# US 7,607,458 B2 · Housing with intersecting passages

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- Number: US 7,607,458 B2
- Document ID: US7607458B2
- Status: Granted
- Kind: B2
- Application number: 11/986,446
- Filed: 2007-11-21
- Published: 2008-11-20
- Granted: 2009-10-27
- Earliest claimed: 2006-11-27
- Assignees: Delphi Technologies, Inc.
- Inventors: Jonathan D. Arnold; Antonin Cheron
- Web page: https://patentgrep.com/patent/US7607458B2

## CPC

- F16L 41/02: Branch units, e.g. made in one piece, welded, riveted
- F02M 59/44: Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; {Pumps having transducers, e.g. to measure displacement of pump rack or piston}
- F04B 53/16: Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F02M 59/48: Assembling; Disassembling; Replacing
- F02M 2200/16: Sealing of fuel injection apparatus not otherwise provided for
- F02M 2200/8069: involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)

## Abstract

A housing for use in high-pressure fluid applications, comprising a first passage defining a first axis (P1) and a second passage defining a second axis (P2), wherein the first and second passages intersect at an opening defined by an intersection at one end of the second passage. When sectioned on a plane normal to the second axis (P2) and not intersecting the first passage, the intersection defines an ellipse (E) in the plane and centred on the second axis (P2), the ellipse having a major axis equal in length to the width (D2) of the intersection and a minor axis equal in length to the height (D1) of the intersection. A wall of the intersection describes a curve in the plane, the curve passing through the points where the major and minor axes of the ellipse (E) meet the perimeter of the ellipse (E), and through points which lie outside the ellipse (E) and which are offset from the ellipse (E) by an offset distance (K).

## Claims

### Claim 1

A housing for use in high-pressure fluid applications, the housing being provided with:
a first passage defining a first axis (P1); and
a second passage defining a second axis (P2);
wherein:
a third axis (P3) is mutually orthogonal to the first axis (P1) and the second axis (P2);
the first and second passages intersect at an opening defined by an intersection at one end of the second passage; and
the intersection defines a first internal dimension (D1) parallel to the first axis (P1) and a second internal dimension (D2) parallel to the third axis (P3);
the intersection being shaped so that, when sectioned on a plane normal to the second axis (P2) and not intersecting the first passage, the intersection defines:
an ellipse (E) in the plane and centred on the second axis (P2), the ellipse having a major axis (G) equal in length to the second internal dimension (D2) and a minor axis (F) equal in length to the first internal dimension (D1);
a rectangle (M) with a first vertex on the first axis (P2), a second vertex at an end of the minor axis (F) of the ellipse (E); a third vertex at an end of the major axis (G) of the ellipse (E) and a fourth vertex outside the ellipse (E); and
a diagonal (H) which passes through the first vertex and the fourth vertex of the ellipse;
wherein:
a wall of the intersection describes a curve in the plane, the curve passing through the second vertex and the third vertex of the rectangle (M) and a point which is outside the ellipse (E) and which lies on a line (J) which extends from the first vertex of the rectangle (M) and at an angle (L) from the diagonal (H); and
the point is offset from an intersection of the line (J) with the ellipse (E) by an offset distance (K).

### Claim 2 (depends on 1)

The housing as claimed in claim 1, wherein the second internal dimension (D2) is larger than the first internal dimension (D1).

### Claim 3 (depends on 2)

The housing as claimed in claim 2, wherein the second internal dimension (D2) is at least 5% larger than the first internal dimension (D1).

### Claim 4 (depends on 3)

The housing as claimed in claim 3, wherein the second internal dimension (D2) is 30% larger than the first internal dimension (D1).

### Claim 5 (depends on 1)

The housing as claimed in claim 1, wherein the angle (L) is between −20° and +20°.

### Claim 6 (depends on 5)

The housing as claimed in claim 5, wherein the angle (L) is zero.

### Claim 7 (depends on 5)

The housing as claimed in claim 5, wherein the angle (L) is +1°.

### Claim 8 (depends on 1)

The housing as claimed in claim 1, wherein the offset distance (K) is at least 1% of the second internal dimension (D2).

