Patent ID: 9709042
Date: 2017-07-18
CPC Classifications: F04B,F04F

Claim:
1. A disc pump comprising: a pump body having a cylindrically shaped sidewall closed at both ends by a first end wall and a driven end wall having a central portion and a peripheral portion extending radially outwardly from the central portion; an internal sidewall having a diameter and comprising a coil coupled at one end to the first end wall, the internal sidewall disposed within the cylindrically shaped sidewall, wherein the internal sidewall, the first end wall, and the driven end wall define a cavity; an actuator operatively associated with the central portion of the driven end wall to cause oscillatory motion of the driven end wall at a drive frequency (f), thereby generating displacement oscillations of the driven end wall resulting in a change in temperature, the diameter of the internal sidewall being variable in response to the change in temperature; an isolator operatively associated with the peripheral portion of the driven end wall to reduce dampening of the displacement oscillations; a first aperture disposed at any location in either one of the first end wall and the driven end wall other than at an annular node; a second aperture disposed at any location in the pump body other than the location of the first aperture; a valve disposed in at least one of the first aperture and the second aperture; whereby the displacement oscillations generate corresponding pressure oscillations of a fluid within the cavity of the pump body causing fluid flow through the first aperture and second aperture when in use.