JPH04190865A - Painting gun - Google Patents
Painting gunInfo
- Publication number
- JPH04190865A JPH04190865A JP2321584A JP32158490A JPH04190865A JP H04190865 A JPH04190865 A JP H04190865A JP 2321584 A JP2321584 A JP 2321584A JP 32158490 A JP32158490 A JP 32158490A JP H04190865 A JPH04190865 A JP H04190865A
- Authority
- JP
- Japan
- Prior art keywords
- paint
- nozzle
- painting
- dome
- pressure
- 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.)
- Pending
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
- B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
- B05B15/531—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using backflow
- B05B15/534—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using backflow by reversing the nozzle relative to the supply conduit
Landscapes
- Spray Control Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は自動車等の車両をはじめとし、各種産業用・
家庭用機器製造の塗装工程において使用される、ノズル
詰まり対策を講じた塗装ガンに関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to various industrial applications including vehicles such as automobiles.
The present invention relates to a paint gun that is used in the painting process of manufacturing household appliances and is designed to prevent nozzle clogging.
塗装ガンを使用した塗装工程、特に塗装ロボットによる
噴霧塗装工程中に、塗料中に混入した異物又は塗料の堆
積により、噴霧ノズルのノズル詰まりが発生し、正規の
噴霧パターンでの塗装が出来な（なり、塗装不良となる
場合がたびたび起きる。During the painting process using a paint gun, especially during the spray painting process using a painting robot, the spray nozzle may become clogged due to foreign matter mixed into the paint or buildup of paint, making it impossible to paint with the regular spray pattern ( This often results in paint defects.
このような場合、従来は「塗料噴射ノズル詰り警報装置
」 （実開昭６３−５８６６１号公報）、又は「噴霧ノ
ズルの閉塞検出装置」 （実開平１−１３９８５４号公
報）に記載の装置を用いて、噴霧ノズルのノズル詰まり
を検出し、この装置からの検出信号により、その塗装ラ
インの作動を停止させ、人手によりロボットに装着され
た塗装ガンのノズル部の交換を行なっていた。In such cases, conventionally, a device described in "Paint injection nozzle clogging alarm device" (Utility Model Application No. 63-58661) or "Spray nozzle blockage detection device" (Utility Model Application No. 1-139854) has been used. The system detects clogging of the spray nozzle, stops the operation of the painting line based on the detection signal from this device, and manually replaces the nozzle part of the painting gun attached to the robot.
〔発明が解決しようとする課題］
しかしながら上記のノズル部の交換作業は煩雑であり、
多大な工数を要するばかりでなく、この交換作業自体、
塗装ラインを停止して行こなうことから、多大な塗装ラ
イン停止時間を要していた。[Problem to be solved by the invention] However, the above-mentioned nozzle part replacement work is complicated;
Not only does it require a large amount of man-hours, but the replacement work itself
Since the painting line had to be stopped, a considerable amount of time was required for the painting line to stop.
この発明は塗装ガンによる塗装工程中における噴霧ノズ
ルのノズル詰りを、迅速に解消できる簡便な構成の塗装
ガンを提供することを目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a coating gun with a simple structure that can quickly eliminate clogging of a spray nozzle during a coating process using a coating gun.
上記の課題を解決するためにこの発明は第１図に示すご
とく塗装ガン本体２に螺合し、ドーム状空間のドーム部
１０を形成するように外枠８を設け、そのドーム部１０
の内面と当接し、かつドーム状空間に倣った側面を有す
るノズルホルダ１１を設け、そのノズルホルダ１１の前
後部には噴口９に対応して第１塗料ノズル１２と第２塗
料ノズル１３とをそれぞれ配設している。In order to solve the above problems, the present invention provides an outer frame 8 which is screwed onto the coating gun main body 2 to form a dome part 10 of a dome-shaped space, as shown in FIG.
A nozzle holder 11 is provided which is in contact with the inner surface of the nozzle and has a side surface shaped like a dome-shaped space, and a first paint nozzle 12 and a second paint nozzle 13 are provided at the front and rear of the nozzle holder 11 in correspondence with the spout 9. They are arranged respectively.
