EP0572237A1 - Spray gun with dual mode trigger - Google Patents
Spray gun with dual mode trigger Download PDFInfo
- Publication number
- EP0572237A1 EP0572237A1 EP93304087A EP93304087A EP0572237A1 EP 0572237 A1 EP0572237 A1 EP 0572237A1 EP 93304087 A EP93304087 A EP 93304087A EP 93304087 A EP93304087 A EP 93304087A EP 0572237 A1 EP0572237 A1 EP 0572237A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- trigger
- spray gun
- piston
- operating mode
- valve
- 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
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Classifications
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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
- 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
- B05B7/0081—Apparatus supplied with low pressure gas, e.g. "hvlp"-guns; air supplied by a fan
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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
- B05B1/30—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
- B05B1/3033—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 control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
- B05B1/304—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 control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
- B05B1/3046—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 control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
- B05B1/306—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 control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
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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
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
- B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
-
- 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
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
-
- 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
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
- B05B7/1218—With means for adjusting or modifying the action of the controlling means
-
- 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
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
- B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
- B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas
Definitions
- the invention relates to paint spray guns and more particularly to a hand held paint spray gun in which the trigger has two operating modes for turning the gun on and off.
- a typical prior art hand held paint spray gun includes a gun body having a nozzle assembly mounted on one end and having a handle depending from adjacent an opposite end.
- a trigger is attached to the gun body to pivot towards and away from the handle.
- an air valve is opened and then a valve needle is moved to open a fluid valve.
- the air valve supplies any air required for atomization and for shaping the spray pattern. If the trigger is only partially squeezed, the fluid valve may be only partially opened to permit the operator to apply a lighter coating, for example, for feathering when touching up a coating.
- the spray gun also includes an adjustable stop which limits either trigger travel or the valve needle travel to adjust the maximum paint flow from the gun when the trigger is fully squeezed.
- the trigger has a relatively long travel. Consequently, the operator's fingers must move the trigger over a relatively large arc when squeezing or releasing the trigger. Also, a relative high force has been required to overcome friction when squeezing the trigger and to assure that the gun turns off when the trigger is released.
- An aim of the present invention is to provide an improved hand held spray gun having a trigger with dual operating modes which reduces stress on the finger and hand of an operator.
- a hand held liquid spray gun including a gun body having first and second ends, a liquid atomization nozzle assembly secured to the first end, a handle extending from adjacent the second end for holding the spray gun and a main trigger for controlling the discharge of liquid from the spray gun, the spray gun trigger having first and second operating modes, first means responsive to trigger movement for varying the amount of liquid discharged from the spray gun as a function of trigger movement when the trigger is in the first operating mode, and second means responsive to a predetermined small trigger movement when the trigger is in the second operating mode for turning fully on and off the flow of liquid discharged from the spray gun.
- the spray gun 10 generally includes a body 11 having a front end 12 to which a fluid nozzle assembly 13 is secured and having a rear end 14.
- a knob 15 is secured to the rear body end 14 for adjusting the maximum flow of paint from the gun 10.
- a handle 16 depends from the body 11 adjacent the rear end 14.
- a fluid hose 17 and a compressed air hose 18 are shown secured to a lower free end 19 of the handle 16.
- the spray gun 10 is shown as having a main trigger 21 and an optional auxiliary trigger 22.
- the main trigger 21 is mounted to pivot towards and away from the handle 16 and the auxiliary trigger is mounted to pivot towards and away from a top 23 of the gun body 11.
- the main trigger 21 has two distinct operating modes.
- the trigger 21 When the trigger 21 is positioned in the first operating mode as shown in solid lines and an operator gradually squeezes the trigger 21, a mechanical linkage mounted on the gun body 11 gradually opens a valve needle to provide an increasing flow of fluid to the nozzle assembly 13.
- the trigger 21 For the second operating mode, the trigger 21 is pushed radially upwardly towards its pivot point on the gun body 11 and is moved towards the handle 16 to the position shown by the dashed lines 24.
- the trigger 21 engages and moves a push bar 25 to open a valve in the gun body. Opening the valve causes a piston to be pneumatically moved to turn the spray gun 10 fully on.
- the spray gun 10 When the trigger 21 is released, the spray gun 10 is turned off.
- the trigger 21 may be pivoted forward to the position shown by the dashed line 26.
- an area 27 between the trigger 21 and the handle 16 is opened up to permit the operator to grasp the gun body 11 in the area 27 for using the auxiliary trigger 22.
- the auxiliary trigger 22 is particularly useful when the spray gun 10 is aimed downwardly from painting generally horizontal surfaces.
- the spray gun 10 Details of the spray gun 10 are shown in the cross sectional view of Fig. 2.
- a moulded plastic skeleton 28 and an outer cover 29 form the gun body 11 and the handle 16 as an integral unit.
- the nozzle assembly 13 consists of a spray head 30 secured to the front body end 12 by a head retaining ring 31 and an air cap 32 secured to the spray head 30 by a retaining ring 33.
- the air hose 18 is connected to a passageway 34 in the handle 16.
- the fluid hose 17 passes through a passageway 35 in the skeleton 28 and connects to a passage 36 in the spray head 30.
- the passage 36 connects with a chamber 37 which leads to a fluid discharge orifice 38.
- a valve needle 39 is seated in the spray head 30 to close the orifice 38.
- the valve needle 39 extends axially through the gun body 11 to the knob 15.
- Pressurised air is delivered to the handle passageway 34 from the air hose 18.
- a front surface 40 on a piston 41 is normally seated against a surface 42 on an air valve bushing 43 to block the flow of air to a passageway 44 in the gun body 11.
- the passageway 44 is connected for delivering atomization air and pattern shaping air to the spray head 30 and thence to the air cap 32.
- a knob 45 on the gun body 11 controls a pattern shaping air valve 46 to control the discharge of such air from pattern shaping orifices 47 on the air cap 32.
- the piston 41 is part of a piston assembly 48 which includes an air valve stem 49, a compression spring 50, a retainer ring 51, a valve needle seal 52 and a plate 53.
- the piston 41 has a stepped axial bore 54.
- the air valve stem 49 is generally tubular and slides in an axial direction in the piston bore 54.
- An enlarged diameter end flange 55 retains the air valve stem 49 in the bore 54.
- the retainer ring 51 is an internal retainer ring which engages the piston bore 54.
