Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
  • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
  • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
  • B05B9/043—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump having pump readily separable from container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1001—Piston pumps
  • B05B11/1015—Piston pumps actuated without substantial movement of the nozzle in the direction of the pressure stroke
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/109—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the dispensing stroke being affected by the stored energy of a spring
  • B05B11/1091—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the dispensing stroke being affected by the stored energy of a spring being first hold in a loaded state by locking means or the like, then released
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
  • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
  • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
  • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
  • B05B9/0426—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with a pump attached to the spray gun or discharge device
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
  • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
  • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
  • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
  • B05B9/085—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump
  • B05B9/0877—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being of pressure-accumulation type or being connected to a pressure accumulation chamber
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
  • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
  • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
  • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
  • B05B9/085—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump
  • B05B9/0877—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being of pressure-accumulation type or being connected to a pressure accumulation chamber
  • B05B9/0883—Apparatus to be carried on or by a person, e.g. of knapsack type with a liquid pump the pump being of pressure-accumulation type or being connected to a pressure accumulation chamber having a discharge device fixed to the container
• • 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

Definitions

• the present invention relates to a hand holdable pump spray apparatus and more particularly to a hand holdable pump spray which is reliable, easy to use, safe and inexpensive.
• Non-aerosol pump spraying devices have been developed primarily to eliminate the use of propellants which have a detrimental effect on the environment and to eliminate the use of pressurized containers which pose a safety hazard. Pressurized containers may explode and cause injury, and when the containers have ingredients such as insecticide, weed and grass killer and fertilizer, there may be undesirable environmental affects. Examples of non-aerosol pump spray apparatus may be seen by reference to U.S. Patents Nos. 5,938,116; 5,918,782; 5,860,574; 5,816,447; 5,810,211 and 4 , 174 , 055. A drawback to all of such non-aerosol pump apparatus is that the pump device is located in the container having the liquid to be pumped.
• a hand holdable pump spray apparatus comprising a generally tubular hand holdable housing having first and second end portions spaced apart from a container of liquid to be sprayed, a piston movable m the housing, a handle connected to the piston adapted to be gripped by a user to move the piston toward one end of the housing, a spring located m the housing between the piston and the end of the housing to bias the piston toward the other end of the housing, a chamber formed m the housing between the piston and the other end of the housing, a first valve positioned between the container and the chamber, a nozzle, another valve located between the nozzle and the first valve, and an actuator for opening the second valve whereby liquid m the chamber may be ejected through the nozzle.
• the present invention provides a non-aerosol hand holdable pump spray apparatus having the pump contained m the wand, thereby eliminating prior potential safety hazards relative to pressurized liquid m the flow path.
• Another advantage of the present invention is that it enables elimination of various previously required components.
• Yet another advantage of the present invention is that the pump spray wand and the container combination is relatively inexpensive and that the container is disposable after use but the pump mechanism m the wand is separate and may be reused.
• Still another feature of the present invention is to provide a simple container valve whose position is visually apparent to ensure that the container is sealed when not m use or when it is transported, thereby preventing inadvertent leakage of possibly environmentally hazardous liquids.
• a further feature of the present invention is to enable the container to be emptied more completely than can be accomplished by prior pump spray devices.
• a further object of the present invention is that the wand is reliable, easy to use, inexpensive and safe.
• FIG. 1 is a front elevation view of a hand holdable pump spray system.
• FIG. 2 is an enlarged front elevation view, partially broken away showing a hand holdable pump spray system as it would be m storage or during shipping and further illustrating a container safety valve m a closed position m solid line and m an open position m phantom line .
• FIG. 3 is a sectional view taken along line 3-3 of FIG. 2 but without the hand holdable wand.
• FIG. 4 is an enlarged sectional elevation view of a variation valve cap for the container, where the valve is shown m a closed position.
• FIG. 5 illustrates the valve cap of FIG. 4 with the valve m an open position and connected to a supply tube.
• FIG. 6 is an enlarged front elevation view of an embodiment of a hand holdable pump spray apparatus .
• FIG. 7 is a side elevation view of the hand holdable pump spray apparatus shown m FIG. 6.
• FIG. 8 is a top plan view of the hand holdable pump spray apparatus shown m FIGS . 6 and 7.
• FIG. 9 is a sectional view taken along line 9-9 of FIG. 8.
• FIG. 10 is an enlarged sectional view taken within the circle 10-10 of FIG. 6 showing the valve m the apparatus m a closed position.
• FIG. 11 is a partial view like that shown m FIG. 10 except the illustrated valve is shown m an open position.
• FIG. 12 is an enlarged section view taken along
• FIG. 13 is an enlarged section view taken within the circle 13-13 of FIG. 8.
• FIG. 14 is a section view taken along line 14-
• FIG. 14 of FIG. 13 showing a handle of the hand holdable spray apparatus m a restrained position.
• FIG. 15 is a view of the handle shown m FIG. 14 m an unrestrained position.
• FIG. 16 is an elevation view, partially diagrammatic, of a variation of the present invention with part of the casing removed to show the internal mechanism.
• FIG. 17 is an enlarged sectional elevation view of the variation shown m FIG. 16.
• FIG. 18 is a sectional elevation view of the variation of FIG. 16 illustrating the filling of the hand holdable spray apparatus .
• FIG. 19 is a sectional elevation view of a further embodiment similar to the embodiment shown m FIGS. 16-18 but illustrating the use of a pulley to reduce the force needed to fill the hand held spray apparatus .
• FIG. 20 is a sectional elevation view of the embodiment of FIG. 19 with the handle extended.
• FIG. 21 is an elevation view of another embodiment of the pump spray apparatus of the present invention.
• FIG. 22 s a perspective view of another embodiment of a pump spray apparatus of the present invention.
• FIG. 23 is a perspective view of yet another embodiment of the present invention illustrating a pump SOray apparatus attached to the top of a container.
• the hand holdable non- aerosol pump spray system is defined generally to include a container 10 acting as a liquid reservoir, to which is connected a supply tube 12 which in turn is connected to a hand holdable pump spray apparatus or wand 14.
• a container 10 acting as a liquid reservoir to which is connected a supply tube 12 which in turn is connected to a hand holdable pump spray apparatus or wand 14.
• wand 14 a hand holdable pump spray apparatus
• Another advantage relates to the handling of liquid m the container. Because it may not be desirable to directly touch the liquid m the container 10, even though only a relatively small residual amount is left after use, it is desirable and often necessary to dispose of the container.
• the pump mechanism m the wand By having the pump mechanism m the wand, the wand and the supply tube may be disengaged from the container and used again with a new, completely filled container. The wand and supply tube are simply disconnected from the spent container and the container is sealed using a simple but effective valve. Referring now to FIGS . 2 and 3 , the container will be described m more detail .
• the container may be made of any suitable synthetic resin, such as high density polyethylene, using a blow molding technique, to achieve a container having an integral handle 20, a spout 22 and a storage sleeve or compartment 24.
• a special safety cap 26 is also provided.
• This cap has a pivotal valve 28.
• the pivotal valve provides a safety feature. It allows a user to determine by simple visual inspection whether the valve is open or closed.
• the pivotal valve 28 is connected to the top of the cap 26 which m turn is attached or threaded to the container spout 22.
• the pivotal valve includes a central opening 30 which forms a passageway from a first end 32 of the valve toward an opposite end portion 34. Connected to the end portion 34 m any suitable fashion is the supply tube 12.
• the valve is pivotally mounted to the cap.
• the first end 32 rotates from a position shown m solid line m FIG. 2, where the valve 28 is generally horizontal, as is the central opening 30, to a position shown m phantom lme where the valve 28 is generally vertically aligned.
• This vertical position allows the central opening 30 to align with a liquid transferring internal tube 36 extending downwardly from the cap 26 to or very near the bottom 39 of the container 10.
• This central opening 30 aligned with the internal tube 36 there is a direct passageway between a liquid 38 m the container 10 and the wand 14.
• the passageway extends through the internal tube 36, the valve 28 and the supply tube 12.
• valve 28 when the valve 28 is pivoted to its horizontal position, it can be seen that this passageway is closed or blocked between the internal tube 36 and the supply tube 12. This seals the liquid within the container.
• the pivoting valve is safe, relatively inexpensive and provides by visual inspection immediate information to a user or operator as to whether the container is open or closed.
• a further advantage is that when the container is emptied, except for a residual, the container, the cap, and the internal tube may be properly discarded after the supply tube has been disconnected from the valve 28. It may now be appreciated that the elements of the system being made for disposal are simple and relatively inexpensive while the more complicated and expensive elements, such as the pump m the wand, are reuseable .
• the storage/shipping sleeve 24 is provided to allow storage of the wand 14 when the system is shipped or stored. Between the sleeve and the container is an integral bridge flange 40. The flange provides a base around which the supply tube may be wrapped when the wand is placed m the sleeve. As shown m solid line m FIG. 2, the system is m condition to be shipped m a relatively compact arrangement and, of course, m a non- pressurized state. Again, this feature reduces costs and enhances safety.
• the modified cap 21 has an internal thread 23 for engaging a complementary thread (not shown) about the spout of the container.
• the cap 21 includes an integral sleeve 25 for receiving the upper end portion 27 of the internal tube 36.
• a slot 29 is formed in the top of the cap to which is pivotally mounted a valve element 31.
• the valve element 31 is generally tubular and includes a central passageway 33 for receiving a connector 35 affixed to the end of the supply tube 12.
• the connector has a central opening 45 and may engage the valve element 31 in the central passageway 33 as shown in FIG. 5.
• the valve element also includes an end opening 37 which communicates with the central passageway so that the valve element may have liquid pass through its entire longitudinal length.
• a vent opening 47 is also provided in the cap to allow pressure equalization during use, and a liquid opening 41 is provided to align with the internal tube 36 and the end opening 37 of the valve element 31 as shown in FIG. 5.
• the valve element 31 is closed when in the horizontal position as shown in FIG. 4.
• both the liquid opening 41 and the vent opening 47 are blocked so that the container is sealed.
• the connector must be removed before the container is sealed. This is another safety feature because, if properly used, all of the liquid in the wand and the supply tube will be returned to the container as will be explained below.
• the wand 14 includes a hand holdable tubular housing 44 having a first or left end portion 46 and a second or right end portion 48. Within the housing is a piston 50 movable between the first and the second end portions of the housing.
• the piston Connected to the piston is a handle 54.
• a piston rod 52 joins the piston to the handle.
• the piston includes a front face 58 and a rear face 60. Between the rear face 60 of the piston and the first end portion of the housing is a first coil spring 62 which biases the piston toward the right or second end portion 48 of the housing.
• Attached to the left end portion 46 of the housing is a cap 64.
• Attached to the right end portion 48 of the housing is a nozzle 66.
• the right end portion of the housing also contains two valves, two chambers and two springs.
• a trigger sleeve 68 Surrounding the housing about its right end portion is a trigger sleeve 68 including a thumb lever 70. Adjacent the nozzle 66 is a fluid return mechanism 72 and a connector 74 for engagement with the supply tube.
• a first or mam chamber 80 Located between the front face 58 of the piston 50 and the right end portion 48 of the housing is a first or mam chamber 80 into which the liquid 38 (FIG. 2) from the container is drawn when the handle 54 is moved by a user to the left or away from the cap 64.
• the wand is shown a relaxed or non-pressurized mode as it would be during shipment, storage or when the wand is removed from the container.
• FIGS. 10-12 the relative simplicity and reliability of the pump and spray mechanisms may be seen.
• the sectional view of FIGS. 10 and 11 is of the right end portion 48 of the housing 44.
• the supply tube 12 is attached to the connector 74 which communicates with a second or small chamber 82.
• a first or intake valve 84 commonly called a check valve, which opens one direction usually m response to a pressure differential across the valve.
• a check valve which opens one direction usually m response to a pressure differential across the valve.
• the pressure differential causes the valve to open, as shown m an exaggerated phantom line, and the liquid 38 to move from the container 10 through the supply tube and the small chamber 82 into the mam chamber 80.
• the coil spring 62 (FIG. 9) is steadily compressed.
• the mam chamber 80 When the piston reaches the limit of its travel or the user stops the leftward movement of the handle, the mam chamber 80 is filled with liquid and the spring 62 is completely or partially compressed. This compressed spring provides a biasing force against the rear face 60 of the piston and the liquid, thereby closing the check valve 84.
• a second valve including a valve stem 88 positioned withm the housing at its right end portion.
• the valve stem has a central longitudinal opening 90, a first or left radial passage 92 and a second or right radial passage 94 close to the valve stem nose 93.
• a plug 96 seals the upstream end of the longitudinal opening 90.
• the second valve also includes a first Coring seal 98 positioned about the outer circumference of the valve stem. The seal acts as a valve face.
