公开(公告)号：US09068643B2

公开(公告)日：2015-06-30

申请号：US13676735

申请日：2012-11-14

Applicant: Caterpillar Inc.

Inventor： Benjamin T. Nelson ,  Andrew J. Krajnik ,  John J. Krone

IPC: F16H57/04

CPC classification number: F16H57/0424 ,  F04B9/02 ,  F16H57/0409 ,  Y10T74/19651 ,  Y10T74/2186

Abstract: A hydraulic pump housing comprises passages formed in an inner wall separating the gear cavity and the pump cavity to allow for the movement of fluid into and out of the gear cavity, thereby alleviating some of the power loss caused by churning lubricating oil. The hydraulic pump may comprise spaces integrally formed in axially opposing surfaces of the gear cavity walls adjacent the area where the gears mesh to enable the churning oil to expand and flow around the gears.

Abstract translation: 液压泵壳体包括形成在分隔齿轮腔和泵腔的内壁中的通道，以允许流体进入和离开齿轮腔，从而减轻由搅拌润滑油引起的一些动力损失。 液压泵可以包括在与齿轮啮合的区域相邻的齿轮腔壁的轴向相对表面中整体形成的空间，以使搅拌油能够在齿轮周围膨胀和流动。

公开(公告)号：US20140130634A1

公开(公告)日：2014-05-15

申请号：US13676735

申请日：2012-11-14

Applicant: CATERPILLAR INC.

Inventor： Benjamin T. Nelson ,  Andrew J. Krajnik ,  John J. Krone

IPC: F16H57/04

CPC classification number: F16H57/0424 ,  F04B9/02 ,  F16H57/0409 ,  Y10T74/19651 ,  Y10T74/2186

Abstract: A hydraulic pump housing comprises passages formed in an inner wall separating the gear cavity and the pump cavity to allow for the movement of fluid into and out of the gear cavity, thereby alleviating some of the power loss caused by churning lubricating oil. The hydraulic pump may comprise spaces integrally formed in axially opposing surfaces of the gear cavity walls adjacent the area where the gears mesh to enable the churning oil to expand and flow around the gears.

Abstract translation: 液压泵壳体包括形成在分隔齿轮腔和泵腔的内壁中的通道，以允许流体进入和离开齿轮腔，从而减轻由搅拌润滑油引起的一些动力损失。 液压泵可以包括在与齿轮啮合的区域相邻的齿轮腔壁的轴向相对表面中整体形成的空间，以使搅拌油能够在齿轮周围膨胀和流动。

公开(公告)号：US20150176697A1

公开(公告)日：2015-06-25

申请号：US14638355

申请日：2015-03-04

Applicant: Caterpillar Inc.

Inventor： Benjamin T. Nelson ,  Andrew J. Krajnik ,  John J. Krone

IPC: F16H57/04 ,  F04B9/02

CPC classification number: F16H57/0424 ,  F04B9/02 ,  F16H57/0409 ,  Y10T74/19651 ,  Y10T74/2186

Abstract: A hydraulic pump housing comprises passages formed in an inner wall separating the gear cavity and the pump cavity to allow for the movement of fluid into and out of the gear cavity, thereby alleviating some of the power loss caused by churning lubricating oil. The hydraulic pump may comprise spaces integrally formed in axially opposing surfaces of the gear cavity walls adjacent the area where the gears mesh to enable the churning oil to expand and flow around the gears.

Abstract translation: 液压泵壳体包括形成在分隔齿轮腔和泵腔的内壁中的通道，以允许流体进入和离开齿轮腔，从而减轻由搅拌润滑油引起的一些动力损失。 液压泵可以包括在与齿轮啮合的区域相邻的齿轮腔壁的轴向相对表面中整体形成的空间，以使搅拌油能够在齿轮周围膨胀和流动。