Wobble plate pump
OwnerE. Dale Hartley, F. Scott Hartleyinventors
Life of this patent
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Abstract
A pump assembly comprising a housing having a cavity therein, an inlet leading to the cavity and an outlet leading from the cavity and a wobble plate mounted for nutating movement in the cavity. The wobble plate divides the cavity into first and second pumping chambers, and during its nutating movement, liquid entering the inlet into the pumping chambers is pumped by the wobble plate through the outlet. The pump can be driven by a motor. The cavity has opposing wall sections and a resilient member is provided for resiliently urging the wobble plate toward the opposing wall section to improve the priming capability of the pump. Other features improve the priming capability of the pump along the periphery of the wobble plate.
Claims21
A pump comprising:
- a housing having a cavity therein, an inlet leading to said cavity and an outlet leading from said cavity;
- a wobble plate in said cavity dividing said cavity into first and second pumping chambers, said wobble plate having a passage;
- said cavity having opposing wall sections configured to allow nutating movement of the wobble plate;
- a mounting assembly for mounting the wobble plate for said nutating movement in said cavity whereby liquid entering the inlet into the pumping chambers can be pumped by the wobble plate through the outlet as a result of the nutating movement and cooperation between the wobble plate and the opposing wall sections;
- and
- the mounting assembly including a resilient member in the passage of the wobble plate for resiliently loading the wobble plate against at least one of the opposing wall sections.
A pump comprising:
- a housing having a cavity therein, an inlet leading to said cavity and an outlet leading from said cavity;
- a wobble plate in said cavity dividing said cavity into first and second pumping chambers, said wobble plate having a central passage;
- said cavity having opposing wall sections configured to allow nutating movement of the wobble plate, the wobble plate being mounted for nutating movement in said cavity whereby liquid entering the inlet into the pumping chambers can be pumped by the wobble plate through the outlet as a result of the nutating movement and cooperation between the wobble plate and opposing wall sections;
- and
- a resilient member in said central passage of the wobble plate for resiliently urging the wobble plate toward the opposing wall sections.
A pump as defined in claim 8 wherein the wobble plate includes a central hub having said central passage therein, a bushing in the central passage and having a bore therein, the axes of the central passage and the bore being inclined with respect to each other whereby rotation of the bushing imparts said nutating movement to the wobble plate, and said bushing includes the resilient member.
A pump comprising:
- a housing have a cavity therein, an inlet leading to said cavity and an outlet leading from said cavity;
- a wobble plate in said cavity dividing said cavity into first and second pumping chambers;
- the wobble plate having a central passage, a bushing in the central passage and having a bore therein, the axes of the central passage and the bore being inclined with respect to each other whereby a rotary input applied to the bushing along the axis of the bore imparts a nutating movement to the wobble plate so that liquid entering the inlet into the pumping chambers is pumped by the wobble plate through the outlet;
- and
- said bushing including a resilient member.
A pump as defined in clam 16 wherein the bushing includes an outer sleeve in the central passage of the hub, an inner sleeve received in the sleeve passage and having said bore therein, said outer sleeve is pivotable relative to the, inner sleeve and said resilient member is between the outer and inner sleeves and urges the outer sleeve to pivot relative to the inner sleeve.
A pump comprising:
- a housing having a cavity with opposing part-spherical sections, said housing having an inlet leading to said cavity and an outlet leading from said cavity;
- a wobble plate in said cavity and dividing said cavity into first and second pumping chambers, the wobble plate including a central part-spherical hub and a flange circumscribing the hub, said central hub being between said opposing part-spherical sections of said cavity;
- means for mounting the wobble plate for nutating movement in said cavity whereby liquid entering the inlet into the pumping chambers is pumped by the wobble plate through the outlet;
- motor means including a rotatable shaft for driving the wobble plate in said nutating movement;
- said mounting means including a central passage in the central hub of the wobble plate, a bushing in the central passage and having a bore therein which drivingly receives the rotatable shaft of the motor means, said bushing being separate from the motor shaft and having opposite ends which confront and are between the opposing part-spherical sections of said cavity, the axes of the central passage and bore being inclined relative to each other whereby a rotary input applied to the bushing along the axes of the bore by the rotatable shaft of the motor means imparts said nutating movement to the wobble plate;
- said cavity having opposing wall sections cooperable with the wobble plate to pump the liquid;
- and
- means for resiliently urging the flange toward the opposing wall sections.
Dependencies are inferred from the claim text.