WO2005113153A1 - Nozzle protector cap - Google Patents
Nozzle protector cap Download PDFInfo
- Publication number
- WO2005113153A1 WO2005113153A1 PCT/AU2005/000725 AU2005000725W WO2005113153A1 WO 2005113153 A1 WO2005113153 A1 WO 2005113153A1 AU 2005000725 W AU2005000725 W AU 2005000725W WO 2005113153 A1 WO2005113153 A1 WO 2005113153A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- cap
- membrane
- blow
- nozzle system
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3006—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the controlling element being actuated by the pressure of the fluid to be sprayed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
- B05B15/16—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for preventing non-intended contact between spray heads or nozzles and foreign bodies, e.g. nozzle guards
Definitions
- This invention relates to the area of protective caps for maintaining the apertures in nozzles clear of foreign matter and in particular to a blow off type of protector cap which can be used in most environments.
- nozzle type devices are not necessarily used very frequently and consequently are susceptible to the build up of foreign matter inside the nozzles. Typically this may occur when, for example, nozzles used in fire fighting systems are located in areas where such contamination can arise.
- a nozzle cap was devised which was manufactured from metal, and therefore had improved strength when compared to plastic, but also was provided with a recess on its inner periphery into which sealing means in the form of an O-ring or the like could be located.
- a metal cap was provided which fitted firmly over a nozzle tip, and was able to be blown off in use, but did not require any modification of the nozzle in order to function.
- the invention provides a blow off cap and nozzle system including a nozzle having a tip, with an aperture therethrough, and having a nozzle cap formed from a sealing membrane attached thereto by retaining means that retains and seals the membrane to the nozzle tip while not hindering any projected spray pattern once the nozzle begins to spray.
- the sealing membrane is of a metallic foil such as aluminum, copper or the like. It may however be that in some instances a polymer or rubber type material may be chosen.
- the retaining means be a ring which is attached to the nozzle by screw means. It is further preferred that the screw means is a screwed thread or similar retention method once the membrane is placed over the nozzle tip. It is also preferred that the membrane be manufactured to a sufficient thickness and strength such that water pressure build up inside the nozzle is enough to ensure that the cap seal fractures appropriately prior to use.
- a membrane support be provided in the form of a plug device which can be a close fit into the nozzle aperture and which has an outwardly directed, enlarged, portion which prevents the plug passing into the aperture, which plug is held in place by the membrane.
- the above membrane support be a metallic device of the nozzle parent material or other and that it be a pintle (mushroom) shaped device being located via a stem, which resides in the nozzle orifice, and having a disc attached centrally at an outside end which supports the membrane while the membrane keeps it in place.
- a pintle mushroom
- the retaining means be knurled, to enable hand operation. Alternatively it may be preferred that it have a hexagonal or other shaped portion to enable it to be fitted and replaced by a standard spanner. It may also be preferred that the retaining means have recesses or the like which can only be contacted by a special tool to make the retaining means difficult to remove without use of the special tool.
- Fig. 1 Shows a cross-section through the blow off cap and nozzle assembly
- Fig. 2 Shows a cross-section through a nozzle and associated plug
- Fig. 3 Shows a diagrammatic representation of a tool to engage with the retaining means
- the nozzle cap assembly 10 of the invention is provided with a metallic sealing membrane or film 20 which covers the tip of the nozzle 30 and is attached to the nozzle tip by means of a specially designed retaining ring 40 that, while not hindering the projected spray pattern once the nozzle begins to spray, retains and seals the membrane to the nozzle tip.
- the nozzle in this embodiment of the invention is provided with a portion of its outer periphery which is adapted to engage with the restraining ring.
- the nozzle may be provided with a threaded section 15 such that once the membrane is placed over the nozzle tip the retaining ring can be easily fitted to the nozzle via a screwed thread 45 or similar retention method
- the membrane itself is manufactured to a particular thickness and strength which is enough to allow pressure build up inside the nozzle, when use is commenced, which is sufficient to ensure fracture and permanent deformation of the membrane such that the spray pattern is not hindered.
- the membrane used may be of a metallic foil such as aluminum, copper or similar, although in some instances a polymer or rubber type material may be chosen.
- sealing membrane itself may be adequate to form a seal, it may be required in some instances to include a suitable silicon based sealing grease or equivalent inside the nozzle to act as an ancillary sealing and membrane support. This addition may protect the membrane from environmental degradation while the membrane prevents it from dripping out at elevated temperatures or other conditions.
- a membrane support be provided in the form of a plug device 50 which can be a close fit into the nozzle aperture 16 and which has an outwardly directed, enlarged, portion 55 which prevents the plug passing into the aperture 16, which plug is held in place by the membrane 20.
