公开(公告)号：US11359731B2

公开(公告)日：2022-06-14

申请号：US17064932

申请日：2020-10-07

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Marcin Korczynski

IPC: F16K11/07

Abstract: A servo valve assembly includes a housing defining a cylindrical cavity having a central axis, and a spool disposed in the cavity and co-axially aligned with the central axis. A pair of transition portions define opposing conical cavity surfaces each connect a respective one of first and second cylindrical cavity portions with a third cylindrical cavity portion. The spool comprises a pair of blocking members projecting radially, and each of the blocking members defines a conical blocking surface opposing a respective one of the conical cavity surfaces to define a fluid flow passage therebetween. A cone angle of each conical blocking surface relative to the central is equal to a cone angle of the opposing conical cavity surface relative to the central axis. The spool is moveable along the central axis to vary a flow area of the flow passages between the conical blocking surfaces and the conical cavity surfaces.

公开(公告)号：US10975894B2

公开(公告)日：2021-04-13

申请号：US16379983

申请日：2019-04-10

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Marek Jedliński

IPC: F15B13/04 ,  F16K5/02 ,  F16K5/04 ,  F16N21/06 ,  B25B7/14 ,  F15B21/041 ,  B01D29/05 ,  B25B27/06 ,  B25B27/20 ,  F15B13/043 ,  F16B4/00

Abstract: A plug for retaining a filter screen in a fluid port of a servovalve, comprises an annular body, the annular body comprising: opposed first and second axial end surfaces, a radially inner surface extending between the first and second axial end surfaces, a radially outer surface extending between the first and second axial end surfaces and at least one recess formed in the radially inner surface for receiving a tool for removing the plug from the port. A tool for removing the plug comprises a pair of handles pivotally mounted to one another about a pivot, each handle having a plug gripping portion extending therefrom beyond the pivot, each plug gripping portion comprising an outwardly projecting tooth for engaging in the recess of the plug when the plug gripping portions are moved apart by operation of the handles.

公开(公告)号：US11506291B2

公开(公告)日：2022-11-22

申请号：US16691839

申请日：2019-11-22

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Marek Jedliński

IPC: F16K3/02 ,  B01D29/05 ,  B23P19/04 ,  B25B27/02 ,  F15B21/041 ,  F15B13/043

Abstract: A plug for retaining a filter screen in a fluid port of a servovalve, the plug comprises an annular body. The annular body comprises opposed first and second axial annular end surfaces. A radially inner surface extends between the first and second axial annular end surfaces and a radially outer surface extends between the first and second axial annular end surfaces. At least one recess is formed in the radially inner surface for receiving a tool for removing the plug from the port. A plurality of slots is formed in the first axial annular end surface and extends into the at least one recess for providing access for the tool to the at least one recess.

公开(公告)号：US11060536B2

公开(公告)日：2021-07-13

申请号：US16832197

申请日：2020-03-27

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Marcin Korczynski

IPC: F16B13/04 ,  F16K11/07 ,  F15B13/04 ,  F15B13/043

Abstract: A servo valve includes a valve housing, a cavity formed in the valve housing defining an axis (X) and an axially moveable member disposed in the cavity. The member comprises flat surfaces parallel to the axis (X). A channel is formed within the cavity and a plurality of ports each forming a fluid passage through the valve housing in fluid communication with a spool and with the channel. The plurality of ports include first and second nozzles with nozzle openings, wherein in a first axial position of the member the first nozzle opening is at least substantially obstructed by the first flat surface, and in a second axial position of the member the second nozzle opening is at least substantially obstructed by the second surface, the member controlling fluid between the spool and the channel.

公开(公告)号：US12049910B2

公开(公告)日：2024-07-30

申请号：US17195741

申请日：2021-03-09

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Marek Jedliński

IPC: F15B13/04 ,  B01D29/05 ,  B25B7/14 ,  B25B27/06 ,  B25B27/20 ,  F15B13/043 ,  F15B21/041 ,  F16B4/00 ,  F16K5/02 ,  F16K5/04 ,  F16N21/06

CPC classification number: F15B13/04 ,  B01D29/055 ,  B25B7/14 ,  B25B27/06 ,  B25B27/205 ,  F15B13/043 ,  F15B21/041 ,  F16K5/025 ,  F16K5/04 ,  F16N21/06 ,  B01D2201/0423 ,  F16B4/004

Abstract: A plug for retaining a filter screen in a fluid port of a servovalve, comprises an annular body, the annular body comprising: opposed first and second axial end surfaces, a radially inner surface extending between the first and second axial end surfaces, a radially outer surface extending between the first and second axial end surfaces and at least one recess formed in the radially inner surface for receiving a tool for removing the plug from the port. A tool for removing the plug comprises a pair of handles pivotally mounted to one another about a pivot, each handle having a plug gripping portion extending therefrom beyond the pivot, each plug gripping portion comprising an outwardly projecting tooth for engaging in the recess of the plug when the plug gripping portions are moved apart by operation of the handles.

