公开(公告)号：US20190277314A1

公开(公告)日：2019-09-12

申请号：US16286797

申请日：2019-02-27

Applicant: Hamilton Sundstrand Corporation

Inventor： Piotr SAWICKI ,  Marcin CIS

IPC: F15B13/16

Abstract: A valve body for a servovalve is provided, the valve body comprising: a first surface; a second surface offset from the first surface; a first passage extending through the body between the first and second surfaces from a first side of the body to a second side thereof; a second passage extending from the first surface towards the second surface and intersecting the first passage; a supply port joined with the first passage; a control port joined with the first passage; a return port joined with the first passage, wherein the return port comprises a third passage extending through the body between the first and second surfaces from a third side of the body to a fourth side thereof and intersecting with the first passage.

公开(公告)号：US20190093725A1

公开(公告)日：2019-03-28

申请号：US16030944

申请日：2018-07-10

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin CIS ,  Piotr SAWICKI

IPC: F16F1/16

Abstract: A new method of forming a torsion spring for use in a servovalve is described. The method comprises individually forming the different components of the torsion spring and then connecting the individual components together using a brazing process. The torsion spring created by this method is also described.

公开(公告)号：US20180135661A1

公开(公告)日：2018-05-17

申请号：US15698016

申请日：2017-09-07

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin CIS

IPC: F15B13/04

Abstract: A servovalve includes a fluid transfer valve assembly comprising a supply port and a control port a moveable valve spool arranged to regulate flow of fluid from the supply port to the control port in response to a control signal; and a jet pipe assembly configured to direct fluid to the ends of the spool to axially move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow. The jet pipe assembly includes a jet pipe and a connector header fluidly connecting the jet pipe to a nozzle via which fluid is directed to the spool ends. One or more openings is provided in the spool such that fluid from the supply port flows into the interior of the spool and into the jet pipe and to the nozzle via the connector header.

公开(公告)号：US20240209930A1

公开(公告)日：2024-06-27

申请号：US18540212

申请日：2023-12-14

Applicant: Hamilton Sundstrand Corporation

Inventor： Pawel Aleksander CHMIELEWSKI ,  Jonathan DARBY ,  Steve DAVIES ,  Lukasz TUREK ,  Marcin CIS ,  Katarzyna Agata LUSZCZYK

IPC: F16H49/00 ,  B64C13/34

CPC classification number: F16H49/001 ,  B64C13/34

Abstract: A strain wave drive includes an elliptical wave generator shaft rotatable about an axis (X), a flexible tubular flex spline mounted around the wave generator shaft and a ring gear assembly mounted around the flex spline. The ring gear assembly includes an output ring gear having a circular inner periphery and is sandwiched between two earth ring gears each having a circular inner periphery. The flex spline has a first number of radially outwardly extending teeth around its outer periphery; and wherein each earth ring gear has the first number of radially inwardly extending teeth to engage with the teeth of the flex spline; and wherein the output ring gear has a second number of radially inwardly extending teeth, wherein the second number is greater than the first number.

公开(公告)号：US20200025222A1

公开(公告)日：2020-01-23

申请号：US16508674

申请日：2019-07-11

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin CIS ,  Piotr SAWICKI

IPC: F15B13/16 ,  F15B13/04 ,  F15B13/043

Abstract: The disclosure provides a method of securing a feedback spring relative to a spool of a servovalve, the method comprising inserting the feedback spring at least partially into an internal cavity of the spool, inserting two fixing members into the internal cavity such that they each oppose a portion of the feedback spring, bringing the fixing members into respective set positions, such that the fixing members clamp the feedback spring and prevent relative movement between the feedback spring and the spool, and securing the fixing members in their respective set positions, such that the fixing members remain in their clamping positions and prevent relative movement between the feedback spring and the spool.

