GB2256024A - Hose - Google Patents

Abstract

In or for an oil fired water-heating boiler, a hose unit incorporating opposite-end connectors for connection to and removal from the fuel supply pipe oil cock, and the burner, respectively made from a lining of polyester elastomer brass coated high tensile steel braid (i.e. a hose comprising an elastomeric lining with a metal-coated high tensile braid reinforcement) covered in a sleeve of polyurethane material of appropriate characteristics. <IMAGE>

Description

HOSE Background to the Invention The invention relates to hoses, to be used in domestic baiLers.

The type of hose used in a domestic water-heating boiler, partatiy oil-fired boilers, to make a connection between the rid copper pipe supplying the oil, ciose to a point near the burner and the burner itself has several disadvantages.

The main problem is the inherent weakness of the material from which the hose is made. The kerosene fuel used in oil-fired boilers tends to rot the inner surface of the hose. The material is readily malleable and, because of this property, after a boiler has been serviced, the hose is often replaced in a twisted or kinked way. This causes points of stress resulting in further weakening and deterioration of the hose material Over a period of time, the hose deteriorates to such an extent that it becomes brittle and may crack causing an oil leak. The financial damage of oil soaked carpets, floors and plaster work resulting from such a leak, is obvious.The much more serious risk of using this type of hose when in its deteriorated state, is that of the possible ignition of the flammable kerosene, the first pososiy causing a fatality The hoses may be DIN (German kdussnal Standards) marked for gas oil but there is no equivalent approved standard for hoses for use with kerosene type fueL Not only do the hoses deteriorate through use, which could be expected, but also the hoses deteriorate whilst being stored prior to use.

The inventive feature is the realisation that a hose used previously for hydraulic oils and indusotal ial gases would solve the problems inherent in hoses currently used for domestic oil-fired water heating boilers. The additional new feature of the hose is to use a technique of crimping, previously used in conjunction with attaching connectors to a hose to be used for hydraulic ailt to secure connectors previously used for oil burner pumps.

Summary of the Invention According to the invention in its broadest aspect there is provided a hose unit (ie incorporating oppositeend connector for connection to and removal from the fuel supply ppe oil cock, and the burner, respectively).

The hose, suitable for use in a domestic water heating boiler may have connectors at each end to be engageably removed from and to connect an oil cock fried to the rigid supply pipe and a burner. For the avoidance of doubt, the invention includes within its scope an oil- fired water heating boiler - in particular, a domestic oil-fired water heating boiler - incorporating such a hose.

Description of the Preferred Embodiments Figure 1 shows a first embodiment of the invention. Hose 10 is made from a lining of polyester elastomer brass coated high tensile steel braid (ie. a hose comprising an elastomeric lining with a metal costed high tensile braid raingforcement) covered in a sleeve of pelyuethane material of appropriate characteristics.

Female connector 11 and male connector 12 are attached to the hose 10 by camping at 13 and 14 respectively. The female connector 11 composes a Euro Power sight insert spherical seat with a swivel nut. likewise the male connector 12 comprises a Euro Power straight insert with a spherical seat and male or female swivel nut.

At points 13 and 14 ferrules 16 and 17 respectively are pimped onto the hose using a swaging machine. The ferrules 16 and 17 are crimped along their entire length to secure them to the hose 10. The type of ferrules 16 and 17 which may be used with the EUROFLOW 702 hose are Euro Power swaged ferrules.

In the embodiment shown in Figure 1, the male connector 12 is bent, this is achieved by fitting a Euro Power 90 elbow insert between ferrule 16 and the male connector 12.

Figure 2 shows a second embodiment of the invention, like features have the same reference numerals. In this embodiment, the male connector is straight.

To suit some burners the male connector 12 may be female to connect to a union tale. The alternative female nut is 15.

Claims (8)

CLAIMS:

1. In or for an oil fired water- heating boiler, a hose unit incorporating opposiSend connectors for connection to and removal from the fuel supply pipe oil cock, and the burner, respectively made from a lining of polyester elastomer harass coated high tensile steel braid (ie. a hose comprising an elastomeric lining with a metal-coated high tensile braid reinforcement) covered in a sleeve of polyurethane material of appropriate characteristics.

A hose according to Claim 1 and adapted for use in a domestic water heating boiler having connectors at each end to be engageably removed from and to connect an oil cock fitted to a rigid supply pipe and a burner.

3. A hose according to Claim 2 in which the connectors are attached to the hose by aim ping.

4. A hose in which one connector is male, the other female.

5. A hose according to Claim 3 in which both connectors are female.

6. A hose according to Claims 3 and 4 in which the male connector is bent.

7. A hose according to Claims 3 and 5 in which the male connector is straight.

8. A hose, substantially as described herein with reference to, and as illustrated by, the accompanying dswings.