- the compression spring 50 is compressed between the air valve stem flange 55 and the retainer ring 51.
- the seal 52 preferably has a U-shaped cross section and forms a low friction sliding seal between the piston 41 and the valve needle 39 which extends axially through the piston assembly 48.
- the seal 52 is retained by the plate 53.
- a compression spring 56 presses against the plate 53 to cause the piston surface 40 to seat against the surface 42.
- a T-block 57 is positioned to slide in an axial direction on the valve needle 39 forward of the air valve stem 49.
- the T-block 57 has an opening 58 through which the valve needle 39 passes and has two radially directed lugs 59.
- Side portions 60 on an actuator arm 61 are moved to engage the lugs 59 for in turn moving the valve needle 39 to turn on the spray gun 10 when it is operated in a first mode.
- squeezing either the trigger 21 or the auxiliary trigger 22 rotates the actuator arm 61 to urge the T-block 57 towards the rear end 14 of the gun body 11. This pushes on the air valve stem 49, moving the piston surface 40 clear of the surface 42 on the air valve bushing 43. Air then flows between the surfaces 40 and 42 to the passageway 44 and is discharged from the nozzle assembly 13 for atomizing fluid and for shaping the pattern of the atomised fluid in a known manner.
- the plate 53 contacts a collar 62 which is secured to the valve needle 39. Further movement of the piston assembly 48 causes the valve needle 39 to move and pressurised fluid from the fluid hose 17 is discharged from the orifice 38 and atomised.
- the spacing between the piston assembly 48 and the collar 62 when the spray gun 10 is off assures that the flow of atomization and pattern shaping air will start prior to the discharge of fluid from the orifice 38. The amount of fluid discharged will depend on various factors, such as the fluid pressure, the size of the orifice 38, the distance that the valve needle 39 is moved and the properties of the fluid.
- a rear plug 63 is secured to the rear body end 14 and the knob 15 is threaded into the rear plug 63.
- the knob 15 forms an adjustable stop against which the collar 62 abuts when the fluid valve is fully opened. Rotating the knob 15 adjusts the maximum travel of the valve needle 39 when the fluid valve is opened.
- An annular seal 64 fits between the knob 15 and the rear plug 63.
- the spring 56 extends between the plate 53 and the seal 64. The spring 56 functions both as a return spring for the piston assembly 48 and as a spring for maintaining a force on the seal 64 to form a self adjusting air tight seal between the rear plug 63 and the knob 15.
- the spring 56 is located in a chamber 65.
- a small passage 66 in the air valve bushing 43 connects the chamber 65 to the handle passage 34 to allow a limited flow of the pressurised air into the chamber 65.
- a much larger opening 67 in the air valve bushing 43 also allows the pressurised air to flow from the handle passage 34 into a chamber 68 formed between the air valve bushing 43 and the piston 41.
- air pressure is normally balanced on both sides of the piston 41 and the piston 41 does not present an impediment to axial movement of the piston assembly 48 when the spray gun 10 is turned on or off by movement of either of the triggers 21 or 22.
- the rear chamber 65 is connected through a passage 69 to a normally closed valve 70 (Figs. 4 and 5).
- valve 70 opens and the chamber 65 is vented to atmosphere, establishing an air pressure differential across the piston 41.
- the air pressure differential is sufficient to move the piston rearwardly until the collar 62 abuts the knob 15 and the valve needle 39 is fully opened.
- Figs. 4 and 5 show details of the valve 70.
- the passage 69 connects to a chamber 71 in the skeleton 28.
- An annular ridge 72 surrounds the passage 69 to form a seat for the valve 70.
- a compression spring 73 is compressed between the valve 70 and a retainer ring 74 to urge the valve 70 to seal against the ridge 72, closing the passage 69.
- a push bar 25 is secured to the skeleton 28 to slide in an axial direction.
- An end 76 on the valve 70 is engaged by a bumper 77 on the push bar 25.
- a compression spring 78 urges the push bar 25 to the position shown in Fig. 4 wherein the push bar 25 does not affect closure of the valve 70.
- the actuator arm 61 has a generally U-shaped body 85.
- the body 85 consists of an upper portion 86 from which two sides 87 and 88 depend.
- the sides 87 and 88 are spaced to straddle the skeleton 28.
- Aligned openings 89 and 90 extend through the sides 87 and 88, respectively and a tubular portion 91 extends outwardly from each side 87 and 88 around the opening 89 or 90.
- Each side 87 and 88 is shaped into a lower hooked shaped side portion 60 which terminates at a gap 92.
- a rearwardly opening recess 93 is formed in the upper portion 86, as best seen in the cross section of Fig. 2.
- Two aligned pins 94 are integrally formed on opposite sides of the skeleton 28 for mounting the actuator arm 61 and the trigger 21 (one of the pins 94 is shown in Fig. 7).
- the actuator arm 61 is positioned to straddle the skeleton 28 with one of the pins 94 located in each opening 89 and 90 so that the actuator arm 61 can pivot on the gun body 11.
- the trigger 21 has a U-shaped upper portion 95 with two parallel sides 96 which similarly straddle the actuator arm 61.
- the two sides 96 have aligned openings 97 which engage the projections 91 on sides 87 and 88 of the actuator arm 61.
- the openings 97 are formed with two overlapping lobes 98 and 99 with a small apex 100 on one side opposite a smoothly curved side 101.
- the shape of the openings 97 permits the trigger 21 to be in a first position wherein the opening lobes 98 pivot on the projections 91 when the spray gun is in a first operating mode, as shown in Fig. 7.
- the trigger 21 may be pushed upwardly until the projections 91 snap into the second lobe 99 to engage a second operating mode for the spray gun 10, as shown in Fig. 8. Or, the trigger 21 may be pulled downwardly to re-engage the first operating mode.
- a push rod 103 extends between the recess 93 on the top of the actuator arm 61 and a recess 104 on the auxiliary trigger 22 (Fig. 2).
- the push rod 103 is moved towards the front of the spray gun 10 to pivot the actuator arm 61. Consequently, either of the triggers 21 or 22 is capable of pivoting the actuator arm 61 for turning on the spray gun 10.
- the amount of fluid discharged from the spray gun 10 will depend upon how far either trigger 21 or 22 is squeezed when the spray gun is in the first operating mode.
