US 2014/0154117 A1 · DIAPHRAGM PUMP

Abstract

This invention provides a diaphragm pump that decreases the number of components or improves workability in assembling. A crank (4) to which the output shaft (2a) of a motor (2) is pivotally attached has, in its upper surface, a ring-shaped insertion groove (5) with respect to the output shaft (2a) as the center. A projecting driving shaft (9b) is formed integrally with a driver (7). When the lower end (9c) of the driving shaft (9b) is inserted into the insertion groove (5), the axis (9d) tilts. When the crank (4) rotates, an engaging portion provided in the insertion groove (5) engages with the lower end (9c). The driving shaft (9b) rotates while changing the tilt direction of the axis (9d) following the rotation of the crank (4). Hence, when a diaphragm portion (12a) attached to the drive element (7a) of the driver (7) moves upward/downward, a pump chamber (18) expands/contracts so that a pump action is obtained.

Claims7

Dependent claims

A diaphragm pump comprising:

a motor serving as a driving source;
a crank that is rotated by said motor and has a ring-shaped insertion groove in an upper surface;
a pump chamber that is formed from a diaphragm including a diaphragm portion and expands/contracts in accordance with reciprocal motion of said diaphragm portion;
a driver that reciprocally moves said diaphragm portion by an oscillation operation;
a driving shaft that projects from said driver and engages with said insertion groove of said crank with respect to a rotation axis of said crank as a center;
and
an engaging portion that is formed in said insertion groove, and engages with said driving shaft to make said driving shaft follow the rotation of said crank,
wherein said driving shaft and said driver are integrally formed from a single material or different materials.

5 more elements

Dependencies are inferred from the claim text.

Diaphragm pump

Life of this patent

Diaphragm pump

Life of this patent

Abstract

Claims7