EP2255885A1 - Spray tube assembly of a rotary spray gun - Google Patents
Spray tube assembly of a rotary spray gun Download PDFInfo
- Publication number
- EP2255885A1 EP2255885A1 EP20100005290 EP10005290A EP2255885A1 EP 2255885 A1 EP2255885 A1 EP 2255885A1 EP 20100005290 EP20100005290 EP 20100005290 EP 10005290 A EP10005290 A EP 10005290A EP 2255885 A1 EP2255885 A1 EP 2255885A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- spray
- spray tube
- nozzle
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims abstract description 152
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 31
- 239000012530 fluid Substances 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 for example Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
- B05B3/06—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction, i.e. creating a spinning torque due to a tangential component of the jet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
- B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
- B05B7/2424—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together downstream of the container before discharge
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- 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
- B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material
Definitions
- the present invention relates to a rotary spray gun for cleaning purposes and more particularly, to a spray tube assembly of a rotary spray gun, which is formed by sleeving a first bearing, a reinforcing tube, a second bearing and a gasket ring onto a nozzle tube and then inserting with the nozzle tube into a spray tube to constitute a modularized structure that facilitates installation and maintenance.
- Water spray gun or pistol nozzle is an implement controllable by a control lever to output a forced flow of water.
- brushes, wipes, cleaning cloth, and/or many other cleaning tools may be used with a water spray gun or pistol nozzle.
- a piece of cloth is usually used to dry and clean the washed object. This cleaning method takes much time and labor and consumes a big amount of water. To avoid these problems, rotary spray guns are created.
- FIG. 8 illustrates a known design of rotary spray gun.
- the rotary spray gun A comprises a front barrel A1, a spray tube A12 connected to the front connection end A11 of the front barrel A1, a water tube A13 connected to an external water container and suspending in the front barrel A1, and a nozzle assembly B mounted inside the spray tube A12.
- the nozzle assembly B comprises a delivery tube B1 connected to the front connection end A11 of the front barrel A1 for input of water from the water tube A13 and a flow of compressed air being guided from an external compressed air source into the front barrel A1, a cylindrical tube B2 mounted in the spray tube A12 around the delivery tube B1, a curved nozzle tip B4, a connector B3 that connects the curved nozzle tip B4 to the delivery tube B1, and bearings B5 mounted in the cylindrical tube B2 to support the delivery tube B1 and the connector B3, allowing rotation of the curved nozzle tip B4 with the cylindrical tube B2 relative to the delivery tube B1.
- the curved nozzle tip B4 is forced to rotate with the cylindrical tube B2 relative to the delivery tube B1.
- the present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a spray tube assembly for rotary spray gun, which has a modularized structural design, facilitating installation and maintenance.
- a spray tube assembly comprises a spray tube, a nozzle tube, a first bearing, a reinforcing tube, a second bearing and a gasket ring.
- the first bearing, the reinforcing tube, the second bearing and the gasket ring are respectively sleeved onto the nozzle tube in proper order and then inserted with the nozzle tube into the spray tube, thereby constituting a modularized structure of spray tube assembly for quick connection to the barrel of a spray gun in a detachable manner.
- the modularized structure of spray tube assembly facilitates installation and maintenance.
- the gasket ring is abutted against the outer side of the first bearing and kept in friction engagement with the inside wall of the connection portion of the spray tube tightly, securing the second bearing to an annular step in the connection portion of the spray tube firmly and avoiding water leakage.
- a spray tube assembly 1 for rotary spray gun in accordance with a first embodiment of the present invention is shown comprising a spray tube 11, a nozzle tube 12, a reinforcing tube 13, a first bearing 14, a second bearing 15 and a gasket ring 16.
- the spray tube 11 is a hollow cylindrical member having one end thereof terminating in an orifice 111 and the other end thereof terminating in a connection portion 112 that defines a circular mounting hole 1121 and an annular step 1122 at the inner end of the circular mounting hole 1121.
- the nozzle tube 12 has an elongated tubular body portion 121 mounted in the spray tube 11 and a nozzle tip 122 obliquely extended from one end of the elongated tubular body portion 121 at an angle and suspending inside the spray tube 11 in proximity to the orifice 111.
- the reinforcing tube 13 is mounted inside the spray tube 11 around the elongated tubular body portion 121 of the nozzle tube 12.
- the first bearing 14 is attached to one end of the reinforcing tube 13 around one end of the elongated tubular body portion 121 of the nozzle tube 12 near the nozzle tip 122 and kept in contact with the inside wall of the spray tube 11.
- the second bearing 15 is attached to the other end of the reinforcing tube 13 around the other end of the elongated tubular body portion 121 of the nozzle tube 12 near the connection portion 112 and kept in contact with the inside wall of the spray tube 11.
- the gasket ring 16 is attached to one side of the second bearing 15 opposite to the reinforcing tube 13 and kept in contact with the inside wall of the spray tube 11 near the connection portion 112.
- a fitting 113 is fixedly mounted in the circular mounting hole 1121 of the connection portion 112 of the spray tube 11.