- Fig. 8 is a fragmentary view showing details of the operation of the trigger 21 when positioned in the second operating mode.
- the trigger 21 is pushed upwardly until the actuator arm projections 91 snap into the hole lobes 99 on the trigger sides 96.
- the tabs 102 have the same radial spacing from the axis of the pins 94 and the projections 91 as the gaps 92 on the sides 60 of the actuator arm 61. Consequently, when the trigger 21 is squeezed towards the gun handle 16 (Figs. 1 and 2), the tabs 102 move into the gaps 92 and the actuator arm 61 is not pivoted to actuate the spray gun 10.
- the trigger 21 is positioned as shown in Fig.
- the trigger surface 79 contacts the push bar surface 80 and moves the push bar 25 for opening the valve 70, as shown in Figs. 8 and 10. Consequently, the spray gun 10 will be turned fully on by the resulting movement of the piston 41.
- the auxiliary trigger 22 is still functional for operating the spray gun 10.
- the trigger 21 has no separate return spring.
- the spring 56 pushes the piston 41 to its normally closed position when the trigger 21 is released.
- the force of the spring 56 through the piston 41, the air valve stem 49, the T-block 57 and the actuator arm 61 pivots the trigger 21 to its released position.
- the trigger 21 is held in this position by friction.
- the spring 78 moves the push bar 25 to its normal position when the trigger 21 is released.
- the force of the spring 78 also pivots the trigger to its released position. Since the push bar 25 only moves a short distance when the trigger is squeezed to actuate the gun 10, the released trigger will be returned only a short distance. Consequently, the trigger 21 will be positioned close to the handle 16 and only require a short movement to turn on the spray gun 10 when operated in the second mode and only requires an operating force to overcome friction and the force of the springs 78 and 73.
- Figs. 11 and 12 show a fragmentary portion of the spray gun 10 with the trigger 21 pivoted forward away from the handle 16 to open the area 27 between the handle 16 and the trigger 21.
- Fig. 11 shows the trigger 21 positioned for the first operating mode and moved forward
- Fig. 12 shows the trigger 21 positioned for the second operating mode and moved forward.
- the trigger 21 is held in the forward position by friction or by a suitable detent (not shown).
- a suitable detent not shown.
- valve needle 39 has a diameter ⁇ 0.1 inch ( ⁇ 2.54 mm) at least at the seals to reduce friction. Further, at the seals the valve needle 39 should be polished to an average surface roughness of ⁇ 15 micro inch ( ⁇ 0.0000254 mm).
- the design of the trigger provides a mechanical advantage of about 7:1, while maintaining ergonomic trigger travel and form.
- the air valve formed between the piston surface 40 and the air valve pushing surface 42 has a surface contour which allows full air flow with a shorter trigger travel.
- the air valve is constructed to open at a rate which gives a ration of square inches of flow area per inch of travel for the piston ⁇ 0.65 (419 mm2 of air flow area per 25.4 mm of piston travel), which is three times greater than a typical prior art trigger operated air atomization paint spray gun.
- Fig. 13 shows details of the contours for a preferred design for fluid valve 110.
- the chamber is curved with blend radii to a conic section 111 which connects to a straight section leading to the fluid discharge orifice 38.
- the conic section 111 is in the form of a frustum of a right circular cone having slightly tapered side walls.
- the valve needle 39 has at its forward end, a first conic section 112 which connects with a second, forward section 113.
- the first conic section 112 is in the form of a frustum of a right circular cone having sides tapered at an angle less than the sides of the fluid head section 111.
- the spray head conic section 111 is tapered to have an included vertex angle of about 20° and the valve needle conic section 112 is tapered to have an included vertex angle of about 12°.
- the valve needle sections 112 and 113 join at an annulus 114 which is of a diameter to seat against a central region of the spray head section 111.
- the forward valve needle section 113 is a cone terminating at a vertex 115.
- the section 113 has a vertex angle of about 40°.
- the forward sections 112 and 113 of the valve needle 39 may be formed of a low friction material to minimize friction when the annulus 114 is withdrawn from the spray head section 111 during triggering.
- low friction seals 52 and 107 which have U-shaped cross sections are used to reduce drag forces between the valve needle 39 and the piston 41 and between the piston 41 and the air valve bushing 43, respectively.
- the spray gun 10 may be constructed to require an actuating force no greater than 2 pounds (0.9 Kg) to actuate the gun 10 in the first operating mode and an actuating force no greater than 1 pound (0.45 Kg) when operating the gun in the second operating mode.
- the trigger 21 pivots over an arc of at least 10° when operated in the first mode to permit accurate control of feathering and the trigger 21 pivots over an arc of less than 10° and preferably no greater than 5° when operated in the second mode.
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- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Abstract
Description
- The invention relates to paint spray guns and more particularly to a hand held paint spray gun in which the trigger has two operating modes for turning the gun on and off.
- Many jobs require the use of hand held paint spray guns. These include certain jobs in manufacturing and jobs in automotive refinishing shops, for example. When an operator is required frequently to use a spray gun over a long period of time, the operator may develop fatigue in the hand and wrist. Fatigue can be aggravated by repetitive motions, such as by frequently squeezing the spray gun trigger with the same finger motion, by unbalanced forces on the hand and wrist, by the weight of the gun and by the force required to operate the gun trigger.
- A typical prior art hand held paint spray gun includes a gun body having a nozzle assembly mounted on one end and having a handle depending from adjacent an opposite end. A trigger is attached to the gun body to pivot towards and away from the handle. When an operator holds the gun by the handle and squeezes the trigger, an air valve is opened and then a valve needle is moved to open a fluid valve. The air valve supplies any air required for atomization and for shaping the spray pattern. If the trigger is only partially squeezed, the fluid valve may be only partially opened to permit the operator to apply a lighter coating, for example, for feathering when touching up a coating. The spray gun also includes an adjustable stop which limits either trigger travel or the valve needle travel to adjust the maximum paint flow from the gun when the trigger is fully squeezed. In the prior art hand held spray gun, the trigger has a relatively long travel. Consequently, the operator's fingers must move the trigger over a relatively large arc when squeezing or releasing the trigger. Also, a relative high force has been required to overcome friction when squeezing the trigger and to assure that the gun turns off when the trigger is released.