さらに又、それら塗料ノズル１２．１３のノズル詰りを
検知して、ノズルホルダ１１の側面より外方に立設した
螺棒２７により第１塗料ノズル１２と第２塗料ノズル１
３の位置を１８０°変位させる制御機構を設けた塗装ガ
ンとしたものである。Furthermore, by detecting nozzle clogging of these paint nozzles 12 and 13, the first paint nozzle 12 and the second paint nozzle 1 are removed by a threaded rod 27 installed outwardly from the side surface of the nozzle holder 11.
This paint gun is equipped with a control mechanism that allows the position No. 3 to be displaced by 180 degrees.
上記の構成としたので塗料噴口９に面した塗料ノズル（
１２又は１３）のオリフィス噴口（２２又は２３）の近
傍に異物又は塗料カスが付着し、一方の塗料ノズルの塗
料流路が一部または前部が閉塞されると、制御機構が作
動し、図示しない駆動源が作動し、これによりベルト２
９、ギア２８を介して螺棒２７が回動するので、ノズル
ホルダ１１は１８０°回動し、閉塞した一方の塗料ノズ
ルと他方の塗料ノーズルの位置が逆になる。With the above configuration, the paint nozzle facing the paint nozzle 9 (
12 or 13) when foreign matter or paint scum adheres to the vicinity of the orifice nozzle (22 or 23) and the paint flow path of one paint nozzle is partially or completely blocked, the control mechanism is activated and the The drive source that does not operate is activated, which causes belt 2 to
9. Since the screw rod 27 rotates via the gear 28, the nozzle holder 11 rotates 180 degrees, and the positions of one closed paint nozzle and the other paint nozzle are reversed.
この状態で閉塞した一方の塗料ノズル近傍より塗料を供
給すると閉塞した塗料ノズルに付着した異物または塗料
カスは剥離されるとともに、１８０″回動じた他方の塗
料ノズルのオリフィス噴口からは塗料噴口９を通って正
規の噴霧パターンで塗料が噴出されるようになる。In this state, when paint is supplied from the vicinity of one of the clogged paint nozzles, foreign matter or paint scum adhering to the clogged paint nozzle is peeled off, and the paint nozzle 9 is released from the orifice of the other paint nozzle, which has been rotated 180". The paint will now be sprayed in a regular spray pattern.
〔実施例］
この発明を実施例により説明すると、第１図は塗装ロボ
ットの先端に配設された本発明による塗装ガンの実施例
の要部縦断面図で、第２図は第１図のＡ−Ａ’線矢視方
向横断面図で、第３図は第１図におけるＢ矢視方向から
見た要部説明図である。[Example] To explain this invention with reference to an example, FIG. 1 is a vertical cross-sectional view of a main part of an embodiment of a coating gun according to the present invention disposed at the tip of a painting robot, and FIG. FIG. 3 is a cross-sectional view taken along line A-A' in the direction of arrow B, and FIG.
塗装ガン１の構成は第１図および第２図に示すように、
塗装ガン本体２と塗装ノズル部２′からなっている。The construction of the coating gun 1 is as shown in FIGS. 1 and 2.
It consists of a painting gun body 2 and a painting nozzle part 2'.
塗装ガン本体２には塗料供給口３と、この塗料供給口３
に連通する塗料室４が設けられている。The paint gun body 2 has a paint supply port 3 and a paint supply port 3.
A paint chamber 4 communicating with is provided.
この塗料室４内には、その前面のガン先端方向に弁座６
が配設され、その後方には摺動自在に弁棒５が配設され
ており、さらに塗料室４の前方に前記弁座６を介して塗
料供給路７が設けられている。Inside this paint chamber 4, there is a valve seat 6 on the front side toward the tip of the gun.
A valve stem 5 is slidably disposed behind the valve stem 5, and a paint supply passage 7 is provided in front of the paint chamber 4 via the valve seat 6.