• the nozzle 66 includes a rounded head 110 having a spray opening 112.
• a third or nozzle chamber 114 Immediately internal to the nozzle and between the nozzle and the valve stem is a third or nozzle chamber 114.
• the nozzle also includes a ring shoulder 116, a ring edge 118 and an external shoulder 119.
• the right end portion 48 of the housing includes a first sleeve portion 120 having an annular flange 122 about the outer circumference of the sleeve portion and an oblique annular surface 124 which functions as part of the second valve by being a valve seat. Between the flange 122 and the ring edge 118 is a second coil spring 126. Positioned about a portion of the nozzle and the sleeve portion 120 is the trigger sleeve 68 which has an annular radially directed flange 130. This flange is constructed to abut the shoulder 119 of the nozzle. If the trigger sleeve is moved to the left by a user's thumb on the lever 70, FIGS.
• the second spring 126 When the user removes his thumb from the thumb lever 70, the second spring 126 will push the ring edge 118 of the nozzle to the right thereby causing both the nozzle and the valve stem to also slide rightwardly, which in turn, causes the valve face 98 and the valve seat 124 to abut each other to block the flow of liquid to the nozzle chamber 114.
• the valve stem 88 includes a longitudinal slot 121 for receiving a longitudinally extending key 123.
• This mechanism is used to allow a user to rotate the nozzle relative to the valve stem while the valve stem is kept rotationally stationary. Nevertheless, the valve stem is allowed to move in a longitudinal direction in response to the rotation of the nozzle.
• the left end portion 46 of the housing 44 is shown in more detail.
• the cap 64 is threadedly engaged with the housing and includes an outer surface 138 and a central opening 139.
• the central opening allows the piston rod 52 to extend beyond the end of the housing.
• the cap includes an arcuate flange 140 extendmg over an acute angle. Integral with the rod is an arcuate radially extending flange 142.
• the piston 50 is its most rightward position as generally shown m FIG. 9, the rod flange and the cap flange are m position to allow the rod flange to be trapped by the cap and the cap flange.
• the cap may also include a flange shape opening 143.
• the rod Since the rod is cylindrical m form, it may be rotated from a trapped or restrained position as shown m FIGS. 13 and 14 to an untrapped or unrestrained position as shown m FIG. 15. In the trapped position, the pump is inoperative and unpressurized. This means that the first spring 62 is m a relaxed or almost relaxed condition. When m the restrained position, the rod flange and the opening 143 align and the rod flange slides into the opening and is restrained against rotation as well as outward linear movement.
• the rod flange moves to the unrestrained position and the wand may be pressurized by the user or operator gripping the handle and pulling it to the left against the force of the compression spring.
• the liquid return mechanism 72 is provided as a safety feature to allow liquid m the mam chamber 80 and the small chamber 82 to return to the container if it is not sprayed through the nozzle. This is done by forcing open the check valve 84.
• the liquid return mechanism includes a plunger 141, an activation button 145 and a third spring 144.
• the plunger 140 rides within a short second sleeve 146 of the housing 44 located m the right end portion 48.
• the button 145 When the button 145 is pressed, it moves to the left by sliding on the outer circumference 148 of the second sleeve 146.
• an internal annular flange of the plunger causing the plunger to push against the check valve 84. This forces the check valve to open allowing the liquid m the mam chamber 80 to enter the small chamber 82 and from there to the supply tube 12.
• a movable piston 210 which travels between the first and the second end portions of the housing.
• a handle 212 is connected to the piston by a rod 214.
• a coil spring 216 is positioned around the rod and provides a biasing force to urge the piston toward the upper end portion 208 of the housing.
• a first or intake valve 222 is positioned at the end of an intake conduit 224 which is shown m diagrammatic form to be connected to a reservoir 226. It is understood that the reservoir may take the form of a liquid holding container, such as the container 10 shown in FIGS. 1 and 2.
• the intake valve consists of a loose ball 230 usually seated on a valve seat 232 and constrained by a cage 234.
• the chamber 220 is created and is at a lower pressure than the pressure on the liquid in the reservoir 226. Because of the pressure differential, the liquid will flow through the conduit 224 unseating the ball from the valve seat 232. The liquid will flow through the cage 234 and enter a second chamber or manifold 240. From there the fluid will enter the chamber 220. In this fashion, the hand holdable pump spray apparatus is primed for operation.
• a second or outlet valve 244 which valve includes a slidable valve element 246, a coil spring 248 and an opening 250 in a conduit 252 which leads to the nozzle.
• An actuator 254 is attached to the outer casing 202.
• the actuator includes an operating button 255, a pivot shaft 256 and an extended arm 258.
• the extended arm is connected to the slidable valve element 246 so that when the operating button 255 is depressed, it and the arm rotate in a counterclockwise direction causing the valve element 246 to slide to the left and compress the spring 248.