- An aim of the present invention is to provide an improved hand held spray gun having a trigger with dual operating modes which reduces stress on the finger and hand of an operator.
- According to the present invention there is provided a hand held liquid spray gun including a gun body having first and second ends, a liquid atomization nozzle assembly secured to the first end, a handle extending from adjacent the second end for holding the spray gun and a main trigger for controlling the discharge of liquid from the spray gun, the spray gun trigger having first and second operating modes, first means responsive to trigger movement for varying the amount of liquid discharged from the spray gun as a function of trigger movement when the trigger is in the first operating mode, and second means responsive to a predetermined small trigger movement when the trigger is in the second operating mode for turning fully on and off the flow of liquid discharged from the spray gun.
- An embodiment of a hand held spray gun will now be described, by way of example only, with reference to the accompanying drawings, in which:
- Fig. 1 is a left side elevational view of a paint spray gun according to the invention;
- Fig. 2 is an enlarged longitudinal vertical cross-sectional view through the centre of the paint spray gun of Fig. 1;
- Fig. 3 is an enlarged fragmentary cross-sectional view taken along line 3-3 of Fig. 2 showing a portion of the mechanical linkage for moving the valve needle in a first operating mode;
- Fig. 4 is a cross-sectional view through a trigger actuated valve for operating the spray gun in a second mode, with the valve shown closed;
- Fig. 5 is a cross-sectional view through the trigger actuated valve, similar to Fig. 4, but with the valve shown open;
- Fig. 6 is a perspective view showing details of the actuator arm which moves the valve needle;
- Fig. 7 is a fragmentary left side view showing details of the trigger, the actuator arm and the valve needle assembly, with the trigger positioned for operating the spray gun in the first mode;
- Fig. 8 is a fragmentary left side view, similar to Fig. 7, but with the trigger positioned for operating the spray gun in the second mode;
- Fig. 9 is a fragmentary side elevational view of the spray gun with its cover removed showing the trigger squeezed while in the first operating mode;
- Fig. 10 is a fragmentary side elevational view, similar to Fig. 9, but showing the trigger squeezed while in the second operating mode;
- Fig. 11 is a fragmentary side elevational view, similar to Fig. 9, but showing the trigger in the first operating mode and positioned forward to facilitate using an auxiliary trigger;
- Fig. 12 is a fragmentary side elevational view, similar to Fig. 10, but showing the trigger in the second operating mode and positioned forward to facilitate using the auxiliary trigger; and
- Fig. 13 is an enlarged cross-sectional view showing details of the fluid valve.
- Turning now to Fig. 1 of the drawings, a hand held
paint spray gun 10 is illustrated in accordance with a preferred embodiment of the invention. Thespray gun 10 generally includes a body 11 having afront end 12 to which afluid nozzle assembly 13 is secured and having arear end 14. Aknob 15 is secured to therear body end 14 for adjusting the maximum flow of paint from thegun 10. Ahandle 16 depends from the body 11 adjacent therear end 14. Afluid hose 17 and a compressedair hose 18 are shown secured to a lowerfree end 19 of thehandle 16. However, it will be appreciated that thefluid hose 17 and theair hose 18 may be secured to therear body end 14 or that thefluid hose 17 can be secured to afitting 20 on thenozzle assembly 13 and supported from thehandle end 19. Thespray gun 10 is shown as having amain trigger 21 and an optionalauxiliary trigger 22. Themain trigger 21 is mounted to pivot towards and away from thehandle 16 and the auxiliary trigger is mounted to pivot towards and away from atop 23 of the gun body 11. - As will be described in greater detail below and is shown in detail in the other figures, the
main trigger 21 has two distinct operating modes. When thetrigger 21 is positioned in the first operating mode as shown in solid lines and an operator gradually squeezes thetrigger 21, a mechanical linkage mounted on the gun body 11 gradually opens a valve needle to provide an increasing flow of fluid to thenozzle assembly 13. For the second operating mode, thetrigger 21 is pushed radially upwardly towards its pivot point on the gun body 11 and is moved towards thehandle 16 to the position shown by thedashed lines 24. When thetrigger 21 is subsequently moved a short distance towards thehandle 16, thetrigger 21 engages and moves apush bar 25 to open a valve in the gun body. Opening the valve causes a piston to be pneumatically moved to turn thespray gun 10 fully on. When thetrigger 21 is released, thespray gun 10 is turned off. Optionally, thetrigger 21 may be pivoted forward to the position shown by thedashed line 26. When the trigger is in the forward position, anarea 27 between thetrigger 21 and thehandle 16 is opened up to permit the operator to grasp the gun body 11 in thearea 27 for using theauxiliary trigger 22. Theauxiliary trigger 22 is particularly useful when thespray gun 10 is aimed downwardly from painting generally horizontal surfaces. - Details of the
spray gun 10 are shown in the cross sectional view of Fig. 2. A mouldedplastic skeleton 28 and anouter cover 29 form the gun body 11 and thehandle 16 as an integral unit. Thenozzle assembly 13 consists of aspray head 30 secured to thefront body end 12 by ahead retaining ring 31 and anair cap 32 secured to thespray head 30 by aretaining ring 33. Theair hose 18 is connected to apassageway 34 in thehandle 16. Thefluid hose 17 passes through apassageway 35 in theskeleton 28 and connects to apassage 36 in thespray head 30. Thepassage 36 connects with achamber 37 which leads to afluid discharge orifice 38. Normally, avalve needle 39 is seated in thespray head 30 to close theorifice 38. Thevalve needle 39 extends axially through the gun body 11 to theknob 15. - Pressurised air is delivered to the
handle passageway 34 from theair hose 18. As shown in Figs. 2 and 3, afront surface 40 on apiston 41 is normally seated against asurface 42 on an air valve bushing 43 to block the flow of air to apassageway 44 in the gun body 11. Thepassageway 44 is connected for delivering atomization air and pattern shaping air to thespray head 30 and thence to theair cap 32. Aknob 45 on the gun body 11 controls a pattern shapingair valve 46 to control the discharge of such air frompattern shaping orifices 47 on theair cap 32. - As best shown in Fig. 3, the
piston 41 is part of apiston assembly 48 which includes anair valve stem 49, acompression spring 50, aretainer ring 51, avalve needle seal 52 and aplate 53. Thepiston 41 has a steppedaxial bore 54. Theair valve stem 49 is generally tubular and slides in an axial direction in the piston bore 54. An enlargeddiameter end flange 55 retains theair valve stem 49 in thebore 54. Theretainer ring 51 is an internal retainer ring which engages thepiston bore 54. Thecompression spring 50 is compressed between the airvalve stem flange 55 and theretainer ring 51. Theseal 52 preferably has a U-shaped cross section and forms a low friction sliding seal between thepiston 41 and thevalve needle 39 which extends axially through thepiston assembly 48. Theseal 52 is retained by theplate 53. Acompression spring 56 presses against theplate 53 to cause thepiston surface 40 to seat against thesurface 42. - A T-
