Pump

Claim 2

A pump for pumping small quantities of liquid, comprising: a. a pump body; b. a pumping chamber in said body; c. reciprocating means associated with said pumping chamber so as to increase and decrease the volume thereof; d. an inlet passageway in fluid communication with said pumping chamber having check valve means associated therewith to prevent reverse fluid flow; e. a discharge passageway in fluid communication with an upper portion of said pumping chamber to discharge accumulated gases and excess liquid from said pumping chamber, said discharge passageway having check valve means associated therewith to prevent flow of fluid into said pumping chamber; f. An outlet passageway in fluid communication with said pumping chamber having check valve means associated therewith to prevent the flow of fluid into said pumping chamber; and g. means associated with said reciprocating means positioned below said discharge passageway for periodically collecting a predetermined quantity of liquid devoid of accumulated gasses from said pumping chamber and directing it through said outlet passageway while directing said excess liquid and accumulated gasses through said discharge passageway.

Claim 3

The invention of claim 1 wherein said inlet passageway is always in fluid communication with said discharge passageway.

Claim 4

The invention of claim 1 wherein said means is selectively adjustable so as to control the quantity of fluid directed through said outlet passageway.

Claim 5

The invention of claim 1 wherein said means includes a bore portion in fluid communication with said pumping chamber and plunger means to enter said bore portion and force a predetermine quantity of fluid from said bore portion through said outlet passageway.

Claim 6

The invention of claim 4 wherein the maximum penetration of said plunger means into said bore portion is selectively adjustable so as to control the quantity of fluid directed through said outlet passageway.

Claim 7

A pump for pumping small quantities of liquid, comprising: a. a pump body; b. a pumping chamber in said body; c. a small diameter bore in fluid communication with said pumping chamber; d. a flexible diaphragm dividing said chamber into first and second areas, said first area being in fluid communication with said bore; e. plunger means attached to said diaphragm and positioned within said first area so as to permit movement into and out of said bore; f. reciprocating means associated with saiD diaphragm so as to move said diaphragm and said plunger means back and forth and thereby increase and decrease the volume of said first area while moving said plunger means into and out of said bore; g. an inlet passageway in fluid communication with a portion of said first area, having check valve means associated therewith to prevent reverse flow of fluid; h. a discharge passageway in fluid communication with an upper portion of said first area having check valve means associated therewith to prevent the flow of fluid into said first area; and i. an outlet passageway in fluid communication with said bore having check valve means associated therewith to prevent the reverse flow of fluid into said bore.

Claim 8

A pump for pumping small quantities of liquid, comprising: a. a pump body; b. a pumping chamber in said body; c. a small diameter bore in fluid communication with said pumping chamber; d. a flexible diaphragm dividing said chamber into first and second areas, said first area being in fluid communication with said bore; e. plunger means attached to said diaphragm and positioned within said first area so as to permit movement into and out of said bore; f. reciprocating means associated with saiD diaphragm so as to move said diaphragm and said plunger means back and forth and thereby increase and decrease the volume of said first area while moving said plunger means into and out of said bore; g. an inlet passageway in fluid communication with a portion of said first area, having check valve means associated therewith to prevent reverse flow of fluid; h. a discharge passageway in fluid communication with an upper portion of said first area having check valve means associated therewith to prevent the flow of fluid into said first area; and i. an outlet passageway in fluid communication with said bore having check valve means associated therewith to prevent the reverse flow of fluid into said bore.

Claim 9

The invention of claim 6 wherein when said plunger means is positioned within said bore said inlet passageway is not in fluid communication with said bore and when said plunger means is not positioned within said bore said inlet passageway is in fluid communication with said bore.

Claim 10

The invention of claim 6 wherein means is provided to increase and decrease the maximum penetration of said plunger means into said bore and thereby control the flow rate through said outlet passageway.

Claim 11

The invention of claim 6 wherein said inlet passageway is always in fluid communication with said discharge passageway.

Claim 12

A pump for pumping small quantities of liquid, comprising: a. a pump body; b. a pumping chamber in said body; c. a flexible diaphragm dividing said chamber into first and second areas; d. means positioned within said body having a surface in contact with said first area; e. a small diameter bore in said means in fluid communication with said first area; f. plunger means attached to said diaphragm and positioned within said first area so as to permit movement into and out of said bore; g. reciprocating means associated with said diaphragm so as to move said diaphragm and said plunger means back and forth and thereby increase and decrease the volume of said first area while moving said plunger means into and out of said bore; h. an inlet passageway in fluid communication with a portion of said first area having check valve means associated therewith to prevent reverse of flow of fluid; i. a discharge passageway in fluid communication with an upper portion of said first area having check valve means associated therewith to prevent the flow of fluid into said first area; and j. an outlet passageway in fluid communication with a portion of said bore spaced from said first area having check valve means associated therewith to prevent the reverse flow of fluid into said bore.

