Liquid spraying device

Claim 2

A liquid spraying device comprising container means including a receptacle for holding a quantity of liquid and having an opening for filling the receptacle with the liquid, cover means removably mounted on the receptacle to close the opening and including an upwardly extending cylindrical guide, spray head means rotatably mounted on the cover means, slide means movably mounted within the cylindrical guide and operably connected to the spray head means whereby rotation of the spray head means relative to the cover means in a fixed direction moves the slide means upwardly, liquid pressurizing pump means including a cylinder and a piston defining a liquid pressurizing chamber, the cylinder being operably connected in fixed relation to the cover means and the piston being operably connected in fixed relation to the slide means, a spring mounted in the spray head means for biasing the slide means in a direction to decrease the volume of the liquid pressurizing chamber to thereby pressurize liquid therein, an inlet conduit for conducting the liquid in the receptacle to the chamber, an inlet check valve in the conduit, a discharge valve in the spray head means for controlling discharge of pressurized liquid from the chamber in the form of a spray, passage means for communicating the liquid pressurizing chamber with the discharge valve, and a valve mechanism for cutting off the spray immediately before the pressurized quantity of liquid is exhausted.

Claim 3

A liquid spraying device according to claim 1, in which the valve mechanism operates to cut off the spray by letting the pressure out of the liquid pressurizing chamber immediately before the pressurized quantity of liquid is exhausted.

Claim 4

A liquid spraying device according to claim 1, in which the valve mechanism operates to cut off the spray by blocking the communication between the liquid pressurizing chamber and the discharge valve immediately before the pressurized quantity of liquid is exhausted.

Claim 5

A liquid spraying device comprising a container having a reservoir for holding a quantity of liquid and an opening for filling the same with liquid, a cover unit adapted to close the opening and including a cylinder extending downwardly into the container, the cover unit also including a cylindrical guide extending upwardly therefrom and having a pair of diametrically opposite axial grooves formed internally thereof, a spray head rotatably mounted on the cylindrical guide, a slide member mounted in the cylindrical guide for vertical movement therein and including a piston slidably received in the cylinder, the piston and cylinder defining a liquid pressurizing chamber therebetween, the slide member having a sinuous groove formed externally thereof which comprises a pair of diametrically opposite axial sections and a pair of intersecting sections each intersecting at one end the upper end of one axial section and at the other end the lower end of the other axial section, a cylindrical member mounted in the spray head for transmitting the roTational movement of the head to the slide member, two balls each rotatably received in one of the axial grooves of the cylindrical guide and the sinuous groove of the slide member for causing vertical upward movement of the slide member in response to rotation of the spray head, a spring for biasing the slide member in a direction tending to decrease the volume of the liquid pressurizing chamber, an inlet conduit for conducting the liquid in the receptacle to the chamber, an inlet check valve in the conduit, the spray head including a spray nozzle and a discharge valve operable for controlling discharge of liquid under spring pressure from the chamber through the nozzle in the form of a spray, a passage means for communicating the liquid pressurizing chamber with the discharge valve, and a valve mechanism for cutting off the spray immediately before the pressurized quantity of liquid is exhausted.

Claim 6

A liquid spraying device comprising a container having a reservoir for holding a quantity of liquid and an opening for filling the same with liquid, a cover unit adapted to close the opening and including a cylinder extending downwardly into the container, the cover unit also including a cylindrical guide extending upwardly therefrom and having a pair of diametrically opposite axial grooves formed internally thereof, a spray head rotatably mounted on the cylindrical guide, a slide member mounted in the cylindrical guide for vertical movement therein and including a piston slidably received in the cylinder, the piston and cylinder defining a liquid pressurizing chamber therebetween, the slide member having a sinuous groove formed externally thereof which comprises a pair of diametrically opposite axial sections and a pair of intersecting sections each intersecting at one end the upper end of one axial section and at the other end the lower end of the other axial section, a cylindrical member mounted in the spray head for transmitting the roTational movement of the head to the slide member, two balls each rotatably received in one of the axial grooves of the cylindrical guide and the sinuous groove of the slide member for causing vertical upward movement of the slide member in response to rotation of the spray head, a spring for biasing the slide member in a direction tending to decrease the volume of the liquid pressurizing chamber, an inlet conduit for conducting the liquid in the receptacle to the chamber, an inlet check valve in the conduit, the spray head including a spray nozzle and a discharge valve operable for controlling discharge of liquid under spring pressure from the chamber through the nozzle in the form of a spray, a passage means for communicating the liquid pressurizing chamber with the discharge valve, and a valve mechanism for cutting off the spray immediately before the pressurized quantity of liquid is exhausted.

