Pump

Claim 2

A combination valve and diaphragm assembly comprising: a. a crank arm terminating in an integrally formed, disk-shaped backing plate adjacent one end thereof and an integrally formed, annularly shaped coupling member at its opposite ends, b. means defining an opening through said backing plate, c. a diaphragm overlying said backing plate in laminar relationship thereto, d. means defining an opening through said diaphragm, e. a portion of said diaphragm projecting inwardly of said diaphragm opening in overlying relationship to said backing plate opening and forming a flapper valve, and f. means attaching said diaphragm to said backing plate.

Claim 3

The apparatus of claim 1 wherein said attaching means comprises: a. a retaining ring concentrically positioned on said diaphragm in overlying relationship thereto, and b. stud means extending between said backing plate and retaining ring and through said diaphragm to secure said backing plate, diaphragm and retaining ring in laminar relationship.

Claim 4

In a diaphragm-type pump including a first chamber having an outlet therefrom, a second chamber adjacent said first chamber, and first valve means interconnecting said first and second chambers and permitting fluid flow from said second chamber to said first chamber and preventing fluid flow from said first chamber to said second chamber, the improvement comprising: a. a diaphragm forming a wall of said second chamber, b. means defining an opening through said diaphragm, c. a backing plate, d. means for attaching said backing plate to said diaphragm with a section of said backing plate spanning said diaphragm opening, e. means defining an opening through said section of said backing plate, f. a portion of said diaphragm projecting inwardly of said opening therethrough within said second chamber and in overlying relationship to said opening in said backing plate, and g. means for reciprocally moving said backing plate with said diaphragm attached toward and away from an opposing wall portion of said second chamber to alternately decrease and increase the volume of said second chamber.

Claim 5

In a diaphragm-type pump including a first chamber having an outlet therefrom, a second chamber adjacent said first chamber, and first valve means interconnecting said first and second chambers and permitting fluid flow from said second chamber to said first chamber and preventing fluid flow from said first chamber to said second chamber, the improvement comprising: a. a diaphragm forming a wall of said second chamber, b. means defining an opening through said diaphragm, c. a backing plate, d. means for attaching said backing plate to said diaphragm with a section of said backing plate spanning said diaphragm opening, e. means defining an opening through said section of said backing plate, f. a portion of said diaphragm projecting inwardly of said opening therethrough within said second chamber and in overlying relationship to said opening in said backing plate, and g. means for reciprocally moving said backing plate with said diaphragm attached toward and away from an opposing wall portion of said second chamber to alternately decrease and increase the volume of said second chamber.

Claim 6

The apparatus of claim 3 wherein said attaching means comprises: a. a retaining ring overlying said diaphragm, and b. stud means formed integrally with said retaining ring, passing through said diaphragm and secured in said backing plate.

Claim 7

The apparatus of claim 3 wherein: a. said portions oF said diaphragm are of oblong configuration, b. a plurality of openings are formed through said backing plate, and c. each of said oblong portions overlies a plurality of said backing plate openings.

Claim 8

The apparatus of claim 3 further comprising: a. means defining a tortuous passage from a source of ambient air to an area adjacent said backing plate externally of said second chamber.

Claim 9

The apparatus of claim 6 further comprising: a. an enclosure surrounding said backing plate on the side thereof opposite said second chamber, b. said tortuous passage defining an inlet into said enclosure.

Claim 10

The apparatus of claim 7 wherein said tortuous passage comprises: a. means defining a continuous, nonlinear, slot in an outer face of said enclosure, b. means defining an aperture from one end of said slot into said enclosure, and c. a cover plate attached to said outer face in overlying relationship to said slot.

Claim 11

Fluid pumping apparatus comprising: a. means defining an enclosure, b. a rotatable drive shaft projecting into said enclosure, c. a crank arm rotatably and eccentrically mounted on said drive shaft, d. a backing plate mounted on an end of said crank arm opposite said drive shaft, e. means defining a series of openings through said backing plate, f. a diaphragm having means defining an opening therethrough and a plurality of flapper valves integrally formed with said diaphragm and projecting inwardly into said opening therethrough, g. a retaining ring having an inner dimension approximately equal to the inner dimension of said opening in said diaphragm and overlying said diaphragm concentrically thereof, h. a plurality of integrally formed studs projecting from one face of said retaining ring through said diaphragm and secured in said backing plate, with said diaphragm overlying said backing plate in laminar relationship thereto, i. means defining a first chamber having an outlet and an inlet, j. a flapper valve positioned within said first chamber in overlying relationship to said inlet, k. a portion of said means defining a first chamber including said inlet thereto overlying said diaphragm, clamping a peripheral portion thereof and defining therewith a second chamber communicating with said first chamber through said inlet thereto, and i. means defining a tortuous passage into said enclosure.

Claim 12

Fluid pumping apparatus comprising: a. means defining an enclosure, b. a rotatable drive shaft projecting into said enclosure, c. a crank arm rotatably and eccentrically mounted on said drive shaft, d. a backing plate mounted on an end of said crank arm opposite said drive shaft, e. means defining a series of openings through said backing plate, f. a diaphragm having means defining an opening therethrough and a plurality of flapper valves integrally formed with said diaphragm and projecting inwardly into said opening therethrough, g. a retaining ring having an inner dimension approximately equal to the inner dimension of said opening in said diaphragm and overlying said diaphragm concentrically thereof, h. a plurality of integrally formed studs projecting from one face of said retaining ring through said diaphragm and secured in said backing plate, with said diaphragm overlying said backing plate in laminar relationship thereto, i. means defining a first chamber having an outlet and an inlet, j. a flapper valve positioned within said first chamber in overlying relationship to said inlet, k. a portion of said means defining a first chamber including said inlet thereto overlying said diaphragm, clamping a peripheral portion thereof and defining therewith a second chamber communicating with said first chamber through said inlet thereto, and i. means defining a tortuous passage into said enclosure.