shaft including a first shaft part and a second shaft part, which are eccentric with respect to each other, and a rotor which extends from the first shaft part and is inserted into the slot hole, first and second slide bearings to which the first shaft part and the second shaft part are rotatably coupled, respectively, and first and second sliders which guide the first and second slide bearings to move in directions to cross each other, wherein the movement directions of the first and second slide bearings are perpendicular to an extension direction of the rotor.
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公开(公告)号：US11739750B2
公开(公告)日：2023-08-29
申请号：US17624741
申请日：2020-07-20
CPC分类号： F04C2/101 , F04C15/0061 , F04C15/06 , F04C2240/50
摘要： An internal gear pump comprising: a ring with internal teeth delimiting a cavity and a gear disposed in the cavity, the gear comprising external teeth cooperating with the internal teeth to drive the ring in rotation, remarkable in that it comprises a pinion disposed in the cavity and driving the gear in rotation. The pinion cooperates with the external toothing of the gear. In an alternative embodiment, the gear comprises an internal toothing which cooperates with the pinion.
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公开(公告)号：US11686308B2
公开(公告)日：2023-06-27
申请号：US17292675
申请日：2019-11-08
申请人： ELGI EQUIPMENTS LTD
发明人： Jairam Varadaraj , Venu Madhav Kuppachi , Shinu Kizakkumpat , Sundaranathan Ramanathan , Jerrin Paul
CPC分类号： F04C18/16 , F04C27/009 , F04C29/02 , F04C29/042 , F04C2240/52 , F04C2240/809
摘要： An oil-free water-injected screw air compressor comprises a housing that encloses two rotors for generating compressed air, and an air water separator for separating the water from the compressed air. Water injection can effectively cool a compressor, and some embodiments provide a sealing system for isolation of compressor bearing lubricant from water used for cooling.
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