公开(公告)号：US20180106387A1

公开(公告)日：2018-04-19

申请号：US15296093

申请日：2016-10-18

Applicant: Caterpillar Inc.

Inventor： Matthew J. Beschorner ,  Matthew P. Giacomi ,  Joseph Yousef

IPC: F16K11/07 ,  F16K31/06 ,  F15B13/04 ,  F15B1/26

CPC classification number: F16K11/0716 ,  F15B1/26 ,  F15B13/0402 ,  F15B2211/205 ,  F16K11/07 ,  F16K31/0613 ,  Y10T137/8671 ,  Y10T137/86767

Abstract: The present disclosure describes a spool for a hydraulic valve. The spool includes a cylindrical body having at least one slot configured to engage with a valve body of the hydraulic valve. The spool also includes a first chamber and a second chamber located downstream of the first chamber and in fluid communication with the first chamber. The first chamber is defined within the cylindrical body and configured to receive fluid through a plurality of holes defined in the cylindrical body. An inner diameter of the second chamber is less than an inner diameter of the first chamber. The first chamber is configured to elongate along a longitudinal axis thereof based on a pressure of the fluid received within the first chamber. Further, an outer surface of the first chamber is configured to contract based on the elongation of the first chamber.

公开(公告)号：US10247315B2

公开(公告)日：2019-04-02

申请号：US15296093

申请日：2016-10-18

Applicant: Caterpillar Inc.

Inventor： Matthew J. Beschorner ,  Matthew P. Giacomi ,  Joseph Yousef

IPC: F16K11/07 ,  F16K31/06 ,  F15B13/04 ,  F15B1/26

Abstract: A spool for a hydraulic valve includes a cylindrical body having a first end, a second end disposed opposite the first end, and an annular wall defined by an internal surface of the cylindrical body and an external surface of the cylindrical body. The annular wall defines a plurality of holes therethrough. The internal surface defines a first chamber, a second chamber, and a slot chamber within the cylindrical body, the second chamber being in fluid communication with the plurality of holes via the first chamber, the slot chamber being located between the second chamber and the second end of the cylindrical body. The annular wall defines a slot therethrough, the slot extending from the second end of the cylindrical body toward the first end of the cylindrical body along the longitudinal direction, the slot being open at the second end of the cylindrical body along the longitudinal direction.