- This membrane support 50 may be a metallic device of the nozzle parent material or other and preferably be a pintle (mushroom) shaped device being located via a stem 54, which resides in the nozzle aperture 16, and having a disc or cap 55 attached centrally at an outside end which supports the membrane 20 while the membrane keeps it in place.
- This outwardly directed mushroom shaped cap 55 is basically smooth so that it is unlikely to cause any rupturing of the membrane during normal use.
- the plug When the nozzle is being sealed the plug is located in the aperture, the membrane placed there over, and the retaining means screwed onto the body of the nozzle.
- This provides an arrangement where there can be no ingress of material into the aperture through the spray nozzle and the plug is retained in position by the membrane.
- the plug When the pressure input to the nozzle is increased the plug is forced outwardly, which in turn causes rupture of the membrane and the head of the plug is of such a size as to ensure that the rupture of the membrane is such as to move the membrane away from the outlet of the nozzle ( Figure 2) to cause no interruption in to the nozzle spray.
- the outer portion can take different forms.
- the retaining means has a knurled outer surface to enable ready grip and to enable it to be hand tightened and removed.
- the external surface may be provided with a hexagonal or square form which can cooperate with the required size spanner to enable it to be tightened or removed by the use of such spanner.
- the outer surface of the retaining member can be provided with rectangular recesses 44 or the like, which are adapted to be entered by an extension on a special tool 60, which can have a largely open portion 61 , which has a diameter corresponding closely to that of the nozzle, and which can surround a portion of the nozzle with at least one extension 62 entering one of the recesses 44 and providing a point against which leverage by the tool can be applied.
Landscapes
- Nozzles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005245038A AU2005245038B2 (en) | 2004-05-21 | 2005-05-20 | Nozzle protector cap |
NZ551960A NZ551960A (en) | 2004-05-21 | 2005-05-20 | Nozzle protector cap |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2004902742A AU2004902742A0 (en) | 2004-05-21 | Nozzle protector cap | |
AU2004902742 | 2004-05-21 | ||
AU2005900106A AU2005900106A0 (en) | 2005-01-12 | Nozzle protector cap | |
AU2005900106 | 2005-01-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005113153A1 true WO2005113153A1 (en) | 2005-12-01 |
Family
ID=35428287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2005/000725 WO2005113153A1 (en) | 2004-05-21 | 2005-05-20 | Nozzle protector cap |
Country Status (2)
Country | Link |
---|---|
NZ (1) | NZ551960A (en) |
WO (1) | WO2005113153A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009140733A1 (en) * | 2008-05-22 | 2009-11-26 | Spray Nozzle Engineering Pty. Limited | Nozzle protector blow off cap |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1837322A (en) * | 1930-01-23 | 1931-12-22 | Automatic Sprinkler Company | Sprinkler head |
US2389331A (en) * | 1944-07-12 | 1945-11-20 | Tyden Emil | Sprinkler head |
US4014388A (en) * | 1976-06-21 | 1977-03-29 | Central Sprinkler Corporation | Concealed sprinkler assembly |
US6296062B1 (en) * | 1999-10-08 | 2001-10-02 | Sundholm Goeran | Installation for extinguishing fire, spray head |
-
2005
- 2005-05-20 WO PCT/AU2005/000725 patent/WO2005113153A1/en active Application Filing
- 2005-05-20 NZ NZ551960A patent/NZ551960A/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1837322A (en) * | 1930-01-23 | 1931-12-22 | Automatic Sprinkler Company | Sprinkler head |
US2389331A (en) * | 1944-07-12 | 1945-11-20 | Tyden Emil | Sprinkler head |
US4014388A (en) * | 1976-06-21 | 1977-03-29 | Central Sprinkler Corporation | Concealed sprinkler assembly |
US6296062B1 (en) * | 1999-10-08 | 2001-10-02 | Sundholm Goeran | Installation for extinguishing fire, spray head |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009140733A1 (en) * | 2008-05-22 | 2009-11-26 | Spray Nozzle Engineering Pty. Limited | Nozzle protector blow off cap |
AU2009250339B2 (en) * | 2008-05-22 | 2014-05-08 | Spray Nozzle Engineering Pty Ltd | Nozzle protector blow off cap |
US20150273256A1 (en) * | 2008-05-22 | 2015-10-01 | Spray Nozzle Engineering Pty. Limited | Nozzle protection blow off cap |
US10569113B2 (en) | 2008-05-22 | 2020-02-25 | Sean Morgan | Nozzle protection blow off cap |
Also Published As
Publication number | Publication date |
---|---|
NZ551960A (en) | 2010-11-26 |
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