• the valve element By sliding to the left, the valve element exposes the opening 250 to the liquid in the chamber and the manifold.
• the coil spring 248 will bias the arm and the button to pivot clockwise thereby returning the valve element 246 to its original position as shown in FIG. 17.
• the hand holdable pump spray apparatus 200 is simple, reliable and inexpensive as well as being easy to use and efficient in operation.
• FIGS. 19 and 20 there is illustrated another embodiment of a hand holdable pump spray apparatus 280 which includes an outer casing 282, a cylindrical housing 284, an internal piston 286 and a handle 288.
• the housing has a first end portion 290 and a second end portion 292.
• the construction of the embodiment is very similar to the embodiment shown in FIGS. 16-18 except that instead of a rod connecting the piston to the handle, there is a cable 294.
• One end 295 of the cable is attached to a lower end 296 of the cylindrical housing while the opposite end 297of the cable is attached to an anchor 298 in the handle.
• a pulley 300 which is mounted to the piston.
• FIGS. 19 and 20 When an operator pulls on the handle to move the piston toward the first end portion, a low pressure chamber 302 is created and the biasing spring 287 is compressed.
• the advantage of the cable and pulley arrangement is that only about half of the force is required on the handle 288 to move the piston when compared to the embodiment of FIGS. 16-18.
• the embodiment in FIGS. 19 and 20 includes an input conduit or tube 303, a first valve 304, a second valve 306 and a nozzle 308. Further, the embodiment of FIGS. 19 and 20 is operated by the identical actuator 310 as already described in relation to FIGS. 16-18.
• FIG. 21 another embodiment of the wand is illustrated.
• This hand holdable pump spray 160 is configured with a pistol grip 162 and a trigger 164.
• a supply tube 166 engages the bottom of the grip.
• a handle 168 is designed to be visually integrated with the remainder of the wand to provide a more aesthetically pleasing unit.
• FIG. 22 there is shown another embodiment of the wand.
• the illustrated wand 180 is similar to the wand of the FIG. 16 embodiment except that the FIG. 21 variation has a pistol grip 182.
• Still another embodiment is shown m FIG. 23 which is similar to the FIG. 1 embodiment except that the wand 190 is attached directly to the liquid container 192.
• the wand in all embodiments may be made of any suitable material such as polypropylene .
• a user first removes the wand 14 from the sleeve 24 and unwraps the supply tube 12 from the bridge flange 40. The user then lifts the end 34 of the valve 28 to open the valve sealing the container. In the alternative structure the user lifts the valve element 31 to open the valve (see FIGS. 4-5) and plugs m the connector 35. Either of these actions communicates the valve with the internal tube 36, and thereby, the liquid 38 m the container 10.
• the user holds the spray apparatus housing 44 m one hand and pulls the handle outward or to the left when viewed m FIGS. 6, 7 and 9. Liquid is drawn into the mam chamber 80, while at the same time the coil spring 62 is compressed.
• the user or operator may release the handle 54 and place his/her hand around the trigger sleeve 68 with his/her thumb on the thumb lever
• the user pulls back on the trigger sleeve 68 causing the nozzle/valve stem combination to slide leftwardly and unseat the valve face 98 from the valve seat 124.
• liquid will flow around the valve stem in the annular space 91, through the radial passage 92, through the longitudinal opening 90, out of the radial passage 94, and into the nozzle chamber 114. From there the liquid will be ejected through the nozzle opening 112.
• the nozzle spray may be adjusted by rotating the nozzle relative to the valve stem so as to change the relative location of the valve stem nose 93 to the nozzle opening 112.
• the liquid will be sprayed out of the nozzle opening 112 as long as the coil spring 62 biases the piston 50 to the right, causing the main chamber 80 to contract .
• the piston will no longer provide pressure on the liquid and the user will have to re- pressurize the wand by again moving the handle 54 to the left thereby compressing the spring 62 again, and enlarging and filling the main chamber 80. This may be done repeatedly until most of the liquid 38 has been drawn out of the container 10.
• the valve 28 or the valve element 31 may be rotated to a horizontal position to seal the container.
• the supply tube 12 and the wand may be removed and the container and residual liquid may be discarded.
• the supply tube and wand may then be reused by connecting the supply tube to a new, fully filled container.
• the button 145 of the fluid return mechanism may be depressed. This causes the plunger 141 to open the check valve 84, allowing the liquid in the main chamber 80 to pass into the small chamber 82 and from there, into the supply tube 12 and back to the container. In this manner the wand is depressurized and the liquid in the wand and supply tube is once again stored m the container. Once the liquid has returned to the container the pivot valve member may be rotated to a horizontal position to seal the container. Also the supply tube may be wrapped about the bridge flange and the wand may be inserted into the storage sleeve 24.