block 57 is positioned to slide in an axial direction on thevalve needle 39 forward of theair valve stem 49. The T-block 57 has anopening 58 through which thevalve needle 39 passes and has two radially directed lugs 59.Side portions 60 on anactuator arm 61 are moved to engage thelugs 59 for in turn moving thevalve needle 39 to turn on thespray gun 10 when it is operated in a first mode. As will be discussed in further detail below, squeezing either thetrigger 21 or theauxiliary trigger 22 rotates theactuator arm 61 to urge the T-block 57 towards therear end 14 of the gun body 11. This pushes on theair valve stem 49, moving thepiston surface 40 clear of thesurface 42 on theair valve bushing 43. Air then flows between thesurfaces passageway 44 and is discharged from thenozzle assembly 13 for atomizing fluid and for shaping the pattern of the atomised fluid in a known manner. - As the T-
block 57 moves thepiston assembly 48 further back, theplate 53 contacts acollar 62 which is secured to thevalve needle 39. Further movement of thepiston assembly 48 causes thevalve needle 39 to move and pressurised fluid from thefluid hose 17 is discharged from theorifice 38 and atomised. The spacing between thepiston assembly 48 and thecollar 62 when thespray gun 10 is off assures that the flow of atomization and pattern shaping air will start prior to the discharge of fluid from theorifice 38. The amount of fluid discharged will depend on various factors, such as the fluid pressure, the size of theorifice 38, the distance that thevalve needle 39 is moved and the properties of the fluid. Arear plug 63 is secured to therear body end 14 and theknob 15 is threaded into therear plug 63. Theknob 15 forms an adjustable stop against which thecollar 62 abuts when the fluid valve is fully opened. Rotating theknob 15 adjusts the maximum travel of thevalve needle 39 when the fluid valve is opened. Anannular seal 64 fits between theknob 15 and therear plug 63. Thespring 56 extends between theplate 53 and theseal 64. Thespring 56 functions both as a return spring for thepiston assembly 48 and as a spring for maintaining a force on theseal 64 to form a self adjusting air tight seal between therear plug 63 and theknob 15. - The
spring 56 is located in a chamber 65. Asmall passage 66 in theair valve bushing 43 connects the chamber 65 to thehandle passage 34 to allow a limited flow of the pressurised air into the chamber 65. A muchlarger opening 67 in theair valve bushing 43 also allows the pressurised air to flow from thehandle passage 34 into achamber 68 formed between theair valve bushing 43 and thepiston 41. Thus, air pressure is normally balanced on both sides of thepiston 41 and thepiston 41 does not present an impediment to axial movement of thepiston assembly 48 when thespray gun 10 is turned on or off by movement of either of thetriggers passage 69 to a normally closed valve 70 (Figs. 4 and 5). As will be discussed in greater detail below, when thespray gun 10 is in the second operating mode and thetrigger 21 is squeezed, thevalve 70 opens and the chamber 65 is vented to atmosphere, establishing an air pressure differential across thepiston 41. The air pressure differential is sufficient to move the piston rearwardly until thecollar 62 abuts theknob 15 and thevalve needle 39 is fully opened. - Figs. 4 and 5 show details of the
valve 70. Thepassage 69 connects to achamber 71 in theskeleton 28. Anannular ridge 72 surrounds thepassage 69 to form a seat for thevalve 70. Acompression spring 73 is compressed between thevalve 70 and aretainer ring 74 to urge thevalve 70 to seal against theridge 72, closing thepassage 69. Apush bar 25 is secured to theskeleton 28 to slide in an axial direction. Anend 76 on thevalve 70 is engaged by abumper 77 on thepush bar 25. Acompression spring 78 urges thepush bar 25 to the position shown in Fig. 4 wherein thepush bar 25 does not affect closure of thevalve 70. When thetrigger 21 is positioned for the second operating mode and is squeezed, asurface 79 on thetrigger 21 engages and moves afree end 80 of thepush bar 25, thus causing thevalve 70 to tilt off of the ridge orseat 72, as shown in Fig. 5. When this occurs, thepassage 69 is vented through thechamber 71 to atmosphere to in turn vent the chamber 65 (Fig. 2). When the chamber 65 is vented, the air pressure differential across thepiston 41 moves thepiston 41 against the force of thereturn spring 56 to cause thespray gun 10 to be turned fully on. When thetrigger 21 is released and thevalve 70 is again closed, the pressure in the chamber 65 will become equalised with the pressure in thechamber 68 and thespring 56 and a valveneedle return spring 81 shut off thespray gun 10. - Details for the mechanism for mechanically operating the
spray gun 10 when either of thetriggers actuator arm 61 has a generallyU-shaped body 85. Thebody 85 consists of anupper portion 86 from which twosides sides skeleton 28. Alignedopenings sides tubular portion 91 extends outwardly from eachside opening side side portion 60 which terminates at agap 92. Finally, arearwardly opening recess 93 is formed in theupper portion 86, as best seen in the cross section of Fig. 2. - Two aligned
pins 94 are integrally formed on opposite sides of theskeleton 28 for mounting theactuator arm 61 and the trigger 21 (one of thepins 94 is shown in Fig. 7). Theactuator arm 61 is positioned to straddle theskeleton 28 with one of thepins 94 located in eachopening actuator arm 61 can pivot on the gun body 11. Thetrigger 21 has a U-shapedupper portion 95 with twoparallel sides 96 which similarly straddle theactuator arm 61. The twosides 96 have alignedopenings 97 which engage theprojections 91 onsides actuator arm 61. Theopenings 97 are formed with two overlappinglobes small apex 100 on one side opposite a smoothlycurved side 101. The shape of theopenings 97 permits thetrigger 21 to be in a first position wherein theopening lobes 98 pivot on theprojections 91 when the spray gun is in a first operating mode, as shown in Fig. 7. Thetrigger 21 may be pushed upwardly until theprojections 91 snap into thesecond lobe 99 to engage a second operating mode for thespray gun 10, as shown in Fig. 8. Or, thetrigger 21 may be pulled downwardly to re-engage the first operating mode. - When the
trigger 21 is positioned for the first operating mode, inwardly directedtabs 102 on the trigger sides 96 abut thesides 60 of theactuator arm 61, as shown in Figs. 3 and 7. When thetrigger 21 is squeezed, thetabs 102 push on and pivot theactuator arm 61. Thelugs 59 on the T-block 57 are continued within the curved actuator arm sides 60. Consequently, when theactuator arm 61 pivots due to squeezing thetrigger 21, the T-block 57 is pushed towards the rear of thespray gun 10. This in turn pushes on the air valve stem 49 to move thepiston 41 for initiating air flow to thenozzle assembly 13 and to move thevalve needle 39 to initiate fluid discharge from thenozzle assembly 13. As shown in Figs. 7 and 9, thesurface 79 on thetrigger 21 is spaced to clear thepush bar 25 so that thevalve 70 is not actuated when thetrigger 21 is squeezed while in the first operating mode. - A
