US 5,632,607 AGranted

Piston and valve arrangement for a wobble plate type pump

AssigneeShurflo Pump Manufacturing Co.

InventorsNiculae G. Popescu, Christopher J. Taylor-McCune, Michael A. George

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Abstract

A pump comprising a housing including first and second housing sections and a gasket between the first and second housing sections. The housing has a first pumping chamber, an inlet, an inlet passage in the housing leading from the inlet to the pumping chamber, an outlet and an outlet passage in the housing leading from the pumping chamber to the outlet. A pumping member is movable in the pumping chamber to pump fluid through the pump. Inlet and outlet check valves are provided in the inlet and outlet passages, respectively with each of the check valves including a movable valve element. The outlet check valve includes an outlet valve seat and a movable outlet valve element secured to the gasket at at least two spaced apart regions.

Claims19

Dependent claims

A pump comprising:

a housing including first and second housing sections;
a gasket between the first and second housing sections and including a section of flexible material;
at least one fastener for holding the first and second housing sections together;
said housing having at least a first pumping chamber, an inlet opening, an inlet passage in the housing leading from the inlet opening to the pumping chamber, an outlet opening and an outlet passage in the housing leading from the pumping chamber to the outlet opening;
a first pumping member movable in the first pumping chamber on an intake stroke whereby a fluid from the inlet passage is drawn into the first pumping chamber and a discharge stroke whereby fluid in the first pumping chamber is discharged into the outlet passage;
a drive for moving the pumping member on the intake and discharge strokes;
an inlet check valve in the inlet passage including an inlet valve seat and a movable inlet valve element which is integrally joined to the section of flexible material about a hinge whereby the movable inlet valve element is pivotable between open and closed positions;
and
an outlet check valve in the outlet passage including an outlet valve seat and a movable outlet valve element secured to the gasket at at least two spaced apart regions.

6 more elements

A pump comprising:

a housing;
a wobble plate in the housing, said wobble plate defining a chamber having a longitudinal axis and is at least partially defined by an interior surface angled relative to the longitudinal axis and extending over at least a major portion of the length of the chamber;
a wobble mechanism mounted in said housing for imparting wobbling motion to the wobble plate;
said housing having at least a first pumping chamber, an inlet opening, an inlet passage in the housing leading from the inlet opening to the pumping chamber, an outlet opening and an outlet passage in the housing leading from the pumping chamber to the outlet opening;
a pumping member partially located in the chamber defined by the wobble plate, removably secured to the wobble plate and driven by the wobble plate, the pumping member being movable in the pumping chamber on an intake stroke whereby a fluid from the inlet passage is drawn into the pumping chamber and a discharge stroke whereby fluid in the pumping chamber is discharged into the outlet passage;
and
said pumping member including a correspondingly angled surface in close proximity to the interior surface of the chamber.

4 more elements

A pump comprising:

a housing having a first pumping chamber, a second pumping chamber, an inlet opening, an inlet passage in the housing leading from the inlet opening to the pumping chambers, an outlet opening and an outlet passage in the housing leading from the pumping chambers to the outlet passage;
a wobble plate in the housing, the wobble plate defining first and second open ended chambers each of which having a first open end positioned generally toward the pumping chamber and an opposing second open end positioned generally away from the pumping chamber with the first open end being larger than the second open end;
a wobble mechanism mounted in the housing for imparting wobbling motion to the wobble plate;
a first pumping member driven by the wobble plate, removably secured to the wobble plate and partially located within the first open ended chamber and extending outwardly from both of the opposing open ends, the first pumping member being movable in the first pumping chamber on an intake stroke whereby a fluid from the inlet passage is drawn into the first pumping chamber and a discharge stroke whereby fluid in the first pumping chamber is discharged into the outlet passage;
a second pumping member driven by the wobble plate, removably secured to the wobble plate and partially located within the second open ended chamber and extending outwardly from both of the opposing ends, the second pumping member being movable in the second pumping chamber on an intake stroke whereby a fluid from the inlet passage is drawn into the second pumping chamber and a discharge stroke whereby fluid in the second pumping chamber is discharged into the outlet passage;
and
the first and second pumping members are separate from and independent of each other.

4 more elements

Dependencies are inferred from the claim text.