- the fitting 113 is a metal ring having an inner thread 1131.
- the second bearing 15 which has an outer diameter relatively greater than the first bearing 14 is abutted against the annular step 1122 in the circular mounting hole 1121 of the connection portion 112 of the spray tube 11, and the gasket ring 16 is abutted against the outer side of the first bearing 14 and kept in friction engagement with the inside wall of the connection portion 112 of the spray tube 11 tightly.
- the gasket ring 16 can be a compressible ring made of cotton knit fabric or a ring cushion made of an elastic plastic material.
- the gasket ring 16 firmly secures the second bearing 15 to the annular step 1122 in the circular mounting hole 1121 of the connection portion 112 of the spray tube 11.
- the fitting 113 is fixedly mounted in the circular mounting hole 1121 of the connection portion 112 of the spray tube 11.
- the pray tube 11, the nozzle tube 12, the reinforcing tube 13, the first bearing 14, the second bearing 15, the gasket ring 16 and the fitting 113 are assembled, forming the desired spray tube assembly 1.
- the spray tube assembly 1 is then fastened to the barrel 21 of a spray gun 2 by means of threading the inner thread 1131 of the fitting 113 onto an outer thread 2111 around the periphery of the front connection portion 211 of the barrel 21 of the spray gun 2.
- the spray tube 11 is a hard or rigid tube (made of metal, for example, aluminum, or hard plastics), having high structural strength and toughness.
- the nozzle tube 12 Because the elongated tubular body portion 121 of the nozzle tube 12 is relatively longer than the nozzle tip 122 and supported in the first bearing 14, the reinforcing tube 13 and the second bearing 15, the nozzle tube 12 is forced to rotate at a high speed stably during flowing a high speed flow of compressed air or fluid therethrough.
- the first bearing 14 and the second bearing 15 to support the two distal ends of the elongated tubular body portion 121 and the reinforcing tube 13 to surround the major part of the elongated tubular body portion 121, the nozzle tube 12 does not break or deform during its high speed rotation, assuring high durability.
- the barrel 21 of the spray gun 2 has a water inlet 212 cut through the peripheral wall thereof, and a water supply unit 3 is connected to the water inlet 212 for supplying water to the inside of the barrel 21.
- the water supply unit 3 has a top cap 33, a connection tube 31 perpendicularly extended from the top cap 33 and connected to the water inlet 212 of the barrel 21, a control valve 32 mounted in the connection tube 31 for controlling the water passage defined in the connection tube 31 in communication with the water in the water supply unit 3, and a handle 321 connected to the control valve 32 and biasable to open/close the control valve 32.
- FIG. 7 is an exploded view of a spray tube assembly 1 for rotary spray gun in accordance with a second embodiment of the present invention. Similar to the aforesaid first embodiment, the spray tube assembly 1 according to this second embodiment is comprised of a spray tube 11, a nozzle tube 12, a reinforcing tube 13, a first bearing 14, a second bearing 15 and a gasket ring 16.
- This second embodiment eliminates the fitting 113 of the aforesaid first embodiment (see FIG. 2 ) and has an inner thread 1123 formed in the connection portion 112 of the spray tube 12 for threading onto the outer thread 2111 around the periphery of the front connection portion 211 of the barrel 21 of a spray gun 2.
- the spray tube 11 has two longitudinal locating ribs 114 protruded from the inside wall at two opposite sides, and an inside annular flange 115 protruded from the inside wall near the orifice 111.
- the inside annular flange 115 defines a center hole 1151.
- the nozzle tube 12 has an outer thread 1211 extending around the periphery of one end of the elongated tubular body portion 121 remote from the nozzle tip 122.
- the reinforcing tube 13 has two longitudinal locating grooves 131 located on the periphery at two opposite sides and respectively coupled to the longitudinal locating ribs 114 of the spray tube 11, and two annular locating grooves 132 respectively located on the inside of the front and rear ends thereof for accommodating the first bearing 14 and the second bearing 15 respectively.
- the gasket ring 16 has a shank 161 perpendicularly extended from one side thereof for insertion into the second bearing 15 to hold the second bearing in place 15, and an inner thread 1611 defined in the shank 161 for threading onto the outer thread 1211 of the nozzle tube 12.
- the user can operate the control lever of the spray gun to let a flow of compressed water go through the barrel into the nozzle tube 12.
- a high speed flow of compressed water is flowing through the connection area between the elongated tubular body portion 121 and the nozzle tip 122 of the nozzle tube 12
- an eccentric force is produced, causing rotation of the nozzle tube 12 relative to the spray tube 11, and therefore the output flow of compressed water is forced out of the orifice 111 of the spray tube 11, forming a fine water mist for application.
- the reinforcing tube 13 and the second bearing 15 and because the reinforcing tube 13 has its two longitudinal locating grooves 131 located on the periphery at two opposite sides and respectively coupled to the longitudinal locating ribs 114 of the spray tube 11, the first bearing 14, the reinforcing tube 13 and the second bearing 15 give excellent support to the nozzle tube 12, allowing smooth rotation of the nozzle tube 12 at a high speed relative to the spray tube 11, and therefore the nozzle tube 12 does not break or deform during its high speed rotation, assuring high durability.