公开(公告)号：US20190024806A1

公开(公告)日：2019-01-24

申请号：US15964168

申请日：2018-04-27

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin CIS ,  Dominik GUNIA

IPC: F16K11/07

CPC classification number: F16K11/07 ,  F16K11/0708 ,  Y10T137/0502 ,  Y10T137/8671

Abstract: A spool for a spool valve having a longitudinal axis (L). The spool comprising: a plurality of lands each having a substantially radially extending metering edge and an axially extending circumferential surface; a plurality of grooves separating each of the plurality of the lands; and a guiding section located axially between at least one land and an adjacent groove. The guiding section comprising a plurality of circumferentially spaced guiding surfaces being substantially flush and contiguous with the circumferential surface of the land, wherein the guiding section allows fluid communication between the groove and the metering edge of the land.

公开(公告)号：US20180340555A1

公开(公告)日：2018-11-29

申请号：US15927403

申请日：2018-03-21

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin CIS ,  Sebastian ZURAW

IPC: F15B13/044 ,  F16K31/04 ,  F15B13/04 ,  F16K31/128 ,  G05D7/06

Abstract: A servovalve includes a fluid transfer valve assembly comprising a supply port and a control port and a moveable valve spool arranged to regulate flow of fluid from the supply port to the control port in response to a control signal. The servovalve also includes a jet pipe assembly configured to direct fluid to the ends of the spool to axially move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow. The jet pipe assembly comprises a jet pipe a connector header fluidly connecting the jet pipe to a nozzle. The spool has one or more openings 28 is provided in the spool such that fluid from the supply port flows into the interior of the spool and into the jet pipe.

公开(公告)号：US20180326431A1

公开(公告)日：2018-11-15

申请号：US15928132

申请日：2018-03-22

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin CIS ,  Piotr SAWICKI

IPC: B05B1/00

CPC classification number: F15B13/0438

Abstract: The present disclosure relates to a nozzle assembly for use in a servo valve. The nozzle assembly comprises three nozzle parts and a housing. The second part is coaxial with the first part and surrounds at least a first portion of the first part. The third part is coaxial with the first part, and a first portion of the third nozzle part surrounds a first portion of the second nozzle part, and a second portion of the third part is attached to a second portion of the first part. First and second nozzle parts are made of materials having approximately the same first coefficient of thermal expansion (TE1), and third part and housing are made of materials having approximately the same second coefficient of thermal expansion (TE2). TE1 is different from TE2. The interaction between the portions due to the differences in TE1 and TE2 allow the nozzle assembly to compensate for temperature fluctuations during and operation whilst remaining firmly held in position.

公开(公告)号：US20240209929A1

公开(公告)日：2024-06-27

申请号：US18540197

申请日：2023-12-14

Applicant: Hamilton Sundstrand Corporation

Inventor： Pawel CHMIELEWSKI ,  Lukasz TUREK ,  Jonathan DARBY ,  Marcin CIS

IPC: F16H49/00

CPC classification number: F16H49/001

Abstract: A strain wave drive includes an elliptical wave generator shaft rotatable about an axis (X), a flexible flex spline mounted around the wave generator shaft and a ring gear assembly mounted around the flex spline. The ring gear assembly includes an output ring gear having a circular inner periphery and is sandwiched between two earth ring gears each having a circular inner periphery. The flex spline has a first number of radially outwardly extending teeth around its outer periphery and each earth ring gear has the first number of radially inwardly extending teeth to engage with the teeth of the flex spline.

公开(公告)号：US20210180722A1

公开(公告)日：2021-06-17

申请号：US17186147

申请日：2021-02-26

Applicant: Hamilton Sundstrand Corporation

Inventor： Marcin CIS ,  Piotr SAWICKI

IPC: F16K49/00 ,  F16K31/06 ,  F28F13/06

Abstract: The present disclosure provides a heat exchanger system for a servovalve, comprising a base comprising a supply port in fluid communication with a return port, a first passage for fluid connection to a source of cooling fluid, and a second passage in fluid communication with the return port. The system further comprises one or more pipes located over a surface of the base, the one or more pipes fluidly connected between the first passage and the second passage, such that in use cooling fluid may flow from the first passage to the second passage via the network of pipes.