Pump mountable on two sizes of container
A cap ( 30 ) has an end wall ( 32 ) and inner and outer cylindrical walls ( 34, 36 ) which are internally threaded. The threads on the inner wall ( 30 ) mate with external threads on the neck ( 38 ) of a first sized container ( 40 ) the threads on the wall ( 38 ) are adapted to engage threads on the neck of a second, larger size container ( 44 ). A pump ( 10 ) is mounted on the cap ( 30 ).
1. A pump, comprising:
an elongated draw tube having a lower end inlet and an upper end portion;
a piston in said draw tube adapted to slide up and down in the draw tube;
a piston rod connected the piston and projecting upwardly from the piston and out from the draw tube;
a valve in said draw tube adapted to close when the piston moves downwardly into the draw tube, and to open when the piston moves upwardly in the draw tube; and
a mounting cap for the pump adapted to connect to a neck of a first container of a first size, and also connect to a neck of a second container of a second, larger size;
said mounting cap having a top wall, an inner cylindrical wall extending axially downwardly from the top wall, and an outer cylindrical wall extending axially downwardly from the top wall concentrically outwardly of the inner cylindrical wall;
said inner cylindrical wall having internal threads for connecting the cap to the external threads on the neck of the first container, with the draw tube extending downwardly into the first container;
said second cylindrical wall having internal threads for connecting the cap to external threads on the neck of the second, larger container, with the draw tube extending downwardly into the second container; and
said mounting cap being mounted on and rotatable about the draw tube and retained against up and down movement along the draw tube.
2. The pump of claim 1 , wherein the top wall of the mounting cap includes a central opening and an upper end portion of the elongated draw tube extends upwardly through said opening, said draw tube including a radial flange on the draw tube positioned below the top wall of the mounting cap where it boarders the opening in the mounting cap, and a retainer above the mounting cap engaging the upper end portion of the draw tube, said retainer preventing upward movement of the mounting cap off the upper end of the draw tube.
3. The pump of claim 2 , wherein the draw tube includes a piston chamber through which the piston moves as it slides up and down in the draw tube, and a flaring section at the upper end of the piston chamber that increases in diameter as it extends upwardly from the piston chamber to the upper end portion of the draw tube.
4. Then pump of claim 3 , where in the radial flange extends radially outwardly from where the upper end of the flare portion meets the upper end portion of the draw tube.
5. The pump of claim 1 , wherein the piston rod includes an outlet passageway for said pump, and said pump includes a depress button connected to an upper end portion of said piston rod.
6. The pump of claim 2 , wherein the piston rod includes an outlet passageway for said pump, and said pump includes a depress button connected to an upper end portion of said piston rod.
7. The pump of claim 3 , wherein the piston rod includes an outlet passageway for said pump, and said pump includes a depress button connected to an upper end portion of said piston rod.
8. The pump of claim 4 , wherein the piston rod includes an outlet passageway for said pump, and said pump includes a depress button connected to an upper end portion of said piston rod.
9. The pump of claim 5 , wherein the outlet passageway has a portion extending through the depress button, and said pump includes a discharge passageway reading laterally from the portion of the outlet passageway that is in the depress button.