- a fitting 113 that defines therein an inner thread 1131 can be tightly press-fitted into the circular mounting hole 1121 of the connection portion 112 of the spray tube 11 for threading onto the outer thread 2111 of the barrel 21 of a spray gun 2.
- an inner thread 1123 can be directly made in the connection portion 112 of the spray tube 11 for threading onto the outer thread 2111 of the barrel 21 of a spray gun 2. It is to be understood that other detachable mounting techniques may be employed for detachable connection between the spray tube 11 and the barrel 21 of a spray gun 2.
- the first bearing 14, the reinforcing tube 13, the second bearing 15 and the gasket ring 16 are sleeved onto the nozzle tube 12 and then inserted with the nozzle tube 12 into the spray tube 11, forming a modularized structure of spray tube assembly for quick connection to the barrel 21 of a spray gun 2 in a detachable manner.
- This design of modularized spray tube assembly 1 facilitates installation and maintenance. When a repair work is necessary, the connection portion 112 of the spray tube 11 can be directly disconnected from the barrel 21 of the spray gun 2, allowing dismounting of the component parts for examination and further replacement or repair work.
- the invention provides a spray tube assembly for rotary spray gun, which has advantages and features as follows:
- a prototype of spray tube assembly for rotary spray gun has been constructed with the features of FIGS. 1 ⁇ 8 .
- the spray tube assembly for rotary spray gun functions smoothly to provide all of the features disclosed earlier.
Abstract
Description
- The present invention relates to a rotary spray gun for cleaning purposes and more particularly, to a spray tube assembly of a rotary spray gun, which is formed by sleeving a first bearing, a reinforcing tube, a second bearing and a gasket ring onto a nozzle tube and then inserting with the nozzle tube into a spray tube to constitute a modularized structure that facilitates installation and maintenance.
- Water spray gun or pistol nozzle is an implement controllable by a control lever to output a forced flow of water. When performing a cleaning work, brushes, wipes, cleaning cloth, and/or many other cleaning tools may be used with a water spray gun or pistol nozzle. Further, after washing with water, a piece of cloth is usually used to dry and clean the washed object. This cleaning method takes much time and labor and consumes a big amount of water. To avoid these problems, rotary spray guns are created.
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FIG. 8 illustrates a known design of rotary spray gun. According to this design, the rotary spray gun A comprises a front barrel A1, a spray tube A12 connected to the front connection endA11 of the front barrel A1, a water tube A13 connected to an external water container and suspending in the front barrel A1, and a nozzle assembly B mounted inside the spray tube A12. The nozzle assembly B comprises a delivery tube B1 connected to the front connection end A11 of the front barrel A1 for input of water from the water tube A13 and a flow of compressed air being guided from an external compressed air source into the front barrel A1, a cylindrical tube B2 mounted in the spray tube A12 around the delivery tube B1, a curved nozzle tip B4, a connector B3 that connects the curved nozzle tip B4 to the delivery tube B1, and bearings B5 mounted in the cylindrical tube B2 to support the delivery tube B1 and the connector B3, allowing rotation of the curved nozzle tip B4 with the cylindrical tube B2 relative to the delivery tube B1. When a flow of water and compressed air mixture is being forced through the curved nozzle tip B4, the curved nozzle tip B4 is forced to rotate with the cylindrical tube B2 relative to the delivery tube B1. - The aforesaid rotary spray gun is functional, however it still has drawbacks as follows:
- 1. The assembly process of the rotary spray gun is complicated. During installation, the delivery tube B1, the cylindrical tube B2, the connector B3 and the curved nozzle tip B4 must be assembled at first so that the nozzle assembly B can be mounted inside the spray tube A12 to have the delivery tube B1 be connected to the front connection end A11 of the front barrel A1. After installation of the nozzle assembly B, the spray tube A12 can then be fastened to the front barrel A1. This installation procedure wastes much time and labor.
- 2. When a flow of water and compressed air mixture is being forced through the curved nozzle tip B4, the curved nozzle tip B4 is forced to rotate with the cylindrical tube B2 relative to the delivery tube B1 at a high speed. During rotation of the curved nozzle tip B4 with the cylindrical tube B2, the delivery tube B1 is caused to vibrate. After a long use of the rotary spray gun, the weight of the cylindrical tube B2, the connector B3 and the curved nozzle tip B4 may cause the delivery tube B1 to break during rotation of the curved nozzle tip B4, resulting in an accident.
- Therefore, it is desirable to provide a measure that eliminates the drawbacks of the aforesaid rotary spray gun.
- The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a spray tube assembly for rotary spray gun, which has a modularized structural design, facilitating installation and maintenance.