公开(公告)号：US11111934B2

公开(公告)日：2021-09-07

申请号：US16832209

申请日：2020-03-27

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Marcin Korczynski

IPC: F15B13/043 ,  F16K31/06 ,  F16K31/124 ,  F16K11/07

Abstract: A servo valve includes a valve housing, a cavity formed in the valve housing defining an axis (X) and an axially moveable member disposed in the cavity. At least one actuator is configured to axially move the member within the cavity and a spring is arranged between first and second axial ends of the valve housing. A channel is formed within the cavity and a plurality of ports each forming a fluid passage through the valve housing in fluid communication with a spool and with the channel. The plurality of ports comprise first and second nozzles with nozzle openings, wherein in a first axial position of the member the first nozzle opening is at least substantially obstructed, and in a second axial position of the member the second nozzle opening is at least substantially obstructed, the member controlling fluid between the spool and the channel.

公开(公告)号：US11306747B2

公开(公告)日：2022-04-19

申请号：US16533836

申请日：2019-08-07

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Maciej Zak

IPC: F15B13/04 ,  F15B5/00

Abstract: A single stage flapper type servovalve comprises a valve housing comprising a bore, a pair of opposed nozzles arranged in the bore and a flapper element arranged between the pair of nozzles. The valve housing further comprises a plurality of fluid ports for communicating a working fluid to and from the nozzles and in fluid communication with the housing bore. The valve housing and the nozzles are both made from a stainless steel material.

公开(公告)号：US11229918B2

公开(公告)日：2022-01-25

申请号：US16421713

申请日：2019-05-24

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin Korczynski ,  Maciej Bujewicz

IPC: B05B1/10 ,  F16L13/11 ,  F16K31/12

Abstract: A nozzle for a servo valve comprises an annular body defining an outer circumferential surface and an inner circumferential surface of the nozzle. An annular groove is disposed around the circumference of the annular body in the outer circumferential surface. A nozzle assembly (N) for a servo valve comprises the nozzle and a nozzle housing having a nozzle cavity defined by an inner circumferential cavity surface. The nozzle housing has an annular groove disposed around the circumference of the nozzle cavity in the inner circumferential cavity surface. The nozzle is received within the nozzle cavity such that the annular grooves in the nozzle and the nozzle housing are in fluid communication with each other.

公开(公告)号：US11112024B2

公开(公告)日：2021-09-07

申请号：US16721167

申请日：2019-12-19

Applicant: Hamilton Sundstrand Corporation

Inventor： Modest Adam Reszewicz ,  Maciej Bujewicz

IPC: F16K31/04 ,  F16K31/06 ,  B23P15/00

Abstract: A servovalve includes a torque motor section and a hydraulic section. The torque motor section may comprise first and second opposing pole pieces and first and second permanent magnets may be positioned between these first and second pole pieces. The torque motor section also comprises an armature/flapper assembly which comprises a torsion bridge, an armature plate and a flapper that is connected at a first end to the armature plate. The flapper extends from said armature plate along a first longitudinal axis X. The armature plate may extend between the first and second permanent magnets and along a second longitudinal axis Y that is perpendicular to the first axis X. The hydraulic section comprises: a housing that comprises a body section and a chimney section. The chimney section extends from the body section to a first end.

公开(公告)号：US12215791B2

公开(公告)日：2025-02-04

申请号：US18062114

申请日：2022-12-06

Applicant: Hamilton Sundstrand Corporation

Inventor： Maciej Bujewicz ,  Marcin Korczyński

IPC: F16K1/44 ,  F16K31/04

Abstract: A servo valve includes a fluid transfer valve assembly comprising a valve body having a supply port and a control port (C1). The valve body has first and second nozzles and a drive member therebetween, arranged to regulate flow of fluid from the supply port to the control port in response to a control signal. The assembly also includes a drive assembly comprising a magnetic coil and a core passing through the coil and configured to move axially with respect to the coil when the coil is powered by a current dependent on the control signal, the drive assembly arranged to move the drive member relative to the first and second nozzles in response to the control signal.