Compact battery operated spray head fittable onto existing pump spray containers and providing improved balance
A battery operated spray pump includes a piston pump wherein the axis of the pump is arranged at an angle relative to the axis of the spray discharge and the fluid inlet. In addition the batteries lie substantially on top of the pump rather than behind it. This allows the spray head to assume an overall size which is almost completely within the foot print of the bottle to which it is attached and also provides the spay head with better balance.
This application is related to co-owned co-pending applications Ser. No. 11/034,600 filed Jan. 13, 2005 and Ser. No. 60/624,647 filed Nov. 3, 2004, the complete disclosures of which are hereby incorporated by reference herein.
BACKGROUND OF THE INVENTION1. Field of the Invention
This invention relates broadly to battery operated fluid pumps. More particularly, this invention relates to a compact battery operated fluid pump contained in a spray head which fits onto existing pump spray containers and which exhibits improved balance.
2. State of the Art
Many household and industrial products are sold in containers that include a sprayer. These products include cleansers, insecticides, polishes, waxes, etc. There are several kinds of sprayers used with these products. Perhaps the most common is the manual push button or trigger operated pump which is seen most frequently on liquid cleansers. It has the advantage of being environmentally friendly (i.e. it does not require a propellant) but the disadvantage of requiring the user to repeatedly pump the button or trigger in order to effect spraying. Another well known sprayer is the aerosol can which is sealed and charged with a gas propellant. This sprayer has the advantage that it dispenses fluid in a continuous spray so long as the user holds the button down, but has several disadvantages. One disadvantage is that the can cannot be refilled. Another disadvantage is that depending on the gas used to charge the container, the propellant can be environmentally unfriendly. While environmentally friendly propellants do exist, generally, they do not charge as well as the unfriendly gases. Still another popular sprayer is the air pump sprayer seen most frequently with insecticides and liquid garden products. The air pump sprayer includes a hand operated air pump which is used to charge the container with compressed air. After it is charged, it operates much like an aerosol can. The pump sprayer is environmentally friendly but requires considerable effort to keep charged because air is not as efficient a propellant as environmentally unfriendly gases such as FREON or hydrocarbon gasses.
In recent years there has been some experimentation with battery powered pump sprayers. Most of these devices include a spray mechanism which is similar to the ubiquitous push button (or trigger) pump sprayer but which is coupled to a battery powered electric motor by some type of linkage which converts the rotary action of the motor into an oscillatory motion to drive the pump piston. Many of these battery operated pump sprayers are designed to work only with a specially constructed bottle, i.e. they are not retrofittable to existing pump spray bottles. Many also have weight distribution problems, i.e. they are too heavy on one side and cause the bottle to which they are attached to tip over. This is partially do to the fact that the electrically driven piston pump is relatively long, extending beyond the footprint of the bottle to which it is attached. It is also partially due to the location of the batteries. Some battery operated pump sprayers use small ineffective diaphragm pumps or arrange a piston pump so that it extends down into the spray bottle. While these designs may provide better balance, they give rise to new disadvantages. The diaphragm pumps do not work as well as piston pumps. Arranging the pump inside the bottle displaces liquid in the bottle and subjects pump elements to submersion which requires additional design considerations.
SUMMARY OF THE INVENTIONIt is therefore an object of the invention to provide a battery operated spray pump.
It is another object of the invention to provide a battery operated spray pump that is retrofittable to an existing spray bottle.
It is an additional object of the invention to provide a battery operated spray pump which is compact and does not extend much beyond the foot print of the spray bottle.
It is another object of the invention to provide a battery operated spray pump which is well balanced and less likely to cause the bottle to tip over.
In accord with these objects, which will be discussed in detail below, a battery operated spray pump according to the invention includes a pump having an inlet and an outlet, the outlet defining a pump axis coaxial with the outlet. The pump is mounted inside a spray head having a nozzle, the nozzle defining a discharge axis which is coaxial with the nozzle. According to one aspect of the invention, the pump axis and the discharge axis are neither collinear nor parallel nor perpendicular but are arranged at an angle of 30-60 degrees relative to each other. More particularly, the pump axis is angled up relative to the discharge axis with the pump outlet angled up from and lying above the discharge axis. The pump outlet is therefore coupled to the nozzle by a flexible tube or an elbow. According to another aspect of the invention, the batteries are located on top of the pump. These aspects of the invention allow the spray head to assume an overall size which is almost completely within the foot print of a typical bottle to which it will be attached and also provides the spay head with better balance.
The pump may be substantially the same as either of those disclosed in the previously incorporated applications but modified to allow the pump axis to be arranged at an angle relative to the discharge axis.