- To achieve this and other objects of the present invention, a spray tube assembly comprises a spray tube, a nozzle tube, a first bearing, a reinforcing tube, a second bearing and a gasket ring. The first bearing, the reinforcing tube, the second bearing and the gasket ring are respectively sleeved onto the nozzle tube in proper order and then inserted with the nozzle tube into the spray tube, thereby constituting a modularized structure of spray tube assembly for quick connection to the barrel of a spray gun in a detachable manner. The modularized structure of spray tube assembly facilitates installation and maintenance.
- Further, the gasket ring is abutted against the outer side of the first bearing and kept in friction engagement with the inside wall of the connection portion of the spray tube tightly, securing the second bearing to an annular step in the connection portion of the spray tube firmly and avoiding water leakage..
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FIG. 1 is an elevational assembly view of a spray tube assembly and a barrel for rotary spray gun in accordance with a first embodiment of the present invention. -
FIG. 2 is an exploded view of the assembly shown inFIG. 1 . -
FIG. 3 is a sectional elevation of the spray tube assembly in accordance with the first embodiment of the present invention. -
FIG. 4 is a schematic sectional view showing the spray tube assembly installed in a rotary spray gun according to the first embodiment of the present invention. -
FIG. 5 corresponds toFIG. 4 , showing the nozzle tube rotated in the spray tube during operation of the rotary spray gun. -
FIG. 6 is a schematic sectional view, showing another application example of the spray tube assembly according to the first embodiment of the present invention. -
FIG. 7 is an exploded view of a spray tube assembly in accordance with a second embodiment of the present invention. -
FIG. 8 is a schematic sectional side view of a conventional rotary spray gun. - Referring to
FIGS. 1 and2 , aspray tube assembly 1 for rotary spray gun in accordance with a first embodiment of the present invention is shown comprising aspray tube 11, anozzle tube 12, a reinforcingtube 13, a first bearing 14, a second bearing 15 and agasket ring 16. - The
spray tube 11 is a hollow cylindrical member having one end thereof terminating in anorifice 111 and the other end thereof terminating in aconnection portion 112 that defines acircular mounting hole 1121 and anannular step 1122 at the inner end of thecircular mounting hole 1121. - The
nozzle tube 12 has an elongatedtubular body portion 121 mounted in thespray tube 11 and anozzle tip 122 obliquely extended from one end of the elongatedtubular body portion 121 at an angle and suspending inside thespray tube 11 in proximity to theorifice 111. - The reinforcing
tube 13 is mounted inside thespray tube 11 around the elongatedtubular body portion 121 of thenozzle tube 12. - The first bearing 14 is attached to one end of the reinforcing
tube 13 around one end of the elongatedtubular body portion 121 of thenozzle tube 12 near thenozzle tip 122 and kept in contact with the inside wall of thespray tube 11. - The second bearing 15 is attached to the other end of the reinforcing
tube 13 around the other end of the elongatedtubular body portion 121 of thenozzle tube 12 near theconnection portion 112 and kept in contact with the inside wall of thespray tube 11. - The
gasket ring 16 is attached to one side of the second bearing 15 opposite to the reinforcingtube 13 and kept in contact with the inside wall of thespray tube 11 near theconnection portion 112. - Further, a
fitting 113 is fixedly mounted in thecircular mounting hole 1121 of theconnection portion 112 of thespray tube 11. Thefitting 113 is a metal ring having aninner thread 1131. - Referring to
FIGS. 3 and4 andFIGS. 1 and2 again, during installation of thespray tube assembly 1, sleeve the first bearing 14, the reinforcingtube 13, the second bearing 15 and thegasket ring 16 onto the elongatedtubular body portion 121 of thenozzle tube 12 in proper order, and then aim thenozzle tip 122 of thenozzle tube 12 at theconnection portion 112 of thespray tube 11 axially and insert thenozzle tube 12 into thespray tube 11 to force the first bearing 14, the second bearing 15 and thegasket ring 16 into friction engagement with the inside wall of thespray tube 11. At this time, the second bearing 15 which has an outer diameter relatively greater than the first bearing 14 is abutted against theannular step 1122 in thecircular mounting hole 1121 of theconnection portion 112 of thespray tube 11, and thegasket ring 16 is abutted against the outer side of the first bearing 14 and kept in friction engagement with the inside wall of theconnection portion 112 of thespray tube 11 tightly. Thegasket ring 16 can be a compressible ring made of cotton knit fabric or a ring cushion made of an elastic plastic material. Thus, thegasket ring 16 firmly secures the second bearing 15 to theannular step 1122 in thecircular mounting hole 1121 of theconnection portion 112 of thespray tube 11. Thereafter, thefitting 113 is fixedly mounted in thecircular mounting hole 1121 of theconnection portion 112 of thespray tube 11. Thus, thepray tube 11, thenozzle tube 12, thereinforcing tube 13, the first bearing 14, the second bearing 15, thegasket ring 16 and thefitting 113 are assembled, forming the desiredspray tube assembly 1. - Referring to
FIGS. 3 and4 again, after thespray tube assembly 1 has been assembled, thespray tube assembly 1 is then fastened to thebarrel 21 of aspray gun 2 by means of threading theinner thread 1131 of thefitting 113 onto anouter thread 2111 around the periphery of thefront connection portion 211 of thebarrel 21 of thespray gun 2. - Referring to
