Streamlined flow in fluids

Claim 2

A high-pressure hose comprising a nozzle and a conduit and wherein there is interposed in a fluid flow path within the conduit, for inducing streamlined flow in the fluid, a baffle including a peripheral cylindrical tube to which there is secured by at least one radial support at least one rigid element which extends generally parallel to the direction of the flow path and which in section perpendicular to the flow path is concavely curved relative to the central axis of the conduit, the baffle affording when viewed in axial planes from the central axis of the conduit at least three flow paths separated from each other in a radial direction by the baffle, and which further includes at each axial end thereof an individual cylindrical tube of relatively small diameter located about the central axis of the baffle, said individual cylindrical tubes being spaced apart from one another.

Claim 3

A high-pressure hose as claimed in claim 1, wherein the baffle comprises at least two co-axial tubes of sheet material and of different diameter from each other.

Claim 4

A high-pressure hose as claimed in claim 1, wherein said at least one rigid element, in cross-section, has the form of a spiral of at least one revolution.

Claim 5

A high-pressure hose comprising a nozzle, a conduit and for inducing streamlined flow in a fluid moving within the conduit, a device which comprises a peripheral cylindrical tube to which there is attached by at least one radial support at least one rigid baffle element adapted to be interposed in the flow path of the fluid, the baffle element having a dimension extending in the general direction of the flow path and, in cross-section perpendicular to the general direction of the flow path, being substantially curvilinear, the centre or origin of the curve being coincident with the central axiS of the device, and which further includes at each axial end thereof an individual cylindrical tube of relatively small diameter located about the central axis of the device, said individual cylindrical tubes being spaced apart from one another.

Claim 6

A high-pressure hose comprising a nozzle, a conduit and for inducing streamlined flow in a fluid moving within the conduit, a device which comprises a peripheral cylindrical tube to which there is attached by at least one radial support at least one rigid baffle element adapted to be interposed in the flow path of the fluid, the baffle element having a dimension extending in the general direction of the flow path and, in cross-section perpendicular to the general direction of the flow path, being substantially curvilinear, the centre or origin of the curve being coincident with the central axiS of the device, and which further includes at each axial end thereof an individual cylindrical tube of relatively small diameter located about the central axis of the device, said individual cylindrical tubes being spaced apart from one another.

Claim 7

A high-pressure hose as claimed in claim 4, wherein the device comprises at least two co-axial tubes of sheet material and of different diameter from each other.

Claim 8

A high-pressure hose as claimed in claim 4, wherein said at least one rigid baffle element, in cross-section, has the form of a spiral of at least one revolution.

Claim 9

A high-pressure hose as claimed in claim 4, wherein said device comprises a spirally-formed element which is attached to and located in the annulus formed between two co-axial tubes.

Claim 10

A high-pressure hose comprising a nozzle and a conduit defining a flow path communicating with the nozzle, wherein there are disposed within the conduit two baffles which are spaced apart in an axial direction, each of said baffles including at least one rigid element which extends generally parallel to the direction of the flow path and which in section perpendicular to the flow path is concavely curved relative to the central axis of the conduit, said baffles affording when viewed in axial planes from the central axis of the conduit at least three flow paths separated from each other in a radial direction by the baffle, the elements of the baffle which is more remote from the nozzle having a greater radial separation than the elements of the other baffle.

Claim 11

A high-pressure hose comprising a nozzle and a conduit defining a flow path communicating with the nozzle, wherein there are disposed within the conduit two baffles which are spaced apart in an axial direction, each of said baffles including at least one rigid element which extends generally parallel to the direction of the flow path and which in section perpendicular to the flow path is concavely curved relative to the central axis of the conduit, said baffles affording when viewed in axial planes from the central axis of the conduit at least three flow paths separated from each other in a radial direction by the baffle, the elements of the baffle which is more remote from the nozzle having a greater radial separation than the elements of the other baffle.

Claim 12

A high-pressure hose as claimed in claim 8, wherein the device comprises at least two co-axial tubes of sheet material and of different diameters from each other.

Claim 13

A high-pressure hose as claimed in claim 8, wherein said at least one baffle element, in cross-section, has the form of a spiral of at least one revolution.

Claim 14

A high-pressure hose as claimed in claim 8, wherein said device comprises a spirally-formed element which is attached to and located in the annulus formed between two co-axial tubes.

Claim 15

A high-pressure hose as claimed in claim 8, wherein there are a plurality of baffle elements located so as to form, in cross-section, circumferentially spaced arcs of a common circle.

Claim 16

A high-pressure hose as claimed in claim 12, wherein there are a plurality of baffle elements located so as to form, in cross-section, a series of circumferentially spaced arcs of concentric circles, the arcs of one circle being circumferentially offset relative to the arcs of an adjacent circle.

Claim 17

A high-pressure hose as claimed in claim 13, wherein the spaces between adjacent arcs in any one circle are respectively disposed radially inwardly or outwardly of arcs in an adjacent circle.

Claim 18

A high-pressure hose as claimed in claim 8, wherein the radial thickness of said at least one rigid element is not greater than 0.10 inch.

Claim 19

A high-pressure hose as claimed in claim 8, wherein the device includes at each axial end thereof a cylindrical tube of relatively small diameter located about the central axis of the device.

Claim 20

A high-pressure hose comprising a nozzle and a conduit defining a flow path communicating with the nozzle, wherein there are disposed within the conduit two devices for inducing streamlined flow in a fluid moving in said conduit towards said nozzle, one of said devices being disposed close to the nozzle but spaced apart from the other device in an axial direction by a distance which is at least equal to the diameter of the conduit; the elements of the device which is more remote from the nozzle having a greater radial separation than the elements of the other device; each of said devices further comprising a peripheral cylindrical tube to which there is attached by at least one radial support at least one rigid baffle element having a dimension extending in the general direction of the flow path and in cross-section perpendicular to the general direction of the flow path, being substantially curvilinear, the centEr or origin of the curve being coincident with the central axis of each device; said devices further including at each axial end thereof a cylindrical tube of relatively small diameter located about their respective central axis.

Claim 21

A high-pressure hose comprising a nozzle and a conduit defining a flow path communicating with the nozzle, wherein there are disposed within the conduit two devices for inducing streamlined flow in a fluid moving in said conduit towards said nozzle, one of said devices being disposed close to the nozzle but spaced apart from the other device in an axial direction by a distance which is at least equal to the diameter of the conduit; the elements of the device which is more remote from the nozzle having a greater radial separation than the elements of the other device; each of said devices further comprising a peripheral cylindrical tube to which there is attached by at least one radial support at least one rigid baffle element having a dimension extending in the general direction of the flow path and in cross-section perpendicular to the general direction of the flow path, being substantially curvilinear, the centEr or origin of the curve being coincident with the central axis of each device; said devices further including at each axial end thereof a cylindrical tube of relatively small diameter located about their respective central axis.