push rod 103 extends between therecess 93 on the top of theactuator arm 61 and arecess 104 on the auxiliary trigger 22 (Fig. 2). When theauxiliary trigger 22 is squeezed or pivoted towards the gun body 11, thepush rod 103 is moved towards the front of thespray gun 10 to pivot theactuator arm 61. Consequently, either of thetriggers actuator arm 61 for turning on thespray gun 10. The amount of fluid discharged from thespray gun 10 will depend upon how far either trigger 21 or 22 is squeezed when the spray gun is in the first operating mode. - Fig. 8 is a fragmentary view showing details of the operation of the
trigger 21 when positioned in the second operating mode. Thetrigger 21 is pushed upwardly until theactuator arm projections 91 snap into thehole lobes 99 on the trigger sides 96. When thetrigger 21 is in this position, thetabs 102 have the same radial spacing from the axis of thepins 94 and theprojections 91 as thegaps 92 on thesides 60 of theactuator arm 61. Consequently, when thetrigger 21 is squeezed towards the gun handle 16 (Figs. 1 and 2), thetabs 102 move into thegaps 92 and theactuator arm 61 is not pivoted to actuate thespray gun 10. However, when thetrigger 21 is positioned as shown in Fig. 8 and squeezed, thetrigger surface 79 contacts thepush bar surface 80 and moves thepush bar 25 for opening thevalve 70, as shown in Figs. 8 and 10. Consequently, thespray gun 10 will be turned fully on by the resulting movement of thepiston 41. When themain trigger 21 is positioned in the second operating mode, theauxiliary trigger 22 is still functional for operating thespray gun 10. - The
trigger 21 has no separate return spring. When positioned in the first operating mode as shown in Fig. 7, thespring 56 pushes thepiston 41 to its normally closed position when thetrigger 21 is released. The force of thespring 56 through thepiston 41, theair valve stem 49, the T-block 57 and theactuator arm 61 pivots thetrigger 21 to its released position. Thetrigger 21 is held in this position by friction. When thetrigger 21 is positioned in the second operating mode as shown in Fig. 8, thespring 78 moves thepush bar 25 to its normal position when thetrigger 21 is released. The force of thespring 78 also pivots the trigger to its released position. Since thepush bar 25 only moves a short distance when the trigger is squeezed to actuate thegun 10, the released trigger will be returned only a short distance. Consequently, thetrigger 21 will be positioned close to thehandle 16 and only require a short movement to turn on thespray gun 10 when operated in the second mode and only requires an operating force to overcome friction and the force of thesprings - Figs. 11 and 12 show a fragmentary portion of the
spray gun 10 with thetrigger 21 pivoted forward away from thehandle 16 to open thearea 27 between thehandle 16 and thetrigger 21. Fig. 11 shows thetrigger 21 positioned for the first operating mode and moved forward and Fig. 12 shows thetrigger 21 positioned for the second operating mode and moved forward. Thetrigger 21 is held in the forward position by friction or by a suitable detent (not shown). When thetrigger 21 is in the forward position, the spray gun body 11 is easily grasped between thehandle 16 and thetrigger 21 to faciitate using theauxiliary trigger 22, for example, when aiming thegun 10 downward to spray a horizontal surface. - Various techniques are used in the
spray gun 10 for minimizing the force and the length of the stroke or arc required to operate thetrigger 21 in the first operating mode. Very low trigger force is required for the second operating mode since only a low force is required to operate thevalve 70. It has been found that the trigger operating force is affected by various factors. Reducing the diameter of thevalve needle 39 to a smaller diameter than used in prior art spray gun valve needles reduces the drag area and polishing thevalve needle 39 reduces packing friction. Preferably, thevalve needle 39 has a diameter ≦0.1 inch (≦2.54 mm) at least at the seals to reduce friction. Further, at the seals thevalve needle 39 should be polished to an average surface roughness of ≦15 micro inch (≦0.0000254 mm). The use of a polytetrafluorethylene (Teflon) packing 105 which is loaded by a spring 106 (Fig. 2) reduces friction and automatically adjusts the packing 105 to control packing tightness and to control drag. The design of the trigger provides a mechanical advantage of about 7:1, while maintaining ergonomic trigger travel and form. The air valve formed between thepiston surface 40 and the airvalve pushing surface 42 has a surface contour which allows full air flow with a shorter trigger travel. Preferably, the air valve is constructed to open at a rate which gives a ration of square inches of flow area per inch of travel for the piston ≧0.65 (419 mm² of air flow area per 25.4 mm of piston travel), which is three times greater than a typical prior art trigger operated air atomization paint spray gun. - The contour of the end of the
valve needle 39 which seats in thespray head 30 also provides quick opening of the fluid valve while maintaining consistent feathering control of fluid flow in the first operating mode. Fig. 13 shows details of the contours for a preferred design forfluid valve 110. At a forward end of thefluid chamber 37 in thefluid head 30, the chamber is curved with blend radii to aconic section 111 which connects to a straight section leading to thefluid discharge orifice 38. Theconic section 111 is in the form of a frustum of a right circular cone having slightly tapered side walls. Thevalve needle 39 has at its forward end, a firstconic section 112 which connects with a second,forward section 113. The firstconic section 112 is in the form of a frustum of a right circular cone having sides tapered at an angle less than the sides of thefluid head section 111. Preferably, the sprayhead conic section 111 is tapered to have an included vertex angle of about 20° and the valve needleconic section 112 is tapered to have an included vertex angle of about 12°. Thevalve needle sections annulus 114 which is of a diameter to seat against a central region of thespray head section 111. The forwardvalve needle section 113 is a cone terminating at avertex 115. Preferably, thesection 113 has a vertex angle of about 40°. Theforward sections valve needle 39 may be formed of a low friction material to minimize friction when theannulus 114 is withdrawn from thespray head section 111 during triggering. - Finally, low friction seals 52 and 107 (Figs. 2 and 3) which have U-shaped cross sections are used to reduce drag forces between the
valve needle 39 and thepiston 41 and between thepiston 41 and theair valve bushing 43, respectively. Thespray gun 10 may be constructed to require an actuating force no greater than 2 pounds (0.9 Kg) to actuate thegun 10 in the first operating mode and an actuating force no greater than 1 pound (0.45 Kg) when operating the gun in the second operating mode. Preferably, thetrigger 21 pivots over an arc of at least 10° when operated in the first mode to permit accurate control of feathering and thetrigger 21 pivots over an arc of less than 10° and preferably no greater than 5° when operated in the second mode. - It will be appreciated that various modifications and changes may be made to the above described preferred embodiment of a hand held spray gun without departing from the spirit and the scope of the following claims.
