Browse Prior Art Database

Squeeze Pump

IP.com Disclosure Number: IPCOM000060755D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Hammer, R: AUTHOR [+4]

Abstract

A squeeze pump for compression or vacuum pumping of a fluid is provided with a flexurally vibrating, cupping disk bearing which traps the fluid under it as the central and circumferential regions alternately move towards and away from a base plate against which the disk bearing interacts to create pressure differences. An orifice in the base plate can be pumped by the disk bearing to either an above ambient or below ambient pressure, depending on the location of the disk bearing over the orifice. A squeeze bearing [*] adapted for use in the present pump takes the form of a laminated, cupping disk bearing A, as shown in Fig. 1. The disk bearing A is composed of two layers, M and P, at least one of which is a piezoelectric material, to generate the required vibration with respect to abase plate S.

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Squeeze Pump

A squeeze pump for compression or vacuum pumping of a fluid is provided with a flexurally vibrating, cupping disk bearing which traps the fluid under it as the central and circumferential regions alternately move towards and away from a base plate against which the disk bearing interacts to create pressure differences. An orifice in the base plate can be pumped by the disk bearing to either an above ambient or below ambient pressure, depending on the location of the disk bearing over the orifice. A squeeze bearing [*] adapted for use in the present pump takes the form of a laminated, cupping disk bearing A, as shown in Fig. 1. The disk bearing A is composed of two layers, M and P, at least one of which is a piezoelectric material, to generate the required vibration with respect to abase plate S. The cupping and uncupping action is provided at a predetermined ultrasonic frequency of an oscillator O to afford a continuous vibration of the disk bearing A with its outer circumferential edges flapping and the central region inside a vibratory nodal circle pumping upwardly and downwardly with the solid disk bearing A cupped upwardly and the dotted disk bearing A' cupped downwardly. The present pump can be made by using the aforesaid type of squeeze bearing with two separated edges, each with different vibration amplitudes or displacements. One edge becomes an intake, and the other is an exhaust. A simple example of the present pump is shown in Fig. 2A. One...