Multiple diaphragm pump
AssigneeBlue-White Industries, Ltd.
InventorsRobert E. Gledhill, III, John Nguyen
Life of this patent
Estimating the term…
Abstract
A diaphragm pump assembly can include a pump drive chamber, a first pump diaphragm chamber, and a second pump diaphragm chamber. The assembly can include a pump motor configured to rotate a motor shaft extending into the pump drive chamber. The assembly can include a cam connected to the motor shaft and configured to rotate in response to rotation of the motor shaft. The assembly can include a drive yoke having a yoke frame and a yoke pocket having a first wall and a second wall parallel and opposite the first wall. First and second pistons can connect to the drive yoke and to first and second diaphragms, respectively. The diameter of the cam can be less than and within 5% the width of yoke pocket and the yoke can be configured to move the pistons along a straight line.
Claims17
A diaphragm pump assembly comprising:
- a first diaphragm chamber having an inlet, an outlet, and a first flexible wall;
- a second diaphragm chamber having an inlet, an outlet, and a second flexible wall;
- a pump drive chamber positioned between the first diaphragm chamber and the second diaphragm chamber;
- a drive yoke positioned within the pump drive chamber, the drive yoke defining a yoke pocket;
- a motor;
- a motor shaft connected to the motor and extending into the pump drive chamber and into the yoke pocket, the motor shaft having an axis;
- an offset cam configured to rotate in response to rotation of the motor shaft and positioned within the yoke pocket, wherein the motor shaft extends beyond the offset cam opposite the motor;
- a first piston connected to the first flexible wall and to the drive yoke;
- a second piston connected to the second flexible wall and to the drive yoke;
- a motor shaft support positioned on a side of the offset cam opposite the motor, the motor shaft support resisting translation of the motor shaft in a direction perpendicular to the axis of the motor shaft,
- wherein a portion of the motor shaft extends beyond the drive yoke opposite the motor and the motor shaft support resists translation of the portion of the motor shaft beyond the drive yoke opposite the motor in the direction perpendicular to the axis of the motor shaft.
A diaphragm pump assembly comprising:
- a first diaphragm chamber having an inlet, an outlet, and a first flexible wall;
- a second diaphragm chamber having an inlet, an outlet, and a second flexible wall;
- a housing defining a pump drive chamber positioned between the first diaphragm chamber and the second diaphragm chamber;
- a drive yoke positioned within the pump drive chamber defining an interior of the drive yoke, the drive yoke defining a yoke pocket;
- a motor;
- a motor shaft connected to the motor and extending into the pump drive chamber within the interior of the drive yoke, the motor shaft having an axis;
- an offset cam configured to rotate in response to rotation of the motor shaft and positioned within the interior of the drive yoke;
- a first piston connected to the first flexible wall and to the drive yoke;
- a second piston connected to the second flexible wall and to the drive yoke;
- and
- a motor shaft support positioned on a side of the drive yoke opposite the motor, the motor shaft support having a first pair of arms which spans the drive yoke and is secured to the housing on either side of the pump drive chamber, and
- wherein a portion of the motor shaft extends beyond the drive yoke opposite the motor and the motor shaft support resists translation of the portion of the motor shaft beyond the drive yoke opposite the motor in a direction perpendicular to the axis of the motor shaft.
Dependencies are inferred from the claim text.