Claims (10)
- A hand held liquid spray gun (10) including a gun body (11) having first (12) and second ends (14), a liquid atomization nozzle assembly (13) secured to the first end (12), a handle (16) extending from adjacent the second end (14) for holding the spray gun (10) and a main trigger (21) for controlling the discharge of liquid from the spray gun (10) the spray gun trigger (21) having first and second operating modes, first means responsive to trigger movement for varying the amount of liquid discharged from the spray gun (10) as a function of trigger movement when the trigger (21) is in the first operating mode, and second means responsive to a predetermined small trigger movement when the trigger is in the second operating mode for turning fully on and off the flow of liquid discharged from the spray gun.
- A hand held liquid spray gun (10) as claimed in Claim 1, characterised by means mounting the trigger (21) on the gun body (11) to pivot towards and away from the handle (16) and wherein the trigger (21) pivots over a range of at least 10° when the trigger (21) is operated in the first mode, and wherein the trigger (21) pivots over a range of less than 10° when it is operated in the second mode.
- A hand held liquid spray gun (10) as claimed in Claim 1, characterised in that the trigger (21) pivots over a range of no greater than 5° when operated in the second mode.
- A hand held liquid spray gun (10) as claimed in Claim 2, and characterised in that the trigger (21) requires an operating force of no greater than 0.9 Kg in the first operating mode and requires an operating force of no greater than 0.45 Kg in the second operating mode.
- A hand held liquid spray gun as claimed in Claim 1, and including valve needle means (39) mounted in the gun body (11) for controlling the discharge of liquid from the spray gun (10), mechanical linkage means for moving the valve needle means (39) in response to movement of the trigger (21) when the trigger is in the first operating mode, piston means (41) for moving the valve needle means (39) between open and closed positions, and valve means for causing the piston means (41) to move the valve needle means (39) to the open position when the trigger (21) is in the second operating mode and squeezed.
- A hand held liquid spray gun (10) as claimed in Claim 5, characterised by means mounting the trigger (21) on the body (11) to pivot towards and away from the handle (16), wherein the trigger (21) has a first position relative to a pivot point on the gun body (11) when in the first operating mode, and the trigger (21) has a second position relative to the pivot point when in the second operating mode.
- A hand held liquid spray gun (10) as claimed in Claim 6, characterised in that the trigger (21) is moveable in a generally radial direction relative to the pivot point between the first and second positions, and including means for retaining the trigger (21) in a selected one of the first and second positions.
- A hand held liquid spray gun (10) as claimed in Claim 6, characterised by means on the trigger (21) for engaging the mechanical linkage to control the spray gun (10) when the trigger (21) is in the first position, and means on the trigger (21) for operating the valve means to control the spray gun when the trigger (21) is in the second position.
- A hand held liquid spray gun (10) as claimed in Claim 5, characterised in that the piston means (41) includes an integral air valve for controlling a flow of atomization and pattern shaping air to the nozzle assembly (13), the piston means (41) moving between a first position wherein the air valve is closed and a second position, the air valve opening to provide a flow of atomization and pattern shaping air when the piston (41) is moved to an intermediate position between the first and second positions, and a return spring (81) urging the piston towards the first position.
