Rechargeable sprayer

Abstract

A manually operated, hand-held liquid spraying device which includes a non-pressurized, refillable or non-refillable container, is disclosed. The sprayer is a completely contained device wherein an internal cam in one part of the device which is rotated, causes a displacement of a piston, a part of which is a cam follower. piston displacement vacates a chamber which is simultaneously charged with liquid. The piston is moved as a result of the cammed motion against a responsor biasing it. The biased responsor generates a hydraulic pressure on the liquid now in the chamber vacated by the piston, since a check valve traps the liquid in the chamber. The liquid is released from the chamber by depressing a push button device, which action uncovers a port in an outlet conduit permitting liquid to flow from the chamber through the conduit and out through a flow connected nozzle in response to the responsor-urged piston moving down through the liquid in the chamber.

Description

This is a continuation, of application Ser. No. 485,631 filed July 3, 1974 now abandoned. 14 15, forcing liquid 12 up through tube 38 and into outlet conduit 16. The motion of piston 9 is downward along a linear path on the verticle surface 29-a of cam follower 29 in slidable contact with the corresponding verticle surface 30-a of cam 30. When fully discharged sprayer 10 and its various working parts will appear as shown in FIG. 1, i.e., piston 9 ram end 28 occupying chamber 33 and cam follower 29 bottomed on cam 30 in recess 34. Of course, the level of liquid 12 in receptacle 31 will be somewhat lower being diminished by the amount sprayed.

As hereinbefore mentioned, sprayer 10 can be charged to any intermediate position by simply ceasing rotation of container 11. However, when spraying liquid with piston 9 in any position short of that of fully charged, piston 9 will move down cam 30 on follower 29 until it again assumes the position shown in FIG. 1.

There has thus been provided a unique and improved, manually operated spray device, which because of its novel features and ingenious charging mechanism advances the art of spraying significantly. It is therefore believed that from the foregoing description, the mode of operation and assembly thereof will be readily apparent to one skilled in the art, it being also understood that variations in the mode of operation, manufacture and assembly will occur to such skilled artisans without departing from the spirit of the invention. Therefore, what is sought to be protected by Letters Patent is set forth in the claims appended hereto, and no limitations as to modifications and changes are to be placed thereupon except as defined in said appended claims.

Claims

1. A liquid sprayer comprising:

a rotatable container, said container having a receptacle for holding a quantity of liquid, a liquid pressurizing chamber adaptable to receive a charge of liquid, and an opening for filling said receptacle with liquid;

an inlet conduit in said container for conducting said charge from said receptacle to said chamber;

a first fluid control means in said container permitting liquid to flow into said chamber;

a second fluid control means in said container permitting air to flow into said receptacle;

a sprayer cap rotatably connected to said container;

a movable piston in said cap;

compressible means in said cap positioned therein in biasing relationship to said piston;

charging means on said container operatively connected to a portion of said piston such that rotation of said container relative to said cap causes said piston to move in said cap to compress said compressible means and pressurize said charge in said chamber;

a spray nozzle on said cap for discharging liquid from said chamber;

an outlet conduit means for conducting said liquid from said chamber to said spray nozzle;

discharging means in said cap for controlling discharge of liquid from said chamber through said nozzle; and,

guide means on said piston and in said cap for guiding said piston in said cap.

2. The sprayer of claim 1 wherein said compressible means is a biasing member contacting said piston and urging said piston away from said cap.

3. The sprayer of claim 1 further including means mounted under said spray nozzle for rendering said nozzle inoperable in one of two positions and operable in the other of said two positions.

4. The sprayer of claim 1 wherein the charging means is a cam.

5. The sprayer of claim 1 wherein the first fluid control means is a check valve.

6. The sprayer of claim 1 wherein the second fluid control means is a check valve.

7. The sprayer of claim 2 wherein the biasing member is a spring.

8. The sprayer of claim 7 wherein the spring is a coiled spring.

9. The sprayer of claim 7 wherein the spring is a flat spring.

10. The sprayer of claim 1 wherein said opening for filling said receptacle is a recloseable plug.

11. A liquid sprayer comprising a rotatable container, said container having a receptacle for holding a quantity of liquid, a liquid pressurizing chamber, and an opening for filling said receptacle with the liquid;

an inlet conduit in said container for conducting liquid from said receptacle to said chamber;

an inlet check valve in said conduit permitting liquid flow into said chamber;

an air inlet check valve in said container permitting air flow into said receptacle;

a sprayer cap rotatably connected to said container;

a movable piston in said cap;

cam means in said container operatively contacting a portion of said piston for moving said piston in said cap in response to rotation of said container relative to said cap;

a spray nozzle in said cap for discharging said liquid from said container;

an outlet conduit for conveying said liquid from said chamber to said spray nozzle;

a discharge valve in said outlet conduit for controlling discharge of liquid from said chamber through said nozzle;

conduit means in said piston connected to said outlet conduit and said pressurizing chamber for conveying liquid from said chamber to said outlet conduit and to said spray nozzle; and,

responsor means in said cap contacting said piston in a biasing relationship such that said piston is urged away from said cap and into said pressurizing chamber whereby liquid therein is displaced by said piston in said chamber and forced to flow into said conduit means, into said outlet conduit and said spray nozzle for discharge thereat.