FIG. 5 , when the user pressed thecontrol lever 23 of thespray gun 2, a flow of compressed air or fluid is forced into thebarrel 21 through anintake port 22. The intake flow of compressed air or fluid is then guided through the elongatedtubular body portion 121 andnozzle tip 122 of thenozzle tube 12 to the outside of the inside wall of thespray tube 11. When the high speed flow of compressed air of fluid is flowing through the connection area between the elongatedtubular body portion 121 and thenozzle tip 122 of thenozzle tube 12, an eccentric force is produced, causing rotation of thenozzle tube 12 relative to thespray tube 11, and therefore the output flow of compressed air or fluid is forced out of theorifice 111 of thespray tube 11, forming a mist of fine drops of fluid (in the case that compressed fluid is forced through theintake port 22 into the barrel 21) for cleaning things. Further, thespray tube 11 is a hard or rigid tube (made of metal, for example, aluminum, or hard plastics), having high structural strength and toughness. Because the elongatedtubular body portion 121 of thenozzle tube 12 is relatively longer than thenozzle tip 122 and supported in the first bearing 14, the reinforcingtube 13 and the second bearing 15, thenozzle tube 12 is forced to rotate at a high speed stably during flowing a high speed flow of compressed air or fluid therethrough. By means of the first bearing 14 and the second bearing 15 to support the two distal ends of the elongatedtubular body portion 121 and the reinforcingtube 13 to surround the major part of the elongatedtubular body portion 121, thenozzle tube 12 does not break or deform during its high speed rotation, assuring high durability. - Referring to
FIG. 6 , in another application example of the first embodiment of the present invention, thebarrel 21 of thespray gun 2 has awater inlet 212 cut through the peripheral wall thereof, and awater supply unit 3 is connected to thewater inlet 212 for supplying water to the inside of thebarrel 21. Thewater supply unit 3 has atop cap 33, aconnection tube 31 perpendicularly extended from thetop cap 33 and connected to thewater inlet 212 of thebarrel 21, acontrol valve 32 mounted in theconnection tube 31 for controlling the water passage defined in theconnection tube 31 in communication with the water in thewater supply unit 3, and ahandle 321 connected to thecontrol valve 32 and biasable to open/close thecontrol valve 32. When the user pressed thecontrol lever 23 of thespray gun 2, a high speed flow of compressed air is forced into thebarrel 21 through anintake port 22 and then guided through the elongatedtubular body portion 121 andnozzle tip 122 of thenozzle tube 12 to the outside of the inside wall of thespray tube 11. When the high speed flow of compressed air of fluid is flowing through thebarrel 21, a Venturi effect is produced, causing water to be sucked upwards from thewater supply unit 3 into thebarrel 21 and carried by the high speed flow of air through thenozzle tube 12 toward the outside of thespray tube assembly 1. When the high speed flow of air and water mixture is flowing through the connection area between the elongatedtubular body portion 121 and thenozzle tip 122 of thenozzle tube 12, an eccentric force is produced, causing rotation of thenozzle tube 12 relative to thespray tube 11, and therefore a very fine water mist is sprayed out of theorifice 111 of thespray tube 11 for application. -
FIG. 7 is an exploded view of aspray tube assembly 1 for rotary spray gun in accordance with a second embodiment of the present invention. Similar to the aforesaid first embodiment, thespray tube assembly 1 according to this second embodiment is comprised of aspray tube 11, anozzle tube 12, a reinforcingtube 13, afirst bearing 14, asecond bearing 15 and agasket ring 16. This second embodiment eliminates the fitting 113 of the aforesaid first embodiment (seeFIG. 2 ) and has aninner thread 1123 formed in theconnection portion 112 of thespray tube 12 for threading onto theouter thread 2111 around the periphery of thefront connection portion 211 of thebarrel 21 of aspray gun 2. Further, thespray tube 11 has two longitudinal locatingribs 114 protruded from the inside wall at two opposite sides, and an insideannular flange 115 protruded from the inside wall near theorifice 111. The insideannular flange 115 defines acenter hole 1151. Further, thenozzle tube 12 has anouter thread 1211 extending around the periphery of one end of the elongatedtubular body portion 121 remote from thenozzle tip 122. Further, the reinforcingtube 13 has two longitudinal locatinggrooves 131 located on the periphery at two opposite sides and respectively coupled to the longitudinal locatingribs 114 of thespray tube 11, and twoannular locating grooves 132 respectively located on the inside of the front and rear ends thereof for accommodating thefirst bearing 14 and thesecond bearing 15 respectively. Further, thegasket ring 16 has ashank 161 perpendicularly extended from one side thereof for insertion into thesecond bearing 15 to hold the second bearing inplace 15, and aninner thread 1611 defined in theshank 161 for threading onto theouter thread 1211 of thenozzle tube 12. - During installation of the
spray tube assembly 1, set thefirst bearing 14 and thesecond bearing 15 in the two annular locatinggrooves 132 of the reinforcingtube 13 and then sleeve thefirst bearing 14, the reinforcingtube 13, thesecond bearing 15 and thegasket ring 16 onto the elongatedtubular body portion 121 of thenozzle tube 12 in proper order, and then thread theinner thread 1611 of thegasket ring 16 onto theouter thread 1211 of thenozzle tube 121, and then aim thenozzle tip 122 of thenozzle tube 12 at theconnection portion 112 of thespray tube 11 axially and insert thenozzle tube 12 into thespray tube 11 to insert thenozzle tip 122 of thenozzle tube 12 through thecenter hole 1151 of the insideannular flange 115 of thespray tube 11 and to force the two longitudinal locatinggrooves 131 of the reinforcingtube 13 into engagement with the two longitudinal locatingribs 114 of thespray tube 11 respectively. Thus, thepray tube 11, thenozzle tube 12, the reinforcingtube 13, thefirst bearing 14, thesecond bearing 15 and thegasket ring 16 are assembled, forming the desiredspray tube assembly 1. - After connection of the
