Jet pump housing with cooling channels

Patent metadata

Field	Value
Publication number	US-12497148-B2
Application number	US-202217942301-A
Country	US
Kind code	B2
Filing date	Sep 12, 2022
Priority date	Sep 14, 2021
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A jet pump housing is mountable to a hull of a personal watercraft. The jet pump housing comprises a body extending between an inlet and an outlet. The body has an inner wall delimiting an interior of the body and an outer wall. The inner wall and the outer wall are configured to be exposed to water during use of the personal watercraft. The body is shaped and sized to allow water to flow into the interior via the inlet and to expel water from the outlet. The body has one or more fluid passages positioned between the inner wall and the outer wall. The one or more fluid passages are fluidly isolated from the water and are in heat exchange relationship with the water via one or both of the inner wall and the outer wall.

First claim

The invention claimed is:

1 . A personal watercraft, comprising:
a jet propulsion system, including:
a jet pump housing extending between an inlet of the jet pump housing and an outlet of the jet pump housing, the jet pump housing having an inner wall delimiting an interior of the jet pump housing and an outer wall, the inner wall and the outer wall configured to be exposed to water during use of the personal watercraft, the jet pump housing having one or more fluid passages positioned between the inner wall and the outer wall, the one or more fluid passages fluidly isolated from the water and in heat exchange relationship with the water via one or both of the inner wall and the outer wall; and
an impeller positioned within the interior of the jet pump housing and rotatable about an impeller axis to draw the water into the interior of the jet pump housing via the inlet and to expel water from the outlet; and
a thermal management system having a pump and fluid lines extending between the pump and the one or more fluid passages of the jet pump housing, the pump operable to convey a thermal transfer fluid through the fluid lines to one or more components of the personal watercraft to absorb heat from the one or more components, the pump operable to convey the thermal transfer fluid through the fluid lines to the one or more fluid passages of the jet pump housing to release the heat to the water.

2 . The personal watercraft of claim 1 , wherein the one or more fluid passages are positioned closer to the inner wall than to the outer wall.

3 . The personal watercraft of claim 1 , wherein the inner wall forms a heat-transfer wall separating the one or more fluid passages from the interior of the jet pump housing.

4 . The personal watercraft of claim 1 , wherein the jet pump housing includes an upstream portion defining the inlet of the jet pump housing and a downstream portion defining the outlet, the one or more fluid passages extending through one or both of the upstream portion and the downstream portion.

5 . The personal watercraft of claim 1 , wherein the jet pump housing includes stator vanes extending from the inner wall into the interior, one or more of the one or more fluid passages present within the stator vanes.

6 . The personal watercraft of claim 1 , wherein the jet pump housing includes stator vanes extending from the inner wall to a hub in the interior of the jet pump housing, one or more of the one or more fluid passages present within the stator vanes and within the hub.

7 . The personal watercraft of claim 1 , comprising a water intake in fluid communication with the inlet and defining an upstream opening covered by a grate, the grate having one or more grate fluid passages in fluid communication with the one or more fluid passages.

8 . The personal watercraft of claim 1 , wherein the jet pump housing is an annular body defining a housing center axis, one or more of the one or more fluid passages extending circumferentially about the housing center axis.

9 . The personal watercraft of claim 1 , comprising a ride plate positioned underneath the jet pump housing, the ride plate being free of internal passages.

10 . The personal watercraft of claim 1 , comprising a ride plate positioned underneath the jet pump housing, the ride plate having one or more strakes.

11 . The personal watercraft of claim 9 , comprising a pump shoe mounted to the ride plate, the pump shoe having one or more pump shoe fluid passages in fluid communication with the one or more fluid passages.

12 . A jet pump housing mountable to a hull of a personal watercraft, the jet pump housing comprising: a body extending between an inlet of the jet pump housing and an outlet of the jet pump housing, the body having an inner wall delimiting an interior of the body and an outer wall, the inner wall and the outer wall configured to be exposed to water during use of the personal watercraft, the body shaped and sized to house an impeller of a jet pump in the interior of the body and allow water to flow into the interior via the inlet and to expel water from the outlet, the body having one or more fluid passages positioned between the inner wall and the outer wall, the one or more fluid passages fluidly isolated from the water and in heat exchange relationship with the water via one or both of the inner wall and the outer wall.

13 . The jet pump housing of claim 12 , wherein the one or more fluid passages are positioned closer to the inner wall than to the outer wall.

14 . The jet pump housing of claim 12 , wherein the inner wall forms a heat-transfer wall separating the one or more fluid passages from the interior of the body.

15 . The jet pump housing of claim 12 , wherein the body includes an upstream portion defining the inlet of the body and a downstream portion defining the outlet, the one or more fluid passages extending through one or both of the upstream portion and the downstream portion.

16 . The jet pump housing of claim 12 , wherein the body includes stator vanes extending from the inner wall into the interior, one or more of the one or more fluid passages present within the stator vanes.

17 . The jet pump housing of claim 12 , wherein the body includes stator vanes extending from the inner wall to a hub in the interior of the housing, one or more of the one or more fluid passages present within the stator vanes and within the hub.

18 . The jet pump housing of claim 12 , wherein the body is an annular body defining a housing center axis, one or more of the one or more fluid passages extending circumferentially about the housing center axis.

19 . A personal watercraft, comprising:
a hull defining a water intake extending along a bottom portion of the hull, the water intake defining an opening covered by a grate; a ride plate positioned along the bottom portion of the hull; a pump shoe extending between the grate and the ride plate; one or more fluid passages positioned in one or both of the grate and the pump shoe; and a thermal management system having a pump and fluid lines extending between the pump and the one or more fluid passages, the pump operable to convey a thermal transfer fluid through the fluid lines to one or more components of the personal watercraft to absorb heat from the one or more components, the pump operable to convey the thermal transfer fluid through the fluid lines to the one or more fluid passages to release the heat to the water.

20 . The personal watercraft of claim 19 , wherein the ride plate is free of internal passages.

Assignees

• Taiga Motors Inc

Inventors

• Bruneau Samuel
• Roy-Bernier Clovis

Classifications

• F04F5/10

  displacing liquids, e.g. containing solids, or liquids and elastic fluids · CPC title

• F04F5/44

  Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42 · CPC title

• F04F5/461

  Adjustable nozzles · CPC title

• B63B34/10

  Power-driven personal watercraft, e.g. water scooters (water jet propulsion B63H11/00; jet steering B63H25/46); Accessories therefor · CPC title

• B63H11/08 Primary

  of rotary type · CPC title