公开(公告)号：US20180058453A1

公开(公告)日：2018-03-01

申请号：US15251567

申请日：2016-08-30

Applicant: Agilent Technologies, Inc.

Inventor： George Galica ,  John Calhoun ,  Ronald J. Forni ,  Vannie Lu

IPC: F04C28/24 ,  F04C18/02 ,  F04C25/02 ,  F04C29/12

CPC classification number: F04C28/24 ,  F04C18/0215 ,  F04C18/126 ,  F04C18/30 ,  F04C23/005 ,  F04C25/02 ,  F04C28/28 ,  F04C29/12 ,  F04C2220/10 ,  F04C2240/40

Abstract: A vacuum pump isolation (VPI) valve is interposed between a vacuum pump and a vacuum chamber. During normal operation of the vacuum pump, the VPI valve is open, allowing fluid communication between the vacuum pump and the vacuum chamber. When the vacuum pump becomes non-operational such as by losing power, the VPI valve closes, thereby isolating the vacuum chamber from the vacuum pump. The closing of the VPI valve is driven by the exhaust gas pressure of the vacuum pump. The VPI valve becomes exposed to the exhaust gas pressure by the opening of a pilot valve, which may occur as a result of the vacuum pump ceasing to operate. By this configuration, the VPI valve is hermetic and does not require ambient air for its operation.

公开(公告)号：US20240200558A1

公开(公告)日：2024-06-20

申请号：US18082417

申请日：2022-12-15

Applicant: Agilent Technologies, Inc.

Inventor： Vannie Lu ,  George Galica

IPC: F04D29/52 ,  F04D25/06 ,  F04D29/58

CPC classification number: F04D29/522 ,  F04D25/06 ,  F04D29/584

Abstract: An enclosure for a fluid pump includes an outer shell defining an enclosure interior, a stator holder disposed in the enclosure interior and at least partially surrounding a motor stator of a motor, and conduits configured to direct air through the enclosure interior. The outer shell includes air inlets positioned to allow air to flow from an ambient space outside of the enclosure into the enclosure interior, and air outlets positioned to allow air to flow from the enclosure interior to the ambient space. The enclosure defines air flow paths running from at least some of the air inlets, to and through the air conduits, and from the air conduits to at least some of the air outlets, thereby cooling the motor during operation. Electronics may be positioned in the enclosure interior, which may also be cooled by the configuration of the enclosure.

公开(公告)号：US20230392601A1

公开(公告)日：2023-12-07

申请号：US17834875

申请日：2022-06-07

Applicant: Agilent Technologies, Inc.

Inventor： Vannie Lu ,  George Galica

IPC: F04C29/06 ,  F04C18/02

CPC classification number: F04C29/065 ,  F04C18/0215 ,  F04C2240/40 ,  F04C2270/13

Abstract: A discharge muffler for a fluid pump is formed by a cowling and a muffler insert configured to be removably inserted into a muffler receptacle of the cowling. The muffler insert includes a muffler inlet, a muffler outlet, and a plurality of muffler walls. The pump includes a pumping stage, a motor, and a drive shaft coupled between the pumping stage and the motor. When the muffler insert is inserted into the muffler receptacle, the muffler inlet communicates with the pumping stage, and the cowling and the muffler insert cooperatively define the discharge muffler. The discharge muffler is configured or effective to suppress noise generated by fluid discharged from the pumping stage.

公开(公告)号：US12006937B2

公开(公告)日：2024-06-11

申请号：US17834875

申请日：2022-06-07

Applicant: Agilent Technologies, Inc.

Inventor： Vannie Lu ,  George Galica

IPC: F04C29/06 ,  F04C18/02 ,  F04C25/02

CPC classification number: F04C29/065 ,  F04C18/0215 ,  F04C25/02 ,  F04C29/068 ,  F04C2220/10 ,  F04C2240/40 ,  F04C2270/13

Abstract: A discharge muffler for a fluid pump is formed by a cowling and a muffler insert configured to be removably inserted into a muffler receptacle of the cowling. The muffler insert includes a muffler inlet, a muffler outlet, and a plurality of muffler walls. The pump includes a pumping stage, a motor, and a drive shaft coupled between the pumping stage and the motor. When the muffler insert is inserted into the muffler receptacle, the muffler inlet communicates with the pumping stage, and the cowling and the muffler insert cooperatively define the discharge muffler. The discharge muffler is configured or effective to suppress noise generated by fluid discharged from the pumping stage.

公开(公告)号：US11686311B1

公开(公告)日：2023-06-27

申请号：US17834858

申请日：2022-06-07

Applicant: Agilent Technologies, Inc.

Inventor： Vannie Lu ,  George Galica ,  Aileen Cheang

IPC: F04C29/00 ,  F04C18/02 ,  F04C29/04 ,  F04C15/00 ,  F04C19/00

CPC classification number: F04C29/0057 ,  F04C15/0057 ,  F04C15/0061 ,  F04C15/0073 ,  F04C18/0215 ,  F04C29/04 ,  F04C29/045 ,  F04C2240/40 ,  F04C2240/60 ,  F04C2240/807

Abstract: A fluid pump includes a pump head and a motor coupled by a drive shaft. The pump head includes a pump inlet, a pump outlet, and a pumping stage in which a movable pump element is driven by the drive shaft. The motor includes a motor rotor and a motor stator. A connector couples the motor rotor and the drive shaft. The connector includes a plate rotatable with the drive shaft, fan blades attached to the plate for establishing a flow of air for cooling the motor, and one or more counterweights attached to the plate for reducing or eliminating imbalance created by certain forces generated by the pump during operation.