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公开(公告)号：US12049891B2
公开(公告)日：2024-07-30
申请号：US17628784
申请日：2020-07-22
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , Nigel Paul Schofield
IPC: F03C2/00 , F03C4/00 , F04C2/00 , F04C2/02 , F04C15/00 , F04C18/00 , F04C18/02 , F04C27/00 , F04C23/00
CPC classification number: F04C18/0215 , F04C2/025 , F04C15/0023 , F04C27/005 , F04C23/008 , F04C2240/801 , F05C2225/04
Abstract: A scroll pump (100, 200) comprising a first scroll comprising a first spiral wall (124, 224); a second scroll comprising a second spiral wall (134, 234), the second spiral wall being intermeshed with the first spiral wall; and a pad (180, 280) formed from a different material to the first and second scrolls, the pad being located between the first and second scrolls radially inwards or outwards of the first and second spiral walls.
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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：US20150192125A1
公开(公告)日：2015-07-09
申请号：US14411556
申请日：2013-06-10
Applicant: Edwards Limited
CPC classification number: F04C18/02 , F01C1/0215 , F04C18/0215 , F04C18/0246 , F04C18/0253 , F04C18/0261 , F04C18/0269 , F04C23/001 , F04C23/008 , F04C28/06 , F04C28/065 , F04C28/24
Abstract: The present invention is a scroll pump comprising two intermeshing scrolls arranged so that on relative orbital movement of the scrolls gas is pumped from an inlet to an outlet. The scrolls have a plurality of successive scroll wraps I, II, II, IV, V, VI between the inlet and the outlet. There is a single-start condition in which fluid is pumped from the inlet to the outlet along a single flow path extending through each of the scroll wraps in succession and a multi-start condition in which fluid is pumped from the inlet along a plurality of flow paths which extend in parallel through radially adjacent scroll wraps and converge to a single flow path prior to the outlet. A valve arrangement is operable for switching the scroll pump between the single-start and the multi-start conditions.
Abstract translation: 本发明是一种涡旋泵，其包括两个相互啮合的涡卷，其布置成使得在涡旋件的相对轨道运动将气体从入口泵送到出口。 涡卷在入口和出口之间具有多个连续的涡卷包装I，II，II，IV，V，VI。 存在一个单启动条件，其中流体沿着沿着每个涡旋卷片连续延伸的单个流动路径从入口泵送到出口，以及多起动条件，其中流体沿着多个 流动路径平行延伸通过径向相邻的涡卷卷绕并在出口之前会聚到单个流动路径。 阀装置可操作用于在单启动和多起动条件之间切换涡旋泵。
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公开(公告)号：US12025128B2
公开(公告)日：2024-07-02
申请号：US17999327
申请日：2021-05-20
Applicant: Edwards Limited
Inventor： Nigel Paul Schofield , Alan Ernest Kinnaird Holbrook
CPC classification number: F04C18/0215 , F01C19/005 , F04C27/002 , F04C27/005 , F04C2240/50
Abstract: A scroll vacuum pump has an axially extending drive shaft with an eccentric shaft portion, such that rotation of the drive shaft imparts an orbiting motion to an orbiting scroll relative to a fixed scroll. An axial adjustment mechanism has a plurality of adjustment members angularly spaced around the drive shaft and extending through the pump housing towards the orbiting scroll, the plurality of adjustment members each being configured to provide an independently adjustable axial position of the orbiting scroll. A plurality of sealing means isolate the plurality of adjustment members from a pump chamber, the plurality of sealing means extending around each of the plurality of adjustment members and comprising at least one flexible portion such that one end of the sealing means may orbit relative to a fixed other end of the sealing means.
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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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Patent Agency Ranking
公开(公告)号：US20220397115A1
公开(公告)日：2022-12-15
申请号：US17628784
申请日：2020-07-22
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , Nigel Paul Schofield
Abstract: A scroll pump (100, 200) comprising a first scroll comprising a first spiral wall (124, 224); a second scroll comprising a second spiral wall (134, 234), the second spiral wall being intermeshed with the first spiral wall; and a pad (180, 280) formed from a different material to the first and second scrolls, the pad being located between the first and second scrolls radially inwards or outwards of the first and second spiral walls.
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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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公开(公告)号：US20220213894A1
公开(公告)日：2022-07-07
申请号：US17606281
申请日：2020-04-24
Applicant: Edwards Limited
Inventor： Alan Ernest Kinnaird Holbrook , Nigel Paul Schofield , David Bedwell
Abstract: The invention provides a crank sleeve for a scroll pump. The crank sleeve has a longitudinal axis and is configured to provide a radially extending crank offset for imparting an orbital path on an orbital scroll of the scroll pump. The crank sleeve further comprises an integrally formed counterbalance for reducing pump vibration extending radially in a direction substantially opposite to the crank offset.
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公开(公告)号：US09297381B2
公开(公告)日：2016-03-29
申请号：US14411556
申请日：2013-06-10
Applicant: Edwards Limited
CPC classification number: F04C18/02 , F01C1/0215 , F04C18/0215 , F04C18/0246 , F04C18/0253 , F04C18/0261 , F04C18/0269 , F04C23/001 , F04C23/008 , F04C28/06 , F04C28/065 , F04C28/24
Abstract: The present invention is a scroll pump comprising two intermeshing scrolls arranged so that on relative orbital movement of the scrolls gas is pumped from an inlet to an outlet. The scrolls have a plurality of successive scroll wraps I, II, II, IV, V, VI between the inlet and the outlet. There is a single-start condition in which fluid is pumped from the inlet to the outlet along a single flow path extending through each of the scroll wraps in succession and a multi-start condition in which fluid is pumped from the inlet along a plurality of flow paths which extend in parallel through radially adjacent scroll wraps and converge to a single flow path prior to the outlet. A valve arrangement is operable for switching the scroll pump between the single-start and the multi-start conditions.
Abstract translation: 本发明是一种涡旋泵，其包括两个相互啮合的涡卷，其布置成使得在涡旋件的相对轨道运动将气体从入口泵送到出口。 涡卷在入口和出口之间具有多个连续的涡卷包装I，II，II，IV，V，VI。 存在一个单启动条件，其中流体沿着沿着每个涡旋卷片连续延伸的单个流动路径从入口泵送到出口，以及多起动条件，其中流体沿着多个 流动路径平行延伸通过径向相邻的涡卷卷绕并在出口之前会聚到单个流动路径。 阀装置可操作用于在单启动和多起动条件之间切换涡旋泵。
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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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