Claim 7

A liquid spraying device according claim 4, in which the passage means comprises a hollow stem formed of rigid material and fixed with respect to the spray head, the piston having a piston ring mounted thereon which is formed with an opening adapted to slidably receive the lower portion of the hollow stem in liquid-tight manner, the hollow stem being of such length that the piston ring leaves the lower end of the hollow stem immediately before the pistron reaches its lowermost position, the piston and cylinder having side openings formed therein, the valve mechanism being provided by the piston ring, the lower portion of the hollow stem and the two side openings.

Claim 8

A liquid spraying device according to claim 4, in which the passage means comprises a flexible tube connected at its upper end to the discharge valve and at its lower end to the piston.

Claim 9

A liquid spraying device according to claim 6, in which the valve mechanism comprises a body having a bore communicating with the receptacle through the inlet conduit, the body being held in place on the bottom of the cylinder and having a side port communicating with the bore, and a valve member mounted on the body and having a wall which is normally held against the body to close the side port, the valve member being provided with a projection which is adapted to be engaged by the lower end of the piston to force the wall away from the body to thereby open the side port immediately before the piston reaches its lowermost position.

Claim 10

A liquid spraying device according to claim 6, in which the valve mechanism comprises a valve member held in place on the bottom of the cylinder, the cylinder having at least one side openings which are normally closed by the outer surface of the valve member, the valve member being tapered at its upper periphery, the piston having an end bore converging upwardly and a plurality of grooves formed in the wall of the end bore, the end bore being adapted to slidably receive the tapered periphery of the valve member to force it inwardly to thereby open the side openings of the cylinder immediately before the piston reaches its lowermost position.

Claim 11

A liquid spraying device according to claim 6, in which the valve mechanism comprises a valve member slidably received in an end bore of the piston, the valve member being normally urged against a valve seat provided at the lower end of the piston by the action of a spring, the piston having a side opening which is normally closed by the outer periphery of the valve member, the cylinder having a side opening for communicating the liquid pressurizing chamber with the receptacle when the valve member moves away from the valve seat, the check valve including an upwardly extending projection which is adapted to engage the valve member and move it upwardly relative to the piston immediately before the piston reaches its lowermost position.

Claim 12

A liquid spraying device according to claim 6, in which the valve mechanism comprises a valve member slidably received in an end bore of the piston, the valve member being normally urged against a valve seAt provided at the lower end of the piston by the action of a spring, the piston having a side opening which is normally closed by the outer periphery of the valve member, the cylinder having a side opening for communicating the liquid pressurizing chamber with the receptacle when the valve member moves away from the valve seat, the valve member having a downwardly extending projection which is adapted to engage the check valve immediately before the piston reaches its lowermost position, the valve member having an axial bore extending therethrough and at least one radially extending grooves formed at the lower end of the projection and communicating with the bore.

Claim 13

A liquid spraying device according to claim 6, in which the valve mechanism comprises a spring guide held in place on the bottom of the cylinder and having a peripheral flange, a valve member slidably received in the cylinder and biased against the undersurface of the peripheral flange by a spring received on the spring guide, the valve member normally closing at least one side openings formed in the cylinder, and a piston ring mounted to the lower end of the piston and having a plurality of legs, between which are formed a plurality of passages for communicating the liquid pressurizing chamber with the side openings immediately before the piston reaches its lowermost position.

Claim 14

A liquid spraying device according to claim 4, in which the passage means comprises a hollow stem formed of rigid material and fixed with respect to the spray head, the piston having a piston ring mounted thereon which is formed with an opening adapted to slidably receive the lower portion of the hollow stem in liquid-tight manner, the hollow stem being closed at its lower end and provided with at least one side ports adjacent the lower end, the side ports being adapted to be closed by the piston ring immediately before the piston reaches its lowermost position.

Claim 15

A liquid spraying device according to claim 6, in which the valve mechanism comprises a valve member standing in upright manner on the check valve and including a head in the shape of an umbrella, a cut-shaped member held in place on the check valve and having an opening through which the valve member extends, and a valve seat provided in an end bore of the piston.

Claim 16

A liquid spraying device according to claim 6, in which the valve mechanism comprises a support member held in place on the check valve so as not to hinder the opening movement of the check valve, a spring having its lower end secured to the support member, a conical valve member connected to the upper end of the spring, and a valve seat provided in end bore of the piston.

Claim 17

A liquid spraying device according to claim 6, in which the valve mechanism comprises a spring received in an end bore of the piston, a valve seat provided at the lower end of the end bore, and a ball normally urged against the valve seat by the action of the spring, the spring being so adjusted that the ball moves away from the valve seat when the pressure in the liquid pressurizing chamber increases above a predetermined level which is slightly higher the minimum pressure producing spray mist.

Claim 18

A liquid spraying device according to claim 6, in which the valve mechanism is provided by the lower end of the piston and the upper surface of the check valve, the lower end of the piston being tapered to form an annular space between the piston, the cylinder and the check valve when the lower end of the piston comes into liquid-tight contact with the upper surface of the check valve.