spray tube assembly 1 to the barrel of a spray gun (not shown), the user can operate the control lever of the spray gun to let a flow of compressed water go through the barrel into thenozzle tube 12. When a high speed flow of compressed water is flowing through the connection area between the elongatedtubular body portion 121 and thenozzle tip 122 of thenozzle tube 12, an eccentric force is produced, causing rotation of thenozzle tube 12 relative to thespray tube 11, and therefore the output flow of compressed water is forced out of theorifice 111 of thespray tube 11, forming a fine water mist for application. Because the elongatedtubular body portion 121 of thenozzle tube 12 is relatively longer than thenozzle tip 122 is supported in thefirst bearing 14, the reinforcingtube 13 and thesecond bearing 15 and because the reinforcingtube 13 has its two longitudinal locatinggrooves 131 located on the periphery at two opposite sides and respectively coupled to the longitudinal locatingribs 114 of thespray tube 11, thefirst bearing 14, the reinforcingtube 13 and thesecond bearing 15 give excellent support to thenozzle tube 12, allowing smooth rotation of thenozzle tube 12 at a high speed relative to thespray tube 11, and therefore thenozzle tube 12 does not break or deform during its high speed rotation, assuring high durability. - As stated above, a fitting 113 that defines therein an
inner thread 1131 can be tightly press-fitted into thecircular mounting hole 1121 of theconnection portion 112 of thespray tube 11 for threading onto theouter thread 2111 of thebarrel 21 of aspray gun 2. Alternatively, aninner thread 1123 can be directly made in theconnection portion 112 of thespray tube 11 for threading onto theouter thread 2111 of thebarrel 21 of aspray gun 2. It is to be understood that other detachable mounting techniques may be employed for detachable connection between thespray tube 11 and thebarrel 21 of aspray gun 2. - In either of the aforesaid two embodiments of the present invention, the
first bearing 14, the reinforcingtube 13, thesecond bearing 15 and thegasket ring 16 are sleeved onto thenozzle tube 12 and then inserted with thenozzle tube 12 into thespray tube 11, forming a modularized structure of spray tube assembly for quick connection to thebarrel 21 of aspray gun 2 in a detachable manner. This design of modularizedspray tube assembly 1 facilitates installation and maintenance. When a repair work is necessary, theconnection portion 112 of thespray tube 11 can be directly disconnected from thebarrel 21 of thespray gun 2, allowing dismounting of the component parts for examination and further replacement or repair work. - In conclusion, the invention provides a spray tube assembly for rotary spray gun, which has advantages and features as follows:
- 1. The
first bearing 14, the reinforcingtube 13, thesecond bearing 15 and thegasket ring 16 are sleeved onto thenozzle tube 12 and then inserted with thenozzle tube 12 into thespray tube 11, forming a modularized structure ofspray tube assembly 1 for quick connection to thebarrel 21 of aspray gun 2 in a detachable manner. Thus, the invention facilitates installation and maintenance. - 2. The invention uses the
first bearing 14, the reinforcingtube 13 and thesecond bearing 15 to give excellent support to the elongatedtubular body portion 121 of thenozzle tube 12, allowing smooth rotation of thenozzle tube 12 at a high speed relative to thespray tube 11, and therefore thenozzle tube 12 does not break or deform during its high speed rotation, assuring high durability. - 3. The
gasket ring 16 is abutted against the outer side of thefirst bearing 14 and kept in friction engagement with the inside wall of theconnection portion 112 of thespray tube 11 tightly, securing thesecond bearing 15 to theannular step 1122 in thecircular mounting hole 1121 of theconnection portion 112 of thespray tube 11 firmly and avoiding water leakage and preventing accumulation of leaked water in the space within thespray tube 11 and outside the reinforcingtube 13. - A prototype of spray tube assembly for rotary spray gun has been constructed with the features of
FIGS. 1∼8 . The spray tube assembly for rotary spray gun functions smoothly to provide all of the features disclosed earlier. - Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
Claims (9)
- A spray tube assembly connected to a barrel of a spray gun used in a rotary spray gun, comprising:a spray tube, said spray tube having an orifice located on one end thereof and a connection portion located on an opposite end thereof, said connection portion defining therein a circular mounting hole for connection to the barrel of said spray gun;a nozzle tube mounted in said spray tube, said nozzle tube having an elongated tubular body portion and a nozzle tip extended from a front end of said elongated tubular body portion an opposite end thereof terminating in at an angle and suspending inside said spray tube in proximity to said orifice;a reinforcing tube mounted inside said spray tube around said elongated tubular body portion of said nozzle tube;a first bearing attached to one end of said reinforcing tube around one end of said elongated tubular body portion of said nozzle tube near said nozzle tip to support rotation of said nozzle tube relative to said spray tube;a second bearing attached to an opposite end of said reinforcing tube around an opposite end of said elongated tubular body portion of said nozzle tube near said connection portion to support rotation of said nozzle tube relative to said spray tube; anda gasket ring attached to one side of said second bearing opposite to said reinforcing tube and kept in contact with the inside wall of said spray tube near said connection portion.
