The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 1993
Filed:
Nov. 08, 1991
Eric P Muntz, Pasadena, CA (US);
Daniel A Erwin, Venice, CA (US);
Joseph A Kunc, Rancho Palos Verdes, CA (US);
Geoffrey R Shiflett, Los Angeles, CA (US);
University of Southern California, Los Angeles, CA (US);
Abstract
A microdevice in the form of a microactuator or micropump. A microdevice for providing reciprocating motion at a high repetition rate, including a cell having an output wall with at least a portion movable, such as a diaphragm or inlet and outlet valves. A charge of gas in the cell and a source for cyclicly and directly heating the gas to increase the gas pressure in the cell and move the diaphragm or control the valves, the source for heating including a pulsed source for generating transient gas pressure increases in the cell at cycle times of not more than about 50 microseconds, with the cell including an arrangement for cooling the gas for reducing the gas pressure in the cell. In one embodiment, the source for heating includes a source of photons and an arrangement for directing the photons into the cell to the gas or to the cell inner surface. In another embodiment, the source for heating includes a thin film of resistance heating material on an inner surface of the cell, and an arrangement for connecting a pulsed electric power source to the film. Another embodiment includes an arrangement for producing electrical discharge pulses within the cell for heating the gas.