塗装ノズル部２′は外枠８とノズルホルダ１１等より構
成される。外枠８は塗装ガン本体２の先端に螺合されて
おり、外枠８の内部には略ドーム状に穿設されたドーム
部１０が設けられ、その先端には塗料噴口９が開口され
ている。The coating nozzle section 2' is composed of an outer frame 8, a nozzle holder 11, and the like. The outer frame 8 is screwed to the tip of the paint gun body 2, and a dome portion 10 having a substantially dome shape is provided inside the outer frame 8, and a paint spout 9 is opened at the tip of the dome portion 10. There is.
前記ドーム部１０は前面と後面に平面部を有し、内部に
はその内周面に沿った球面を形成するノズルホルダ１１
が当接して設けられ、ノズルホルダ１１内には第１塗料
ノズル１２と第２塗料ノズル１３がブツシュ１４を介し
て対向する向きに配設されている。The dome part 10 has flat parts on the front and rear faces, and has a nozzle holder 11 inside that forms a spherical surface along the inner circumferential surface of the dome part 10.
are provided in contact with each other, and a first paint nozzle 12 and a second paint nozzle 13 are disposed in opposing directions within the nozzle holder 11 with a bush 14 in between.
第１塗料ノズル１２および第２塗料ノズル１３とブツシ
ュ１４には、それぞれ塗料供給孔１５゜１６、．１７が
穿設されており、第１および第２塗料ノズル１２．１３
の先端には、それぞれ塗料供給孔１５．１７のドーム部
１８．１９と第２図に示す７字状の溝２０．２１とによ
り、オリフィス噴口２２，２３が形成されている。The first paint nozzle 12, the second paint nozzle 13 and the bushing 14 have paint supply holes 15, 16, . 17 are drilled, and the first and second paint nozzles 12.13
Orifice nozzles 22 and 23 are formed at the tips of the paint supply holes 15 and 17 by the dome portions 18 and 19 of the paint supply holes 15 and 17, respectively, and the 7-shaped grooves 20 and 21 shown in FIG.
ノズルホルダ１工と外枠８を覆うように空気ノズル２４
が塗装ガン本体２に螺合した袋ナツト２５により塗装ガ
ン本体２に係合されており、塗装ガン本体２および空気
ノズル２４には、それぞれ空気供給口２６ａ、２６ｂ
（第２図）が穿設されている。なお、空気ノズル２４の
先端において空気供給口２６ｂは中心に向っており、す
なわち、オリフィス噴口２２，２３より出る塗料の噴出
方向と直交する方向に穿設されている。The air nozzle 24 covers the nozzle holder 1 and the outer frame 8.
is engaged with the painting gun body 2 by a cap nut 25 screwed onto the painting gun body 2, and the painting gun body 2 and the air nozzle 24 have air supply ports 26a and 26b, respectively.
(Fig. 2) are drilled. The air supply port 26b at the tip of the air nozzle 24 is directed toward the center, that is, it is perforated in a direction perpendicular to the direction in which paint is ejected from the orifice nozzles 22 and 23.
また前記ノズルホルダ１１には、螺棒２７が螺合され、
螺棒２７は外枠８、空気ノズル２４を挿通して外方に突
出しており、その先端にはノズルホルダ１１回動用のギ
ア２８（第３図参照）が設けられ、このギア２８はベル
ト２９により図示しない塗装ロボットの駆動源に接続さ
れている。なお、この駆動源により前記ギア２８は時計
方向に、あるいは反時計方向に１８０°回動し、第１お
よび第２塗料ノズル１２．１３を所定の位置にセントす
るが、その位置決めは、螺棒２７の中部に凸設された係
合片２７ａが空気ノズル２４に１８ｏ。Further, a threaded rod 27 is screwed into the nozzle holder 11,
The threaded rod 27 passes through the outer frame 8 and the air nozzle 24 and projects outward. A gear 28 (see FIG. 3) for rotating the nozzle holder 11 is provided at the tip of the screw rod 27, and this gear 28 is connected to the belt 29. is connected to a drive source of a painting robot (not shown). The gear 28 is rotated 180° clockwise or counterclockwise by this drive source, and the first and second paint nozzles 12.13 are placed in predetermined positions. An engaging piece 27a protruding from the middle of the air nozzle 24 is connected to the air nozzle 24 at an angle of 18o.