- The spray tube assembly as claimed in claim 1, further comprising a fitting fixedly mounted in the circular mounting hole of said connection portion of said spray tube, said fitting having an inner thread for mounting.
- The spray tube assembly as claimed in claim 1, wherein said spray tube is an aluminum tube.
- The spray tube assembly as claimed in claim 1, wherein fitting is made of cotton knit fabric.
- The spray tube assembly as claimed in claim 1, wherein said connection portion of said spray tube comprises an inner thread formed in said circular mounting hole.
- The spray tube assembly as claimed in claim 1, wherein said spray tube comprises two longitudinal locating ribs protruded from the inside wall thereof at two opposite sides; said reinforcing tube comprises two longitudinal locating grooves located on the periphery thereof at two opposite sides and respectively coupled to the longitudinal locating ribs of said spray tube.
- The spray tube assembly as claimed in claim 1, wherein said spray tube comprises an inside annular flange protruded from the inside wall thereof near said orifice, said inside annular flange defining a center hole for the passing of said nozzle tip of said nozzle tube.
- The spray tube assembly as claimed in claim 1, wherein said nozzle tube comprises an outer thread extending around the periphery of one end thereof remote from said nozzle tip; said gasket ring comprises a shank perpendicularly extended from one side thereof for insertion through said second bearing, and an inner thread defined in said shank for threading onto the outer thread of said nozzle tube.
- The spray tube assembly as claimed in claim 1, wherein said reinforcing tube comprises two annular locating grooves respectively located on the two distal ends thereof for accommodating said first bearing and said second bearing respectively.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW98209263U TWM373239U (en) | 2009-05-26 | 2009-05-26 | Convoluted spray gun head |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2255885A1 true EP2255885A1 (en) | 2010-12-01 |
EP2255885B1 EP2255885B1 (en) | 2015-09-16 |
Family
ID=42315734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10005290.1A Active EP2255885B1 (en) | 2009-05-26 | 2010-05-20 | Spray tube assembly of a rotary spray gun |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2255885B1 (en) |
ES (1) | ES2551747T3 (en) |
TW (1) | TWM373239U (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012101623U1 (en) | 2011-10-28 | 2012-06-11 | Bendel Werkzeuge Inh. Frank Bendel | Spray nozzle assembly for air operated cleaning equipment |
ITPN20110032A1 (en) * | 2011-05-13 | 2012-11-14 | Me Ga Plastic S R L | STEAM JET GUN FOR SURFACE CLEANING |
CN102921672A (en) * | 2012-10-29 | 2013-02-13 | 昆山市力格自动化设备有限公司 | Multi-angle air-blowing device |
EP2695676A1 (en) * | 2012-08-10 | 2014-02-12 | Strong Fortress Tool Co., Ltd. | Rotary spraying device |
CN104525416A (en) * | 2014-12-31 | 2015-04-22 | 徐州建机工程机械有限公司 | Tower crane slewing bearing washer spraying protective device |
US9144810B2 (en) | 2012-07-04 | 2015-09-29 | Christopher John Bosua | Atomizing nozzle assembly for pneumatically operated cleaning equipment |
US9597694B2 (en) | 2015-07-14 | 2017-03-21 | Tornadatech LLC | Pneumatic ported atomizing fluid delivery manifold |
US10182696B2 (en) | 2012-09-27 | 2019-01-22 | Dehn's Innovations, Llc | Steam nozzle system and method |
US10189034B2 (en) | 2007-09-04 | 2019-01-29 | Dehn's Innovations, Llc | Nozzle system and method |
ES2721785A1 (en) * | 2018-02-02 | 2019-08-05 | Perez Daniel Cortavitarte | Extendable and articulated rotary head of pressurized air spray gun (Machine-translation by Google Translate, not legally binding) |
US10562078B2 (en) | 2013-07-01 | 2020-02-18 | Ecp Incorporated | Vacuum spray apparatus and uses thereof |
CN112317144A (en) * | 2020-10-28 | 2021-02-05 | 广东创智智能装备有限公司 | Quick blowing nozzle |