Claim 13

A pump for pumping small quantities of liquid, comprising: a. a pump body; b. a pumping chamber in said body; c. a flexible diaphragm dividing said chamber into first and second areas; d. means positioned within said body having a surface in contact with said first area; e. a small diameter bore in said means in fluid communication with said first area; f. plunger means attached to said diaphragm and positioned within said first area so as to permit movement into and out of said bore; g. reciprocating means associated with said diaphragm so as to move said diaphragm and said plunger means back and forth and thereby increase and decrease the volume of said first area while moving said plunger means into and out of said bore; h. an inlet passageway in fluid communication with a portion of said first area having check valve means associated therewith to prevent reverse of flow of fluid; i. a discharge passageway in fluid communication with an upper portion of said first area having check valve means associated therewith to prevent the flow of fluid into said first area; and j. an outlet passageway in fluid communication with a portion of said bore spaced from said first area having check valve means associated therewith to prevent the reverse flow of fluid into said bore.

Claim 14

The invention of claim 10 wherein when said plunger means is at its forward stroke it is spaced a short distance from said outlet passageway and said bore is not in fluid communication with said first area and when said plunger means is at its rearward stroke it is spaced from said bore and thereby permits fluid communication between said first area and said bore.

Claim 15

The invention of claim 11 wherein an O-ring is recessed in the bore sidewalls adjacent said first area so as to close off fluid communication between said first area and said bore when said plunger means contacts said O-ring.

Claim 16

The invention of claim 12 wherein a sealing ring having a rectangular cross section is provided inwardly from, and adjacent to, said O-ring.

Claim 17

The invention of claim 10 wherein said reciprocating means includes a reciprocating piston having a rectangular cross section positioned within a rectangular shaped bore; said piston having bearing rods at its four edges to contact the corners of said rectangular shaped bore and thereby reduce friction therebetween.

Claim 18

The invention of claim 10 wherein said means, and the bore positioned therein, are adjustably mounted to said body so as to permit said bore to be selectively moved towards and away from said plunger means and thereby adjust the maximum penetration of said plunger means into said bore.

Claim 19

A pump for pumping small quantities of liquid, comprising: a. a pump body; b. a pumping chamber in said body; c. a reciprocating piston associated with said pumping chamber so as to increase and decrease the volume thereof; d. a bore associated with said piston in a facing relationship to said pumping chamber; e. a member positioned relative to said bore so as to move into and out of said bore in a closely fitting relationship; f. an inlet passageway in fluid communication with a lower portion of said pumping chamber having check valve means associated therewith to prevent reverse flow of fluid; g. a discharge passageway in fluid communication with an upper portion of said pumping chamber above said bore to discharge accumulated gasses and excess liquid from said pumping chamber, said discharge passageway having check valve means associated therewith to prevent flow of fluid into said pumping chamber; and h. an outlet passageway passing through said member having check value means associated therewith such that only when said member enters said bore will the liquid contained in said bore be forced through said outlet passageway.

Claim 20

A pump for pumping small quantities of liquid, comprising: a. a pump body; b. a pumping chamber in said body; c. a reciprocating piston associated with said pumping chamber so as to increase and decrease the volume thereof; d. a bore associated with said piston in a facing relationship to said pumping chamber; e. a member positioned relative to said bore so as to move into and out of said bore in a closely fitting relationship; f. an inlet passageway in fluid communication with a lower portion of said pumping chamber having check valve means associated therewith to prevent reverse flow of fluid; g. a discharge passageway in fluid communication with an upper portion of said pumping chamber above said bore to discharge accumulated gasses and excess liquid from said pumping chamber, said discharge passageway having check valve means associated therewith to prevent flow of fluid into said pumping chamber; and h. an outlet passageway passing through said member having check value means associated therewith such that only when said member enters said bore will the liquid contained in said bore be forced through said outlet passageway.

Claim 21

The invention of claim 16 wherein means is provided to increase and decrease the maximum penetration of said member into said bore and thereby control the flow rate through said outlet passageway.

Claim 22

The invention of claim 16 wherein said inlet passageway is always in fluid communication with said discharge passageway.

Claim 23

The invention of claim 16 where an O-ring is recessed in the bore sidewalls adjacent said pumping chamber so as to close off fluid communication between said bore and said pumping chamber when said member contacts said O-ring.

Claim 24

The invention of claim 19 wherein a sealing ring having a rectangular cross section is provided inwardly from, and adjacent to, said O-ring.

Claim 25

The invention of claim 16 wherein said member is adjustabley mounted to said body so as to permit said member to be selectively moved towards and away from said bore and thereby adjust the maximum penetration of said member into said bore.