公开(公告)号：US10337532B2

公开(公告)日：2019-07-02

申请号：US15367675

申请日：2016-12-02

Applicant: Caterpillar Inc.

Inventor： Pengfei Ma ,  Aleksandar Egelja ,  Justin Speichinger ,  Shuhei Orimoto ,  Tetsuya Yoshino ,  Hideki Nakajima ,  Shogo Tada ,  Aleem Junaidi ,  Bryan Johnson ,  Matthew Beschorner

IPC: F15B13/04 ,  F15B11/08 ,  F15B13/02 ,  F15B21/14 ,  F15B1/26 ,  F15B13/044 ,  F15B11/00 ,  F15B11/024

Abstract: A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.

公开(公告)号：US20180156244A1

公开(公告)日：2018-06-07

申请号：US15367675

申请日：2016-12-02

Applicant: Caterpillar Inc.

Inventor： Pengfei Ma ,  Aleksandar Egelja ,  Justin Speichinger ,  Shuhei Orimoto ,  Tetsuya Yoshino ,  Hideki Nakajima ,  Shogo Tada ,  Aleem Junaidi ,  Bryan Johnson ,  Matthew Beschorner

IPC: F15B13/04 ,  F15B11/08 ,  F15B13/02 ,  F15B21/14 ,  F15B1/26 ,  F15B13/044

CPC classification number: F15B13/0402 ,  F15B1/26 ,  F15B11/003 ,  F15B11/024 ,  F15B11/08 ,  F15B13/021 ,  F15B13/024 ,  F15B13/044 ,  F15B13/0442 ,  F15B21/14 ,  F15B2011/0246 ,  F15B2211/50

Abstract: A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.

公开(公告)号：US10480159B2

公开(公告)日：2019-11-19

申请号：US15613987

申请日：2017-06-05

Applicant: Caterpillar Inc.

Inventor： Anthony Dean McNealy ,  Corey Lee Gorman ,  Shogo Tada ,  Rustin Glenn Metzger ,  Hideki Nakajima ,  Justin Douglas Speichinger ,  Shinya Ohmura

IPC: B60K6/10 ,  E02F9/22 ,  F15B21/14

Abstract: A kinetic energy recovery system (KERS) for a machine having a swing motor and/or an actuator includes a hydraulic motor/pump that can output pressurized fluid for operating at least one of: the swing motor and the actuator. A first shaft of the hydraulic motor/pump can be rotated by fluid returning from at least one of: the swing motor and the actuator back to the hydraulic motor/pump. Further, the KERS also includes a flywheel that can selectively couple with the first shaft with the help of a first clutch. The flywheel stores drive power generated by the hydraulic motor/pump from the return flow of fluid when the first clutch couples the flywheel with the first shaft of the hydraulic motor/pump. A gearing arrangement is coupled to the flywheel and can selectively engage with a second shaft associated with a prime mover of the machine with the help of a second clutch.

公开(公告)号：US20180347152A1

公开(公告)日：2018-12-06

申请号：US15613987

申请日：2017-06-05

Applicant: Caterpillar Inc.

Inventor： Anthony Dean McNealy ,  Corey Lee Gorman ,  Shogo Tada ,  Rustin Glenn Metzger ,  Hideki Nakajima ,  Justin Douglas Speichinger ,  Shinya Ohmura

IPC: E02F9/22 ,  F15B21/14

Abstract: A kinetic energy recovery system (KERS) tier a machine having a swing motor and/or an actuator includes a hydraulic motor/pump that can output pressurized fluid for operating at least one of: the swing motor and the actuator. A first shaft of the hydraulic motor/pump can be rotated by fluid returning from at least one of: the swing motor and the actuator back to the hydraulic motor/pump. Further, the KERS also includes a flywheel that can selectively couple with the first shaft with the help of a first clutch. The flywheel stores drive power generated by the hydraulic motor/pump from the return flow of fluid when the first clutch couples the flywheel with the first shaft of the hydraulic motor/pump. A gearing arrangement is coupled to the flywheel and can selectively engage with a second shaft associated with a prime mover of the machine with the help of a second clutch.

公开(公告)号：US09599238B2

公开(公告)日：2017-03-21

申请号：US14678101

申请日：2015-04-03

Applicant: Caterpillar Inc.

Inventor： Matthew J. Beschorner ,  Bryan A. Johnson ,  Hideki Nakajima

IPC: F16K11/07

CPC classification number: F16K11/0712 ,  F15B13/0402 ,  F15B13/0405 ,  F15B13/0417 ,  F15B2013/008 ,  F15B2211/30575 ,  Y10T137/86461

Abstract: A spool is disclosed for use in a valve. The spool may have an elongated cylindrical body with a first end and a second end. The spool may also have a first land formed at the first end, a second land axially spaced apart from the first land, and a check element located between the first and second lands. The check element may have an outer diameter that is about 0.5-1% greater than an outer diameter of the second land.