公开(公告)号：US20190360598A1

公开(公告)日：2019-11-28

申请号：US15989703

申请日：2018-05-25

Applicant: Hamilton Sundstrand Corporation

Inventor： Myles R. Kelly ,  James S. Elder, JR.

IPC: F16K1/32 ,  F04D27/00 ,  F02C7/26

Abstract: A bleed valve includes a valve housing defining an inlet and an outlet with a flow path for fluid communication from the inlet to the outlet. A poppet head is connected to the valve housing by a primary spring and a secondary spring. The poppet head is configured for movement relative to the valve housing between: a fully open position in which the poppet head is spaced apart from the inlet to allow flow through the flow path, with the primary spring and secondary spring both expanded; a partially closed position in which the poppet head is spaced apart from the inlet but is closer to the inlet than in the fully open position, with the primary spring compressed; and a fully closed position in which the poppet head seats against the valve housing blocking flow through the flow path, with the primary spring and the secondary spring both compressed.

公开(公告)号：US20170198694A1

公开(公告)日：2017-07-13

申请号：US14993406

申请日：2016-01-12

Applicant: Hamilton Sundstrand Corporation

Inventor： Lubomir A. Ribarov ,  Leo J. Veilleux, JR. ,  James S. Elder, JR.

IPC: F04C15/00 ,  F04C15/06 ,  F04C2/18

CPC classification number: F04C15/0049 ,  F04C2/088 ,  F04C2/18

Abstract: A gear pump includes a drive gear with drive gear teeth and a driven gear with driven gear teeth. The drive gear is rotatably disposed about a drive gear axis. The driven gear is rotatably disposed about a driven gear axis and is intermeshed with the drive gear such that a plurality of driven gear teeth are in sliding contact with a plurality of the driven gear teeth. One or more of the drive gear teeth or the driven gear teeth define within the tooth interior a cavity. The cavity is in fluid communication through an orifice with an inter-tooth volume defined between the contacting drive gear teeth and driven gear teeth such that fluid flows through the orifice to reduce cavitation within fluid confined within the inter-tooth volume.

公开(公告)号：US20170198693A1

公开(公告)日：2017-07-13

申请号：US14993891

申请日：2016-01-12

Applicant: Hamilton Sundstrand Corporation

Inventor： Lubomir A. Ribarov ,  James S. Elder, JR. ,  Leo J. Veilleux, JR.

IPC: F04C15/00 ,  B64D37/02 ,  B64D37/00 ,  F04C2/16 ,  F02C7/22

CPC classification number: F04C15/0042 ,  F04C2/08 ,  F04C2/088

Abstract: A pump includes first and second gears coupled to one-another for rotation about respective axis. The first gear may include a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion. A plurality of first recesses are defined by the first hub portion, communicate radially outward, and are circumferentially distributed about the first hub portion between adjacent teeth of the plurality of first teeth.

公开(公告)号：US20190331030A1

公开(公告)日：2019-10-31

申请号：US15965502

申请日：2018-04-27

Applicant: Hamilton Sundstrand Corporation

Inventor： Myles R. Kelly ,  James S. Elder, JR.

IPC: F02C9/18 ,  F16K15/02

Abstract: A bleed valve for an air plenum includes a valve body having a poppet seat, a poppet supported by the valve body and movable relative to the poppet seat, and piston slideable relative to the poppet and movable relative to the poppet between an extended position and a retracted position. Gas turbine engines and methods of bleeding fluid from gas turbine engines are also described.