Additional objects and advantages of the invention will become apparent to those skilled in the art upon reference to the detailed description taken in conjunction with the provided figures.
BRIEF DESCRIPTION OF THE DRAWINGS
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There have been described and illustrated herein a battery operated spray head retrofittable to existing pump spray containers. While particular embodiments of the invention have been described, it is not intended that the invention be limited thereto, as it is intended that the invention be as broad in scope as the art will allow and that the specification be read likewise. Thus, while two battery powered pumps have been disclosed by incorporation, it will be appreciated that other types of battery powered pumps can be used. It will therefore be appreciated by those skilled in the art that yet other modifications could be made to the provided invention without deviating from its spirit and scope as claimed.
Claims
1. A liquid sprayer for use with a fluid container, said sprayer comprising:
- a housing;
- a nozzle coupled to said housing, said nozzle having a nozzle inlet, a nozzle outlet, and a fixed nozzle axis substantially coaxial with said nozzle outlet;
- a battery powered pump contained within said housing, said pump having a pump inlet, a pump outlet and a pump axis substantially coaxial with said pump outlet, wherein said pump axis and said nozzle axis are neither collinear nor parallel nor perpendicular.
2. The sprayer according to claim 1, further comprising:
- a threaded coupling adapted to couple to a standard bottle, said threaded coupling having a coupling axis, wherein
- said pump inlet has an inlet axis which is not collinear with said coupling axis.
3. The sprayer according to claim 1, further comprising:
- a flexible tube coupling said pump outlet to said nozzle inlet.
4. The sprayer according to claim 2, wherein:
- said inlet axis is not perpendicular to said pump axis.
5. The sprayer according to claim 1, wherein:
- said pump includes a motor and a transmission, said motor being coupled to said transmission and said transmission being coupled to said pump.
6. The sprayer according to claim 5, wherein:
- said pump is a piston pump.
7. The sprayer according to claim 1, wherein:
- said pump axis and said nozzle axis assume an angle of between 30 degrees and 60 degrees.
8. The sprayer according to claim 1, further comprising:
- a battery compartment located on top of said housing and having a removable cover.
9. The sprayer according to claim 8, further comprising:
- at least one battery located in said battery compartment.
10. The sprayer according to claim 9, wherein:
- said battery is substantially parallel to said pump axis.
11. The sprayer according to claim 1, further comprising:
- a bottle coupled to said housing, said bottle being in fluid communication with said pump inlet.
12. The sprayer according to claim 11, wherein:
- said bottle has a footprint and substantially all of said housing lies within said footprint.
13. The sprayer according to claim 9, further comprising:
- a bottle coupled to said housing, said bottle being in fluid communication with said pump inlet.
14. The sprayer according to claim 13, wherein:
- said bottle has a footprint and substantially all of said housing lies within said footprint.
15. The sprayer according to claim 1, further comprising:
- a trigger;
- a battery located in said housing; and
- an electrical switch means electrically coupled to said battery powered pump and said battery for permitting said battery to power said battery powered pump, said electrical switch means being activatable by said trigger.
16. A liquid sprayer for use with a fluid container, said sprayer comprising:
- a housing;
- a nozzle coupled to said housing, said nozzle having a nozzle inlet and a nozzle outlet, said nozzle outlet defining a fixed spray vector pointing in the direction of spray, said spray vector having a horizontal component and a vertical component;
- a pump contained within said housing, said pump having a pump inlet and a pump outlet, said pump outlet defining an outlet vector pointing in the direction of fluid flow from said pump outlet, said outlet vector having a horizontal component and a vertical component, wherein
- said spray vector and said outlet vector are neither collinear nor parallel nor perpendicular, the horizontal component of said outlet vector and the horizontal component of said spray vector pointing in the same direction.
17. The sprayer according to claim 16, wherein:
- said pump inlet defines an inlet vector which is neither parallel to nor collinear with nor orthogonal to said outlet vector.
18. The sprayer according to claim 16, further comprising:
- a flexible tube coupling said pump outlet to said nozzle inlet.
19. The sprayer according to claim 16, wherein:
- said pump is an electrically powered pump.
20. The sprayer according to claim 19, wherein:
- said electrically powered pump includes a motor and a transmission, said motor being coupled to said transmission and said transmission being coupled to said pump.
21. The sprayer according to claim 20, wherein:
- said pump is a piston pump.
22. The sprayer according to claim 16, wherein:
- said spray vector and said outlet vector form an angle of between 30 degrees and 60 degrees.
Type: Application
Filed: Mar 17, 2005
Publication Date: Sep 21, 2006
Inventor: Steve Sweeton (Lake Winnebago, MO)
Application Number: 11/082,403
International Classification: B65D 88/54 (20060101);