対向する位置に凸設された係合ピン２４ａ、２４ｂに係
合することによりおこなわれる。This is done by engaging with engaging pins 24a and 24b that are protruded at opposing positions.
また、塗料供給口３と加圧塗料源３０を連通ずる配管３
１の近傍には圧力センサ３２が配設されている。この圧
力センサ３２は公知の技術のものであり、第１および第
２塗料ノズル１２．１３のノズル詰りを検出するもので
ある。Also, a pipe 3 that communicates the paint supply port 3 and the pressurized paint source 30 is provided.
A pressure sensor 32 is disposed near 1. This pressure sensor 32 is of known technology and is for detecting nozzle clogging of the first and second paint nozzles 12,13.
塗装ガン１の主要部を上記の構成としたので、塗装ロボ
ットが塗装ガン１により塗料を噴霧塗装するとき、塗料
供給口３の近傍に配設された圧力センサ３２が、上記塗
料の圧力をチエツクしており、塗料噴口９に面した第１
塗料ノズル１２のオリフィス噴口２２（第２図参照）近
傍に、塗料中に混入した異物または塗料カスが付着して
、ノズルの塗料流路が部分的に、或は全部閉塞されると
、塗料圧が上昇し、これを前記圧力センサ３２が検出す
る。Since the main parts of the paint gun 1 are configured as described above, when the paint robot sprays paint with the paint gun 1, the pressure sensor 32 disposed near the paint supply port 3 checks the pressure of the paint. and the first one facing the paint nozzle 9.
If foreign matter mixed in the paint or paint scum adheres to the vicinity of the orifice nozzle 22 (see Figure 2) of the paint nozzle 12 and the paint flow path of the nozzle is partially or completely blocked, the paint pressure will decrease. increases, and the pressure sensor 32 detects this.
圧力センサ３２が、塗料圧が一定以上に上昇したのを検
出すると加圧原料′ａ３０から配管３１、塗装供給口３
を経て塗料室４および塗料供給路７へ到る塗装ラインが
停止し７、塗装ロボットの塗装作業が停止する。When the pressure sensor 32 detects that the paint pressure has increased above a certain level, the pressure is transferred from the pressurized raw material 'a30 to the piping 31 and the paint supply port 3.
The painting line leading to the paint chamber 4 and paint supply path 7 via the paint chamber 4 and the paint supply path 7 is stopped, and the painting work of the painting robot is stopped.
塗装ロボットの塗装作業が停止すると図示しない塗装ロ
ボットの駆動源が作動し、これによりベルト２９が回動
し、ギア２８を介して螺棒７が係合片２７ａと係合ピン
２４ｂとが係合するまで回動するので、ノズルホルダ１
１は１８０°回動し第１塗料ノズル１２と第２塗料ノズ
ル１３の位置が逆になる。When the painting robot stops painting, a drive source (not shown) of the painting robot is activated, which causes the belt 29 to rotate, and the threaded rod 7 engages the engaging piece 27a and the engaging pin 24b via the gear 28. Nozzle holder 1
1 is rotated by 180 degrees, and the positions of the first paint nozzle 12 and the second paint nozzle 13 are reversed.
この状態で再び塗装ラインを作動させ塗料を塗装ガン１
に供給すると、塗料供給路７より吐出された塗料が第１
塗料ノズル１２を直撃することにより、第１塗料ノズル
１２の近傍に付着した異物または塗料カスは剥離され、
第２塗料ノズル１３のオリフィス噴口２３がらは塗料噴
口９を通って、正規の噴霧パターンで塗料を噴出される
ようになる。In this state, operate the painting line again and apply paint to paint gun 1.
