Flow monitoring device for hydraulic pump

Patent metadata

Field	Value
Publication number	US-2016195093-A1
Application number	US-201615067191-A
Country	US
Kind code	A1
Filing date	Mar 11, 2016
Priority date	Mar 11, 2016
Publication date	Jul 7, 2016
Grant date	—

Abstract

A flow monitoring device is coupled to a case drain of a hydraulic pump. The flow monitoring device includes a manifold to receive a fluid flow from the case drain. The manifold has an inlet, a throat and an outlet. The manifold includes a pressure sensor to measure a differential pressure of fluid between the inlet and the throat. The manifold further includes a temperature sensor to measure a temperature of fluid flowing through the manifold. A bypass passage is fluidly coupled between the inlet and the outlet of the manifold. A bypass valve located in the bypass passage regulates an amount of fluid flowing from the inlet to the outlet of the manifold through the bypass passage.

First claim

What is claimed is:

1 . A flow monitoring device coupled to a hydraulic pump, the flow monitoring device comprising:
a manifold configured to receive a flow of fluid from a case drain of the hydraulic pump, the manifold having an inlet, a throat and an outlet; a pressure sensor coupled with the manifold, wherein the pressure sensor is configured to provide a signal indicative of a pressure difference between the inlet and the throat of the manifold; a temperature sensor disposed in the manifold, wherein the temperature sensor is configured to provide a signal indicative of a temperature of the fluid; a bypass passage fluidly coupled between the inlet and the outlet of the manifold; and a bypass valve disposed in the bypass passage, wherein the bypass valve regulates an amount of fluid flowing through the bypass passage from the inlet of the manifold.

Assignees

• Caterpillar Inc

Inventors

• Carpenter Richard A
• Dubenco Peter
• Morey Stephen J

Classifications

• G01F1/68 Primary

  by using thermal effects · CPC title

• F04D15/0083 Primary

  Protection against sudden pressure change, e.g. check valves · CPC title

• G01F1/363

  with electrical or electro-mechanical indication (G01F1/37 and G01F1/38 take precedence) · CPC title

• G01F1/44

  Venturi tubes · CPC title

• G01F15/04

  of gases to be measured · CPC title