James A Lawless

US Patent:

43599028, Nov 23, 1982

Filed:

Jul 31, 1980

Appl. No.:

6/174133

Inventors:

James C. Lawless - Randolph NJ

International Classification:

G01F 2328

US Classification:

73290R

Abstract:

An apparatus and method for using microwaves to measure the level of liquid within a container comprising a waveguide for immersion into the liquid, an oscillating means for propagating a sweeping frequency electromagnetic signal down the waveguide for reflection from the surface of the liquid, impedance matched means for receiving the reflected signal and means for comparing the frequency of the reflected signal to the frequency of another output signal of the oscillating means, whereby the frequency difference corresponds to the time of travel of the signal within the waveguide and therefore the distance the signal travels before reflection.

US Patent:

49057197, Mar 6, 1990

Filed:

Apr 13, 1989

Appl. No.:

7/338494

Inventors:

James C. Lawless - Summit NJ

International Classification:

G05D 700

US Classification:

137 1

Abstract:

A system and method for pumping liquid fluorocarbons and the like from a pressurized supply container to another container. The system compensates for the inherent vapor pressure drop occuring within any pressurized container of fluorocarbons as the fluorocarbons are pumped out. A phase conversion apparatus is provided to recirculate a portion of the liquid being pumped from the downstream side of the pump, through a phase conversion chamber into the supply tank in a vapor phase. This prevents a vapor pressure drop in the supply tank and avoids the flashing of the liquid into a gas at the discharge connection of the supply container. The invention also comprises an improved fluorocarbon gear pump and pressure regulation means. The gear pump utilized offset gear axes and porous gears to form a liquid film over the gears to prevent deleterious contact in the pump and extend useful pump life.