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公开(公告)号：US12085178B2
公开(公告)日：2024-09-10
申请号：US18041139
申请日：2021-08-12
Applicant: Edwards Limited
Inventor： Cainan Long , Ian David Stones , Phillip North , Clifford George Burt , Robin Hockley , Konstantinos Karoulas
CPC classification number: F16K15/042 , F16K17/12 , F16K25/005 , F16K2200/204
Abstract: A vacuum system non-return valve includes a baffle for extending across a flow path in the vacuum system and a valve member. The baffle has an aperture, a perimeter of the aperture has a valve seat. The valve member has a curved sealing surface configured to mate with the valve seat. The valve member and aperture are configured such that the valve member obscures the aperture and seals with the valve seat to impede a flow of fluid in a closed position and is displaceable in use to move away from the valve seat and allow a fluid flow in an open position; at least a portion of the surface of the baffle surrounding the aperture slopes towards the inlet end of the valve such that the aperture is smaller at the inlet end than it is at the outlet end.
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公开(公告)号：US20220290767A1
公开(公告)日：2022-09-15
申请号：US17634643
申请日：2020-08-13
Applicant: Edwards Limited
Inventor： David Alan Turrell , Phillip North , Neil Turner , Michael Henry North , Clifford George Burt , Sivabalan Kailasam , Cainan Long , Ian David Stones
Abstract: A vacuum system non-return valve has a baffle for extending across a flow path The baffle has an aperture, a perimeter of the aperture having a valve seat. The valve also has a valve member having a protrusion extending from a surface configured to mate with the valve seat, the protrusion extending through the aperture; wherein the protrusion includes a retaining portion extending outwardly from the protrusion and configured such that the retaining portion cannot pass through the aperture. The valve member and aperture are configured such that the valve member obscures the aperture and seals with the valve seat to impede a flow of fluid from an outlet end to an inlet end in a closed position and is displaceable in use to move away from the valve seat and allow a fluid flow from the inlet end to the outlet end in an open position.
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公开(公告)号：US20230296183A1
公开(公告)日：2023-09-21
申请号：US18041139
申请日：2021-08-12
Applicant: Edwards Limited
Inventor： Cainan Long , Ian David Stones , Phillip North , Clifford George Burt , Robin Hockley , Konstantinos Karoulas
CPC classification number: F16K15/042 , F16K17/12 , F16K25/005 , F16K2200/204
Abstract: A vacuum system non-return valve includes a baffle for extending across a flow path in the vacuum system and a valve member. The baffle has an aperture, a perimeter of the aperture has a valve seat. The valve member has a curved sealing surface configured to mate with the valve seat. The valve member and aperture are configured such that the valve member obscures the aperture and seals with the valve seat to impede a flow of fluid in a closed position and is displaceable in use to move away from the valve seat and allow a fluid flow in an open position; at least a portion of the surface of the baffle surrounding the aperture slopes towards the inlet end of the valve such that the aperture is smaller at the inlet end than it is at the outlet end.
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