12. The sprayer of claim 10 further including means mounted under said spray nozzle for rendering said nozzle inoperable in one of two positions and operable in the other of said two positions.

13. The sprayer of claim 11 wherein the responser is a spring.

14. The sprayer of claim 13 wherein the spring is a coiled spring.

15. The sprayer of claim 13 wherein the spring is a flat spring.

16. The sprayer of claim 11 wherein said opening for filling said receptacle is a recloseable plug.

17. The sprayer of claim 1 in which the outlet conduit means comprises a rigid tube communicating with said chamber.

18. A liquid dispensing device comprising a container adapted to contain a body of liquid to be dispensed and having a tubular side wall and opposite ends, one of said ends being rotatable relative to said tubular wall, a cylinder disposed in said container inwardly of said tubular side wall and in spaced relationship therewith, a piston slidable relative to said cylinder and defining therewith a pressurizable chamber for the liquid to be dispensed, resilient means operatively associated with said piston and biased to tend to produce relative motion between said piston and cylinder in a direction to pressurize said chamber, liquid dispensing means mounted on one of said ends outside said container, first conduit means effectively interconnecting said chamber and said dispensing means, manually operable valve means in said first conduit means for controlling the flow of liquid therethrough, second conduit means interconnecting said body of liquid and said pressurizable chamber, said second conduit means having a check valve therein for preventing flow of liquid from said pressurizable chamber to said body of liquid, cam means for producing relative reciprocating motion of said piston and cylinder in response to rotary movement of said rotatable end and in a direction to compress said resilient means, said cam means comprising a first circular cam effectively secured to said piston and a second circular cam effectively secured to said cylinder, said first and second cams having opposed cam surfaces encircling said resilient means and urged into contact with one another by said resilient means and means for effectively connecting the rotatable end of said container and one of said cams whereby rotation of said rotatable end causes said cam means to produce relative motion of said piston and cylinder to draw liquid from said body of liquid into said pressurizable chamber.

19. In a liquid dispensing device of the type which comprises a container adapted to contain a body of liquid to be dispensed and which is formed in two relatively movable sections, a relatively reciprocable piston and cylinder defining a pressurizable chamber therebetween, resilient means operatively associated with said piston and biased to tend to produce relative motion of said piston and said cylinder in a direction to pressurize said chamber, liquid dispensing means mounted on said container externally thereof, first conduit means effectively interconnecting said chamber and said liquid dispensing means, manually operable valve means in said first conduit means for controlling the flow of liquid therethrough, second conduit means effectively connecting said body of liquid to said chamber, said second conduit means having a check valve therein to prevent flow of liquid from said chamber to said body of liquid, means for effectively connecting one of said movable sections to said piston and means for effectively connecting the other of said movable sections to said cylinder whereby relative motion of said movable sections produce relative movement of said piston and cylinder to compress said resilient means and draw liquid from said body of liquid into said chamber, the improvement which comprises forming said container with said movable sections relatively rotatable, and motion converting means responsive to relative rotation of said sections for producing relative reciprocable movement of said piston and cylinder to draw liquid from said body of liquid into the pressurizable chamber and to pressurize the liquid therein, said motion converting means consisting essentially of a first circular cam effectively connected to said piston and a second circular cam effectively connected to said cylinder, said first and second cams having cooperating cam surfaces urged toward one another by said resilient means and each of said cam surfaces having diametrically opposed high and low points with sloping surfaces between each high and low point whereby relative rotation of said cams produces said relative reciprocating motion of said piston and cylinder.

20. In a liquid dispensing device of the type which comprises a container adapted to contain a body of liquid to be dispensed and which is formed in two relatively rotatable sections, means mounted within said container and including a reciprocable piston and cylinder defining a pressurizable chamber therebetween, spring means operatively associated with said piston and biased to tend to produce motion of said piston with respect to said cylinder in a direction to pressurize said chamber, liquid dispensing means mounted on said container, first conduit means effectively interconnecting said chamber and said liquid dispensing means, the first conduit means having a rigid tube portion communicating with said liquid dispensing means, second conduit means effectively connecting said body of liquid to said chamber, means for effectively connecting one of said movable sections to said piston, means for rigidly connecting the other of said movable sections to said cylinder, first cam means associated with said piston and second cam means associated with said cylinder, said two cam means being urged into contact with one another by said spring means and at least one of said cam means having a cam surface extending around said spring means and provided with a plurality of high points and a plurality of low points with sloping cam surfaces therebetween whereby relative rotation of said movable sections produces movement of said piston to compress said spring means and draw liquid from said body of liquid into said chamber.