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公开(公告)号：US20200173444A1
公开(公告)日：2020-06-04
申请号：US16631630
申请日：2018-02-28
Applicant: Edwards Limited
Inventor： William Foote , Stephen Dowdeswell , David Bedwell , Simon Stevens
Abstract: A heat exchanger for changing a temperature of a pumped gas flow and a pump comprising the heat exchanger is disclosed. The heat exchanger comprises: at least one tube configured to contain a flow of fluid; said at least one tube being at least partially embedded within a block of material; wherein said heat exchanger comprises mounting means configured to mount said heat exchanger adjacent to a gas port of a pump such that a least a portion of said heat exchanger extends into a path for gas flow flowing through said gas port; wherein the mounting means comprises a flange, the flange being configured to connect with the gas port of the pump, the block being mounted to the flange such that the block extends towards the rotor of the pump when the flange is connected with the gas port of the pump.
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公开(公告)号：US12258963B2
公开(公告)日：2025-03-25
申请号：US18251484
申请日：2021-10-28
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , David Bedwell , Nigel Paul Schofield
Abstract: A scroll pump includes an inlet and an outlet, a fixed scroll and an orbiting scroll intermeshed with each other, wherein the fixed scroll and orbiting scroll define a space therebetween. The scroll pump further includes a biasing apparatus configured to bias the orbiting scroll against the fixed scroll, a fluid recirculation channel which extends from the space to the inlet through either the fixed scroll or the orbiting scroll, and a fluid recirculation valve disposed in the fluid recirculation channel. The fluid recirculation valve is configured to permit flow of fluid from the space to the inlet through the fluid recirculation channel or to block flow of fluid through the fluid recirculation channel. The fluid recirculation valve is configured to switch from a closed state to an open state when a pressure differential across the fluid recirculation valve is equal to or exceeds a certain threshold value.
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公开(公告)号：US11821427B2
公开(公告)日：2023-11-21
申请号：US17760408
申请日：2021-02-10
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , David Bedwell
CPC classification number: F04C23/001 , F01C21/10 , F04C18/126 , F04C25/02 , F04C29/0014 , F04C2220/50 , F04C2240/10 , F04C2250/30 , F04C2280/04
Abstract: A multi-stage vacuum pump comprising a stator defining multiple pumping chambers is discussed. The stator comprises a plurality of transfer channels for providing a fluid passage from an outlet port of one of the plurality of pumping chambers to an inlet port of a subsequent pumping chamber. Some of the transfer channels comprise two side channel sections on opposing sides of the stator. One of the transfer channels comprises a single side channel section on one side of the stator. The vacuum pump further comprises a gas ballast inlet channel arranged on an other side of the stator to the one side of the stator.
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公开(公告)号：US20230076739A1
公开(公告)日：2023-03-09
申请号：US17760408
申请日：2021-02-10
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , David Bedwell
Abstract: A multi-stage vacuum pump comprising a stator defining multiple pumping chambers is discussed. The stator comprises a plurality of transfer channels for providing a fluid passage from an outlet port of one of the plurality of pumping chambers to an inlet port of a subsequent pumping chamber. Some of the transfer channels comprise two side channel sections on opposing sides of the stator. One of the transfer channels comprises a single side channel section on one side of the stator. The vacuum pump further comprises a gas ballast inlet channel arranged on an other side of the stator to the one side of the stator.
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公开(公告)号：US20250109747A1
公开(公告)日：2025-04-03
申请号：US18834464
申请日：2023-03-30
Applicant: Edwards Limited
Inventor： Nigel Paul Schofield , Alan Ernest Kinnaird Holbrook , David Bedwell
Abstract: A non-contacting scroll pump, the non-contacting scroll pump comprising a housing, an orbiting scroll located within the housing, and a thrust bearing assembly located within the housing for axially supporting the orbiting scroll. The thrust bearing assembly comprises a first plate fixed to the orbiting scroll, a second plate spaced apart from the first plate, a ball bearing located between the first plate and the second plate, the ball bearing being configured to roll against the first and second plates during orbiting of the orbiting scroll, and a coupling structure extending axially between the housing and the second plate to couple the housing to the second plate, wherein the coupling structure is engaged with the second plate, and wherein the coupling structure comprises a spring arranged to push the coupling structure against the second plate.
