Pump provided with diaphragms and an eccentric rotation shaft

• US 6,716,005 B2
• Filed: 09/25/2002
• Issued: 04/06/2004
• Est. Priority Date: 10/10/2001
• Status: Active Grant

• Current Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Original Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Inventors: Yamakawa, Muneharu
• Primary Examiner(s): FREAY, CHARLES GRANT
• Application Number:
  US10/253,416
• Publication Number:
  US 20030068242A1
• Time in Patent Office: 559 Days
• Field of Search: 417/523, 417/529, 417/269, 417/521, 417/413.1, 92/71, 74/55, 74/56, 74/60
• US Class Current: 417/521
• CPC Class Codes: F04B 43/026 each plate-like pumping flexible member working in its own pumping chamber
• CPC Class Codes: F04B 43/028 with in- or outlet valve arranged in the plate-like flexible member valve arranged in the piston F04B53/12
• CPC Class Codes: F04B 43/04 Pumps having electric drive
• CPC Class Codes: Y10T 74/18336 Wabbler type

Abstract

In a pump, a plurality of pump chambers are defined by a plurality of diaphragms. A pivotable member is attached to the diaphragms. A rotator is formed with a first hole having a first diameter, which is arranged eccentrically from a rotation center of the rotator, and a second hole having a second diameter smaller than the first diameter, which is formed in a bottom of the first hole. A shaft member connects the rotator and the pivotable member so as to convert a rotation of the rotator into a pivotal movement of the pivotable member for sequentially deforming each diaphragm to vary a volume of each pressure chamber. One end of the shaft member is fitted into the second hole.

Claims

1. A pump, comprising:

a plurality of diaphragms, which define a plurality of pump chambers;

a pivotable member, attached to the diaphragms;

a rotator, formed with a first hole having a first diameter, which is arranged eccentrically from a rotation center of the rotator, and a second hole having a second diameter smaller than the first diameter, which is formed in a bottom of the first hole;

a shaft member, which connects the rotator and the pivotable member so as to convert a rotation of the rotator into a pivotal movement of the pivotable member for sequentially deforming each diaphragm to vary a volume of each pressure chamber,

wherein one end of the shaft member is fitted into the second hole.

2. The pump as set forth in claim 1, wherein a part of a circumferential edge of the first hole serves as a part of a circumferential edge of the second hole.