When the paint is supplied to the first
By directly hitting the paint nozzle 12, foreign matter or paint scum adhering to the vicinity of the first paint nozzle 12 is peeled off.
The orifice nozzle 23 of the second paint nozzle 13 passes through the paint nozzle 9, and paint is sprayed in a regular spray pattern.
したがって塗料カス等によりノズル部が閉塞しても、ノ
ズル部分を分解・交換しなくてもノズル詰りを解消でき
るから、上記の塗装作業が繰り返し継続して行われ中断
することはない。Therefore, even if the nozzle part is clogged with paint scum or the like, the nozzle clogging can be cleared without disassembling or replacing the nozzle part, so the above-mentioned painting operation is repeated and not interrupted.
この発明は上記の構成としたので、構成が比較的簡単な
、しかもノズル詰りか自動的に解消できてノズル詰りに
対してのノズルの交換・清掃作業を不要とし−、かつラ
イン停止時間を著しく低減できる。Since the present invention has the above-mentioned configuration, the configuration is relatively simple, and nozzle clogging can be automatically resolved, eliminating the need for nozzle replacement or cleaning work in response to nozzle clogging, and significantly reducing line downtime. Can be reduced.
〔発明の効果］
上述のようにこの発明は、塗装ガン本体に螺合し、ドー
ム状空間を形成するように外枠を設け、その外枠の内面
と当接し、かつドーム状空間に倣った側面を有するノズ
ルホルダと そのノズルホルダの前後部のそれぞれに塗
料ノズルとヲ設ケ、かつその塗料ノズルのノズル詰りを
検知して前後の塗料ノズルの位置を１８ｏ°変位させる
制御機構を設けた自動的にノズル詰りを解消する塗装ガ
ンとしたので、比較的簡単な構成でノズル詰りに対して
、従来のように塗装ラインを停止させ、人手によりノズ
ル部の交換をする必要がなくなり、塗装能率の向上、工
数節減に著しい効果が得られる。[Effects of the Invention] As described above, the present invention provides an outer frame which is screwed onto the coating gun body to form a dome-shaped space, and which abuts the inner surface of the outer frame and mimics the dome-shaped space. A nozzle holder with side surfaces, a paint nozzle installed at the front and rear of the nozzle holder, and a control mechanism that detects clogging of the paint nozzle and shifts the position of the front and rear paint nozzles by 18 degrees. The paint gun has a relatively simple configuration and eliminates the need to stop the painting line and replace the nozzle manually when the nozzle is clogged, which improves painting efficiency. A remarkable effect can be obtained in terms of improvement and reduction in man-hours.
第１図はこの発明の要部縦断面図、第２図は第１図Ａ−
Ａ’線横断面図、第３図は第１図におけるＢ矢視方向か
ら見た要部説明図である。
１・・・塗装ガン ２・・・ガン本体３・・・
塗料供給口 ４・・・塗料室５・・・弁棒
６・・・弁座７・・・塗料供給路 ８・
・・外枠９・・・塗料噴口 １０・・・ドーム
部１１・・・ノズルホルダ １２・・・第１塗料ノズ
ル１３・・・第２塗料ノズル １４・・・ブツシュ１５
・・・１２の塗料供給孔
１６・・・１４の塗料供給孔
１７・・・１３の塗料供給孔
１８・・・１５のドーム部 １９・・・１７のドーム部
２０・・・２２の噴口の断面が７字状の溝２１・・・２
３の噴口の断面が７字状の溝２２て１２のオリフィス噴
口
２３・・・１３のオリフィス噴口
２４・・・空気ノズル
２４ａ、２４ｂ・・・保合ピン
２５・・・袋ナツト
２６ａ・・・２の空気供給口
２６ｂ−・・２４の空気供給口
２７・・・螺棒 ２７ａ・・・係合片２８・
・・ギヤ ２９・・・ベルト３０・・・加圧
原料源 ３１・・・配管３２・・・圧カセンサFig. 1 is a vertical sectional view of the main part of this invention, and Fig. 2 is Fig. 1A-
A cross-sectional view taken along the line A' and FIG. 3 are explanatory views of essential parts as seen from the direction of arrow B in FIG. 1...Painting gun 2...Gun body 3...