Landscapes

• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Catching Or Destruction (AREA)
• Fertilizing (AREA)
• Reciprocating Pumps (AREA)
• Nozzles (AREA)
• Massaging Devices (AREA)
• Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Applications Claiming Priority (5)

Publications (3)

Family

ID=27038506

Family Applications (1)

Country Status (16)

Families Citing this family (10)

Citations (4)

Family Cites Families (8)

• 2000
  • 2000-12-07 NZ NZ519481A patent/NZ519481A/en unknown
  • 2000-12-07 ES ES00984023T patent/ES2296664T3/es not_active Expired - Lifetime
  • 2000-12-07 CA CA002393687A patent/CA2393687C/en not_active Expired - Lifetime
  • 2000-12-07 JP JP2001543437A patent/JP4377097B2/ja not_active Expired - Lifetime
  • 2000-12-07 WO PCT/US2000/033233 patent/WO2001042129A1/en active IP Right Grant
  • 2000-12-07 HU HU0203272A patent/HUP0203272A3/hu unknown
  • 2000-12-07 AT AT00984023T patent/ATE380158T1/de not_active IP Right Cessation
  • 2000-12-07 DK DK00984023T patent/DK1254072T3/da active
  • 2000-12-07 IL IL15007800A patent/IL150078A0/xx active IP Right Grant
  • 2000-12-07 CZ CZ20021931A patent/CZ20021931A3/cs unknown
  • 2000-12-07 AU AU20703/01A patent/AU759592C/en not_active Expired
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