Title: Micro-metering system

Abstract: A housing having an inlet port and an outlet port utilizes a variable volume cavity connected to the housing and includes a device for limiting the volume of the cavity which is alternately filled through the inlet port and exhausted through the outlet port using a spool valve. The spool valve is arranged to prevent continuous communication of fluid between the inlet and outlet ports. The volume of the variable volume cavity can be varied using electro-expansive or piezoelectric apparatus. The spool valve is reciprocated between the inlet and outlet ports using an electromechanical device and a motion amplifier.

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Inventors: O'neill, Cormac G. (Contra Costa County, CA)
Smiley, Parker C. (Alameda County, CA)

Application Number: 06/024316
Filing Date: 1979-03-27
Publication_date: 1981-06-09
Assignee: PHYSICS INT CO

Primary Class(es): 222/282 222/137, 137/625.250, 222/333, 222/335
Other Classes: F01L25/08; F04B43/04; G01F11/08; F01L25/00; F04B43/02; G01F11/02; G01F11/08
US Patent Ref:

2864535	December, 1958	Modes	222/504
3194448	July, 1965	Theall	222/43
3415277	December, 1968	Mitchell et al.	222/386.5
3465732	September, 1969	Kattchee	251/129
3524474	August, 1970	McCormick	137/625.61
3614486	October, 1971	Smiley	251/129

Other Refs:
Primary Examiner: Skaggs, Grant H.
Assistant Examiner:
Attorney: Tipton, Robert R.

Claims:

We claim: