Stephen E Walters

US Patent:

43467423, Aug 31, 1982

Filed:

Jun 2, 1980

Appl. No.:

6/155472

Inventors:

Charles Chase - Elk Groove CA
Stephen Walters - Citrus Heights CA
Richard E. Meador - Sacramento CA

Assignee:

P.M. America, Inc. - Sacramento CA

International Classification:

B65B 332

US Classification:

141 1

Abstract:

Improved method for the pick up and delivery of a liquid test sample and diluent therefore by a single syringe having a syringe valve for placing the syringe barrel in fluid connection with either a diluent pick up line or a sample pick-up line. The method is comprised essentially of the steps of priming the apparatus, picking up the diluent through the diluent pick-up line and thereafter with a continuing downward stroke of the syringe plunger picking up a percentage volume of liquid sample. Preferably, an air bubble is picked up in the end of the sample pick-up line before the sample pick-up cycle. After the full downward stroke of the syringe plunger, the diluted sample is delivered by depressing the plunger to its zero volume setting. An apparatus is provided having a computer controlled syringe plunger drive which includes a zero volume switch, and a computer controlled syringe valve having branch ports adapted to be connected to a diluent and a sample pick-up line. The computer control sequences the plunger drive and the syringe valve to pick-up diluent and sample and deliver diluent and sample as above-described.

US Patent:

57516618, May 12, 1998

Filed:

Aug 12, 1996

Appl. No.:

8/695728

Inventors:

Stephen M. Walters - Penn Valley CA

Assignee:

Tri-Continent Scientific, Inc. - Grass Valley CA

International Classification:

G04B 4700
G04C 5700
G07F 1100

US Classification:

368 10

Abstract:

A medication dosage timing apparatus which measures and displays time in response to the opening and closing of a medication bottle or container. A timing circuit and display are mounted on a circuit board and attached to a container cap. A battery is mounted on a disk which slidably moves within the container cap between a first position wherein electrical contacts on the circuit board engage the battery and activate or power the timing circuit and display, and a second position wherein the electrical contacts are disengaged from the battery and the timing circuit and display are deactivated. When the container cap is attached to the container, the battery and disk are held in the first activating position, and when the container cap is removed from the container, the battery and disk slide down into second, deactivating position. Each time a user opens and closes the medication container, the timing circuit and display are reset and re-started. By observing the display on the cap of the closed container, the user can ascertain the time elapsed since the container was last opened to remove medication.