Paint supply port 4...Paint chamber 5...Valve stem
6... Valve seat 7... Paint supply path 8.
... Outer frame 9 ... Paint spout 10 ... Dome part 11 ... Nozzle holder 12 ... First paint nozzle 13 ... Second paint nozzle 14 ... Button 15
...12 paint supply holes 16...14 paint supply holes 17...13 paint supply holes 18...15 dome parts 19...17 dome parts 20...22 nozzles Groove 21...2 with a 7-shaped cross section
No. 3 orifice nozzle 22 has a 7-shaped cross section, orifice nozzle 23, no. 13 orifice nozzle 24, air nozzle 24a, 24b, retaining pin 25, cap nut 26a, etc. 2 air supply port 26b...24 air supply port 27...Threaded rod 27a...Engaging piece 28...
... Gear 29 ... Belt 30 ... Pressurized raw material source 31 ... Piping 32 ... Pressure sensor
Claims (1)
）に螺合しドーム状空間を有するドーム部（１０）を形
成する外枠（８）と、そのドーム部（１０）の内面と、
当接しドーム状空間に倣った側面を有するノズルホルダ
（１１）と、そのノズルホルダ（１１）の前後部にその
一方が塗装噴口９に対応して配設された第１塗料ノズル
（１２）および第２塗料ノズル（１３）と、ノズルホル
ダ（１１）の側面より外方に立設した螺棒（２７）と、
この螺棒（２７）を時計方向、あるいは反時計方向に１
８０゜回動させる駆動機構と、その塗料ノズル（１２）
、（１３）のノズル詰りを検知して前記駆動機構により
第１塗料ノズル（１２）と第２塗料ノズル（１３）の位
置を１８０゜変位させる制御機構とを有することを特徴
とする塗装ガン。The painting gun body (2) of the painting gun (1) used in the painting process.
), and an outer frame (8) forming a dome part (10) having a dome-shaped space; an inner surface of the dome part (10);
A nozzle holder (11) having a side surface that abuts and imitates a dome-shaped space, a first paint nozzle (12) disposed at the front and rear of the nozzle holder (11), one of which corresponds to the paint nozzle 9; a second paint nozzle (13), a screw rod (27) erected outward from the side surface of the nozzle holder (11),
Rotate this screw rod (27) clockwise or counterclockwise once.
Drive mechanism that rotates 80 degrees and its paint nozzle (12)
, (13) A control mechanism for detecting nozzle clogging and displacing the positions of the first paint nozzle (12) and the second paint nozzle (13) by 180 degrees by the drive mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2321584A JPH04190865A (en) | 1990-11-26 | 1990-11-26 | Painting gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2321584A JPH04190865A (en) | 1990-11-26 | 1990-11-26 | Painting gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04190865A true JPH04190865A (en) | 1992-07-09 |
Family
ID=18134186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2321584A Pending JPH04190865A (en) | 1990-11-26 | 1990-11-26 | Painting gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04190865A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5704548A (en) * | 1996-05-01 | 1998-01-06 | Graves Spray Supply, Inc. | Spray nozzle having air shaping orifices and reversing structure for cleaning |
| US6918546B2 (en) * | 2003-01-17 | 2005-07-19 | Exit Sa | Reversible spray head |
-
1990
- 1990-11-26 JP JP2321584A patent/JPH04190865A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5704548A (en) * | 1996-05-01 | 1998-01-06 | Graves Spray Supply, Inc. | Spray nozzle having air shaping orifices and reversing structure for cleaning |
| US6918546B2 (en) * | 2003-01-17 | 2005-07-19 | Exit Sa | Reversible spray head |
| EP1445030A3 (en) * | 2003-01-17 | 2008-12-17 | LEISI, Marcel | Reversible spray head |
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