- A hand held liquid spray gun as claimed in Claim 3, characterised by means on the piston (41) for engaging the valve needle means (39) when the piston (41) has moved to the intermediate position, and wherein the piston (41) moves the valve needle means (39) to the open position when the piston (41) is moved from the intermediate position to the second position.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/894,730 US5236129A (en) | 1992-05-27 | 1992-05-27 | Ergonomic hand held paint spray gun |
US894730 | 1992-05-27 | ||
US48277 | 1993-04-14 | ||
US08/048,277 US5332159A (en) | 1992-05-27 | 1993-04-14 | Spray gun with dual mode trigger |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0572237A1 true EP0572237A1 (en) | 1993-12-01 |
EP0572237B1 EP0572237B1 (en) | 1996-03-06 |
Family
ID=26725968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93304087A Expired - Lifetime EP0572237B1 (en) | 1992-05-27 | 1993-05-26 | Spray gun with dual mode trigger |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0572237B1 (en) |
JP (1) | JPH0767545B2 (en) |
AT (1) | ATE134905T1 (en) |
DE (1) | DE69301683T2 (en) |
ES (1) | ES2084452T3 (en) |
NO (1) | NO931909L (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0775529A1 (en) * | 1995-11-27 | 1997-05-28 | Ransburg Corporation | Pneumatic trigger valve for spray gun |
EP1586382A2 (en) | 2004-04-15 | 2005-10-19 | Arrow Line S.R.L. | An improved intercept valve for spray guns for water cleaner apparatus |
WO2005097341A1 (en) * | 2004-04-07 | 2005-10-20 | Illinois Tool Works Inc. | Pneumatically operated device having check valve vent |
WO2007146886A2 (en) * | 2006-06-12 | 2007-12-21 | Titan Tool, Inc. | Spray gun for semi-solid slurries |
GB2457489A (en) * | 2008-02-15 | 2009-08-19 | Itw Ltd | Adjustable needle valve seal |
GB2457886A (en) * | 2008-02-26 | 2009-09-02 | Itw Ltd | Ball connector between manifold and spray head |
WO2010080365A1 (en) * | 2008-12-18 | 2010-07-15 | Graco Minnesota Inc. | Tooless needle change spray gun |
CN108405210A (en) * | 2018-04-28 | 2018-08-17 | 佛山市南海定融风动工具实业有限公司 | A kind of pressure sending type demoulding manual spray gun |
WO2018226881A1 (en) * | 2017-06-06 | 2018-12-13 | Greg Latimer | Flow control nozzle |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6554687B2 (en) * | 2014-08-06 | 2019-08-07 | アネスト岩田株式会社 | Spray gun |
CN111515866B (en) * | 2020-06-08 | 2024-05-03 | 李森 | Novel handheld water jet cutting gun |
DE102021131184A1 (en) * | 2021-11-28 | 2023-06-01 | J. Wagner Gmbh | Method of controlling a fan on a sprayer |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US1694078A (en) * | 1927-04-07 | 1928-12-04 | Vilbiss Co | Spray gun |
US2149181A (en) * | 1935-02-21 | 1939-02-28 | Krautzberger Albert | Spray gun for paints and the like |
US3396911A (en) * | 1964-01-27 | 1968-08-13 | Edward O. Norris | Spray gun activation mechanism |
FR2125959A5 (en) * | 1971-02-17 | 1972-09-29 | Economics Lab | |
US3801009A (en) * | 1973-05-29 | 1974-04-02 | J Marshall | Applicator gun for applying hardenable plastic compositions containing fibers |
-
1993
- 1993-05-26 DE DE69301683T patent/DE69301683T2/en not_active Expired - Fee Related
- 1993-05-26 EP EP93304087A patent/EP0572237B1/en not_active Expired - Lifetime
- 1993-05-26 AT AT93304087T patent/ATE134905T1/en not_active IP Right Cessation
- 1993-05-26 ES ES93304087T patent/ES2084452T3/en not_active Expired - Lifetime
- 1993-05-26 NO NO931909A patent/NO931909L/en unknown
- 1993-05-27 JP JP5125869A patent/JPH0767545B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1694078A (en) * | 1927-04-07 | 1928-12-04 | Vilbiss Co | Spray gun |
US2149181A (en) * | 1935-02-21 | 1939-02-28 | Krautzberger Albert | Spray gun for paints and the like |
US3396911A (en) * | 1964-01-27 | 1968-08-13 | Edward O. Norris | Spray gun activation mechanism |
FR2125959A5 (en) * | 1971-02-17 | 1972-09-29 | Economics Lab | |
US3801009A (en) * | 1973-05-29 | 1974-04-02 | J Marshall | Applicator gun for applying hardenable plastic compositions containing fibers |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0775529A1 (en) * | 1995-11-27 | 1997-05-28 | Ransburg Corporation | Pneumatic trigger valve for spray gun |
WO2005097341A1 (en) * | 2004-04-07 | 2005-10-20 | Illinois Tool Works Inc. | Pneumatically operated device having check valve vent |
US7703702B2 (en) | 2004-04-07 | 2010-04-27 | Illinois Tool Works Inc. | Pneumatically operated device having check valve vent and method for making same |
EP1586382A2 (en) | 2004-04-15 | 2005-10-19 | Arrow Line S.R.L. | An improved intercept valve for spray guns for water cleaner apparatus |
CN101466475B (en) * | 2006-06-12 | 2012-07-04 | 泰坦工具公司 | Spray gun for semisolid slurry |
WO2007146886A2 (en) * | 2006-06-12 | 2007-12-21 | Titan Tool, Inc. | Spray gun for semi-solid slurries |
WO2007146886A3 (en) * | 2006-06-12 | 2008-03-13 | Titan Tool Inc | Spray gun for semi-solid slurries |
US9138762B2 (en) | 2006-06-12 | 2015-09-22 | Titan Tool, Inc. | Texture spray gun |
GB2457489A (en) * | 2008-02-15 | 2009-08-19 | Itw Ltd | Adjustable needle valve seal |
GB2457489B (en) * | 2008-02-15 | 2012-10-31 | Itw Ltd | Adjustable needle seal |
US8403589B2 (en) | 2008-02-26 | 2013-03-26 | John Anthony Rogers | Ball lock mounting arrangement |
GB2457886A (en) * | 2008-02-26 | 2009-09-02 | Itw Ltd | Ball connector between manifold and spray head |
CN102215981A (en) * | 2008-12-18 | 2011-10-12 | 格雷索明尼苏达有限公司 | Tooless needle change spray gun |
WO2010080365A1 (en) * | 2008-12-18 | 2010-07-15 | Graco Minnesota Inc. | Tooless needle change spray gun |
CN102215981B (en) * | 2008-12-18 | 2014-04-16 | 格雷索明尼苏达有限公司 | Tooless needle change spray gun |
US8789770B2 (en) | 2008-12-18 | 2014-07-29 | Graco Minnesota Inc. | Tooless needle change spray gun |
WO2018226881A1 (en) * | 2017-06-06 | 2018-12-13 | Greg Latimer | Flow control nozzle |
CN108405210A (en) * | 2018-04-28 | 2018-08-17 | 佛山市南海定融风动工具实业有限公司 | A kind of pressure sending type demoulding manual spray gun |
Also Published As
Publication number | Publication date |
---|---|
NO931909D0 (en) | 1993-05-26 |
NO931909L (en) | 1993-11-29 |
DE69301683D1 (en) | 1996-04-11 |
EP0572237B1 (en) | 1996-03-06 |
JPH0767545B2 (en) | 1995-07-26 |
ATE134905T1 (en) | 1996-03-15 |
DE69301683T2 (en) | 1996-07-18 |
ES2084452T3 (en) | 1996-05-01 |
JPH06312148A (en) | 1994-11-08 |
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