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Patent Agency Ranking
公开(公告)号：US12173707B2
公开(公告)日：2024-12-24
申请号：US17606277
申请日：2020-04-24
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , Nigel Paul Schofield , David Bedwell
Abstract: The Invention provides a scroll pump comprising an orbiting scroll and a fixed scroll, wherein the orbital axis of the orbiting scroll is movable in a radial direction relative to the fixed scroll while the orbiting scroll is orbiting about its orbital axis, or wherein the fixed scroll is movable relative to the orbiting scroll in a radial direction while the orbiting scroll is orbiting about its orbital axis.
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公开(公告)号：US11255326B2
公开(公告)日：2022-02-22
申请号：US16480103
申请日：2018-01-11
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , David Bedwell
Abstract: A pump includes a first housing part defining a first portion of a bore extending within the first housing part and shaped to receive a rotor; and a second housing part defining a second portion of the bore extending within the second housing part and shaped to receive the rotor. The first housing part has a first face abutable against an opposing second face of the second housing part to position the first portion of the bore with the second portion of the bore to receive the rotor. The first portion of the bore has a first circular cross-section portion centered along the first face and the second portion of the bore having a second circular cross-section portion centered, within the second housing part, at a distance from the second face.
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公开(公告)号：US20240018960A1
公开(公告)日：2024-01-18
申请号：US18251484
申请日：2021-10-28
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , David Bedwell , Nigel Paul Schofield
CPC classification number: F04C18/0215 , F04C18/0292 , F04C29/12 , F04C27/005 , F04C28/24 , F04C29/0021
Abstract: A scroll pump includes an inlet and an outlet, a fixed scroll and an orbiting scroll intermeshed with each other, wherein the fixed scroll and orbiting scroll define a space therebetween. The scroll pump further includes a biasing apparatus configured to bias the orbiting scroll against the fixed scroll, a fluid recirculation channel which extends from the space to the inlet through either the fixed scroll or the orbiting scroll, and a fluid recirculation valve disposed in the fluid recirculation channel. The fluid recirculation valve is configured to permit flow of fluid from the space to the inlet through the fluid recirculation channel or to block flow of fluid through the fluid recirculation channel. The fluid recirculation valve is configured to switch from a closed state to an open state when a pressure differential across the fluid recirculation valve is equal to or exceeds a certain threshold value.
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公开(公告)号：US11841021B2
公开(公告)日：2023-12-12
申请号：US16631630
申请日：2018-02-28
Applicant: Edwards Limited
Inventor： William Foote , Stephen Dowdeswell , David Bedwell , Simon Stevens
IPC: F04C29/04 , F04C25/02 , F28D1/02 , F28D7/16 , F28F1/20 , F01C21/10 , F04B53/08 , F04C18/12 , F04D29/58 , F28D21/00
CPC classification number: F04C29/04 , F04C25/02 , F28D1/02 , F28D7/1669 , F28F1/20 , F01C21/10 , F04B53/08 , F04C18/126 , F04C2240/20 , F04C2240/40 , F04D29/5826 , F28D2001/026 , F28D2001/0273 , F28D2021/0029
Abstract: A heat exchanger for changing a temperature of a pumped gas flow and a pump comprising the heat exchanger is disclosed. The heat exchanger comprises: at least one tube configured to contain a flow of fluid; said at least one tube being at least partially embedded within a block of material; wherein said heat exchanger comprises mounting means configured to mount said heat exchanger adjacent to a gas port of a pump such that a least a portion of said heat exchanger extends into a path for gas flow flowing through said gas port; wherein the mounting means comprises a flange, the flange being configured to connect with the gas port of the pump, the block being mounted to the flange such that the block extends towards the rotor of the pump when the flange is connected with the gas port of the pump.
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公开(公告)号：US20220299027A1
公开(公告)日：2022-09-22
申请号：US17606277
申请日：2020-04-24
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , Nigel Paul Schofield , David Bedwell
Abstract: The invention provides a scroll pump comprising an orbiting scroll and a fixed scroll, wherein the orbital axis of the orbiting scroll is movable in a radial direction relative to the fixed scroll while the orbiting scroll is orbiting about its orbital axis, or wherein the fixed scroll is movable relative to the orbiting scroll in a radial direction while the orbiting scroll is orbiting about its orbital axis.
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