### Claim 9 (depends on 8)

The housing as claimed in claim 8, wherein the offset distance (K) is between 2% and 12% of the second internal dimension (D2).

### Claim 10 (depends on 1)

The housing as claimed in claim 1, wherein at least two portions of the intersection each describe elliptical arcs defining two coplanar non-coincident ellipses, wherein each ellipse has a minor axis parallel to the first axis (P1) and a major axis parallel to the third axis (P3).

### Claim 11 (depends on 10)

The housing as claimed in claim 10, wherein the ratio of the major axis of the ellipse to the minor axis of the ellipse is at least 1.1 to 1.

### Claim 12 (depends on 10)

The housing as claimed in claim 10, wherein the ratio of the major axis of the ellipse to the minor axis of the ellipse has a non-constant value when the intersection is sectioned on parallel planes normal to the second axis (P2) and not intersecting the first passage.

### Claim 13 (depends on 10)

The housing as claimed in claim 10, wherein the second passage is substantially cylindrical about the second axis (P2), and the centre of each ellipse is offset from the second axis (P2) in a direction parallel to the first axis (P1).

### Claim 14 (depends on 1)

The housing as claimed in claim 1, wherein the intersection further comprises a radiused region adjacent to an internal wall of the first passage.

### Claim 15 (depends on 1)

The housing as claimed in claim 1, wherein the first internal dimension (D1) increases from a minimum value adjacent to the second passage to a maximum value adjacent to the first passage.

### Claim 16 (depends on 1)

The housing as claimed in claim 1, wherein the first internal dimension (D1) is substantially constant over a substantial portion of the intersection between the second passage and the first passage.

### Claim 17 (depends on 1)

The housing as claimed in claim 1, wherein the first internal dimension (D1) decreases from a maximum value adjacent to the second passage over at least a portion of the intersection.

### Claim 18 (depends on 1)

The housing as claimed in claim 1, wherein the second internal dimension (D2) increases from a minimum value adjacent to the second passage to a maximum value adjacent to the first passage.

### Claim 19 (depends on 18)

The housing as claimed in claim 18, wherein the first internal dimension (D1) increases from a minimum value adjacent to the second passage to a maximum value adjacent to the first passage and wherein the increase in the second internal dimension (D2) is greater than the increase in the first internal dimension (D1) over at least part of the intersection.

### Claim 20 (depends on 1)

The housing as claimed in claim 1, wherein the second internal dimension (D2) is substantially constant over a substantial portion of the intersection between the second passage and the first passage.

### Claim 21 (depends on 1)

The housing as claimed in claim 1, wherein the second internal dimension (D2) decreases from a maximum value adjacent to the second passage over at least a portion of the intersection.

### Claim 22

A housing for use in high-pressure fluid applications, the housing being provided with a first passage defining a first axis (P1) and a second passage defining a second axis (P2), wherein a third axis (P3) is mutually orthogonal to the first axis (P1) and the second axis (P2), and wherein the passages intersect at an opening defined by an intersection at one end of the second passage, the intersection being shaped so that, when sectioned on a plane normal to the second axis (P2) and not intersecting the first passage, at least two portions of the intersection each describe elliptical arcs defining two coplanar non-coincident ellipses, wherein each ellipse has a minor axis parallel to the first axis (P1) and a major axis parallel to the third axis (P3).

### Claim 23 (depends on 22)

The housing as claimed in claim 22, wherein the ratio of the major axis of the ellipse to the minor axis of the ellipse is at least 1.1 to 1.

### Claim 24 (depends on 22)

The housing as claimed in claim 22, wherein the ratio of the major axis of the ellipse to the minor axis of the ellipse has a non-constant value when the intersection is sectioned on parallel planes normal to the second axis (P2) and not intersecting the first passage.

### Claim 25 (depends on 22)

The housing as claimed in claim 22, wherein the second passage is substantially cylindrical about the second axis (P2), and the centre of each ellipse is offset from the second axis (P2) in a direction parallel to the first axis (P1).