US11931760B2 (en) | 2018-08-14 | 2024-03-19 | Ecp Incorporated | Spray head structure |
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DE1806634A1 (en) * | 1968-11-02 | 1970-05-27 | Meier & Co Robert | Spraying and spraying device and portal-like washing or spraying frame |
WO1996013333A1 (en) * | 1994-10-31 | 1996-05-09 | Jet Blast Products Corp. | Nozzle system |
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2009
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- 2010-05-20 EP EP10005290.1A patent/EP2255885B1/en active Active
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DE1806634A1 (en) * | 1968-11-02 | 1970-05-27 | Meier & Co Robert | Spraying and spraying device and portal-like washing or spraying frame |
WO1996013333A1 (en) * | 1994-10-31 | 1996-05-09 | Jet Blast Products Corp. | Nozzle system |
US20030029933A1 (en) * | 2001-02-27 | 2003-02-13 | Kaga Hasegawa | Fluid spraying apparatus, method, and container |
EP1857190A1 (en) * | 2005-03-08 | 2007-11-21 | GA-REW Corporation | Fluid squirt gun and cleaning apparatus utilizing the same |
WO2007131533A1 (en) * | 2006-05-17 | 2007-11-22 | Jaeger Anton | Flexible, oscillating nozzle for ejecting a fluid |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10730062B2 (en) | 2007-09-04 | 2020-08-04 | Ecp Incorporated | Nozzle system and method |
US10343177B1 (en) | 2007-09-04 | 2019-07-09 | Ecp Incorporated | Nozzle system and method |
US10189034B2 (en) | 2007-09-04 | 2019-01-29 | Dehn's Innovations, Llc | Nozzle system and method |
ITPN20110032A1 (en) * | 2011-05-13 | 2012-11-14 | Me Ga Plastic S R L | STEAM JET GUN FOR SURFACE CLEANING |
DE202012101623U1 (en) | 2011-10-28 | 2012-06-11 | Bendel Werkzeuge Inh. Frank Bendel | Spray nozzle assembly for air operated cleaning equipment |
EP2587082A1 (en) | 2011-10-28 | 2013-05-01 | Bendel Werkzeuge Inhaber Frank Bendel | Injection nozzle component for compressed air-operated cleaning devices |
WO2013060794A1 (en) | 2011-10-28 | 2013-05-02 | Bendel Werkzeuge Inh. Frank Bendel | Spray nozzle assembly for compressed air-operated cleaning devices |
US9144810B2 (en) | 2012-07-04 | 2015-09-29 | Christopher John Bosua | Atomizing nozzle assembly for pneumatically operated cleaning equipment |
EP2695676A1 (en) * | 2012-08-10 | 2014-02-12 | Strong Fortress Tool Co., Ltd. | Rotary spraying device |
US11330954B2 (en) | 2012-09-27 | 2022-05-17 | Ecp Incorporated | Steam nozzle system and method |
US10182696B2 (en) | 2012-09-27 | 2019-01-22 | Dehn's Innovations, Llc | Steam nozzle system and method |
CN102921672A (en) * | 2012-10-29 | 2013-02-13 | 昆山市力格自动化设备有限公司 | Multi-angle air-blowing device |
US10562078B2 (en) | 2013-07-01 | 2020-02-18 | Ecp Incorporated | Vacuum spray apparatus and uses thereof |
US11491516B2 (en) | 2013-07-01 | 2022-11-08 | Ecp Incorporated | Vacuum spray apparatus and uses thereof |
CN104525416A (en) * | 2014-12-31 | 2015-04-22 | 徐州建机工程机械有限公司 | Tower crane slewing bearing washer spraying protective device |
US9597694B2 (en) | 2015-07-14 | 2017-03-21 | Tornadatech LLC | Pneumatic ported atomizing fluid delivery manifold |
ES2721785A1 (en) * | 2018-02-02 | 2019-08-05 | Perez Daniel Cortavitarte | Extendable and articulated rotary head of pressurized air spray gun (Machine-translation by Google Translate, not legally binding) |
WO2019149974A1 (en) * | 2018-02-02 | 2019-08-08 | Cortavitarte Perez Daniel | Articulated and extendible rotary head for a pressurised air jet spray gun |
US11931760B2 (en) | 2018-08-14 | 2024-03-19 | Ecp Incorporated | Spray head structure |
CN112317144A (en) * | 2020-10-28 | 2021-02-05 | 广东创智智能装备有限公司 | Quick blowing nozzle |
Also Published As
Publication number | Publication date |
---|---|
EP2255885B1 (en) | 2015-09-16 |
TWM373239U (en) | 2010-02-01 |
ES2551747T3 (en) | 2015-11-23 |
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