Pump comprising an attached gasket

Patent metadata

Field	Value
Publication number	US-11530701-B2
Application number	US-202117340475-A
Country	US
Kind code	B2
Filing date	Jun 7, 2021
Priority date	Jun 25, 2020
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A pump for applying fluid, the pump including: a pump housing, including: a fluid inlet on a low-pressure side; an fluid outlet on a high-pressure side; a circumferential wall surrounding the pump delivery chamber; and an end-facing wall featuring an outer end-facing surface facing axially away from the delivery chamber and at which the outlet emerges; a delivery member, moveable in the delivery chamber, for delivering the fluid from the low-pressure side to the high-pressure side; a gasket including a gasket loop which surrounds the outlet to seal it off on the outer end-facing surface of the end-facing wall; a female joining element featuring an axially extending hollow space; and a male joining element protruding through or from the pump housing or the gasket. The male joining element is in a joining engagement, which can be subjected to axial tensile stress, with the female joining element in the hollow space.

First claim

The invention claimed is:

1. A pump for applying fluid to a unit, the pump comprising:
a pump housing, comprising:
an inlet for the fluid on a low-pressure side;
an outlet for the fluid on a high-pressure side;
a circumferential wall which surrounds a delivery chamber of the pump; and
an end-facing wall featuring an outer end-facing surface facing axially away from the delivery chamber and at which the outlet emerges;

a delivery member, which is moveable in the delivery chamber, for delivering the fluid from the low-pressure side to the high-pressure side;
a gasket comprising a gasket loop which surrounds the outlet in order to seal it off on the outer end-facing surface of the end-facing wall;
a female joining element featuring an axially extending hollow space; and
a male joining element which protrudes through or from the pump housing or the gasket,
wherein the male joining element is in a joining engagement, which is axially tensile stressable, with the female joining element in the axially extending hollow space, and
wherein the gasket is in axial contact with one of the joining elements on a rear side facing axially away from the pump housing and is thus held on the pump housing and/or
the female joining element is screwed or fitted onto the male joining element,
wherein the gasket serves to establish a sealed fluid connection between the pressure outlet of the pump and a pressure port of an accommodating device.

2. The pump according to claim 1 , wherein the male joining element seals the axially extending hollow space.

3. The pump according to claim 1 , wherein the axially extending hollow space is a blind hole.

4. The pump according to claim 1 , wherein one of the joining elements is in axial contact with the rear side of the gasket and presses the gasket axially against the pump housing.

5. The pump according to claim 1 , wherein the male joining element is a screw, a threaded pin, a blind rivet or a press-fit bolt or pin.

6. The pump according to claim 1 , wherein the male joining element comprises a shaft and a head, the shaft protrudes axially through a passage of the gasket and into the axially extending hollow space, and the head of the male joining element presses axially against the gasket and thus presses the gasket against the pump housing.

7. The pump according to claim 1 , wherein the hollow space comprises an internal thread smaller than M5, and the joining elements are in a screw engagement in the axially extending hollow space.

8. The pump according to claim 1 , wherein at least one tongue protrudes outwards on an outer circumference of the gasket, and the male joining element protrudes through the tongue.

9. The pump according to claim 8 , wherein the male joining element comprises a shaft and a head, the shaft protrudes axially through a passage of the gasket and into the axially extending hollow space, and the head of the male joining element presses axially against the gasket and thus presses the gasket against the pump housing.

10. The pump according to claim 1 , wherein the female joining element is part of the pump housing and positions the circumferential wall and the end-facing wall relative to each other in terms of their rotational angular position, wherein the axially extending hollow space is provided on an end-facing side of the female joining element facing the gasket.

11. The pump according to claim 1 , wherein the female joining element is formed by an internally threaded standard pin.

12. The pump according to claim 11 , wherein the internally threaded standard pin is one according to DIN EN ISO 8735 or DIN EN ISO 8733.

13. A pump for applying fluid to a unit, the pump comprising:
a pump housing, comprising:
an inlet for the fluid on a low-pressure side;
an outlet for the fluid on a high-pressure side;
a circumferential wall which surrounds a delivery chamber of the pump; and
an end-facing wall featuring an outer end-facing surface facing axially away from the delivery chamber and at which the outlet emerges;

a delivery member, which is moveable in the delivery chamber, for delivering the fluid from the low-pressure side to the high-pressure side;
a spring which is spring-elastic in the axial direction and which surrounds the outlet on the outer end-facing surface of the end-facing wall; and
a gasket comprising a gasket loop which surrounds the outlet in order to seal it off on the outer end-facing surface of the end-facing wall,
wherein the gasket is held on the pump housing by means of a joining connection, and the spring is held on the pump housing by means of the gasket, and
wherein joining connection is formed in accordance with claim 1 .

14. A pump for applying fluid to a unit, the pump comprising:
a pump housing, comprising:
an inlet for the fluid on a low-pressure side;
an outlet for the fluid on a high-pressure side;
a circumferential wall which surrounds a delivery chamber of the pump; and
an end-facing wall featuring an outer end-facing surface facing axially away from the delivery chamber and at which the outlet emerges;

a delivery member, which is moveable in the delivery chamber, for delivering the fluid from the low-pressure side to the high-pressure side;
a spring which is spring-elastic in the axial direction and which surrounds the outlet on the outer end-facing surface of the end-facing wall; and
a gasket comprising a gasket loop which surrounds the outlet in order to seal it off on the outer end-facing surface of the end-facing wall,
wherein the gasket is held on the pump housing by means of a joining connection, and the spring is held on the pump housing by means of the gasket.

15. The pump according to claim 14 , wherein the spring is arranged between the end-facing wall and the gasket in the axial direction, and the gasket overlaps the spring in an axial view onto the end-facing wall.

16. The pump according to claim 14 , wherein at least one tongue protrudes outwards on an outer circumference of the gasket, and the tongue overlaps the spring in an axial view onto the end-facing wall.

17. The pump according to claim 14 , wherein the spring is formed by a disc spring.

Assignees

• Shw Automotive Gmbh

Inventors

• Welte Claus
• Meinig Uwe

Classifications

• F04C2240/30

  Casings or housings · CPC title

• F16H57/0436

  Pumps · CPC title

• F04C15/06

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C15/0023

  Axial sealings for working fluid · CPC title

• F04C2240/60

  Shafts · CPC title